Start with the decision
A booth fee is due even if sales are quiet. Add the fixed event costs first, then ask what one average order contributes after its variable cost and effective payment fees. Revenue alone does not cover the booth.
Worked calculation
For event cost 250, average order 30, variable order cost 12 and fees 3% + 0.30, contribution is 16.80. Divide 250 by 16.80 and round up: 15 orders. For an additional 200 result, 27 orders are needed.
Turn event costs into required transactions
Break-even order count is fixed event cost divided by contribution per representative order, rounded upward. If one order contributes zero or less, a finite positive order count cannot cover the fixed cost under those assumptions.
Build event cost from the expenses you will pay even if sales are zero: booth, travel, parking, lodging and event-specific setup. Decide whether your own event hours are part of the target. Then estimate order contribution after product cost and payment charges; use a realistic average basket, not the most profitable order you can imagine.
Check the changed-cost scenario
Break-even orders are a threshold, not a forecast. Convert the number into a practical plan: how many transactions per event hour, what stock mix supports that basket, and what happens if weather or attendance changes? Keep unsold inventory as stock in a separate cash plan rather than treating every prepared unit as a cost of the event.
| Input or result | Value |
|---|---|
| Fixed event expense | 250 |
| Average order / variable cost | 30 / 12 |
| Effective fees | 3% + 0.30 |
| Contribution / break-even orders | 16.80 / 15 |
| 200 additional target result | 27 orders |
For a six-hour event, 15 orders means an average 2.5 transactions per hour, while 27 needs 4.5. This translates the threshold into an operating target; it does not prove attendance, conversion or stock mix can achieve it.
Use the example with your own inputs
Actual orders may have different baskets. Use a representative average, and review the outcome with real sales rather than treating break-even orders as a demand forecast.
Craft Fair Break-Even Calculator | PourMarginScope and source checks
These are planning examples, not actual seller results. Keep currency, tax basis and cost allocation consistent. Enter your own figures and reconcile with your records; tax, demand, refunds and unlisted business costs can change the outcome.
See more pricing examples and assumptions.