Seller economics / pricing
Price backward from the margin you need.
The minimum viable price is the one that survives fees and costs, not the one that only looks competitive.
Updated September 1, 2026 · Illustrative education, not accounting or tax advice.
Separate fixed and percentage costs
Fixed costs do not scale with price; percentage fees do. Keeping them in separate buckets prevents a percentage fee from being applied twice and makes the result easier to compare with a statement.
The pricing formula
Required revenue = fixed dollar costs ÷ (1 − percentage fee rate − target margin)
The displayed unit price should be rounded upward to the next cent so ordinary rounding does not push the result below the requested margin.
Stress-test before publishing
Use the product pricing calculator with a higher shipping cost, a return allowance, and a realistic ad budget. If the resulting price is outside the market range, adjust the offer or cost structure instead of hiding the margin target.
Boundaries
- This is not a demand forecast or competitor-price scraper.
- MarginTally does not prescribe the target margin you should choose.
- Platform-specific rates must be checked against the current fee policy.