EIS tax relief for US citizens works on the UK side only. The Enterprise Investment Scheme gives 30% UK Income Tax relief and a Capital Gains Tax exemption after three years (GOV.UK, 2026/27). The IRS recognises neither. A US citizen gets no US deduction for the investment, and pays US capital gains tax on a profit that the UK treats as exempt, usually with no foreign tax credit to offset it.
The Enterprise Investment Scheme (EIS) and the Seed Enterprise Investment Scheme (SEIS) are among the most generous reliefs HMRC offers. Advisers and platforms market them heavily to higher earners. However, the sums rarely allow for a second tax system. This guide explains how EIS tax relief for US citizens interacts with Form 1040, where the UK benefit is clawed back, and when the investment still makes sense.
How the UK reliefs work
HMRC sets out the investor rules in its guidance on tax relief for venture capital scheme investors. The figures below are for the 2026/27 UK tax year.
Income Tax relief
EIS gives Income Tax relief of 30% on up to £1 million invested in a tax year, or £2 million where at least £1 million goes into knowledge-intensive companies. SEIS gives 50% on up to £200,000. You can treat an investment as made in the previous tax year. The relief only reduces UK Income Tax you actually owe, and you must hold the shares for at least three years.
Capital gains reliefs
If you received Income Tax relief and hold the shares for three years, any gain on sale is free of UK Capital Gains Tax. In addition, EIS deferral relief postpones UK tax on another gain that you reinvest. If the company fails, loss relief lets you set the loss against income instead of gains.
EIS tax relief for US citizens: what the IRS sees
The Internal Revenue Code contains no equivalent scheme for shares in a foreign company. From the US side, you have simply bought shares in a private UK company with after-tax money.
| Feature | UK treatment (GOV.UK, 2026/27) | US treatment |
|---|---|---|
| Amount invested | 30% Income Tax relief (EIS) or 50% (SEIS) | No deduction or credit |
| Gain on sale after three years | Exempt from Capital Gains Tax | Taxable capital gain on Schedule D and Form 8949 |
| Deferral of another gain | UK tax deferred while EIS shares are held | No deferral; original gain taxed in the year of sale |
| Loss if the company fails | Loss relief against income | Capital loss; up to $3,000 a year against other income |
| Dividends | Taxable | Taxable; UK tax creditable |
The exempt gain is fully taxable in the US
A long-term capital gain is taxed in the US at 0%, 15% or 20%, as the IRS explains in Topic 409 on capital gains and losses. The 3.8% Net Investment Income Tax can apply on top, where modified adjusted gross income exceeds $200,000 for a single filer or $250,000 for a joint return, the thresholds set in section 1411 of the Internal Revenue Code. Because the UK charges no tax on the gain, the sale produces no foreign tax credit. Consequently, the US tax is a real cost, unless you hold passive category credit carryovers from other UK investment income.
US small business reliefs do not apply
Investors sometimes hope US reliefs will fill the gap. They do not. The gain exclusion for qualified small business stock in section 1202 requires a domestic C corporation, so a UK limited company cannot qualify. Likewise, the ordinary loss treatment in section 1244 applies only to domestic corporations. A loss on EIS shares is therefore a capital loss for US purposes.
How the UK relief can raise your US tax
The second problem is less obvious. Most Americans in the UK pay no US tax on their salary because UK tax is higher, and the foreign tax credit covers the US liability. Income Tax relief of 30% reduces the UK tax you pay. Therefore, it also reduces the credit.
Lower UK tax means a smaller credit
If a large EIS claim pushes your UK tax for the year below your US tax on the same income, the US collects the difference. In effect, part of the UK relief moves to the IRS. General category credit carryovers from earlier years often absorb the shortfall, so the outcome depends on your history. Our guide to the foreign tax credit carryover and Schedule B shows how to check what you hold.
Carry-back claims reopen an earlier US return
Treating the investment as made in the previous UK tax year produces an HMRC repayment for that year. If you already claimed a US credit for the tax now refunded, you must tell the IRS. Our guide to the foreign tax redetermination rules for UK refunds explains the process, and our foreign tax credit and double taxation page covers the wider rules.
PFIC and reporting risks
Early-stage companies bring US reporting issues that listed shares do not.
When a start-up is a PFIC
A foreign company is a Passive Foreign Investment Company if at least 50% of its assets produce passive income, under section 1297 of the Internal Revenue Code. A pre-revenue company that has just raised cash can meet that test. Section 1298(b)(2) contains a start-up exception for the first year a company has gross income, but it has conditions. In contrast, an EIS fund normally invests in your name, so each company is tested separately. A Venture Capital Trust is a listed investment company and is generally a PFIC. Our guide to the PFIC rules for Americans explains the consequences.
Forms to expect
Shares held directly, outside an account, are specified foreign financial assets. They go on Form 8938 if you exceed the threshold, which for a single filer living abroad is $200,000 on the last day of the tax year or $300,000 at any time (IRS, Form 8938 instructions). A holding of 10% or more can bring Form 5471 into play. Our US owners of UK companies page covers that form.
When EIS can still make sense
The scheme is not always a mistake for an American. The 30% Income Tax relief is real money if your credit carryovers are deep enough to absorb the lower UK tax. The loss relief softens a failure on the UK side. However, you should model the investment on the basis that the exit will bear US tax of up to 23.8%, and that you are backing the company on its commercial merits.
An illustrative case
Consider an illustrative US citizen in London who invests £50,000 in an EIS company in 2026/27. The figures are illustrative. She claims £15,000 of UK Income Tax relief. Her general category carryovers cover the reduced credit, so no US tax arises that year. Five years later she sells for £150,000. The UK charges nothing on the £100,000 gain. The US taxes the gain, measured in dollars, at 15% or 20% depending on her income that year, plus the 3.8% Net Investment Income Tax. With no UK tax on the sale and no passive carryovers, she pays the IRS between 18.8% and 23.8% of the dollar gain. Her combined result is still positive, but well below the UK-only projection she was shown.
Before you subscribe, book a consultation with our team. We model EIS tax relief for US citizens on both returns, including the credit position and the exit.
Frequently Asked Questions
Does the IRS recognise EIS tax relief?
No. The Enterprise Investment Scheme is a UK relief only. A US citizen receives no US deduction or credit for an EIS investment, and a gain that is exempt from UK Capital Gains Tax after three years remains a taxable capital gain on the US return.
Can a US citizen claim EIS relief in the UK?
Yes. A US citizen who is liable to UK Income Tax can claim EIS Income Tax relief of 30% on up to £1 million invested in a tax year (GOV.UK, 2026/27), provided the usual conditions are met. Citizenship does not affect the UK claim; it affects how the US taxes the same investment.
Do EIS shares qualify as qualified small business stock?
No. The exclusion for qualified small business stock in section 1202 of the Internal Revenue Code applies only to stock in a domestic C corporation. Shares in a UK limited company cannot qualify, so the US taxes the whole gain.
Is an EIS company a PFIC?
It can be. A trading company is not normally a Passive Foreign Investment Company, but a pre-revenue start-up holding mostly cash can meet the 50% asset test in section 1297 of the Internal Revenue Code. Each company should be reviewed in its early years, and a Venture Capital Trust is generally a PFIC.
Does SEIS work any better than EIS for an American?
The UK relief is larger, at 50% on up to £200,000 a year (GOV.UK, 2026/27), but the US treatment is the same. The IRS gives no relief for the investment and taxes any gain on sale. The larger UK relief also reduces UK tax further, which reduces the foreign tax credit available.
Can a US citizen living in the UAE use EIS relief?
Only to a limited extent. EIS Income Tax relief reduces UK Income Tax, so an investor resident in the UAE needs UK-source income that is taxed in the UK, such as UK rental profits, to use it. The US still taxes any gain on sale, and the UAE charges no personal income tax to credit against it.
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