Product Bundle Calculator
Calculate bundle contribution, target-compatible discounts and whole-bundle break-even with period operating profit shown separately.
8 of 8 free uses remaining today
Compare a bundle discount against entered reference prices, measure variable-cost contribution and test a target contribution margin. Estimate period operating profit separately from per-bundle contribution.
Worked example
Example output from the starting values. Enter your figures and press Calculate for your result.
- Reference-price reduction per bundle
- 16 currency units
- Scenario net bundle price
- 64 currency units
- Variable costs including selling fees
- 37.156 currency units
- Contribution per bundle
- 26.844 currency units/bundle
- Scenario contribution margin
- 41.9438 %
- Upward-rounded target contribution price
- 52.61 currency units
- Maximum target-compatible reference discount
- 34.2375 %
- Whole bundles to cover period fixed costs
- 38 bundles/period
- Projected period net product revenue
- 6,400 currency units
- Projected period operating profit
- 1,684.4 currency units
- Scenario target check
- Meets the chosen contribution-margin target
Calculate your figures to enable a brand-free CSV download.
Formula
Scenario bundle price = reference-price sum × (1 − discount fraction). Base variable cost B = component product costs + variable fulfillment + allocated fixed transaction charge. Contribution per bundle = bundle price × (1 − fee fraction) − B. Contribution margin = contribution ÷ positive bundle price × 100. Target-margin price = B ÷ (1 − fee fraction − target margin fraction), rounded up to the chosen increment. Maximum target-compatible discount = (reference sum − rounded target price) ÷ positive reference sum × 100, only when a positive target price does not exceed the reference. Whole-bundle operating break-even = ceiling(period fixed costs ÷ positive contribution); period operating profit = contribution × volume − fixed costs.
How to use this calculation
A reference sum of 80 with one 20% discount gives a bundle price of 64 and a reference reduction of 16. Component costs 30, fulfillment 5, fixed fee 0.30 and a 2.9% proportional fee give 37.156 variable costs and 26.844 contribution per bundle, a 41.94375% contribution margin. A 30% contribution target gives a 52.61 upward-rounded price, corresponding to a 34.2375% maximum discount from this reference sum. With 1,000 period fixed costs, 38 complete bundles cover those costs; 100 bundles imply 1,684.40 operating profit before excluded expenses.
- Enter totals for one complete fixed bundle at its actual component quantities and a consistent currency/product mix. The discount applies once to the aggregate reference sum; component-level discount/tax allocation is platform-specific and not produced here. Reference prices must be comparable and defensible before making a consumer savings claim. A 100% discount is a valid free/loss scenario, not a positive-margin offer.
- Contribution deducts entered variable product, fulfillment and selling fees but not period fixed operating costs; it differs from gross margin and net profit. The target price uses the same fee basis, while fixed costs are assessed separately using volume. A target price above the reference cannot be achieved with a nonnegative discount. A zero reference or zero monetary target floor does not justify inventing a percentage margin at a zero selling price.
- The model assumes unchanged component costs, fee basis and bundle mix across volume. Positive contribution supports a whole-bundle break-even threshold; nonpositive contribution cannot cover positive fixed costs. With zero fixed costs, zero sales can meet zero operating profit even if positive-volume sales would lose money. Projected profit excludes financing, income tax and unentered costs. Changing sales mix, returns, cannibalization, capacity or quantity discounts can change outcomes; this does not measure incremental campaign ROI, update a store or guarantee achievable demand.
Formula reference: AccountingCoach: Contribution margin ratio. General planning information, not a guarantee of business results.
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