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Calculation Machine

Stock Profit Calculator

Profit, return and break-even on a trade.

Reviewed by James Whitfield · How we check our maths

Your values

ⓘ Live results

Results
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.

Worked example

Worked example

Using the values the calculator loads with.

Inputs

  • Shares150
  • Buy price42.50 $
  • Sell price57.80 $
  • Commission per trade0 $
  • Capital gains tax15 %

Result

  • 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

How to use the Stock Profit Calculator

  1. 1Enter the number of shares and your buy price.
  2. 2Enter the sell price and any commission.
  3. 3Add your capital gains tax rate for the after-tax figure.

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.

About this calculator