Your numbers
Explore the numbers
Examples, chart, and saved snapshots
Start with a realistic example, adjust the inputs, or save your numbers before experimenting.
A 30 toy after a 15 percent referral
The item’s total price is 30. The referral rate is 15 percent, with a 0.30 minimum, matching Toys and Games on Amazon’s pricing page. Fulfillment in this example is 5. Your unit cost is 12.
Item total price: 25% lower
Change item total price to 23 while keeping the other example values the same.
Item total price: 25% higher
Change item total price to 38 while keeping the other example values the same.
Interactive chart
See what changes the result
This result is categorical, so compare the calculated values in the examples and snapshots instead.
The chart changes one input while holding all other current values steady. It is a sensitivity view, not a forecast.
Browser snapshots
Freeze these values
Save the current calculation, experiment freely, and restore it later.
No saved snapshots for this calculator yet.
Compare snapshots
What changed?
Save one more snapshot to compare plans.
Saved only in this browser. Nothing is uploaded, and clearing browser data removes the snapshots.
Quick answer
What does the Marketplace fee margin calculate?
What margin is left after a marketplace fee and the unit cost? This calculator uses item total price, referral fee, minimum referral fee, fulfillment or other per-item fee, and unit cost to estimate margin after the marketplace fee immediately in your browser.
With the values currently entered, the result is 28.3% — margin after fees and unit cost. It also shows profit after fees and cost, referral fee, and fee that applied.
How to use the Marketplace fee margin
- Replace the example values with your own numbers.
- Review the result and supporting figures as they update automatically.
- Check the formula and assumptions before using the estimate for a decision.
Inputs used
- Item total price
- Referral fee — entered in %
- Minimum referral fee
- Fulfillment or other per-item fee
- Unit cost
Marketplace fee margin formula
Referral fee = the greater of price × referral percent and the minimum. Profit = price − referral fee − fulfillment − unit cost. Margin = profit ÷ price.
Assumptions
- Amazon’s pricing page charges a percentage of the item’s total price or a minimum, whichever is greater. Toys and Games is listed at 15 percent with a $0.30 minimum. The total price includes shipping and gift wrap charged to the buyer.
- The fulfillment box is an amount you type. Amazon’s fulfillment fees depend on size and weight, so this $5 example is not an FBA rate. A category with a split rate needs the fee you work out for that price.
Verify the inputs
Authoritative sources
These sources explain the definitions, factors, or rules behind this tool. Their geographic scope is shown because an official source for one country is not automatically valid somewhere else.
Charges a percentage of the item’s total price or a minimum, whichever is greater. Toys and Games is listed at 15 percent with a $0.30 minimum. The total price includes the list price plus shipping and gift wrap charged to the buyer.
Break-even pointUS Small Business AdministrationScope: US small-business planning; method is generalDefines contribution margin as the difference between price and the cost to make the product, and writes the ratio as (price − variable cost) ÷ price.
Sources do not endorse Calculum. Check the source date, scope, and your own documents before making a financial, tax, insurance, or reporting decision.
Practical guide
Marketplace fee margin example and edge cases
A marketplace referral fee is a percent of the item’s total price, or a minimum, whichever is greater. Amazon’s pricing page lists Toys and Games at 15 percent with a 0.30 minimum. This page subtracts that fee, a fulfillment amount you type, and your unit cost.
Example: A 30 toy after a 15 percent referral
The item’s total price is 30. The referral rate is 15 percent, with a 0.30 minimum, matching Toys and Games on Amazon’s pricing page. Fulfillment in this example is 5. Your unit cost is 12.
- Item total price
- 30
- Referral fee
- 15 %
- Minimum referral fee
- 0.3
- Fulfillment or other per-item fee
- 5
- Unit cost
- 12
Calculated result28.3%margin after fees and unit cost
The referral fee is 4.50, because 15 percent of 30 is above 0.30. Fees plus the unit cost are 21.50. Profit is 8.50, which is 28.3 percent of the 30 price. The 5 fulfillment line is an amount you type.
Example results use the default display profile. The calculator above follows your selected country and units.
How to read the result
- Read the margin first. Then check the referral fee in dollars. On a 30 price the 15 percent fee is larger than the 0.30 minimum, so the percent applies.
- Amazon’s total price includes shipping and gift wrap the buyer paid. Put that full price in the first box when you are matching their referral fee.
Edge cases worth checking
The category uses a split referral rate
Furniture on Amazon’s page is 15 percent up to 200 and 10 percent above that. This page applies one rate to the whole price. Work the split fee yourself and type it as a dollar minimum with the percent set to 0, or type an effective percent.
A one-dollar item hits the minimum
Fifteen percent of 1 is 0.15. The 0.30 minimum is larger, so the referral fee is 0.30. Amazon’s rule uses whichever amount is greater.
What changes the result most
Item total price
Use a current amount for item total price. Include fees or recurring costs that belong in the same figure.
Referral fee
Test a lower and higher referral fee. A small percentage change can move the final result more than expected.
Minimum referral fee
Use a current amount for minimum referral fee. Include fees or recurring costs that belong in the same figure.
Try a different scenario
Small changes show whether the answer is stable or sensitive.
Item total price: 25% lower
2311.1%margin after fees and unit cost
Item total price: 25% higher
3840.3%margin after fees and unit cost
Referral fee: 25% higher
19 %24.3%margin after fees and unit cost
Common mistakes
Check item total price
Amazon’s pricing page charges a percentage of the item’s total price or a minimum, whichever is greater. Toys and Games is listed at 15 percent with a $0.30 minimum. The total price includes shipping and gift wrap charged to the buyer. Make sure this matches the number you enter.
Keep unit cost consistent
The fulfillment box is an amount you type. Amazon’s fulfillment fees depend on size and weight, so this $5 example is not an FBA rate. A category with a split rate needs the fee you work out for that price. Use the same units and time period throughout the calculation.
Do not rely on one marketplace fee margin scenario
Run a cautious case and an optimistic case. The range is often more useful than one exact-looking number.
Use this result well
What margin is left after a marketplace fee and the unit cost?
It does not replace a quote, contract, accountant, or local employment guidance.