Payments Interoperability

Understanding the Hidden Architecture Behind Global Payments

For most merchants, “payments” means Stripe, Visa, and maybe PayPal. That’s the visible layer. The part customers see at checkout.

Underneath runs something far more complex.

A web of protocols, standards, and networks that lets a customer in Singapore pay a merchant in Brazil, settling in seconds, with fraud checks running across three continents. This infrastructure is called interoperability, and it’s being rebuilt right now.

The numbers tell you why it matters.

Cross-border payments moved $23.5 trillion in 2020. Those transactions cost $120 billion in fees, roughly the GDP of Morocco. The global average cost to send $200 across borders still sits at 6.35%, well above the UN’s 3% target for 2030.

Interoperability is what brings those costs down.

When domestic instant payment systems connect directly, when protocols align across networks, when APIs speak the same language, friction drops. Thailand and Singapore proved this. Their linked instant payment schemes cut remittance costs from 10% to under 1% while moving money in minutes instead of days.

This isn’t just about cheaper fees. It’s about making payments as seamless as sending an email, regardless of country, currency, or payment method.

For merchants, that means access to customers who couldn’t previously pay you. For PSPs, it means surviving in a market where orchestration trumps simple processing.

Let me show you how the pieces actually fit together.

What Interoperability Actually Means

Interoperability is the ability of different payment systems, networks, and platforms to exchange information and process transactions seamlessly, regardless of their underlying technology or geographic location.

Think about email. You can send a message from Gmail to Outlook to ProtonMail without thinking about it. SMTP, the protocol underneath, handles the translation. Payment interoperability works the same way, just with money instead of messages.

Without it, you get silos.

A customer with UPI in India can’t pay a merchant who only accepts cards. A business in Malaysia can’t send instant payments to Thailand. Each network speaks its own language, and connecting them requires expensive intermediaries who translate between systems.

Interoperability solves this by standardizing three things: the messages systems exchange, the networks that route transactions, and the commercial relationships that make it all economically viable.

The shift is happening because the old model broke.

Correspondent banking relationships dropped 20% between 2012 and 2018, even as cross-border volumes grew. The network became more concentrated, more expensive, and slower. Remittances that should take seconds were taking days and costing 7% of the transfer amount.

New rails are fixing this, but only if they can talk to each other.

The Four Layers That Make Interoperability Work

Payment interoperability isn’t one thing. It’s a stack, with each layer handling different problems. Technical standards at the bottom, strategic governance at the top. By understanding the layers, you can see where the friction lives and where innovation can happen.

Layer One: Technical Infrastructure

This is the plumbing. Message formats, APIs, authentication protocols, and tokenization standards. Boring stuff that works invisibly until it doesn’t.

The industry spent decades on ISO 8583, the card transaction standard from 1987. It worked, but it’s limited. Each message carries fixed fields with minimal data, often leading to truncated information and manual repairs during reconciliation.

The replacement is ISO 20022, an XML/JSON-based framework that carries three times more data than ISO 8583. This matters because richer data means fewer errors. When remittance information arrives complete and structured, systems can process it automatically instead of flagging it for manual review.

SWIFT is migrating its entire network to ISO 20022 by November 2025.

The results so far are significant.

About 60% of SWIFT gpi payments now reach beneficiaries within 30 minutes. Virtually all credit within 24 hours. That’s down from multi-day transfers just a few years ago. Over 4,450 banks have joined gpi, moving more than $530 billion daily on upgraded infrastructure.

Standardized messages reduce latency and errors.

A BIS analysis found that aligning APIs and messages to a common ISO 20022 data model allows payments to move across networks without manual intervention or translation services. The efficiency gain compounds as more networks adopt the standard.

Beyond messaging, APIs enable direct system-to-system communication. The W3C’s Payment Request API standardizes online checkouts, letting browsers autofill payment details in a consistent way. This cuts form friction, especially on mobile where 70% of e-commerce traffic now flows.

Open banking APIs have unleashed even more innovation.

PSD2 in Europe, similar regimes in the UK, Brazil, and India. These standards use secure OAuth 2.0 flows and JSON schemas to let fintechs and merchants initiate payments with customer consent. The UK now counts over 15 million Open Banking users as of 2025, nearly one in three adults.

India’s UPI shows what’s possible at scale.

The system processed 15 billion transactions per month by late 2024, all through interoperable bank APIs and QR codes. This didn’t require new infrastructure. It required standardized interfaces that let any bank connect to any other bank in real time.

Authentication standards are evolving too.

EMV 3-D Secure 2.x replaced clunky pop-ups with app-based flows that pass richer risk data. Visa noted 66% lower dropout rates with 3DS 2.0’s frictionless flow. Despite stronger authentication requirements in Europe, merchants saw authorization rates increase by up to 10% because issuers could approve more legitimate transactions.

FIDO2 authentication, using device biometrics and public-key cryptography, is eliminating passwords entirely. Early studies show passkeys deliver roughly 30% faster login and higher completion rates. In Open Banking contexts, OAuth 2.1 with Financial-grade API specs ensures third parties access bank data under uniform security, including mutual TLS and fine-grained consent controls.

Tokenization replaces sensitive data with surrogate values, enabling interoperability without exposing credentials. Visa’s token service has issued over 4 billion tokens, now exceeding physical cards in circulation. Tokenized transactions show 28% lower fraud rates and 3% higher approval rates for online purchases. Fewer false declines, fewer chargebacks, better customer experience.

PCI DSS provides baseline compliance, but tokenization is shifting the burden. Point-to-point encryption, network tokens, and biometric authentication have cut card-not-present fraud by 26% to 30% while improving authorization rates. Security is being built into the network itself, reducing breach risk and fostering trust in interconnected systems.

This technical layer, standardized messages, open APIs, strong authentication, and tokenization, creates the foundation. Transaction speeds move toward real-time. Reconciliation issues and conversion costs trend down. Interoperability no longer sacrifices security.

Layer Two: Network Connections

While technical standards are great, they only matter if networks actually connect.

The network layer is where domestic payment rails link into a cross-border mesh, turning isolated systems into an international web of instant payments.

The breakthrough came in 2021 when Singapore’s PayNow and Thailand’s PromptPay linked, creating the world’s first cross-border real-time payment connection. Residents of both countries can now send money using just mobile numbers, with funds moving in minutes instead of days.

The service supports transfers of about 1,000 Singapore dollars per transaction, covering typical retail remittances. By mid-2022, the corridor was processing over 65,000 cross-border transactions monthly, averaging $150 to $200 each. The cost plummeted from around 10% in fees and FX spread to roughly $4 or less, plus transparent FX markup.

This is the pattern: bilateral links between instant payment systems, cutting out correspondent banks and their fees. Malaysia, Indonesia, and other ASEAN countries are signing MOUs to replicate this region-wide. The ASEAN Payment Connectivity initiative now includes seven countries working toward a connected network.

Europe built similar infrastructure.

SEPA Instant Credit Transfer and the ECB’s TIPS platform enable euro instant payments across 36 countries in seconds. The ECB joined the BIS’s Project Nexus to explore linking Euro area systems with Asia-Pacific networks.

In North America, FedNow launched in 2023 to enable instant domestic dollar transfers, complementing the private RTP network. While FedNow and RTP aren’t directly linked yet, discussions continue about seamless payments when banks operate on different networks.

Africa and the Middle East have initiatives, too.

The African Union’s PAPSS connects African payment systems. The Arab Monetary Fund’s Buna platform links banks in over a dozen Middle East and North Africa markets for cross-currency real-time settlement.

The BIS Project Nexus represents a multilateral approach. Instead of one-to-one connections between every country pair, each country connects once to the Nexus gateway, which links to all others. In July 2024, the BIS announced Nexus had completed a comprehensive blueprint and is moving toward live implementation.

The first wave includes Singapore, Malaysia, Thailand, the Philippines, and India. Once live, this network could connect 1.7 billion people, enabling instant cross-border payments as easily as domestic ones. The design uses ISO 20022 messages and standardized APIs for directory lookup and FX quotes.

Participating central banks plan to set up a Nexus Scheme Organisation collectively owned by those central banks. This public-sector governance model will define common scheme rules, FX conversion processes, and dispute handling, aligning with G20 roadmap goals for enhanced cross-border payments.

The expected impact is huge.

Interlinking domestic systems can make cross-border payments settle within one minute. Because many instant payment systems charge very low fees domestically, often just cents, connecting them can drive cross-border costs toward near-zero aside from FX. That’s a far cry from $30 to $50 wire fees or 7% remittance charges on a $200 transfer.

This directly supports UN SDG and G20 targets of reducing remittance costs to under 3% by 2030.

Multi-CBDC platforms represent another revolutionary development.

Projects like Dunbar and mBridge explore using digital currencies issued by central banks on shared ledgers to enable instant cross-border, cross-currency payments.

In late 2022, Project mBridge reached a pilot stage where 20 commercial banks from four jurisdictions conducted over 160 payment and FX transactions totaling around $22 million using prototype CBDCs. Banks could directly exchange value in different CBDCs simultaneously with finality, without intermediary correspondent banks.

The promise is drastic cuts in FX costs and settlement risk. Instead of currency conversions hopping through USD and correspondent networks with hefty spreads and delays, two CBDCs on one ledger can be swapped in real time using payment-versus-payment settlement to eliminate FX risk.

Multi-CBDC platforms aim to compress the estimated $120 billion in total fees incurred on $23.5 trillion in cross-border transfers. But these new rails raise governance questions.

• Who operates the shared platform?

• How are decisions made among central banks?

Project Dunbar’s reports propose shared governance and legal frameworks to tackle jurisdictional finality and compliance.

Network interlinking is accelerating. At least half a dozen bilateral fast-payment links are live, and multi-link frameworks like ASEAN Payment Connectivity now count seven countries in pacts to connect networks. Where links are operational, most retail cross-border payments complete within seconds to a few minutes, compared to one to three days via traditional correspondent banking.

Costs are dropping.

Thailand reported that average costs of small remittances via PromptPay-PayNow fell to well under 1% of transfer value in many cases. Some corridors already meet the sub-3% cost target when using mobile money or instant payment links. Malaysia-to-Thailand through linked QR codes reportedly costs around 2% or less.

Challenges remain, particularly around policy and regulation.

Data localization requirements in countries like India, Russia, and China mean cross-border infrastructure must navigate legal restrictions on where data can reside and how it’s shared. This can necessitate local processing or regulatory approval to send information abroad, adding friction.

Differences in anti-money laundering and counter-terrorism financing rules and sanctions lists create compliance hurdles. Some interlink projects build compliance features in. The BIS Nexus blueprint includes pre-validation to check that sender and receiver details meet all involved countries’ requirements before the payment is sent.

KYC portability remains largely unresolved.

Each bank and country tends to require its own due diligence, causing repeated friction for users and higher costs for providers. The World Bank has proposed a Payments Identity Credential that packages verified identity and account info as a verifiable credential accepted across providers. Some regions like the EU with eIDAS or India with digital ID frameworks are moving toward portable digital identities.

Governance and coordination are major themes.

Cross-border networks involve multiple authorities, so deciding on governance models is key. ASEAN links are driven by central bank agreements. Networks like Visa and Mastercard remain privately governed. Project Nexus proposes a central bank-owned entity. Each model has trade-offs in openness, innovation, and resilience.

Global bodies are facilitating cooperation.

The BIS, IMF, World Bank, and G20 working groups provide frameworks and monitor progress. The BIS CPMI published harmonized ISO 20022 data requirements to ensure new links speak a common language for key data like addresses and identifiers, minimizing truncation or misinterpretation across borders.

The network layer is rapidly evolving from a hub-and-spoke world dominated by a few centers to a network-of-networks model where domestic real-time systems, regional hubs, and digital currency platforms interconnect. This promises faster, cheaper, more accessible global payments, but requires tackling regulatory differences and ensuring robust multilateral governance.

Layer Three: Commercial Integration

At the commercial layer, payment providers, merchants, and platforms integrate with this web of networks.

The challenge here is fragmentation.

Dozens of local payment methods and networks exist. Cards, bank transfers, mobile wallets, instant ACH, QR code schemes. Merchants historically needed separate connections for each.

The solution has been payment orchestration platforms and unified gateways that abstract away complexity.

Companies like Adyen, Stripe, and Worldpay, plus specialist orchestration layers like IXOPAY and Spreedly, offer single integrations to access 100-plus payment methods worldwide.

A merchant integrating with such a platform can instantly offer localized payment choices in each market. iDEAL in Netherlands, Boleto in Brazil, M-Pesa in Kenya, all without custom-building connections. This one-stop approach cuts development time and ensures consistent checkout flows across channels.

Adyen pioneered unified commerce, directly connecting to card networks and local schemes under its own licenses. A retailer like Spotify or McDonald’s can handle in-store card swipes and in-app payments through the same system. This reduces integration points and intermediaries, which Adyen notes can improve reliability and authorization rates by avoiding unnecessary routing steps.

One major benefit these platforms deliver is smart transaction routing and failover, which boosts authorization success and uptime. Traditional setups send all transactions through a single acquirer or processor. If that path has an outage or poor approval rates for certain cards, the merchant is stuck.

Modern orchestration uses intelligent routing rules and machine learning to dynamically route each payment to the optimal provider in real time.

A payment from a US customer on a European website can be routed through a US-based acquiring partner to leverage domestic processing and increase approval chances.

By analyzing issuer and acquirer performance and routing accordingly, merchants have seen overall approval rates increase by 10% to 15% on average. In specific cases, gains can be higher. A subscription merchant resolved a persistent 20% decline rate with a particular issuer by routing those transactions to an alternate acquirer with better issuer connections.

When failures occur, the system can automatically retry or cascade the payment through another route. If Acquirer A returns a generic decline, the platform can immediately reroute the authorization to Acquirer B without the customer noticing. This approach has been shown to recover 20% to 25% of transactions that would have failed on the first attempt.

With optimized retry timing, merchants can potentially recover up to 30% of initially failed payments. These improvements translate to real revenue lift. For subscription businesses, involuntary churn due to payment failures is a silent killer. Studies by Stripe indicate 20% to 40% of total churn in subscription models can be caused by failed payments. Smart routing directly attacks this issue.

Another advantage is cost optimization.

Different payment rails come with different cost structures. Routing a debit card transaction over a domestic debit network might have lower interchange than the Visa/Mastercard network. Large platforms analyze these differentials and route transactions to minimize fees while clearing the payment.

Adyen introduced intelligent routing for US debit cards that decides in real time whether to send a payment via PIN debit networks or as a Visa/Mastercard debit transaction. This optimization yielded about 26% cost savings on average for those transactions while actually raising approval rates slightly.

Beyond interchange, orchestration can steer transactions to processors offering better volume discounts or lower FX fees. It prevents duplicate charges. By consolidating payment flows, merchants avoid maintaining redundant gateways, each with monthly fees or minimums.

On the reconciliation side, having a unified platform means a merchant gets one consolidated report or data feed for all transactions across methods. This dramatically cuts back-office workload. A marketplace accepting ten forms of payment in 50 countries gets one normalized settlement file instead of reconciling 500 different reports.

Automation here can reduce operational costs by over 20%. Faster reconciliation means merchants free up working capital sooner and have better visibility into cash flows.

These platforms also leverage tokenization and vaulting commercially to improve user experience and security. When a customer enters a card or bank account once, the PSP tokenizes it and stores it in a secure vault. That token can then be used for one-click checkouts, recurring billing, or multi-merchant wallet experiences.

The commercial impact is higher conversion and retention. Customers don’t have to re-enter details, reducing drop-off. Merchants can offer smooth saved-card checkouts globally. Because these tokens are often network tokens for cards or use schemes like Apple/Google Pay, fraud rates are significantly lower.

Using an external vault and tokenization shifts much of the PCI DSS compliance burden to the platform. A merchant doesn’t handle raw PANs, so their environment can be PCI-light, saving on audit and security costs. Many large merchants have seen fraud as a percent of sales drop into basis points after adopting advanced fraud tools and tokenization from PSPs.

New market entrants and networks are being aggregated by these platforms, opening commerce in regions previously hard to reach. Providers like MFS Africa and Thunes act as network-agnostic gateways connecting disparate financial systems across Africa, Asia, and beyond.

MFS Africa’s hub connects over 35 African countries and hundreds of millions of mobile wallet users through one API. A merchant or fintech integrating into MFS Africa can reach users of MTN Mobile Money, M-Pesa, Orange Money, and many others without separate deals. MFS Africa reportedly connects over 400 million mobile wallets.

Thunes enables cross-border payments into bank accounts and wallets in 130-plus countries with support for 80-plus currencies. Thunes claims its network can directly reach over 7 billion accounts and mobile wallets worldwide through partnerships. These aggregators turn fragmented last-mile networks into a more interoperable mesh.

Fintech services like Wise, Remitly, and PayPal plug in and deliver funds to a mobile money wallet in rural Kenya or a bank in Nepal as easily as to a US checking account. Transactions through fintech aggregators often arrive in minutes to emerging market destinations that used to take days. Wise leverages local instant payment systems and its own network to charge an average of only around 0.6% in fees on cross-border transfers, a fraction of the 5% to 7% traditional players charge.

Barriers persist.

Many local payment methods have unique integration quirks or regulatory requirements. India’s UPI requires local entity setup for certain high-volume use. Some countries require data localization for payment data. Fragmented APIs mean orchestration platforms must constantly maintain and update connections to hundreds of third-party systems, each with their own downtime or format changes.

Inconsistent settlement timing and rules add complexity. A merchant selling across borders might get paid instantly for some transactions but wait three days for others. Refund and chargeback processes vary widely between card networks and mobile money schemes.

The commercial layer is about hiding the seams from end-users, both merchants and consumers. By doing so, it drives better economics, higher conversion, and lower cost, and expands the reach of digital payments. Companies like Adyen and Stripe each process around $1.3 to $1.4 trillion annually in total payment volume, equivalent to 1% to 1.5% of global GDP each. Their scale and growth underscore how valuable interoperability at the commercial layer has become.

Looking ahead, we can expect more interchange harmonization. Initiatives to route payments through lower-cost real-time payment rails instead of high-cost card networks when appropriate are already happening in Brazil with Pix for e-commerce and are likely to spread. The commercial winners will be those who can present a unified, easy payment experience while orchestrating across an ever-expanding array of rails.

Layer Four: Strategic Control

At the strategic layer, the questions go beyond technology into who owns and governs payment networks and how that balance of power is shifting globally.

For decades, control of international payment rails was highly concentrated.

Visa and Mastercard form a duopoly in global card payments, accounting for about 90% of card transactions outside China and roughly 45% including China’s UnionPay by value. In cross-border interbank payments, the SWIFT network and correspondent banks, mostly large US, European, and Japanese banks, have dominated.

This centralization has raised concentration risks.

SWIFT data show that from 2012 to 2018, the number of active correspondent banking relationships worldwide dropped by about 20%, even as cross-border volumes rose. Fewer correspondent banks handle more flows, meaning any disruption or decision by those banks can have systemic impact.

On the retail side, a handful of large money transfer operators plus card networks process the majority of remittances and international consumer payments. Globally, just three companies, Visa, UnionPay, and Mastercard, process about 97% of all card-based payment volumes. This concentration has historically led to high fees and limited bargaining power for smaller countries or banks. It also introduces geopolitical risk.

We’re now seeing power shifts and diversification of rails as regions and new actors build their own capabilities. One trend is the rise of regional payment networks backed by coalitions of regulators and local banks. In ASEAN, central banks are interconnecting domestic systems and considering a broader network via BIS Nexus.

This is a strategic move to reduce reliance on Western networks for intra-Asia commerce. If Southeast Asian countries can route payments to each other directly through Nexus or bilateral links, they bypass intermediate correspondent banks and can transact in local currencies.

India has been aggressively promoting international use of UPI and its RuPay card scheme to lessen dependence on Visa/Mastercard. India’s RBI entered into agreements with Singapore to connect UPI with PayNow and is in talks with the UAE, France, and others to allow UPI at the point of sale abroad. These moves position RBI as an exporter of standards and show public-sector assertion of influence in payments.

In Latin America, Brazil’s Pix is another example of local rail dominance that shifts strategic control. In just a few years, Pix amassed over 140 million users and by 2024 was processing 64 billion transactions annually, making its volume 80% higher than combined credit and debit card transactions in Brazil. Pix now accounts for close to 40% of all e-commerce payments in Brazil, surpassing cards as the most used method.

Brazilian authorities are working on enabling cross-border Pix usage. Regionally, there’s talk of linking Pix with similar instant systems planned in neighbors, which could carve out a Latin America network less reliant on US-based rails.

The GCC has a similar initiative.

The ARPS/Buna system by the Arab Monetary Fund aims to make intra-Arab cross-border payments in local currencies without always converting to USD. Roughly a dozen Arab and African currencies are live or in testing on Buna, shifting more regional trade to a network governed within the region.

Parallel to public-sector efforts, global card schemes and big tech players are leveraging their own networks. Visa Direct and Mastercard Send repurpose card infrastructure to push funds to accounts globally. These services provide reach into billions of card accounts. Visa Direct notably partnered with fintechs to facilitate transfers to over 170 countries using Visa network rails.

This scheme-driven model means Visa/Mastercard set the rules, but they often collaborate with local networks. Visa Direct connects with MFS Africa to reach mobile money wallets. The card giants are defending market share from emerging real-time networks and fintech connectors.

Then we have fintech alliances and cross-border specialists like Thunes, MFS Africa, Wise, Nium, and TerraPay. These firms partner with each other and with incumbent players, forming a web of bilateral agreements that in aggregate rival the reach of traditional networks. Thunes and Nium both have deals to let banks access their networks through existing systems.

One notable collaboration allows banks to route payments through Thunes using their familiar SWIFT interface, bridging old and new rails. These fintech networks are becoming integral to the global payments ecosystem. They operate somewhat like private consortia. While they may not have the formal standard-setting clout of BIS or Visa, they set de facto standards in how to integrate mobile money or do real-time compliance checks for cross-border wallets.

This diversification leads to a more multipolar governance landscape.

We now have regulators and central banks collaborating on schemes that prioritize public goods like inclusion, low cost, and local currency usage. We have global private networks extending influence in new flows, prioritizing broad acceptance and shareholder interests. And we have fintech-led networks prioritizing innovation speed and niche solutions, governed by commercial contracts and tech standards rather than international treaties.

A key strategic consideration is concentration risk and systemic resilience. While network layer changes aim to reduce reliance on any single corridor or provider, there’s a risk that new concentration points form. If most of sub-Saharan Africa’s cross-border retail payments flow through one hub and one or two correspondent banks, that hub becomes systemically important.

The concentration in correspondent banking has been worrying. Over the last decade, many smaller countries lost correspondent relationships, consolidating flows through just a couple of global banks. This has pushed countries to seek alternatives, like joining regional payment unions or considering cryptocurrency-based solutions.

Too much fragmentation without interoperability could also hurt efficiency. This is where standard-setting bodies like the BIS, IMF, and G20 come in. They’re promoting interoperability standards so new rails can interconnect rather than form silos. The BIS’s work on common ISO 20022 usage, legal entity identifiers, and API standards ensures new networks speak common languages.

We’re also witnessing power shifts in transaction currency and settlement. One strategic dimension is the ability to transact directly in local currencies. Historically, a huge share of cross-border payments involving emerging markets would be routed through USD or EUR as intermediary vehicle currencies. This gives the US and EU outsized influence over global flows.

With new networks, there’s an effort to enable more direct currency pairs. Project mBridge envisions direct CBDC swaps between Chinese RMB and Thai Baht without touching USD. Regional systems like PAPSS aim to let Nigerian Naira convert to Ghanaian Cedi through multilateral platforms rather than via USD.

If successful at scale, this could slightly reduce the dominance of major currencies in trade and finance, shifting some power back to regional blocs. The dollar and euro aren’t disappearing. Their networks are being modernized, and they remain deeply entrenched. But the strategic calculus for many countries now includes developing or joining alternative payment routes for diversification and autonomy.

Governance models vary.

In scheme-driven models like Visa/Mastercard or SWIFT, governance is largely in private hands with participating banks as members but rules set by the central entity. Public-sector models rely on cooperative governance, often slower but with direct sovereign oversight. Fintech-led models might be governed by a lead firm but are subject to patchwork local regulations where they operate.

One emerging trend is public-private partnerships in governance. For example, the Monetary Authority of Singapore and Temasek worked with JPMorgan on Project Ubin, a prototype cross-border DLT network, mixing central bank and private bank expertise.

From a quantitative perspective, one can gauge power shifts by looking at volumes. The share of cross-border retail payments going through closed-loop fintechs or local networks is rising. Wise now moves over £9 billion per quarter outside traditional bank wires. In Asia, the PromptPay-PayNow link handled over $1 billion in its first full year, and that’s just two countries.

If ASEAN’s five main economies link up fully, we could see tens of billions annually flowing outside old correspondent channels with fees under 3%. On the corporate side, multi-bank platforms like Kyriba or J.P. Morgan’s Liink enable corporates to do cross-border transfers or FX internally without always using correspondent networks.

Over time, if even 20% of cross-border volume shifts to new rails with lower costs, that puts competitive and fee pressure on incumbents. SWIFT gpi was partly a response to upstart competition, focusing on speed and transparency.

Regulators will need to ensure interoperability doesn’t lead to new silos or weak links. One can foresee frameworks where regional hubs interoperate via agreed standards under BIS coordination, a network-of-networks governance approach. The Financial Stability Board has been monitoring G20 Cross-Border Payments Roadmap progress and recognizes missing targets is a possibility. If voluntary industry action isn’t sufficient, more direct regulatory interventions could come.

Already, the EU has effectively mandated that all banks reachable by SEPA must also be reachable by SEPA Instant to push instant cross-border euro usage. We may see similar mandates or incentive structures to force interoperability.

The strategic chessboard of payments now involves central banks from emerging markets as important pieces, big tech companies offering payment services, and new entrants like stablecoin or crypto networks vying for a role.

The strategic layer is characterized by a shift from a unipolar or bipolar model dominated by a few Western networks to a more multipolar and regionalized model. Governance is correspondingly shifting. Regulators and multinational bodies are asserting more influence by creating public infrastructures and setting standards. Schemes are adapting to new use cases and working more with local networks. Fintech alliances are emerging as a third force connecting the unconnected and forcing innovation.

Metrics like concentration of flows will be key to watch. The aim is to see those percentages come down, indicating a healthier, more competitive ecosystem. Already, we see early signs. The top five correspondent banking banks’ share of FX flows has started to inch down as regional corridors develop alternatives. The global average cost of remittances has modestly fallen from around 7% a few years ago to 6.3% in 2024.

Power is by no means completely redistributed. Visa and Mastercard still each processed over $14 trillion in payment volume in 2022. But the seeds of change are planted. The coming years will likely bring a new balance where no single player holds all the cards. Instead, interoperability and shared governance, whether via central bank collaboration or industry consortium, will define how the hidden architecture of global payments evolves to be more inclusive, resilient, and efficient.

What This Means for You

If you’re building or operating in payments, interoperability isn’t background infrastructure you can ignore. It’s reshaping competitive dynamics across every layer of the stack.

At the technical layer, supporting modern protocols becomes essential.

ISO 20022 migration isn’t optional if you process cross-border payments. Your systems need to handle richer data, automated reconciliation, and seamless API connectivity. The firms that retrofitted legacy infrastructure early are capturing efficiency gains now. The ones still running ISO 8583 messages are explaining to clients why their transactions take longer and cost more.

At the network layer, the question is which rails you connect to and how.

If you’re a PSP serving merchants in Southeast Asia, are you building direct connections to UPI, PromptPay, and PayNow? Or are you routing everything through card networks and eating the interchange? If you’re a bank, are you joining Nexus when it goes live, or waiting to see if it works?

Early movers get preferred fee schedules and influence over technical specs. Late movers pay more and adapt to standards others designed.

At the commercial layer, orchestration capability determines whether you keep merchants or lose them.

If you can’t offer intelligent routing that lifts authorization rates by 10%, someone else will. If you can’t support 50 payment methods through one integration, merchants will consolidate with providers who can.

The winners here are companies that abstract complexity while maintaining performance. The losers are single-rail processors without orchestration capability or global reach.

At the strategic layer, the choice is whether to build rails, integrate with rails, or aggregate across rails.

Building gives you control but requires massive capital. Integrating gives you speed but creates dependency. Aggregating gives you flexibility but increases technical complexity.

What matters is choosing deliberately rather than drifting. The infrastructure being built now will define payment flows for the next decade. The companies influencing protocol design and contributing to standards bodies will shape the rules everyone else follows.

Interoperability isn’t about making everything compatible for the sake of it. It’s about reducing friction that destroys value. Every translation layer, every manual repair, every delayed settlement, every declined transaction that should have succeeded costs someone money.

The firms capturing value are the ones eliminating friction at scale. That’s what ISO 20022 does for messaging. That’s what Nexus does for cross-border real-time payments. That’s what orchestration platforms do for merchant integration.

The technical details matter less than understanding the pattern. Standardize the boring parts so you can differentiate on the valuable parts. Make the plumbing invisible so users see seamless experiences.

That’s what interoperability actually accomplishes.

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