The SEIS Evidence Trail: Why Good Rounds Fail on Paper

Here is the uncomfortable pattern in SEIS failures: the companies usually qualified. The trades were genuine, the investors were clean, the money was spent on the business. What failed was the paper. Relief is granted, defended and withdrawn on evidence, and the evidence gets created (or lost) at half a dozen specific moments that nobody owns unless someone decides to. This analysis maps the SEIS evidence trail: what HMRC expects to see, when each document is born, and where good rounds go missing on paper.

The thesis: eligibility is a fact, relief is a file

Every SEIS condition is tested at a moment: gross assets immediately before the issue, trade age at the issue, cash before allotment, spend within three years, status held for three. A condition met but unevidenced is, for practical purposes, unmet, because years later the only witness is the file. HMRC does not attend the board meeting; it reads the minutes. The question that should organise a round is not “do we qualify?” but “could a stranger prove we qualified from our documents alone?” That reframing is the whole discipline, and it is cheap at round time and ruinously expensive afterwards.

The six moments SEIS evidence is born

Moment one: before the round. The eligibility file: management accounts dated immediately before the issue showing gross assets under £350,000, an FTE headcount calculation, the trade-start analysis (first invoice, first sustained marketing), the grant letters with their state aid classification, and the cap table proving no prior EIS or VCT money. Most of these documents exist anyway; the discipline is freezing them as at the right date.

Moment two: advance assurance. The application and HMRC’s response become the round’s constitution. Everything later gets compared with them, so file the final submitted version, not the draft, along with every piece of correspondence.

Moment three: the money. Bank statements proving each subscription arrived in cash, from the named investor, before allotment. Where an advanced subscription agreement is involved, the signed agreement with its no-refund, no-interest, six-month-longstop terms, and evidence of the conversion date.

Moment four: the issue. Board minutes resolving to allot, the register of members entry (the legal moment of issue), the SH01, and the subscription documents, all telling one dated story. This is the moment most rounds fumble: minutes written months later “as of” a date, registers never updated, filings that contradict the register.

Moment five: the spend. The ledger connecting SEIS money to qualifying activity: not forensic accounting, just a clean account trail and outgoings consistent with the business plan HMRC saw. This file also drives the 70% gate arithmetic for the SEIS1.

Moment six: the three years. A slim ongoing file: annual confirmation that the trade continues, notes on anything touching the danger list (buybacks, loans repaid to connected parties, acquisitions, new share classes), and investor communications about their own status. The failure modes this file prevents are catalogued in common mistakes that break SEIS status.

How evidence actually goes missing

Not through fire or fraud. Through founder turnover (the person who “had it all in email” leaves), through platform churn (the data room subscription lapses, the accountant changes systems), through informality (decisions made in WhatsApp, minutes never written), and through success (the company raises a Series A, the new lawyers repaper everything, and the seed-round file is nobody’s job). Notice that every one of these is a governance failure, not a tax failure. The fix is correspondingly unglamorous: one named owner of the SEIS file, one storage location, one index, reviewed once a year until each investor’s third anniversary passes.

What HMRC actually does with the file

Three encounters. At SEIS1, HMRC cross-checks the compliance statement against the assurance application and public filings; divergence triggers correspondence, and correspondence costs weeks, as the processing times guide shows. In a compliance check, which can arrive years later, the burden sits with the company and the investors to demonstrate the conditions held; the file answers in an afternoon what reconstruction answers in months, if at all. And at the investor’s end, the SEIS3 certificate plus their own subscription evidence is what stands behind the claim on their return. Weakness anywhere in the chain surfaces at whichever encounter comes first.

The investor’s copy of the trail

Investors should hold their own thin file rather than trusting the company’s: the subscription agreement, the payment record, the share certificate, the SEIS3 when it arrives, and a note of the company’s SEIS2 date. Two reasons. First, claims and any later loss relief or disposal calculations run off these documents, per the claiming guide. Second, if the company fails, its records fail with it, and a negligible value or loss relief claim is far easier with papers in hand than with a liquidator’s inbox. Five documents, one folder, ten minutes at subscription time.

The one-page version

An SEIS evidence file, complete: pre-round eligibility snapshot (accounts, headcount, trade-age analysis, grants, cap table); the assurance application and response; per-investor money proof; issue pack (minutes, register, SH01, subscriptions); spend ledger; SEIS1, SEIS2 and copy SEIS3s; three-year log. Owner named on the cover. If your round cannot produce one of these, that gap is this week’s task, because paper decays politely and claims arrive rudely.

Sources

HMRC, Seed Enterprise Investment Scheme guidance; HMRC Venture Capital Schemes Manual (compliance and withdrawal); Companies Act 2006 record-keeping requirements. Correct as at 17 July 2026, checked against our rules and limits reference. Education, not advice.