Net profit or loss on a crypto buy-sell pair after fees

How Fees Eat Into Crypto Gains

Major crypto exchanges charge 0.1-1.5 percent per trade. A round-trip (buy then sell) means paying the fee twice on different amounts. A 0.5 percent fee on each side eats approximately 1 percent of the total trade value — meaningful for active traders, less so for long-term holders.

The Simple Math Behind Big Numbers

Net profit equals (sell price times units) minus (buy price times units) minus total fees. Most exchanges show gross numbers on trade history; this calculator strips fees to show true economic profit. Record the net figure for tax reporting, not the gross.

A worked example

Try the defaults: units owned of 0.5, buy price per unit of 30,000, sell price per unit of 45,000, fee of 0.5. The tool returns 7,312.50. You can adjust any input and the result updates as you type — no submit button, no reload. That's the real power here: seeing how sensitive the output is to one or two assumptions.

What moves the number most

The result responds to Units Owned, Buy Price per Unit, Sell Price per Unit, and Fee % (each side). Not every input has equal weight. Flip one at a time toward extreme values to feel which ones move the needle most for your situation.

The formula behind this

Net profit is (units times sell price) minus (units times buy price) minus fees on both the buy side and sell side. Fee is applied to the full notional of each leg. ROI is net profit divided by buy-side investment. Everything the calculator does is shown in the formula box below, so you can check the math against your own spreadsheet if you want.

Where this fits in planning

This is a "what-if" tool, not a forecast. Use it to test ideas before committing: what happens if the rate is 2% lower than hoped, what happens if you add five more years. The value is in the scenarios you run, not the single answer you get from the defaults.

What this doesn't capture

Steady-rate math ignores real-world volatility. Actual returns are lumpy; sequence-of-returns risk matters most in drawdown; fees and taxes drag on compound growth; and behaviour changes in drawdowns can reduce outcomes below the projection. Treat the number as one scenario, not a forecast.