Platform Fee Calculator
See exactly how much a platform keeps and what lands in your account. Enter a sale amount, the platform percentage, the processing percentage, and any fixed per-transaction fee to get your total fees and net payout.
Last updated June 2, 2026
Your sale and fees
All optional- Sale amount$0.00
- Platform fee$0.00
- Processing fee$0.00
- Flat fee$0.00
- Total fees- $0.00
- Fees as share of saleNot set
This is a single-sale view. Multiply by volume for a monthly picture. Nothing is saved to the page address.
Assumptions this calculator makes
- Results are estimates based only on the numbers you enter.
- Percentage fees are applied to the sale amount you enter.
- A fixed fee is added once per transaction.
- This is a single-sale view; multiply by volume for a monthly picture.
- Enter the actual fees for your platform, since they vary and change.
This is an estimate, not advice
Every result here is a rough model based only on the numbers you enter. Sidequity is an informational tool and does not provide professional, tax, legal, investment, or financial advice, and it makes no income guarantees. Any tax set-aside is a planning placeholder, not a tax calculation.
For decisions that affect your money, taxes, or business, review your situation with a qualified professional. See our full disclaimer.
Frequently asked questions
How do I calculate platform fees?
Multiply the sale amount by each percentage fee, add any fixed per-transaction fee, and subtract the total from the sale. This calculator does that for you and shows both the total fees and the net payout you would keep from one sale.
What is the difference between platform fees and processing fees?
Platform or marketplace fees are charged by the service that connects you with buyers. Payment processing fees are charged to handle the card or transfer. Many sales include both, so the tool lets you enter each separately.
Why include a fixed fee?
Many processors charge a small flat amount per transaction on top of a percentage. On low-priced sales that flat fee can be a large share of the total, so including it gives a more accurate net payout.
Platform Fee Calculator last updated June 2, 2026. Back to all calculators.