The Direct Path Forward: Why B2B Businesses Are Turning to A2A Payments

B2B businesses in the US are among the most sophisticated operators in the world, yet most still rely heavily on card networks and fragmented bank transfers designed for a different era. For high-value invoices, recurring billing, and international transactions, percentage-based card fees quietly compound.

Credit cards were never designed for B2B — they just adapted to them. And in a market where margins matter, that friction is no longer acceptable.

A Structural Shift in How Money Moves

Account-to-Account (A2A) payments represent more than an alternative payment method. They’re a structural shift.

Instead of routing payments through card networks or layered intermediaries, A2A connects bank accounts directly. Funds move from payer to recipient through banking infrastructure, often via local rails. This translates into:

• Lower processing costs on high-ticket transactions

• Faster, more predictable settlement

• Cleaner reconciliation between payments and invoices

Adoption of A2A payments isn’t just accelerating, it’s becoming increasingly necessary. B2B businesses across Europe, Asia-Pacific, and parts of Latin America have already embraced real-time bank transfer infrastructure as a primary payment method – with A2A payments accounting for more than 50% of total payment volume (TPV) in many of these regions. In the US, by contrast, real-time payments still represent just 1.5% of TPV – a rounding error in a country that processes trillions of dollars annually. With A2A transaction value projected to grow from $1.7T in 2024 to $5.7T by 2029, the US market is catching up, but not quickly enough.

The Margin Imperative

A2A payments offer advantages across many contexts, and in B2B they become genuinely structural. The economics are straightforward: card fees are percentage-based, and B2B transactions are large. Traditional card acceptance fees typically run between 2.0% and 3.5%, whereas the cost of an A2A transaction may be a fixed fee of just 40 to 50 cents per API call. On a $50,000 invoice, that means $1,500 is lost to a card network on a single payment. At B2B scale, this is a structural margin problem, not just a processing cost. For US businesses processing high-value invoices and cross-border transactions, even small percentage differences have a meaningful impact on overall unit economics.

And the fee line is only the most visible problem. The real cost is compounded by fraud losses and chargeback overhead, the working capital cost of waiting two to three days for card settlements to clear, and the acute reconciliation burden in B2B. Unlike consumer payments, B2B transactions are usually required to reference a purchase order. Card transactions arrive stripped of the structured data finance teams need to match payments to invoices, adding yet another hidden labor cost that scales with volume. A2A rails carry rich payment data alongside the transaction itself, enabling automated reconciliation and direct ERP integration.

Beyond processing costs, payment failure is a major source of revenue leakage. In the subscription economy alone, losses are projected to reach $138 billion in 2025 due to expired cards and authentication friction. These are inherent issues in card-based systems, where payment credentials degrade over time. A bank account linked once remains valid indefinitely, reducing the credential churn that silently erodes revenue in card-dependent billing models. For platforms that collect and disburse payments on behalf of others – marketplaces, SaaS platforms, vertical software businesses – every basis point saved flows directly to the bottom line.

Shifting eligible flows from card networks to A2A rails doesn't just reduce fees. At scale, that difference is not incremental – it is transformative.

How Airwallex enables A2A at global scale

While the case for A2A is clear, execution is where most businesses face challenges.

Bank transfer infrastructure is fragmented across markets. Local rails operate differently. Settlement behaviors vary. Reconciliation across systems becomes complex. And integrating multiple providers quickly reintroduces the very fragmentation A2A is meant to solve.

Airwallex addresses this at the infrastructure level.

The fragmentation that makes bank transfers operationally painful is removed by standardizing how payments are structured, reconciled, and integrated into existing payment flows. Each payment is tied to a defined context – whether at the payer or invoice level – enabling automatic reconciliation, real-time payment status updates, and seamless integration into existing billing and finance systems.

From there, businesses can intelligently route eligible payments away from high-cost card networks and onto A2A rails where appropriate. On high-value B2B transactions in particular, this shift can protect up to 3% in margin per payment.

With coverage of 25+ A2A payment methods globally, and a leading bank transfer infrastructure spanning multiple currencies and markets, Airwallex enables B2B businesses to adopt A2A payments without rebuilding their payment stack each time.

The next phase of B2B payments

As US B2B businesses continue to expand globally, the inefficiencies of legacy payment systems become harder to absorb. Margins tighten. And the demand for real-time, cross-border financial infrastructure grows.

A2A payments are not a replacement for every existing rail. Cards and alternative methods will continue to play a role. But for high-value, repeatable, and cross-border B2B flows, A2A is emerging as a critical component of modern payment stacks that route the right transactions through the most efficient rails. Businesses that embrace A2A now won’t just reduce costs — they’ll build stronger unit economics, better customer experiences, and more scalable financial operations.

The next generation of B2B leaders won’t see payments as an afterthought.

They’ll use them as a competitive advantage.