---
title: "Reserve Account"
url: "https://mahouse.world/glossary/reserve-account"
type: "glossary term"
topic: "Fraud & risk"
author: "Ihor Vlasov"
reviewed: "2026-09-20"
published: "2026-08-10"
---

# 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.

**Also known as:** Merchant reserve, Rolling reserve, Holdback, Capped reserve

## Key facts

- **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

- [Chargeback](https://mahouse.world/glossary/chargeback.md)
- [Card Network](https://mahouse.world/glossary/card-network.md)
- [Escrow](https://mahouse.world/glossary/escrow.md)
- [E-Money](https://mahouse.world/glossary/e-money.md)
- [Decline Rate](https://mahouse.world/glossary/decline-rate.md)
- [Working Capital Adjustment](https://mahouse.world/glossary/working-capital-adjustment.md)

— Ihor Vlasov, M&A FinTech Expert. Last reviewed 2026-09-20. https://mahouse.world/authors/ihor-vlasov