Reserve Account

A reserve account is money an acquirer or payment provider withholds from a merchant's settlements and holds against future chargebacks, refunds and fines — typically a rolling percentage of volume held for a period, or a fixed sum — released when the risk has passed. It is the acquirer's collateral for the credit it extends to every merchant that takes payment before it delivers.

Fraud & risk · 2 min read · 10 August 2026

Also known as
Merchant reserve, Rolling reserve, Holdback, Capped reserve
Used at
merchant onboarding for higher-risk sectors, and after a merchant's chargeback ratio rises
Rolling reserve
5–15% of each day's settlements, held 90–180 days, released on a rolling basis
Fixed reserve
a set amount, often one to three months of expected chargebacks, held until termination plus 120–180 days
Whose money
the merchant's, on the acquirer's balance sheet as a liability
In a deal
reserves are neither the acquirer's cash nor its working capital, and the adequacy of reserves against the risk is a diligence question

How a reserve account works in practice

An acquirer pays a merchant today for a sale the cardholder can reverse for four months. If the merchant delivers, nobody notices the credit; if the merchant fails — a tour operator, a furniture retailer taking deposits, a subscription service that folds — every unfulfilled sale comes back as a chargeback and the acquirer pays it. The reserve is how the acquirer stays whole: it settles the merchant 90% of each day's takings and holds 10% for 180 days, so that at any moment it is holding roughly half of the volume a failure would reverse.

The percentage and the period follow the delivery gap and the merchant's history. A restaurant, paid on delivery, needs no reserve; an airline selling seats for next summer might see 20%. A merchant in a network monitoring programme will find its reserve raised, because the acquirer's exposure to fines has risen with it. The reserve is the merchant's money — it earns nothing, and the merchant feels it as a working-capital cost — which is why merchants shop acquirers on reserve terms as much as on price.

For a buyer of an acquiring business the reserves are two things at once. On the balance sheet they are a liability that must be excluded from the price bridge, with the matching cash: neither is the company's. In the risk model they are the question of whether they are enough — a €2.4m reserve against twelve merchants with €40m of undelivered sales is not — and the answer is priced in an indemnity.

Example

An acquirer onboards an online travel agency selling €5m of holidays a month for delivery up to six months ahead. It sets a rolling reserve of 12% held for 180 days, which builds to about €3.6m — roughly the chargebacks it would face if the agency collapsed with two months of undelivered bookings. Eighteen months later the agency fails; €2.9m of chargebacks arrive over four months, the reserve absorbs them, and the acquirer's loss is nil. Its competitor, which had won the same agency's second contract on a 3% reserve, loses €1.1m.

Common mistakes

- Counting merchant reserves as the acquirer's cash in a valuation. - A reserve sized on chargeback history for a merchant whose delivery gap has lengthened. - Releasing the reserve on termination instead of 120–180 days after it, when the last chargebacks arrive. - Merchants who accept a reserve without an agreed release schedule. - Confusing a reserve with escrow: one is collateral held by a counterparty, the other is deal money held by a neutral agent.

Related terms

Written by , M&A FinTech Expert.

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