Reserve Account

A reserve account is an account, or a ledger balance, in which a bank, card acquirer, payment processor or other financial partner holds back part of a client's funds as security against future losses. The money still belongs economically to the client, typically a merchant or a payment firm, but it is not available to spend while the reserve is in place. It is released according to an agreed schedule or when the risk it covers has passed.

Reserves are most common in card acquiring, where a merchant's sales may later be reversed through chargebacks and refunds months after the money was paid out. They are also used by banks providing settlement services to payment firms, by marketplace and platform operators, and in some lending and escrow arrangements.

When an acquirer settles card sales to a merchant, it takes on liability for those transactions toward the card networks. If a cardholder later disputes a purchase and wins, the acquirer must return the money to the issuer; it then tries to recover it from the merchant. If the merchant has gone out of business, has no funds or has committed fraud, the acquirer bears the loss. The risk is greatest where goods or services are delivered long after payment, such as travel, event tickets, subscriptions and pre-orders, or where the merchant is classed as a high-risk merchant. A reserve gives the acquirer funds it can draw on without having to chase the merchant.

A payment facilitator that onboards sub-merchants under its own acquiring relationship faces the same exposure and typically imposes reserves on its own sub-merchants, while also being subject to reserves from its acquirer.

• Rolling reserve: a percentage of each day's settlement, often 5% to 10%, is withheld and released after a fixed period, commonly 90 or 180 days. At any time, the reserve equals the withheld portion of the most recent period's sales.
• Fixed or up-front reserve: a lump sum is deposited or withheld at the start of the relationship and kept for its duration, or until the merchant has built a track record.
• Capped reserve: a percentage is withheld from settlements until a target amount is reached, after which full settlement resumes.
• Delayed settlement: instead of a separate reserve, the acquirer simply extends the time before paying out, achieving a similar effect.

An online travel agency processes USD 1,000,000 a month in card sales and its acquirer imposes a 10% rolling reserve held for 180 days. Each month USD 100,000 is withheld. After six months the reserve reaches about USD 600,000; from the seventh month, each month's new withholding is matched by the release of the amount withheld six months earlier, so the balance stays near USD 600,000 while volumes are steady. If the agency closes, the acquirer can use that balance to pay chargebacks from customers whose trips were cancelled.

Outside card acquiring, a bank that provides accounts or settlement to a money transmitter or fintech may require a reserve to cover returned payments, ACH returns, negative balances or fines. In cross-border payments, a payout partner may ask a sending firm to keep a reserve or prefunding balance as security. These arrangements resemble collateral and are governed by the commercial agreement, which should specify the amount, how it is calculated, when it can be drawn, and when and how it is released.

For the client, reserve balances are usually recorded as a receivable from the acquirer or partner, not as cash, because they are not freely available. Treasury teams must plan around them, since a large reserve can tie up a significant share of working capital and constrain liquidity management. A payment firm subject to safeguarding rules must also consider whether customer funds held in a partner's reserve are adequately protected, and include reserve balances in its reconciliation of what partners hold.

Reserves are a frequent source of conflict. Merchants may find a reserve imposed or increased with little notice after a spike in chargebacks, a change in business model or a review triggered by a card network monitoring program. If the acquirer itself fails, a merchant's reserve may be treated as an unsecured claim. Careful contract terms, monitoring of chargeback ratios and keeping documentation that supports dispute defenses all help merchants reduce the reserve they are asked to hold.