Enter the values used by promotion profit lift
Compare total contribution before and during a percentage discount using separate baseline and promotional unit volumes. Enter the assumptions for the same time period and currency, and check any minimum or maximum values displayed next to the input fields.
Regular selling price, Variable cost per unit, Promotion discount, Baseline units sold, Promotional units sold.
Change one variable so you can see the effect without mixing several assumptions.
The worked example below shows the formula and the independently rendered default-input results.
Calculate promotion profit lift from sample inputs
These are the same starting values loaded into the interactive calculator above. The displayed results below come from the same calculation engine as the live tool.
Step 1 — Record the inputs
Step 2 — Identify the formula
Step 3 — Substitute the values
For this exact worked case, use Regular selling price = $75; Variable cost per unit = $40; Promotion discount = 20%; Baseline units sold = 100 units; Promotional units sold = 180 units. Replace named formula variables with their input values as shown below. Keep the units consistent; a percent is divided by 100 wherever the model requires a decimal rate.
Step 4 — Read the calculated answer
Rounding follows the calculator display: whole units may be rounded up when an indivisible unit is required, while other values typically show up to two decimal places. The result is conditional on the entered assumptions, not a market quotation.
How to interpret this promotion profit lift result
This is a variable-contribution comparison. Additional fixed campaign costs, acquisition effects and future cannibalization are excluded.
Apply this result to a real order, product listing, or marketplace campaign. Reconcile the modeled amount with product cost, fulfillment, returns, promotions, and payment charges.
Scenario comparison
Compare a regular-price order with a discounted order, including any extra shipping or promotional subsidy.
Assumptions and limitations
Seller fees and shipping terms differ by platform, category, region and date. Any percentage entered is your assumption, not a live platform quote.
- Regular selling price: Enter a finite monetary value of at least 0.01. Use a consistent definition across comparison cases.
- Variable cost per unit: Enter a finite monetary value of at least 0. Use a consistent definition across comparison cases.
- Promotion discount: Enter a finite percentage value of at least 0 and no more than 100. Use a consistent definition across comparison cases.
- Baseline units sold: Enter a finite numeric value of at least 0. Use a consistent definition across comparison cases.
- Promotional units sold: Enter a finite numeric value of at least 0. Use a consistent definition across comparison cases.
Frequently asked questions
What does this calculator include?
It uses the named inputs above and the formula shown in the worked example. No other fees, revenue streams, or external data are automatically included.
Why could my real result be different?
Seller fees and shipping terms differ by platform, category, region and date. Any percentage entered is your assumption, not a live platform quote.
How should I compare two results?
Compare a regular-price order with a discounted order, including any extra shipping or promotional subsidy. Record the assumption that changed so a higher or lower answer is interpretable.
Promotion Profit Lift calculation method
This is a variable-contribution comparison. Additional fixed campaign costs, acquisition effects and future cannibalization are excluded.
Apply this calculator to a business decision
Compare the formula with a worked scenario and check the assumptions in the supporting guide.
What this estimate does—and does not—include
This tool is designed for quick planning and comparison. For tax, accounting, legal, investment, lending, or other regulated decisions, verify the result against the rules and assumptions that apply to your situation.
CalcScoutHQ shows the calculation logic so you can check assumptions, understand the result, and reproduce the math independently when needed.