Gains Cap UK Coming soon

Intelligent capital gains tax calculator.

Add your broker statements.
AI calculates tax estimate automatically.

How it works

01

Upload your statements

As many as you like, any broker, all at once.

02

Pick your income band

One question, only for a year whose gains are over the tax-free allowance.

03

Get your numbers

Your figure on screen, with the working behind it.

Sample calculation

2025-26 tax year
Example, not a real account
£1,920
Tax estimate
Proceeds
£48,000
Allowable costs
−£36,000
Net gain
£12,000
Losses brought forward
−£1,000
Tax-free allowance
−£3,000
Taxable gain
£8,000
£8,000 at 24%
£1,920
Tax estimate
£1,920