United Kingdom — Startups · tax

HMRC Rejected SEIS Compliance Statement: What to Do in the UK

When HM Revenue & Customs refuses your startup's SEIS1 compliance statement, early-stage investors face losing their 50% income tax relief and capital gains exemptions. Under UK tax law, an HMRC refusal is a formal disallowance that triggers a strict 30-day statutory clock to challenge the decision or forfeit your investors' relief permanently. You must act immediately to lodge a valid appeal, preserve your company's position, and correct bureaucratic or legal misunderstandings.

The Statutory Framework and Why HMRC Refuses SEIS1 Statements in the UK

In the United Kingdom, early-stage startups rely on the Seed Enterprise Investment Scheme (SEIS) under Part 5A of the Income Tax Act 2007 (ITA 2007) to secure angel investment. Under Section 257ED of the Act, an issuing company cannot allow investors to claim tax relief until it submits a formal compliance statement (Form SEIS1) and receives authorization from HMRC under Section 257EC to issue compliance certificates (Form SEIS3).

HMRC's Venture Capital Reliefs Team routinely rejects SEIS1 submissions on rigid, technical grounds. Common statutory battlegrounds include alleged preferential rights attached to ordinary shares under Section 257CA (such as standard liquidation preferences in investor term sheets), failing to prove that at least 70% of the funds raised were spent on qualifying business activity or that trade had run for at least four months prior to submission (Section 257ED(3)), exceeding the £350,000 gross assets cap (Section 257DI), or breaching the age-of-trade rule.

HMRC caseworkers often apply narrow, administrative interpretations that disregard commercial realities. However, an HMRC caseworker's initial letter is not final law; it is merely an administrative determination that you have the statutory right to contest.

Your Right to Appeal: The Non-Negotiable 30-Day Statutory Clock

A formal rejection of your SEIS compliance statement is not the end of the road. Under Section 257EE of the Income Tax Act 2007, HMRC's refusal to authorise compliance certificates is treated in law as a decision disallowing a claim made by the company. This statutory provision immediately imports the appeal mechanisms of the Taxes Management Act 1970 (TMA 1970).

Under Section 31 and Section 31A of the TMA 1970, your company has exactly 30 calendar days from the date printed on HMRC's refusal notice to lodge a written notice of appeal. If you miss this deadline while attempting informal correspondence or email negotiations with the caseworker, HMRC can deem the matter settled, permanently depriving your investors of their SEIS relief.

Once a timely notice of appeal is submitted to the officer who made the decision, your company has statutory rights under Sections 49A to 49I of the TMA 1970. You can request an independent internal review by an HMRC officer unconnected with the original decision, or you can bypass internal review and notify your appeal directly to the First-tier Tribunal (Tax Chamber).

Challenging Administrative Errors vs. Substantive Legal Disputes

How you structure your challenge depends on whether HMRC rejected the statement due to a procedural clerical mistake or a substantive statutory dispute. If your startup committed an administrative blunder—such as mistakenly filing an Enterprise Investment Scheme (EIS1) statement instead of an SEIS1—tribunal precedent confirms that relief is not automatically forfeited. In Fashion on the Block v HMRC [2021] UKFTT, the First-tier Tribunal confirmed that where a company makes a genuine unilateral mistake and satisfies all underlying conditions, equitable rectification applies and HMRC cannot penalise the startup for a mechanical filing error.

If HMRC alleges a substantive breach—such as arguing that your Articles of Association grant anti-dilution or liquidation preferences that violate Section 257CA ITA 2007—the dispute turns on legal interpretation of your constitutional documents. Even where HMRC previously granted Advance Assurance, caseworkers often claim subsequent corporate changes revoked eligibility. You must review the share subscription agreements and Articles line by line to demonstrate that the shares are ordinary, non-redeemable, and carry no disqualifying preferential rights.

Navigating HMRC tax disputes requires precision and fast action. You can use Caunsel to research relevant sections of the Income Tax Act 2007, securely organize your investment agreements and HMRC correspondence in a digital case file, or list your matter to instruct an independent UK tax solicitor or barrister. Caunsel is a legal technology platform, not a law firm, and does not file appeals on your behalf.

Steps

• Check the postmark and letter date on HMRC's rejection notice immediately to calculate your strict 30-day appeal deadline under Section 31A TMA 1970.
• Identify HMRC's specific statutory ground of refusal by cross-referencing their letter against the conditions in Part 5A of the Income Tax Act 2007 (such as Section 257CA share rights or Section 257ED spending criteria).
• Draft and submit a formal, protective written notice of appeal to the HMRC officer named in the decision within the 30-day window, expressly citing Section 257EE ITA 2007.
• Gather supporting corporate records, including your Articles of Association, bank statements proving qualifying expenditure, and company accounts, to refute HMRC's assertions.
• Elect whether to request a formal statutory review under Section 49B TMA 1970 or notify your appeal directly to the First-tier Tribunal (Tax Chamber).

Common mistakes

• Engaging in informal email debates with the HMRC caseworker while letting the 30-day statutory appeal deadline expire.
• Issuing SEIS3 compliance certificates to investors without HMRC authorization, which is unlawful under Section 257EC(3) and exposes the company to penalties of up to £3,000 under Section 257EF ITA 2007.
• Assuming that an HMRC Advance Assurance letter guarantees approval, ignoring that caseworkers can revoke approval if final corporate documents diverge from the initial application.
• Accepting HMRC's claim that a clerical error (such as selecting the wrong scheme code on the portal) cannot be rectified.

Questions people ask

Can our startup issue SEIS3 certificates while an appeal with HMRC is pending?

No. Under Section 257EC(3) of the Income Tax Act 2007, an issuing company must not issue a compliance certificate without the express authority of HMRC. Issuing unauthorized certificates carries statutory penalties of up to £3,000 under Section 257EF and does not grant valid tax relief to your investors.

What happens if we missed the 30-day deadline to appeal HMRC's refusal?

If you missed the 30-day limit, you must make an application for a late appeal under Section 31A or Section 49G TMA 1970. You must demonstrate a reasonable excuse for the delay and show that the appeal was submitted without unreasonable delay once that excuse ceased.

Does having SEIS Advance Assurance protect our startup against an SEIS1 rejection?

No. Advance Assurance is merely an informal, non-statutory opinion based on the draft documents provided at the time. HMRC will review the executed Articles of Association, final shareholder agreements, and actual share issue date; if any term diverges or creates preferential rights under Section 257CA ITA 2007, HMRC will refuse the compliance statement.

General information only, last updated 2026-11-05. Caunsel is not a law firm and does not practise law. AI answers and this guide are not legal advice. Verify filings, deadlines, and statutes with a licensed lawyer in United Kingdom — Startups.