Method and assumptions
Use this platform-neutral model when a marketplace does not have a dedicated calculator. Enter a consistent reporting period and the effective rates from your own statement.
Net profit = gross sales - refunds - product cost - fulfillment - percentage fees - fixed order fees - advertising - allocated overhead.
Worked scenario
Use this neutral model when a marketplace does not have a dedicated preset. Enter order revenue, product and fulfillment cost, percentage fees, fixed order charges, advertising and an overhead allocation. Run the same product with each channel fee structure to compare contribution on a consistent basis.
How to interpret the result
A generic model is only as complete as its fee map. Review a settlement statement and classify every deduction before relying on the result. Keep pass-through tax, refundable deposits and recoverable tax separate from economic revenue and permanent cost.
Input reference
- Currency
- Example default: USD
- Gross sales
- Example default: 10000
- Orders
- Example default: 200
- Refunds and discounts
- Example default: 300
- Total product cost
- Example default: 3500
- Fulfillment and shipping
- Example default: 1000
- Marketplace fee rate
- Example default: 12%
- Payment processing rate
- Example default: 3%
- Fixed fee per order
- Example default: 0.3
- Advertising spend
- Example default: 1500
- Allocated overhead
- Example default: 500
Common mistakes
- Combining different fee bases into one blended percentage.
- Omitting conditional or per-order charges.
- Comparing channels with different shipping or return assumptions.
Before using the result
- Map one real settlement before setting defaults.
- Use the same order profile for channel comparison.
- Separate contribution profit from allocated net profit.
Questions to check before deciding
Which marketplaces can use this calculator?
Any marketplace can use it when you enter the effective fee rates and costs from that platform.
Should overhead include salaries and software?
Include the portion attributable to the selected reporting period when you want a net operating view.
Independent calculator. Not affiliated with or endorsed by the platforms mentioned.