Coupon ROI Calculator

Estimate incremental coupon profit versus a no-coupon baseline, with explicit discount costs, ROI basis and break-even additional orders.

Daily Uses

8 of 8 free uses remaining today

Estimate incremental contribution after a merchant-funded coupon campaign. Separate additional orders from customers who would have purchased anyway and show the explicit discount-plus-campaign investment basis.

Enter your business figures

Redeemed orders in the campaign cohort (orders)

Whole completed represented orders, not coupons distributed, customers or clicks. Multiple-item orders require a consistent representative order-value basis.

Estimated genuinely additional redeemed orders (orders)

Your counterfactual estimate from a comparable control/baseline within these redeemed orders, from 0 to the redemption count. Not automatically all first-time customers.

Net product value per order before this coupon (currency/order)

After other discounts/reversals, excluding taxes and duties. Use the same product mix and returns basis with and without this coupon.

Variable product and order cost per order (currency/order)

COGS, fulfillment and variable transaction expenses for represented orders, excluding the coupon reduction and campaign amounts below. Constant order economics are assumed.

Net merchant-funded coupon reduction per order (currency/order)

This campaign's realized product-value reduction after any applicable reimbursement, no more than the pre-coupon product value. Enter an amount, not a percentage.

Extra campaign operating expense (currency)

Additional media, platform, claim-processing or staffing costs beyond the entered ordinary variable order costs. Exclude coupon reductions already entered.

Other displaced contribution not in the baseline (currency)

Additional nonnegative lost contribution from other products or future-period sales. Do not count the same displacement again if already reflected in the incremental-order estimate.

Each successful calculation uses one of this tool’s 8 daily free uses. Editing, resetting and invalid inputs use none. Your figures remain in your browser.

Worked example

Example output from the starting values. Enter your figures and press Calculate for your result.

Pre-coupon contribution per order: 30 currency units/order
Estimated additional-order share: 60 %
Total merchant-funded coupon reductions: 5,000 currency units
Actual redeemed-order contribution after coupon: 10,000 currency units
Counterfactual nonincremental-order contribution: 6,000 currency units
Promotion investment basis (coupon + extra expense): 6,000 currency units
Estimated incremental profit change: 3,000 currency units
Coupon ROI on stated investment basis: 50 %
Required additional whole orders at fixed redemptions: 200 orders
Break-even scenario feasibility: Required additional-order count fits the fixed redemption scenario

Calculate your figures to enable a brand-free CSV download.

Formula

Pre-coupon unit contribution C = pre-coupon net order value − variable order cost. Actual redeemed-order contribution = R × (C − D). Counterfactual contribution from nonincremental orders = (R − I) × C. Incremental profit change = I × C − R × D − extra campaign expense − other displaced contribution. Promotion investment basis = R × D + extra campaign expense. ROI = profit change ÷ positive investment basis × 100. Required incremental orders at fixed R = ceiling((investment basis + other displaced contribution) ÷ positive C), subject to no more than R orders.

How to use this calculation

For 500 redeemed orders, an estimated 300 additional orders, pre-coupon value 50, variable cost 20, coupon reduction 10 and 1,000 campaign expense, contribution before the coupon is 30 per order. Actual redeemed-order contribution is 10,000 versus 6,000 from the 200 orders expected anyway. After 1,000 extra expense, incremental profit change is 3,000. The explicit investment basis is 5,000 coupon reductions plus 1,000 campaign expense: 50% ROI. At the same fixed redemption count, 200 genuinely additional orders are required to cover that basis, not 200 total redemptions.

Use one currency, matching campaign cohort/window and consistent net order economics. Incremental redeemed orders cannot exceed total redeemed orders. This is a constant-order-value, merchant-funded coupon scenario, not automatic campaign attribution or causal proof. Baselines must account for seasonality, pull-forward and mix; multiple discounts, reimbursements, variable fees and returned orders require consistent net amounts. Test/control evidence is stronger than simply calling every coupon order additional.
The return is the contribution change versus customers buying without the coupon, after additional campaign expense and separately entered displacement. Discounts are subtracted once across every redeemed order, including customers who would have paid full price. The ROI denominator deliberately includes foregone coupon revenue plus extra campaign expense, not lost contribution or all ordinary product costs; it is not a cash-only, lifetime-value or net-income ROI. Do not subtract refunds, coupon reductions, variable costs or displaced sales twice.
Zero redemptions, zero discount or zero campaign expense can be valid. Zero investment leaves percentage ROI undefined while the monetary profit change still works. Losses and ROI below −100% are valid. The break-even incremental-order threshold holds total redemptions and their discount bill fixed; exceeding that count is labelled infeasible, not a demand forecast. With zero costs and nonpositive contribution, zero additional orders can avoid a loss, but negative contribution makes further additional orders reduce profit. Changing redemption volume or order economics requires recalculation; no coupon is issued or customer message sent.

Formula reference: Shopify: Incremental sales, baselines and control groups. General planning information, not a guarantee of business results.

Review contribution versus operating profit per order

About incremental promotion profit and full campaign costs

Related Tools

View all

Product Pricing Calculator

Calculate fee-adjusted target pricing, upward price increments and candidate margins without confusing residual profit with markup.

Amazon FBA Calculator

Calculate Amazon FBA fees, costs, and profit margins

Dropshipping Profit Calculator

Reconcile refunds, supplier recoveries, fulfillment and entered selling costs to calculate contribution and estimated operating profit.

Conversion Rate Calculator

Calculate session-based purchase conversion and compare percentage-point and relative changes with a matching period.