Sale & Promo Discount Calculator
Test a store-wide sale before you run it. Enter your normal revenue and margin, the discount and the sales lift you expect, and see whether profit goes up or down.
Who it's for: Store owners planning Black Friday, holiday or seasonal sales who want to avoid discounting away their profit.
How to use it
- Enter baseline monthly revenue and your average margin.
- Enter the discount you plan to offer.
- Enter the extra sales volume you expect.
- Compare new gross profit to your baseline.
Assumptions
Baseline profit = revenue × margin. New revenue = revenue × (1 − discount) × (1 + lift). Your unit cost does not drop during a sale, so new profit = new revenue − baseline cost × (1 + lift). A discount cuts margin faster than it cuts price: at a 60% margin, a 20% discount needs about a 50% volume lift just to break even. Defaults are examples.
Results are estimates for planning, not tax, legal or financial advice. All figures are editable.
Related tools
Go further
Want this in a spreadsheet you can keep? The BFCM & Product Launch Playbook (Cyber Monday Email Templates, Product Launch Checklist, SMS, Google Docs, Sheets) is a ready-made template.
Get the BFCM & Product Launch Playbook on Etsy (opens in a new tab)