Discount & Promotion Profit Calculator
Model the true profit impact of percentage discounts, fixed offers, two-for-one, BOGOHP, comps, set menus, vouchers and happy hour. See profit lost per sale, uplift required and best/expected/worst-case scenarios.
Scenario planner
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What to work out next
All calculators →About this calculator
A discount that fills tables can still lose money. This calculator shows the real profit impact of any promotion — percentage off, fixed value, two-for-one, BOGOHP, comps, set menus, vouchers and happy hour.
It compares contribution per order before and after the offer, adds any commission or marketing cost, and works out how much extra volume you need to end up ahead. The scenario planner shows worst, expected and best-case outcomes.
Frequently asked questions
How do I know if a promotion is worth running?+
Compare 'Total promotion profit vs normal' against zero. Positive means it beats normal trading; negative means the discount is deeper than the extra sales can recover.
How much sales uplift do I need?+
The 'Sales uplift required' figure tells you the % more sales needed to match your normal-period profit. If it's above 25–30%, the offer is usually too deep.
Should I include the item cost of a comp item?+
Yes — enter the second item's cost so contribution reflects both items you're serving.
How does this handle voucher and platform commission?+
Enter it as a % of the promotional order. Contribution is calculated after commission, so the profit numbers stay honest.