Rolling Reserve Cash Flow Calculator

How this calculator works

A rolling reserve is money your payment processor holds back from each deposit as protection against future chargebacks, refunds, or losses. If your agreement says 10% for 180 days, then 10% of every day's card sales is set aside and released about six months later. Because a new slice is withheld every day and nothing comes back until the hold period ends, the balance builds month after month. It levels off only when releases start matching new withholdings. With flat volume, that steady-state balance is roughly monthly volume x reserve percentage x months held.

Delayed funding adds a second layer: sales made in the last few days of any month are still in transit and not in your bank. This calculator models both month by month so you can see the total cash the processor holds at any point. It shows the peak, when releases begin, and how that compares with the cash you need to keep for payroll, rent, and inventory.

Chargebacks hit cash flow on top of the reserve: you lose the disputed sale and usually pay a fee. The tool adds those costs and estimates your chargeback ratio, because underwriters often review chargeback history when setting or revisiting reserve terms. Card brands run monitoring programs with thresholds that change over time, so check the current rules with your processor.

Reserve terms are set by each provider's underwriting and vary by provider. This tool models the terms you enter. It does not predict what any provider will offer or agree to change.

The math behind your chart

1. Volume each month: your average monthly volume, or your 12 seasonal amounts if you checked the seasonal box.
2. Hold months (H): hold days divided by 30, rounded up. A 0-day hold means no reserve.
3. Withheld: that month's volume x reserve percentage.
4. Released: the amount withheld H months earlier, returned in one lump.
5. Reserve balance: everything withheld so far minus everything released so far, starting from $0 in month 1.
6. Funding float: (volume x (1 - reserve %) / 30) x funding delay days.
7. Cash held: reserve balance + funding float. The peak is the highest month; the peak month is the first month it is reached.
8. Steady-state reserve: average monthly volume x reserve % x H.
9. Chargeback cost: chargebacks per month x (average chargeback amount + fee per dispute).
10. Net deposits: volume - processing fees - withheld + released - chargeback losses - chargeback fees - change in funding float.

What the buffer warning means

The tool divides peak cash held by the operating cash buffer you entered. At 100% or more it flags High, because the processor could be holding more than the cash you rely on for payroll and rent. From 50% up to 100% it flags Caution. Below 50% it shows Within buffer. These cutoffs are a flagging rule built into this tool, not an industry standard.

Assumptions this calculator uses

• Days per month: 30. Simplifying assumption used to convert hold days and funding delay days into months.
• Hold months: ceil(hold days / 30); for example 90 days = 3 months, 180 days = 6 months. Rounding up is conservative. Actual release dates depend on your agreement and may be daily rather than monthly.
• Reserve basis: reserve % applied to gross card volume. Some agreements calculate reserves on net settlement or use a capped or up-front reserve instead.
• Release timing: each month's withheld amount releases in one lump H months later, a simplification of a daily rolling release.
• Starting reserve balance: $0 in month 1 (new account or newly applied reserve terms).
• Funding float: (monthly volume x (1 - reserve %) / 30) x funding delay days, assuming sales are spread evenly across the month.
• Estimated effective processing rate by business type (used only if you leave your rate blank): retail 2.55%, restaurant 2.75%, ecommerce 3.15%, services 2.90%, healthcare 2.65%, B2B 2.80%, high-risk 4.25%. These are placeholder industry-average estimates, not a quote and not TouchSuite's rates.
• Chargeback fee per dispute (if left blank): $25 placeholder assumption. Replace it with the fee in your agreement or statement.
• Chargeback handling: debited from settlement in the month received; none won or reversed; same count every month. This is conservative; some processors debit chargebacks from the reserve instead.
• Buffer warning cutoffs: Caution at 50% of buffer, High at 100% or more. Tool flagging rule, not an industry standard.
• Scenario grid (full report): reserve 5%, 10%, 15% x hold 90 and 180 days. Illustrative combinations for comparison only; not offers and not typical terms from any provider.

Estimates are based on published industry averages and are not a quote. Actual rates depend on card mix, ticket size, industry, and underwriting.

Frequently asked questions