Five ways to lose your SEIS or EIS tax relief without realising it

Introduction

Most UK angel investors know the headline benefits of SEIS and EIS: income tax relief on investment, CGT exemption on gains, and loss relief if things go wrong. What’s less well understood is how easy it is to inadvertently lose that relief — sometimes years after the investment is made, and often through no fault of the founder.

These are five specific situations where SEIS or EIS relief can be lost, drawn from direct experience. Several of them are genuinely non-obvious, even to experienced investors.

Note: this is an investor’s perspective, not tax advice. Always get professional guidance on your specific situation.

1. The preference stack problem

SEIS and EIS shares must be ordinary, full-risk shares. They cannot carry preferential rights — including certain liquidation preferences — that would make them rank ahead of other shareholders on a wind-up.

The trap here is subtle. It’s surprisingly easy for a company’s articles or shareholder agreement to inadvertently grant preferential rights, particularly when US investors are involved in the round. US term sheets routinely include liquidation preferences that are standard in American venture investing but disqualify shares from SEIS/EIS under UK rules.

This has happened in practice: in one deal losing SEIS relief because a US VC structured a seed round preference stack in the standard American way, without realising the UK tax implications. In another deal, only close reading of the final documents at the last minute averted the same outcome. A healthy dose of paranoia is wise here.

2. SEIS shares must be issued before EIS shares

When raising under both SEIS and EIS in the same round, SEIS shares must be issued first — even if only by a single day. This typically means a two-stage close, which adds process complexity that many founders find unnecessary and frustrating.

The practical risk is that a company running a single close for a mixed SEIS/EIS round issues all shares on the same day. All shares then risk losing their SEIS status. The fix is straightforward — plan the close in two stages — but it has to be planned in advance, not corrected afterwards.

3. The £350,000 gross asset limit for SEIS

Under SEIS, the company’s gross assets must be below £350,000 at the time shares are issued — not at the time the investor transfers their cash.

This is particularly relevant for investments made via an Advance Subscription Agreement (ASA). The investor pays their money, the ASA converts to shares at a later date, and in the intervening period the company may have received further investment or grown its balance sheet enough to breach the £350,000 threshold. By the time shares are issued, SEIS eligibility is gone.

If investing via an ASA into a SEIS company, the timing of share issuance deserves close attention.

4. Owning too much, or being too involved

SEIS and EIS relief is unavailable to investors who own 30% or more of the company. This is rarely a practical issue at pre-seed where most angel stakes are well below this threshold — but in very small rounds it can become relevant.

More commonly relevant is the rule around paid directorships. If an investor is a paid director of the company before investing, they are ineligible for relief. The safer approach is to invest first, and become a director afterwards — at which point ‘reasonable’ director compensation is permitted. The order of operations matters.

5. Disqualifying business activities

Certain sectors simply do not qualify for SEIS or EIS, regardless of how the business is structured or presented. The list includes property development, commodity trading, hotels, care homes, and several others.

The risk here is not that founders are trying to game the system. It’s that some businesses operate across multiple activities, one of which may be disqualifying. A software platform with a property component, for example, may find that HMRC views the property activity as the primary business. When in doubt, get advance assurance from HMRC before raising.

The bottom line

SEIS and EIS are genuinely brilliant schemes for early-stage investing in the UK. But the rules are specific, occasionally counterintuitive, and the consequences of getting them wrong arrive years later when the relief is clawed back.

When in doubt: double-check. Or triple. Getting professional advice before completing an investment is cheaper than losing relief on the back end.

Originally posted on LinkedIn.