Stock Profit Calculator
Profit, return and break-even on a trade.
Enter your values
Enter the shares you are working with.
Enter the buy price in $.
Enter the sell price in $.
Enter the commission per trade in $.
Enter the capital gains tax in %.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Net profit after tax
- $1,950.75
- Gross profit
- $2,295.00
- Return on investment
- 36%
- Break-even sell price
- $42.50
- Tax owed
- $344.25
- Total proceeds
- $8,670.00
Quick answer
Net profit is sale proceeds minus purchase cost and all commissions; break-even is the price that covers both fees.
At a glance
| What it does | Profit, return and break-even on a trade. |
|---|---|
| Category | Investing |
| Inputs needed | Shares, Buy price, Sell price, Commission per trade, Capital gains tax |
| Main output | Net profit after tax |
| Cost | Free — no sign-up, no download |
How to use the Stock Profit Calculator
- 1Enter the number of shares and your buy price.
- 2Enter the sell price and any commission.
- 3Add your capital gains tax rate for the after-tax figure.
Inputs explained
- Shares
- Enter the shares you are working with.
- Buy price($)
- Enter the buy price in $.
- Sell price($)
- Enter the sell price in $.
- Commission per trade($)
- Enter the commission per trade in $.
- Capital gains tax(%)
- Enter the capital gains tax in %.
Worked example
Using the values the calculator loads with:
Inputs
- Shares150
- Buy price42.50 $
- Sell price57.80 $
- Commission per trade0 $
- Capital gains tax15 %
Results
- Net profit after tax$1,950.75
- Gross profit$2,295.00
- Return on investment36%
- Break-even sell price$42.50
- Tax owed$344.25
- Total proceeds$8,670.00
Frequently asked questions
Do I owe tax on unrealised gains?
No — tax applies only when you sell.
What about long-term rates?
Holding over a year usually qualifies for lower long-term capital gains rates in the US.
What do I need to enter into the Stock Profit Calculator?
Just 5 values: shares, buy price, sell price, commission per trade, capital gains tax. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Stock Profit Calculator work out the answer?
Net profit is sale proceeds minus purchase cost and all commissions; break-even is the price that covers both fees. The working is shown step by step so you can verify the result by hand.
Is the Stock Profit Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.