What Are A2A Payments?
The sending and receiving accounts may belong to different people or businesses, or to the same owner. Common examples include merchant payments, invoice payments, payroll, supplier transfers, direct debits, person-to-person transfers, and moving money between a customer’s own accounts.
The underlying infrastructure varies by market. Examples include ACH in the United States, Faster Payments in the United Kingdom, and SEPA Credit Transfer, SEPA Instant Credit Transfer, and SEPA Direct Debit in Europe. These schemes use different processing cycles, participation rules, return mechanisms, and settlement arrangements.
How A2A Payments Are Initiated
The main distinction is between push and pull models:
In a push credit transfer, the payer instructs a bank or payment provider to send funds to the beneficiary. Most instant-payment schemes use a push model.
In a pull-based debit, the payee or originator submits a debit under a mandate or authorization previously given by the payer. Direct debits and some ACH debit flows work this way.
A standing or recurring instruction allows payments to be initiated under an established schedule, mandate, or consent arrangement.
Once validated, the instruction enters the clearing and settlement process used by the relevant scheme. Some payments are handled individually in real time; others are exchanged in files and settled during scheduled windows.
Where Open Banking Fits
Open banking can provide the customer-consent and initiation layer for an A2A payment, but it is not itself the payment rail. In a payment-initiation flow, a regulated third-party provider directs the customer through the bank’s authentication process and sends the instruction with the customer’s consent. The funds then move over the applicable bank-transfer or instant-payment infrastructure.
Not every A2A payment is an open-banking payment. Traditional bank transfers, direct debits, payroll files, and standing orders are also account-to-account flows.
A2A Payments Compared with Cards
Card payments involve issuer authorization, acquiring, card-scheme clearing, and card settlement. A2A payments follow the rules of the relevant account-based scheme. Card-scheme chargebacks do not apply to A2A rails, but returns, recalls, statutory refunds, reimbursement rights, and merchant-issued refunds may still exist.
For merchants, the practical questions are scheme specific: when is the payment confirmed, when is settlement final, what payer protections apply, how are refunds handled, and when does the PSP make funds available? A2A may offer faster availability or lower cost in some markets, but neither benefit should be assumed without checking the rail and commercial setup.
