The purpose of this site is to help UK tax payers to calculate, and to keep track of, their capital gain (or loss) based on their share trades. This is important for effective tax planning and can potentially save you a significant amount on your tax bill. To use the capital gains calculator simply store your trades in a spreadsheet, or a simple text editor like Notepad, in a simple format.

Capital Gains Calculator

Anyone who has tried working through the Inland Revenue matching rules for share trades will know that the process can quickly become very complicated. This is especially true if you have made more than a couple of dozen or so trades, if you have taper relief to take into account or if one or more of your shares has changed status from a business asset to a non-business asset (or vice versa!) during the period of ownership. This calculator will make it easy.

Updated with new matching rules for tax year 2008 onwards

Tax Calculator

Use this simple calculator to work out your tax based on your capital gains and income. You can set the tax year to any of the last 6 years and the calculations are displayed to allow you to see if, for example, you are entering the 40% tax bracket.

Last Updated Dec 2008