Refund Impact Calculator

Estimate net refund loss when payment fees may not be refunded and other sunk costs already happened.

Inputs

Enter your assumptions. Percent fields use plain percentages (for example: 2.9).

Refund Amount ($)Refund Rate (%)Optional. If > 0, used as an expected-rate multiplier on refund amount.Payment Fee Refundable?Payment Fee (%)Other Irreversible Costs ($)

How to use this calculator

Enter consistent inputs for Refund Amount ($), Refund Rate (%), Payment Fee Refundable?, and Payment Fee (%).
Adjust one variable at a time to measure true sensitivity.
Review Effective Refund Amount, Payment Fee, and Fee Loss before deciding on budget, pricing, or channel changes.

Input and output checklist

Inputs

Refund Amount ($)
Refund Rate (%)
Payment Fee Refundable?
Payment Fee (%)
Other Irreversible Costs ($)

Outputs

Effective Refund Amount
Payment Fee
Fee Loss
Net Loss

Scenario Notes (optional)

Use this when refund rates increase, so your team can quantify true loss including fee and irreversible cost components.

Counting refunds as only lost revenue and ignoring sunk costs.
Assuming all payment fees are refundable across gateways.
Using average refund rate without segmenting by product or channel.

Example: If refund amount is 100 USD, fee is non-refundable, and other irreversible costs are 12 USD, net loss is higher than refund amount alone and should be reflected in CAC and pricing decisions.