15% Rolling Reserve: What It Is and How to Plan Your Cash Flow

What Is a Gateway's Rolling Reserve?

A rolling reserve, also called a security reserve, is the slice of each transaction that the gateway does not release along with the rest of the sale. It stays set aside in a reserve for a set period and is returned to the seller at the end of that term.

The idea is simple: a card sale is not 100% finished the instant it is approved. It can be disputed, reversed, or refunded afterward. The reserve guarantees there is balance to cover those cases without breaking the operation. At Mundpay, the standard reserve is 15% of the transaction value for 60 days, and the amount is returned to the seller at the end of the period if there are no disputes.

Notice the central point: a rolling reserve is not money you lose. It is your money, it just arrives later. That distinction changes everything when you plan your cash flow.

Why Does the Gateway Hold Back Part of Your Sales?

Because the risk of a sale does not end when the payment is approved. The buyer has weeks to dispute the purchase with the bank, and when that happens the money goes back to them, no matter whether the product was already delivered.

That forced reversal is the chargeback, and it has a cost. At Mundpay, each chargeback costs a fixed R$ 60.00 plus the refund of the gross sale amount. Add voluntary refunds on top of that, and it becomes clear why the gateway needs a reserve: if it had already passed on 100% of the value and the dispute came in afterward, who would cover the refund?

The reserve resolves that timing mismatch. It keeps balance available precisely during the window when a dispute can still appear. It is protection that works in favor of your account's stability, not against you: whoever operates with a low dispute rate sees the reserve go practically untouched, returned in full at the end of the period.

Why 15%, and What Does the Market Practice?

The reserve percentage varies between gateways and usually sits in a range of 5% to 15%, depending on the risk of the segment, the seller's history, and the type of product. International operations and categories with more disputes tend to sit at the top of that range.

Mundpay works with 15% as its standard. It is the ceiling of the market range, and it makes sense for a platform focused on global card sales, where chargebacks are more frequent and the cost of an uncovered dispute is high. The number is higher, but it comes paired with two things that reduce the real impact: a proactive risk team, which resolves about 90% of alerts before they turn into a formal chargeback, and the full return of the reserve at the end of the 60 days when there is no dispute.

In other words, the 15% is not a price for the platform. It is a temporary guarantee. The healthier your operation, the less that reserve gets used, and the more it simply functions as a delay in your cash entering. If you want the full cost picture, the article Is Mundpay worth it lays out fees and reserve side by side.

What Is the Effect of the Reserve on Your Cash Flow?

The best way to understand it is with numbers. The examples below are hypothetical and serve only to illustrate the mechanics.

Picture an operation billing R$ 30,000 a month in card sales:

• 15% of R$ 30,000 = R$ 4,500 goes into the reserve every month.
• Since each slice stays held for 60 days, in a stable regime you have roughly two months of overlapping reserves at once: approximately R$ 9,000 sitting constantly in reserve.
• From the third month on, the amount coming back (old reserve released) approaches the amount going out (new reserve formed). The held balance stabilizes around that R$ 9,000.

In other words, the scare happens at the start. In the first two months you build the reserve without receiving any returns yet. After that, the system reaches equilibrium and the reserve becomes a predictable amount, almost a working capital that turns on its own. The classic mistake is planning your cash flow as if 100% of your revenue landed instantly, and then getting stuck right in that initial reserve-building period.

How Do You Plan Your Operation Around the 15% Reserve?

A predictable reserve is a manageable reserve. Three practices solve almost the whole problem:

• Separate what is reserve from what is profit. In your spreadsheet, the 15% held does not count as available revenue for the month. It is a separate line, an amount receivable with a future date. That way you never spend money that has not landed yet.
• Keep working capital for the build-up period. The first 60 days are the tightest, because you are building the reserve without receiving returns yet. Entering the operation with enough breathing room for that window avoids the initial squeeze.
• Reduce chargebacks and refunds. Every dispute avoided is reserve that comes back to you intact. A clear product description, fast delivery, and responsive support bring down disputes and keep the 15% flowing back on schedule.

It is worth remembering that the reserve is just one piece of your cash cycle. The other is the time it takes for released money to actually reach your account. How that full cycle works, from payout to cash advance, is detailed in the guide to cash flow and payout terms for digital sellers. And when the bottleneck is the wait, the cash advance for digital product sellers is the lever that brings forward what is still to come.

What Should You Ask About the Reserve's Release Period?

The percentage is only half the equation. The other half is the period, and that is where the questions that define your cash flow live. Before you scale, get clear answers to:

• What is the exact release period? Mundpay's standard is 60 days, but confirm it in your contract, because specific account conditions may vary.
• Is the release automatic? Understand whether the reserve comes back on its own at the end of the period or whether it depends on a request, and whether it lands in your available balance or requires a new payout.
• How does the reserve behave in the event of a dispute? Know which slice a chargeback or refund is deducted from and how that affects the rest of the reserve.
• Can the percentage change? Confirm whether 15% is fixed or can be revised based on your history and volume.

None of these questions is a sign of distrust. It is management. A serious gateway answers all of them clearly, and the contract is where those answers become a commitment. Read that section with the same attention you give the fee table.