Wallet Interoperability Explained (2026 Guide)

Digital wallets are being rapidly adopted globally. As of 2024, digital wallets are used by 52.6% of the global population, with adoption projected to grow by a further 15.3% by 2029. This is a result of the ease it offers to merchants and customers in giving and receiving payments from a smartphone.

But fragmented ecosystems limit the transaction capacity of digital wallets. It also binds the merchants to a specific region. This makes wallet interoperability a need of the modern world. It widens the market access and helps businesses scale even in cross-border horizons.

With the help of this article, we bring more clarity into what wallet interoperability is and how it benefits your business.

Wallet interoperability is what allows wallets, payment systems and financial networks to interact with one another and transact with each other even if users are not on the same platform. This has made the payment experience convenient for customers and merchants alike. 

There are three most commonly used wallet-interoperability models. These are:  

Closed-loop wallets

Closed-loop wallets are merchant-specific digital wallets that allow payments only for the merchant’s products or services. (Eg, Starbucks). Users pre-load their wallets with money, but cannot use it on any other platform. 

Open-looped wallets

Unlike closed-loop wallets, open-loop wallets give users more versatility and choice in making payments. These wallets can be used for making payments to multiple services and merchants, given that they allow digital wallet payments.

Bank-linked wallets

As the name suggests, these wallets are linked directly to a user’s bank account. User does not have to pre-load it, as every payment is deducted directly from the bank account.

The growing need to make everything convenient demands an increase in wallet interoperability. It matters because of

Consumer convenience

Wallet interoperability is what allows customers to easily pay merchants and services without having to switch between transaction platforms. They can just use one digital wallet that they are most comfortable with for every payment. 

Merchant acceptance expansion

Merchant acceptance rate measures the number of payments approved. Interoperability reduces friction at checkout, lowering the risk of cart abandonment. Thus, expanding the payments approved to the merchant. 

Financial inclusion

The World Bank has been trying to make financial services accessible to the poorer sections of society. Digital financial services, such as e-wallets, have become a key driver of this change and of increased financial inclusion across emerging markets and developing economies. Regions with high smartphone penetration but a low traditional banking setup have shown increased access to financial services under this initiative.

Reduced transaction costs

Card payments and banks generally charge a processing fee for every transaction. This is especially inconvenient for small purchases. Interoperability reduces operational costs by sharing infrastructure between banks and digital wallets, enabling the same purchases at lower transaction costs. 

Cross-border scalability

Global interoperability makes it easy for small and medium-sized businesses to enter cross-border trade and markets. Their business scales and improves customer retention by enabling payments from multiple sources.

1. Domestic interoperability

Domestic interoperability refers to the ability of banks, payment service providers, and other financial institutions to offer a seamless payment experience within a nation's borders. In India, the Unified Payments Interface (UPI), launched by the National Payments Corporation of India in 2016, has greatly enhanced interoperability. With its inclusion, users can directly send or receive bank-to-bank transfers across multiple financial platforms using a QR code or a virtual payment address.

2. Cross-border interoperability

Cross-border interoperability is the ease with which transactions can be conducted between international financial institutions. This is enabled by multiple countries adopting Regional Payment Connectivity (RPC) to support low-cost, secure cross-border transactions by aligning their payment systems. 

In November 2022, five ASEAN central banks, those of Indonesia, Malaysia, the Philippines, Singapore, and Thailand, signed an MOU to enhance RPC efforts by standardizing QR payments. The membership has since expanded to nine ASEAN nations. Their payment systems have established bilateral and multilateral linkages that enable real-time currency conversions for consumers and businesses.

3. Bank-to-wallet interoperability

Bank-to-wallet interoperability refers to the integration of a bank’s internal data with a third-party platform using an open banking API. This enables these platforms to perform core banking functions for users, such as transferring funds, checking balances, and viewing transaction history.

Wallet interoperability becomes possible when several technical aspects work in sync. These are:

API standardization

API standardization means every wallet, bank, and financial institution follows the same set of protocols and rules for transactions with each other. This breaks silos that are associated with every entity using the custom API. It also ensures that every participant follows centralized framework for security and privacy when handling users' payment data

Common QR standards

A QR code is a machine-readable code that enables transactions by scanning it with a smartphone, often using a digital wallet. Interoperability is enhanced when every wallet uses a common QR standard rather than its own. This enables real-time transactions between different financial networks.

Payment rails

Payment rails are the infrastructure behind the movement of money. In transactions between different wallets, these rails dictate whether they support the financial network and currency involved in the transaction and how fast the settlement will take place. An example is India's UPI rails that support transactions between different wallets and payment systems within the national boundary. 

Clearing mechanism

The clearing mechanism reconciles and validates transaction details between wallets, banks, and financial institutions. This often involves assessing whether the payee has sufficient funds, the fraud risks and ensuring the exchange complies with regulations.

Messaging standards 

Adopting messaging standards like ISO 20022 makes cross-border interoperability easier. It harmonizes payment mechanisms by providing a consistent and structured standard for financial messages internationally. The Bank for International Settlements launched the Committee on Payment and Market Infrastructure for the wider adoption of ISO 20022 in cross-border payments.

Real-time payment networks have played a key role in expanding the interoperability between financial institutions. The need for instant fund transfer and settlements led to the development of payment systems with higher interoperability.

The NPCI UPI rails have established a seamless network for direct fund transfers between banks. Its integration within the wallet ecosystem has enabled funds to be transferred and settled in real time. TARGET Instant Payment System (TIPS) is yet another payment system that offers real-time transfers pan Europe.

Both these systems increase the efficiency of the payment network and enhance user experience. Unlike traditional banking, which processes payments only in business hours, these systems work 24*7 and even allow transferring smaller payment amounts directly between banks.

Central bank digital currency (CBDC) is a new form of flat currency that is being explored globally by central banks. It is a legal tender issued in digital form by the central banks. It is exchangeable one-to-one with flat currency.

The current digital payment ecosystem makes the issuance and distribution of CDBC a very convenient task. The potential of digital currency may not be realized as easily in the domestic economy, but it has a higher chance of success when cross-border payments are concerned.

Cross-border payments generally have multiple layers of intermediaries and compliance checks. This increases the time and cost of processing them. RBI, along with some Asian and European central banks, is actively exploring the option of interoperable CDBC frameworks.

The key challenge comes in participating players developing shared transaction rails. RBI has launched a pilot project rather than a full-scale one. It will help determine the growth potential and efficiency gains of CBDC in cross-border payments.

While the interoperability of digital wallets and payment systems has increased, it still faces certain challenges in implementation. These are

Regulatory fragmentation

Wallet interoperability efforts falter when there is a lack of a clear regulatory framework for collaboration between different financial institutions. Variation in compliance frameworks, such as KYC and AML, further slows transaction processing.

FX & cross-border settlement complexity

Navigating FX conversion rates, currency fluctuations, and intermediaries in cross-border payments leads to settlement delays.   

Security risks

The increased wallet interoperability also led the way for cybercriminals to use newer ways to access personal and financial data stored in digital wallets. Regular security audits have to be conducted to protect user data from such security risks.

The ease of adoption of any digital wallet is dependent on its security and compliance considerations. Closed-loop and open-loop wallets use the payment data of their user to transfer funds. Since they process cardholder data, they are automatically required to comply with PCI DSS requirements. They must use strong encryption standards for these transactions.

To further reduce security risks in interoperable systems, fraud and transaction monitoring should be implemented. Users should be encouraged to use strong passwords for their accounts and enable two-factor authentication to protect against fraudsters.

While open banking APIs give way to wider interoperability of different platforms, they must still comply with data localization laws for the data stored and passed between third-party payment providers.

The wide adoption of interoperable systems has given fintech and SaaS platforms greater access to markets. They can reach out to customers far beyond their immediate geographic region. 

For SaaS platforms that handle recurring billing across borders, interoperability reduces failed payments caused by unsupported wallet types, directly improving revenue retention. 

Fintech companies can also benefit from lower customer acquisition costs when their payment rails are already compatible with local wallets in a new market. This helps remove a major barrier to entry. 

Wallet interoperability also enables embedded finance use cases like pay-later options, insurance provisions, and investment products, to be distributed through wallet interfaces that users already trust. This way your SaaS or Fintech business can wide the commercial opportunity beyond pure payment processing.

The future of wallet interoperability seems to be moving toward growth beyond domestic boundaries. ASEAN countries have adopted Regional Payment Connectivity by standardizing their QR. It has significantly reduced the unnecessary steps that were previously involved in cross-border payments.

India is also advancing payments openness by partnering with several European and Central Asian countries to establish standardized rails for international payments. This will reduce the cost and time associated with international payment settlement.

Wallet interoperability will define the next phase of digital payments. It will play a major role in global market expansion by enabling seamless cross-border transactions. To achieve this, significant efforts need to be put in by the central banks and digital payment platforms to formulate standard rails for processing payments.

For businesses looking to operationalize wallet interoperability without the complexity of managing multiple payment integrations, Xflow offers a powerful solution. Xflow’s cross-border payment infrastructure connects businesses to a wide network of local payment rails and wallets across markets, enabling compliant, real-time payouts and collections in local currencies.

Try Xflow today!