Calculate your digital product break-even point.
Break-even is the number of completed sales needed to recover a defined cost. The useful calculation starts with contribution per sale, not gross price.
The two formulas
Contribution per sale = price − variable costs per completed saleBreak-even sales = fixed cost to recover ÷ contribution per saleRound break-even sales up to the next whole purchase. If a $49 product has $5 of modeled variable costs, its contribution is $44. Recovering a $500 fixed cost therefore requires 12 completed sales because $500 divided by $44 is 11.36.
Worked examples
| Scenario | Price | Variable cost | Contribution | Fixed cost | Break-even sales |
|---|---|---|---|---|---|
| Low-price template | $19 | $3 | $16 | $500 | 32 |
| Experiment kit | $49 | $5 | $44 | $500 | 12 |
| Premium toolkit | $99 | $10 | $89 | $500 | 6 |
These are arithmetic examples, not measured Aster results or income forecasts. Your inputs should include the costs that actually change when a sale occurs.
Separate fixed and variable costs
Fixed costs do not change with each order during the test. Examples can include a one-time design purchase or a defined launch budget. Variable costs grow with sales and can include payment costs, refunds, paid acquisition per order, and delivery or support costs tied to each buyer.
Convert sales into a traffic requirement
Qualified visits needed = break-even sales ÷ purchase conversion rateIf the $49 example needs 12 sales, a 2% modeled purchase rate implies 600 qualified visits. At 1%, it implies 1,200. Conversion is an assumption until observed, and broad impressions are not qualified visits.
Use a decision boundary
Set the maximum cost and time before launch. Continue only when observed buyer behavior supports the next test. Diagnose trust, pricing, payment, or delivery friction when qualified visitors start checkout but do not complete payment.
Break-even analysis cannot guarantee demand. It makes the amount at risk, the sales requirement, and the traffic assumption visible before more money is committed.