Selling Crypto to Start a Business: How to Calculate Your Real Profit

Selling crypto to fund a business feels like a clean break: cash out, open the doors, get started. But the number on the exchange screen is not the number that lands in your business bank account. Fees take a slice, tax takes another, and the gap can be large enough to wreck a startup budget.

That gap is why the maths matters before you sell. If you know your cost basis, your fees, and a realistic tax rate, you can work out exactly how much seed money you will actually have — and test what happens if the price moves before you sell.

This guide walks through the calculation with a realistic Bitcoin example, then shows how the final net cash figure translates into a practical startup budget.

Start With Your Cost Basis, Not the Sale Price

Your profit is not the sale price. It is the sale price minus what you paid, minus the costs of selling. The amount you originally paid is your cost basis, and getting it right is the foundation of everything that follows.

If you bought in several tranches at different prices, use a weighted average: add up everything you spent and divide by the total coins you hold. If you have bought crypto in multiple batches, our guide to calculating profit across multiple batches walks through the averaging method.

Key takeaway: Your real profit is sale proceeds minus cost basis, minus fees, minus tax — never the headline price alone.

The Worked Example: 1.2 BTC Bought at $35,000

Suppose you bought 1.2 BTC at an average price of $35,000, giving a cost basis of 1.2 × $35,000 = $42,000. Now imagine you sell at $85,000: gross proceeds are 1.2 × $85,000 = $102,000, but that is not your money yet.

Subtract exchange fees first. At 0.5%, fees come to $510, leaving $101,490. The taxable gain is $101,490 − $42,000 = $59,490, and tax at 20% is $11,898. Net cash is therefore $102,000 − $510 − $11,898 = $89,592.

Note the order: tax is charged on the gain after fees, not on the full sale amount. That is the step most casual estimates get wrong.

What If the Price Moves Before You Sell?

The table below shows how the same 1.2 BTC position plays out at three sale prices, with fees at 0.5% and tax at 20% of the gain in each case.

The spread is striking: a $30,000 move in the Bitcoin price changes your usable startup cash by nearly $29,000. Plan around a price range, not a single target, when a business depends on the proceeds.

It also helps to know your floor. Our guide to calculating the break-even price for any crypto trade shows how to find the price at which you simply get your money back.

Turning $89,592 of Net Cash Into a Startup Budget

A net figure only becomes useful when you assign it. Take the $89,592 above: $60,000 for equipment and setup, $20,000 as operating runway for the first few months, and $9,592 held back as a buffer.

That buffer is doing more work than it looks: new businesses rarely cost exactly what the spreadsheet says. Keeping roughly 10% unallocated leaves room for a delay, a repair, or a slow first month. Run the same split against the lower $75,264 scenario too — the plan would need trimming then, rather than silent borrowing later.

Key takeaway: Budget from your after-fee, after-tax net cash — and plan the business around the lower price scenario, not the best one.

Three Mistakes That Shrink Your Real Profit

Forgetting the fee on both sides

Check your actual fee schedule rather than guessing, and confirm the current price on a reliable source such as CoinGecko.

Using the wrong tax rate

Tax varies by country, holding period, and income level. The 20% here is an illustration, not a rule — check guidance such as the IRS guidance on virtual currencies, or speak to a tax adviser.

Treating the whole sale as spending money

If you commit $102,000 to a business that only receives $89,592, you start $12,408 short on day one. Set the tax money aside at the moment of sale.

Conclusion

Calculating your real profit is a short exercise with a large payoff. Find your cost basis, subtract fees, tax the remaining gain, and only then call the result your startup capital. Test the maths at lower and higher prices, and budget from the conservative figure.

Ready to run your own numbers? Use the free crypto profit calculator on the Crypto Profit Calculator homepage to test your cost basis, sale price, fees, and tax rate before you sell.

This article is for educational purposes only and is not financial advice. Crypto prices are volatile, tax rules differ by jurisdiction and change over time, and your actual tax liability may differ from the examples shown. Do your own research and consult a qualified financial or tax professional before making any investment or business decision.