Rolling Reserve

A rolling reserve is an arrangement in which an acquiring bank or payment service provider keeps back a fixed percentage of a merchant's card sales each day and releases each day's portion after a set holding period, such as 90 or 180 days. The money held covers chargebacks, refunds, fines and fees that the merchant might not be able to pay later. Because new money is added and old money is released every day, the reserve "rolls" forward.

A rolling reserve is the most common type of merchant reserve. Other types are an up-front (fixed) reserve funded in one go, and a capped reserve that stops growing at a set amount. A related but distinct tool is delayed settlement, in which the whole payout is postponed for a few days rather than a slice being held for months. Reserves are set in the merchant agreement and are most often applied to high-risk merchants.

Think of a landlord who, instead of taking one large deposit at the start, keeps a small part of each month's rent for a while and hands it back later. At any moment the landlord is holding a cushion, but each piece of it is eventually returned if nothing goes wrong.

A rolling reserve works the same way. Each day, the card processor pays the merchant most of what customers spent and keeps a small slice. After a set number of months, that day's slice is paid out, while newer slices are still being held. The processor does this because customers can ask their bank for refunds for months after a purchase, and the processor is on the hook if the merchant has closed or cannot pay.

The two terms that define a rolling reserve are the percentage withheld and the holding period. Once the first holding period has passed, the daily release roughly matches the daily withholding, so the reserve balance levels off. The steady-state balance can be estimated as:

• $R$ is the reserve balance once it has stabilised.
• $p$ is the percentage withheld, written as a decimal.
• $S$ is average daily settled sales.
• $d$ is the holding period in days.

Worked example: a merchant sells $20,000 a day by card under a 10% rolling reserve with a 180-day hold. The acquirer keeps $2,000 a day. After 180 days, it holds about 0.10 × 20,000 × 180 = $360,000, and from then on releases about $2,000 a day while withholding $2,000 a day. That balance equals about 18 days of the merchant's sales, which shows why reserves weigh heavily on working capital.

• Underwriting risk. New merchants with no processing history, weak finances or a business model with delayed delivery, such as travel, ticketing and pre-orders, may be boarded with a reserve from day one as part of underwriting.
• Rising disputes. A climbing chargeback ratio or fraud-to-sales ratio, or entry into a network monitoring programme, often triggers a new or larger reserve.
• Changes in the business. Sudden growth well beyond forecast, a switch to a new product line, or signs of financial stress can all lead to a reserve.
• Aggregated models. A payment facilitator is responsible for its sub-merchants' losses and commonly applies reserves to them, and may itself be subject to a reserve from its sponsor acquirer.

Typical terms quoted in the industry run from about 5% to 10% held for 90 to 180 days, but there is no network-wide standard; the figures are commercial terms negotiated case by case.

The reserved funds are usually held in a reserve account controlled by the acquirer, and the merchant agreement gives the acquirer the right to debit it for chargebacks, refunds, network assessments and unpaid fees. Agreements commonly let the acquirer keep the reserve for some months after the merchant leaves, since chargebacks can still arrive. For the merchant the reserve is still its money, so it is shown as a receivable on the balance sheet, not as an expense. Whether the funds are protected if the acquirer fails depends on how the account is structured and on local law.

For merchants, a rolling reserve ties up cash that could fund stock or marketing, and it is often imposed with little notice. Merchants can sometimes negotiate a lower percentage, a cap, a shorter hold, or a release schedule tied to an improving dispute record. Alternatives that give the acquirer similar protection include a bank guarantee or letter of credit, a fixed cash deposit, or shorter-term delayed settlement. Spreading volume across providers through multi-acquirer processing does not remove reserves but can limit how much is held by any one party.

• Visa
• Mastercard