EIS Tax Relief 2026: The Complete Guide to Claiming What You’re Owed

Quick answer: EIS tax relief gives UK investors 30% income tax relief on investments up to £1 million per year in qualifying early-stage companies. You claim it via Self Assessment using your EIS3 certificate. Gains are CGT-free after 3 years, and losses can be offset against income. In 2024–25, over 33,000 investors claimed EIS income tax relief but many still leave money on the table.

Key Takeaways

• 30% income tax relief on EIS investments up to £1 million per year (up to £2 million for Knowledge-Intensive Companies)
• Zero CGT on gains if you hold EIS shares for at least 3 years and claimed income tax relief
• CGT deferral - you can defer gains from other asset sales by reinvesting into EIS shares
• Loss relief - if the company fails, you can offset your net loss against income tax
• Carry back - you can treat EIS shares as if issued in the previous tax year and claim against last year's tax bill
• EIS3 certificate - you cannot claim without it. Keep it safe
• Claim deadline - up to 5 years after 31 January following the tax year you invested

What Is EIS Tax Relief?

The Enterprise Investment Scheme (EIS) is HMRC's way of encouraging private investment into small, high-risk UK companies. The government rewards investors with a generous package of tax reliefs to offset the risk.

EIS income tax relief reduces your actual tax bill, not just your taxable income. That's a crucial difference. If you invest £20,000 in a qualifying EIS company, you get £6,000 taken directly off the income tax you owe HMRC. It's one of the most valuable tax reliefs available to UK investors.

According to HMRC's May 2026 statistics, "in the 2024 to 2025 tax year alone, 3,735 companies raised a total of £1,575 million through the EIS scheme. Around 33,220 investors claimed income tax relief through Self Assessment." These are not obscure, niche figures — this is a widely used, mainstream tax relief that many investors are already benefiting from.

If you're investing in early-stage companies and not claiming, you're simply paying more tax than you need to.

How Does EIS Tax Relief Work?

EIS tax relief works as a direct reduction to your income tax bill. The relief is calculated at 30% of the amount you invest, subject to annual limits.

Here's a straightforward EIS income tax relief example:

The relief reduces your tax liability for the year but it cannot take your tax bill below zero. If you don't have enough income tax liability to absorb the full relief, you lose the excess. You cannot carry unused income tax relief forward to a future tax year.

The full EIS tax reliefs package looks like this:

How Much Is EIS Tax Relief?

The rate of EIS income tax relief is 30%. The annual investment limit on which you can claim is £1 million, rising to £2 million if the amount over £1 million is invested in Knowledge-Intensive Companies (KICs).

You cannot claim EIS tax relief on more than you actually owe in income tax for that year.

EIS tax relief example with loss protection:

Say you invest £10,000 into an EIS-qualifying startup. The company later fails. Here's what your actual loss looks like:

• Investment: £10,000
• Income tax relief received (30%): −£3,000
• Net position after income tax relief: £7,000 at risk
• Loss relief (at 45% higher rate): −£3,150
• Total effective loss: approximately £3,850 on a £10,000 investment

That's the combination of income tax relief and loss relief working together. Even in the worst-case scenario, the government is sharing a significant portion of your downside. That's exactly what EIS investment tax relief is designed to do.

Who Can Claim EIS Tax Relief?

You can claim EIS tax relief if you:

• Are an individual UK taxpayer (not a company)
• Have subscribed for new, fully paid-up ordinary shares in a qualifying EIS company
• Are not connected with the company, meaning you don't hold more than 30% of its shares, voting rights, or assets, and are not an employee
• Hold the shares for at least 3 years
• Have received a valid EIS3 certificate from the company

You cannot claim if you subscribed as part of a tax avoidance scheme, received a linked loan, or had arrangements in place to protect your investment or guarantee an exit.

Paid directors are generally not eligible for EIS income tax relief, unless the business angel exemption applies. Unpaid directors can qualify.

What Is the EIS3 Form?

The EIS3 form (also called the EIS3 certificate or EIS3 claim form) is the compliance certificate issued by the company you invest in, not by HMRC. It confirms that the company has met EIS scheme conditions and authorises you to claim relief.

Important: HMRC does not issue EIS3 certificates. They come from the company. If you invested through an approved Knowledge-Intensive fund, the fund manager will issue you an EIS5 instead.

Your EIS3 certificate contains:

• The Unique Investment Reference (UIR), you'll need this to complete your tax return
• The date of share issue
• The amount invested
• Whether the company was a Knowledge-Intensive Company at the time

Keep your EIS3 certificate safe. You cannot claim EIS relief without it, and HMRC may ask you to produce it as evidence. If you receive your EIS3 after you've already filed your Self Assessment return, complete the claim form inside the EIS3 and send it directly to HMRC.

How to Claim EIS Tax Relief on Your Self Assessment Tax Return

Claiming EIS income tax relief is done through your Self Assessment return. Here's exactly where to enter it:

Step 1: Receive your EIS3 certificate from the company (you cannot claim without this)

Step 2: On your Self Assessment tax return, go to the Additional Information pages (SA101)

Step 3: Enter the total amount you're claiming relief on in Box 2 under the 'Other tax reliefs' section on page Ai 2

Step 4: In the 'Any other information' box (Box 19, page TR 7), list the details of each investment:

• The Unique Investment Reference (UIR) from your EIS3
• The company name
• The amount claimed for that year
• The date the shares were issued

Step 5: Submit your return. HMRC may request your EIS3 as supporting evidence, so keep the original.

How to Carry Back EIS Relief to a Previous Tax Year

EIS carry back allows you to treat some or all of your shares as if they were issued in the previous tax year, so you can claim income tax relief against last year's tax bill instead.

This is particularly useful if you had a higher income in the prior year, a larger tax liability, or you want to get a faster refund.

How to carry back EIS relief on your tax return:

• If you're carrying back shares issued in 2025–26 to 2024–25, enter the amount on your 2024–25 tax return in the relevant box
• Complete the claim form inside your EIS3 to show the amount claimed for the previous year and send it to HMRC separately
• Remember: the carry back is still subject to the annual limit for that earlier year (maximum £2 million, with no more than £1 million in non-KIC shares)

You can only carry back to the immediately preceding tax year - not further back. If you want to carry back shares from the 2025–26 tax year to 2024–25, you must already hold a valid EIS3 or EIS5 for those shares.

How to Claim EIS Loss Relief on Your Tax Return

If your EIS shares are sold at a loss (or become worthless), you can claim EIS loss relief to set that loss against your income - rather than only against capital gains.

The loss is calculated net of any income tax relief already received:

• If you invested £10,000 and received £3,000 income tax relief, your allowable loss is calculated on £7,000 (the £10,000 minus the £3,000 relief already given)
• You can then set this £7,000 against income in the year of disposal or the year before

Where to enter EIS loss relief on your tax return:

Go to the Capital Gains Tax summary pages (SA108), specifically the 'Unlisted shares and securities' section. This is where you record the disposal and the allowable loss.

If you want to set the loss against income rather than capital gains, you must elect for this separately within 1 year of 31 January following the tax year in which the loss was made. Don't miss that deadline.

When Can You Claim EIS Tax Relief?

You can claim EIS tax relief either:

• In the tax year the shares were issued, or
• In the previous tax year (carry back)
• The latest you can make a claim is 5 years after 31 January following the end of the tax year in which you invested.

For example: if you subscribed for EIS shares in May 2025 (tax year 2025–26), you have until 31 January 2032 to claim.

You cannot claim until you have received your EIS3 certificate. If there's a delay in receiving it, wait - do not claim without it.

TL;DR: EIS Tax Relief at a Glance

• 30% income tax relief on EIS investments up to £1 million per year
• No CGT on EIS gains after 3 years (if income tax relief was claimed and not withdrawn)
• CGT deferral available by reinvesting gains into EIS shares
• Loss relief - net losses can be claimed against income, not just capital gains
• Carry back - treat shares as issued in the prior year to claim against last year's tax bill
• Claim via Self Assessment - Box 2 (SA101, page Ai 2) for income tax relief; SA108 for loss relief
• You need your EIS3 certificate - no certificate, no claim
• Deadline - up to 5 years after 31 January following the investment tax year

How Debitam Can Help You Claim EIS Tax Relief

EIS tax reliefs are genuinely valuable. But the rules around certificates, carry back elections, loss relief deadlines, and Self Assessment entries catch people out - sometimes costing them thousands in unclaimed relief.

At Debitam, we've helped hundreds of investors and business owners make sure their EIS claims are accurate, complete, and filed on time. No jargon. No hidden fees. No last-minute surprises.

If you've made EIS investments and aren't sure whether you've claimed everything you're entitled to, get in touch with our team. We'll review your position and make sure you're not leaving money on the table.

FAQ about EIS Tax Relief

What is EIS income tax relief and how is it calculated?

EIS income tax relief is a 30% reduction in your actual income tax bill based on the amount you invest in qualifying EIS shares. For example, a £20,000 EIS investment gives you £6,000 off your income tax liability. The maximum investment on which you can claim is £1 million per year (or £2 million if over £1 million goes into Knowledge-Intensive Companies).

How do I claim EIS tax relief online through Self Assessment?

Log into your Self Assessment account and complete the Additional Information pages (SA101). Enter your total EIS investment in Box 2 of the 'Other tax reliefs' section on page Ai 2. In Box 19 on page TR 7, list each investment with its Unique Investment Reference, company name, amount claimed, and date of share issue.

Can I claim EIS tax relief for a previous tax year?

Yes. You can carry back EIS relief to the immediately preceding tax year by completing the claim form inside your EIS3 certificate and submitting it to HMRC. The carry back is still subject to the annual investment limit for that prior year.

Where do I enter EIS loss relief on my Self Assessment return?

EIS loss relief is entered in the Capital Gains Tax summary pages (SA108) in the 'Unlisted shares and securities' section. If you want to claim the loss against income rather than capital gains, you must elect for this within 1 year of 31 January following the tax year the loss was made.

What is the EIS3 certificate and where do I send the claim form?

The EIS3 form is a compliance certificate issued by the company you invested in, not by HMRC. It authorises you to claim EIS tax relief. The claim form inside the EIS3 is completed and sent to HMRC when you are carrying back relief or claiming outside your main return. Keep the original certificate; HMRC may ask for it.

What happens to EIS tax relief if the company fails?

If your EIS shares become worthless or are sold at a loss, you can claim loss relief on the net loss (your original investment minus any income tax relief already received) against either income tax or capital gains. For a 45% taxpayer, this can reduce the effective loss significantly, even on a total write-off.

When is the deadline to claim EIS tax relief?

You have up to 5 years after 31 January following the end of the tax year in which you made the EIS investment. For shares issued in the 2025–26 tax year, the deadline is 31 January 2032.

Who cannot claim EIS income tax relief?

You cannot claim if you are connected with the company, meaning you hold more than 30% of its shares or voting rights, or are an employee. Paid directors are generally excluded unless the business angel exemption applies. You also cannot claim if you subscribed as part of a tax avoidance arrangement or received a linked loan tied to the investment.