Advance Assurance

TL;DR

Non-binding HMRC pre-clearance that a UK company's planned share issue likely qualifies for SEIS or EIS, used to de-risk angel investment.

Advance Assurance is the letter UK founders get from HMRC before raising a SEIS/EIS round, confirming that — based on the business plan, share class, and use of funds submitted — HMRC expects to grant SEIS/EIS relief on the issuance. It isn't binding (HMRC can still refuse if facts on the ground change), but in practice almost every UK angel asks for it before signing a SAFE or term sheet.

The application is free, takes 4–8 weeks, and requires the latest accounts, business plan, share-class details, list of likely investors, and a covering letter that frames the 'risk to capital' condition. A refusal is a serious red flag and usually points to a fixable structural issue (wrong share class, ineligible activity, related-party investor) that should be cured before raising.

Worked example

A Manchester-based fintech submits its AA application in March alongside a pitch deck, latest accounts, and a list of three named angels. HMRC issues the letter in late April; the founders include a redacted scan of it in their data room and close a £350k SEIS/EIS round by end of May.

Common pitfalls

• Applying without naming any actual prospective investors — HMRC may reject as speculative.
• Submitting a business plan that overpromises 'guaranteed returns' and triggers risk-to-capital concerns.
• Letting Advance Assurance go stale — significant business changes (pivot, acquisition) can void it.

When this shows up in a pitch deck

Pitch decks for UK angels feature 'Advance Assurance secured' on the round structure slide; data rooms include the AA letter itself.

Related terms

• SEIS — UK tax-advantaged scheme giving angels up to 50% income-tax relief on up to £200k/yr invested into very early-stage UK companies.
• EIS — UK scheme offering investors 30% income-tax relief on up to £1m/yr (£2m if knowledge-intensive) in qualifying UK growth-stage companies.
• ASA (Advance Subscription Agreement) — UK SEIS/EIS-compatible alternative to a SAFE: cash paid up-front for shares issued at the next round, with a 6-month longstop to keep relief.
• SAFE — Y Combinator's Simple Agreement for Future Equity — a contract that gives an investor the right to equity in a future priced round, with no debt or interest.
• Term Sheet — A non-binding document outlining the principal terms of a proposed financing, used to align investor and founder before legal documents are drafted.

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