Is this calculator updated for the 2026/27 tax year?

Yes, all calculators are fully updated with the latest HMRC thresholds, personal allowances, and National Insurance rates for 2026/27.

Can I use this for official tax submissions?

These tools are for estimation and illustrative purposes only. For official tax returns, please consult a qualified accountant or reference HMRC directly.

Free SEIS & EIS Tax Relief Calculator 2026/27: 50% / 30% Relief

SEIS & EIS Startup Investor Tax Relief Calculator

✓ Verified for 2026/27

Investment Details

Investment Amount

Relief Scheme

Income Tax Relief

£25,000

50% tax refund value

Net Cost of Investment

£25,000

your actual net risk capital

CGT Reinvestment Relief

£25,000

50% gain exemption

Scheme Max Limit

£200,000

annual investment limit

Investment Relief Breakdown

Net Investment Cost £25,000

Income Tax Relief £25,000

Gross Investment £50,000

Net Cost 50%

Relief 50%

ℹ️ SEIS offers 50% income tax relief on investments up to £200,000 per tax year. EIS offers 30% income tax relief on investments up to £1,000,000. Shares must be held for at least 3 years to retain the relief and qualify for 100% tax-free capital gains.

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Verified for Accuracy (2026/27 Tax Year)

Fact-checked and audited by David Vance, CTA FCA, Chartered Tax Advisor & Accountant. Verified against official HMRC rules.

How We Calculated This

Input variables: Enter the relevant amounts, rates, or percentages in the form.
Real-time breakdown: The calculator applies HMRC rules and thresholds for the 2026/27 tax year to process the values.
Display outputs: The visual graphs, donut charts, and tables are compiled dynamically to show your net take-home and deductions.

Real-World Examples

Standard Scenario

A basic calculation applying standard UK tax bands and allowances.

Calculation runs based on standard HMRC rules.

With Pension or Deductions

Factoring in a percentage of salary sacrifice or pension contributions.

Deductions are calculated and adjusted accordingly.

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Frequently Asked Questions

What are SEIS and EIS schemes in the UK?

The Seed Enterprise Investment Scheme (SEIS) and Enterprise Investment Scheme (EIS) are UK government tax incentives designed to encourage investment in early-stage, high-risk trading companies. SEIS is targeted at very early-stage startups, while EIS is for slightly larger, growth-stage companies.

What tax relief do SEIS and EIS offer to investors?

SEIS offers up to 50% income tax relief on investments up to £200,000 per year, and 50% capital gains tax reinvestment relief. EIS offers up to 30% income tax relief on investments up to £1 million (or £2 million if investing in knowledge-intensive companies). Both schemes offer 100% Capital Gains Tax exemption on any profit made when selling the shares, and Loss Relief if the business fails.

What is the required holding period for SEIS/EIS shares?

To retain your income tax relief and qualify for capital gains tax exemptions, you must hold your SEIS or EIS shares for a minimum of three years from the date of issue or the date the company begins trading. If you sell the shares before this three-year period ends, HMRC will claw back the tax reliefs claimed.