How Long Do You Need to Hold EIS Shares for Tax Relief?

How Long Do You Need to Hold EIS Shares for Tax Relief?
Alan Bermingham

Alan Bermingham

10 Years of Expertise in Fintech Innovation

5 min read

Updated: 25 Jun 2025

5 min read

Updated: 25 Jun 2025

Let’s Break This Down Together...

Wondering how long you need to hold on to your EIS shares to keep those juicy tax reliefs?


Understanding the Enterprise Investment Scheme’s 3-year rule is essential if you want to avoid clawbacks and keep every penny of your tax savings. It’s not just about investing, it’s about timing.


But don’t worry! This guide walks you through exactly how long to hold EIS shares, why it matters, and what to watch out for along the way. Let’s go!


How Long Do You Need to Hold EIS Shares for Tax Relief?

Thinking about investing in the Enterprise Investment Scheme but confused about the holding period? You're not alone. The timing rules for EIS tax relief can seem tricky, but they're crucial to get right.

Introduction to the Enterprise Investment Scheme (EIS)

The Enterprise Investment Scheme (EIS) is a government initiative designed to boost investment in small, high-growth UK businesses by offering a suite of generous tax reliefs.


Through the EIS scheme, investors can access a range of tax incentives that help offset the risks of investing in early-stage, unquoted companies. These tax reliefs include 30% income tax relief on qualifying investments, capital gains tax relief on profits, and even inheritance tax relief, making EIS a powerful tool for tax-efficient investing.


By putting money into EIS qualifying companies, investors can not only support innovative British businesses but also reduce their own tax liabilities. For example, EIS investments can provide capital gains tax deferral, allowing you to postpone paying capital gains tax on other assets by reinvesting those gains into EIS shares.


Additionally, EIS shares can be exempt from inheritance tax if held for the required period, offering further estate planning benefits.


The combination of these tax reliefs makes the Enterprise Investment Scheme EIS an attractive option for those looking to balance high risk investments with significant tax advantages.

The 3-Year EIS Holding Period Rule

The short answer? You need to hold your EIS shares for at least 3 years to keep the tax relief.


This 3-year clock starts either from when the shares were issued or when the company started trading (whichever comes later).


Sell before the 3 years are up, and HMRC will want their money back through what they call a “clawback” of the relief you’ve already claimed. Selling before the required period also means you lose disposal relief and CGT disposal relief on your EIS shares, so any gains may become taxable.


There’s no sliding scale or partial relief for holding shares for, say, 2 years and 11 months. The rule is absolute. To claim relief, you must meet the full holding period requirement.

How Income Tax Relief Works with EIS

When you invest in EIS shares, you can claim 30% income tax relief on investments up to £1 million per tax year.


You receive income tax relief by claiming EIS income tax relief through your self-assessment tax return or, if you are paid via PAYE, by adjusting your PAYE tax code using the EIS3 certificate to claim EIS tax relief directly through the PAYE system.


This limit increases to £2 million if you’re investing in knowledge-intensive companies. If you have invested in knowledge intensive companies, your maximum investment eligible for relief increases accordingly.


You can claim this relief in the tax year you invest or carry it back to the previous tax year for added flexibility. You must claim EIS tax relief for the actual amount invested, not the amount of tax relief you wish to receive.


To keep this relief, you must hold those shares for the full 3-year period. There’s no wiggle room here.


If you sell even a portion of your shares early, HMRC will claw back the corresponding percentage of tax relief. The income tax relief claimed will be reduced, and your income tax bill or income tax liability may increase as a result.


Claiming income tax relief is essential to benefit from EIS tax reliefs, and you must keep records of the income tax relief claimed for each investment.

Capital Gains Tax Benefits and Timing

One of the biggest perks of EIS investments is the Capital Gains Tax exemption on any profits when you sell your shares.


This exemption only applies if you’ve held the shares for at least 3 years and claimed the income tax relief.


There’s also CGT deferral relief, which lets you postpone tax on other gains by reinvesting them into EIS shares. This is known as capital gains deferral relief, and you can claim capital gains deferral by completing the capital gains summary pages of your tax return.


The deferred gain becomes taxable when you sell your EIS shares, regardless of how long you’ve held them. Deferred gains are treated as chargeable gains in the tax year of disposal, and you may need to pay capital gains tax or pay CGT at that point.


I once helped a client who’d forgotten this distinction and was surprised when his deferred gain became taxable after an early sale. Timing matters tremendously.


Claiming deferral relief arose from reinvesting a capital gain into EIS qualifying shares, and the process for claiming EIS deferral relief must be completed within the relevant or future tax years.


Deferring gains can help manage your tax liability across future capital gains, but you must follow the correct procedures to claim relief.

Inheritance Tax Relief and EIS

One of the standout benefits of EIS investments is their potential to reduce your inheritance tax (IHT) liability.


EIS shares are typically exempt from inheritance tax if you have held them for at least two years and still own them at the time of your death. This means that, by investing in EIS qualifying companies, you can pass on more of your estate to your beneficiaries, free from the usual 40% IHT charge.


This IHT relief, also known as Business Relief, makes EIS shares a valuable addition to any estate planning strategy. Not only do you support growing UK businesses, but you also gain a powerful tool for preserving family wealth.


EIS investments can be combined with other tax planning approaches to further minimise your IHT liabilities, but it’s important to ensure you meet all qualifying conditions.


Consulting with a tax advisor can help you structure your investments to maximise iht relief and ensure your EIS shares remain qualifying for inheritance tax purposes.

What Happens If You Sell EIS Shares Too Early?

Selling before the 3-year mark triggers immediate consequences. There’s no grace period.


HMRC will claw back all the income tax relief you claimed on those shares. This becomes payable in the tax year of disposal, increasing your tax liability for that year, and you may need to repay any received income tax relief.


You’ll also lose the CGT exemption on any gains from those shares. You will not be able to claim relief on those gains if you sell early. This can significantly impact your returns.


The clawback amount is based on the amount you sell. If you sell half your holding early, you’ll lose half your claimed relief.

Are There Any Exceptions to the 3-Year Rule?

Yes, a few special circumstances won’t trigger a clawback. These are worth knowing about.


If the company fails, you can claim loss relief regardless of how long you’ve held the shares. This is known as EIS loss relief, and you can claim EIS loss relief by submitting the appropriate documentation to HMRC.


Death of the investor doesn’t trigger a clawback. The shares pass to beneficiaries with their tax advantages intact.


Certain company reorganisations where you receive new shares in exchange for old ones typically won’t reset the clock. Claiming relief in these situations may require additional forms or evidence.


These exceptions recognise that some circumstances are beyond investor control.

Understanding EIS Compliance

Ensuring EIS compliance is essential for both investors and companies to benefit from the full range of EIS tax reliefs.


For a company to qualify, it must meet strict criteria: it should be unquoted, employ fewer than 250 people, and have gross assets of less than £15 million before the investment. These requirements help target the scheme at genuine early-stage, high-growth businesses.


Investors also have to meet certain conditions to claim income tax relief, capital gains tax deferral, and inheritance tax relief. You must be a UK taxpayer and not be “connected” to the company, meaning you can’t have a significant financial interest or be an employee or director (with some exceptions).


Before investing, many companies seek advance assurance from HMRC, which gives investors confidence that the company is likely to qualify for EIS tax reliefs.


After your investment, the company will issue a compliance certificate (EIS3), which you’ll need to claim your tax reliefs on your self assessment tax return.


It’s crucial to work closely with both the company and your tax advisor to ensure all compliance steps are followed. This way, you can confidently claim income tax relief, defer capital gains, and secure inheritance tax relief, knowing your investment meets all the requirements of the enterprise investment scheme.

Record-Keeping for Your EIS Investments

Keep your EIS3 certificates safe. They prove when you made your investment and are essential for tax claims. You will need these certificates when claiming relief, such as claim EIS, claim tax relief, or claim EIS tax, and when completing the capital gains summary pages for capital gains deferral.


Document any partial sales carefully, noting dates and amounts. This helps calculate any potential clawback.


HMRC can ask for evidence up to 6 years after the relevant tax year. Good record-keeping is therefore essential for claiming income tax relief and other EIS-related reliefs.


If the company’s start of trade date differs from the share issue date, get written confirmation of this for your records.

Final Thoughts

The 3-year EIS holding period isn't just a suggestion, it's a firm requirement for keeping those valuable tax benefits.


Plan your investment timeline carefully, especially if you might need access to your capital before the three years are up.


With proper planning, EIS can offer remarkable tax efficiency while supporting growing British businesses.


Consider the holding period as part of your broader investment strategy, not just a tax technicality.

Pie tax: Simplifying EIS Holding Period Tax

Keeping track of multiple EIS investments and their holding periods can quickly become a headache for even the most organised investors


We securely store all your EIS3 certificates in one place, so you're never scrambling to find documentation when completing your tax return.


Curious to see how we can help with your EIS investments? Take a look at Pie tax to simplify your investment tax planning.


Your Step-by-Step Guide

Follow these easy steps to ensure your tax reliefs are accurately recorded for your self-assessment:

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Click 'Quick Add' in the Navigation Bar

Open the Pie Tax App and find the 'Quick Add' button in the middle of the navigation bar.

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Select 'Add tax relief'

After clicking 'Quick Add', select 'Add tax relief' from the screen to open the options menu.

Click here to learn more about how to add tax relief to your investments.

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