GBIncome tax · 2026

🇬🇧 United Kingdom Investment Calculator

Calculate your United Kingdom investment calculator for the 2026 tax year. Get an instant breakdown of tax bands, rates, deductions, social contributions, and your net take-home pay.

Your details

Initial investment

Monthly Contribution

Expected Annual Return (%)

Investment Period (years)

Compounding Frequency

ISA (Tax-Free)Individual Savings Account - gains and income are completely tax-free. Annual allowance: £20,000.

Tax year

2026Current

Estimates only. Calculations run in your browser. This is not financial advice — confirm with a qualified adviser before acting.

Net amount

£97,923.85

Effective rate5.9%

Marginal rate24%

Net amount £97,923.85Income tax £55,531.38

Income tax breakdown

£55,531.38

YearRateContributionGrowth

Year 17%£0.00£3,975.95

Year 27%£0.00£4,263.38

Year 37%£0.00£4,571.58

Year 47%£0.00£4,902.06

Year 57%£0.00£5,256.43

Year 67%£0.00£5,636.41

Year 77%£0.00£6,043.87

Year 87%£0.00£6,480.78

Year 97%£0.00£6,949.28

Year 107%£0.00£7,451.64

Initial investment£55,000.00

Income tax− £55,531.38

Net amount£97,923.85

Estimates for the 2026 tax year. Last updated 2026-02-01. This is not financial advice — confirm with a qualified adviser before acting.

Important notes

UK Capital Gains Tax of 24% (higher rate) applied to gains above the £3,000 annual exempt amount. Basic rate taxpayers may pay 18% instead.
This projection assumes a constant annual return and does not account for inflation, fees, or market volatility.