Partial Capture

Partial capture is the process of collecting only part of the amount that a card issuer has authorised. A merchant obtains an authorisation for a certain amount, then later submits a capture for a smaller amount because the final charge is lower than expected. The remaining, uncaptured portion of the authorisation is released back to the cardholder. Online retailers, marketplaces, hotels, car rental firms and food delivery services use partial capture regularly.

Partial capture depends on separating authorisation from capture. In a single-message or immediate-capture payment, the sale is completed at once for the authorised amount. In a dual-message flow, the merchant first places an authorisation hold and then performs a separate payment capture, often hours or days later, which is when partial capture becomes possible. It should not be confused with partial approval, where the issuer approves less than the merchant requested.

A typical online example shows the steps. A customer orders five items worth 100 units of currency. The merchant requests and receives an authorisation for 100. When the warehouse prepares the order, it finds that one item worth 20 is out of stock. Instead of charging the full 100 and refunding 20, the merchant captures 80 through its payment gateway. The issuer posts a charge of 80 to the cardholder's account, and the hold on the other 20 is released, either automatically or because the merchant sends a reversal for it.

Many payment systems also support multiple capture, where an authorisation is collected in several parts as items ship. In that case, each shipment produces a capture, and the final one closes the authorisation.

• E-commerce fulfilment. Charging only for goods actually shipped when some items are unavailable or substituted.
• Grocery and delivery. Authorising an estimated amount and capturing the final total once weighed or substituted items are known.
• Hospitality and car rental. Authorising an estimated stay or rental and capturing the actual charges at check-out or return, if they are lower.
• Marketplaces. Capturing only the parts of a basket that each seller confirms.
• Tips and adjustments. In some sectors, the final amount after adjustments differs from the original estimate, within limits set by card network rules.

When the final amount is higher than the authorisation, the merchant generally needs an incremental authorisation or a new authorisation instead, because card network rules limit how far a capture may exceed the approved amount.

Captures must be submitted before the authorisation lapses. Each network sets validity periods that depend on the transaction type and merchant category, described under authorisation expiry. A capture submitted after expiry may be declined, may attract higher fees or may be disputed by the cardholder. Networks also expect merchants to release unused authorisation amounts promptly, so that customers do not lose access to funds that will never be charged. Some providers do this automatically when a partial capture is submitted; others require the merchant to send a reversal for the remainder.

For cards with delayed capture arrangements, such as hotel bookings, specific network rules govern how estimates are authorised and how final amounts are captured.

Partial capture offers a better customer experience than charging in full and then refunding. The cardholder sees only the correct charge on the statement, the merchant avoids paying fees on a partial refund, and disputes over amounts are less likely. It also helps reconciliation, because the captured amount matches what was actually sold, and it avoids the delays of refunds, which can take several days to reach the customer. For merchants with high order volumes, these savings in fees, customer service time and disputes can be significant over a year.

If merchants do not release the uncaptured portion, cardholders may see holds on their accounts for days, which can push low-balance customers into declines or overdrafts and lead to complaints. Not every acquirer, card type or local payment method supports partial capture; some debit networks and alternative payment methods require full capture or a refund. Fees can apply per capture, especially when one authorisation is captured several times, and some processors charge a capture fee. Merchants must also design their systems carefully so that the order management, payment and accounting records all show the same captured amount, preventing mismatches in the settlement amount.