P&A New Website by Annan

Advance assurance is HMRC’s non-binding view that a planned SEIS share issue is likely to qualify, and most investors expect it before they sign a term sheet. It matters because sophisticated angels and seed funds rarely commit without seeing it first. Here’s what it does and doesn’t do:

Signals to investors that HMRC has reviewed your plans and sees no obvious barrier to SEIS qualification
Applies only voluntarily; there’s no legal requirement to obtain it before raising
Stops short of the actual compliance process: you still need form SEIS1 after shares are issued before investors can claim relief

Key Takeaways

Getting SEIS advance assurance right depends on complete documentation, a covering letter that directly answers HMRC’s conditions, and full disclosure of any uncertainty.

PointDetailsCheck eligibility firstConfirm trading age, gross assets under £350,000, and fewer than 25 employees before applying.Build the full document packBusiness plan, forecasts, accounts, cap table, and investor details reduce query risk.Write a targeted covering letterAnswer each qualifying condition directly rather than describing the business generically.Disclose uncertainty upfrontUndisclosed facts invalidate assurance faster than disclosed weaknesses ever do.Get professional preparationPriceandaccountants reviews applications against VCM conditions to cut HMRC queries and turnaround time.

What SEIS advance assurance is and where it fits in the process

Advance assurance sits at the very start of the SEIS lifecycle, before a single share has been issued. HMRC looks at your company, your trade, and your funding plans, then gives an opinion, not a guarantee, on whether the proposed issue would likely meet the conditions in the Venture Capital Schemes Manual. That opinion is entirely separate from the compliance statement (SEIS1) you submit later, and separate again from the SEIS3 certificates investors need to actually claim relief.

Why investors chase it so hard: SEIS gives them 50% income tax relief on up to £200,000 of qualifying investment per tax year, plus capital gains tax exemption after three years and reinvestment relief up to £100,000. Your company can raise a maximum of £250,000 under SEIS in total.

Advance assurance de-risks that relief for the investor before money moves
It’s a practical signal, not a legal entitlement
Without it, many seed investors simply won’t proceed, regardless of how good the pitch looks

Who can apply for SEIS and what makes a company eligible

Before drafting anything, check your company actually fits the box HMRC has built for SEIS. Miss one threshold and no amount of a polished covering letter will save the application.

The company must generally be within its initial years of trading and carrying on (or intending to carry on) a qualifying trade
Gross assets must not exceed the set limit immediately before the share issue
You need fewer than a specified number of full-time equivalent employees at the time of issue
Certain activities are excluded outright, including property development, financial activities, and most forms of dealing in land or shares
Previous EIS or VCT investment in the company can disqualify a subsequent SEIS raise, so check your cap table history carefully
A director, company secretary, or an authorised agent can submit the application. If you’re using an agent, HMRC needs written authorisation on file first

Founders sometimes assume “under three years” means since founding. It actually runs from when the company started trading, which can catch out businesses that sat dormant before launching.

Exactly what to prepare before you apply

HMRC won’t chase you for missing documents. It simply queries the application or rejects it outright, so build the full pack before you submit.

A business plan explaining what the company does, how it earns revenue, and why the money is needed
Financial forecasts covering at least the next two to three years, with a clear use-of-funds breakdown
Latest accounts, if the company has traded long enough to produce any
Memorandum and articles of association, plus your register of members and full capital structure
Draft investor documents, and, where required, the names of prospective investors
Details of any existing funding agreements, including prior SEIS or EIS activity
A covering letter that directly answers the qualifying conditions HMRC checks against

The precise list HMRC expects rarely changes, but the quality of how you present it varies enormously between applications.

Skip the generic “growth strategy” language; HMRC’s caseworkers want specifics on trade, assets, and headcount
Get your capital structure right first. A messy cap table is one of the fastest ways to trigger a query
If you’ve had prior investment, disclose it upfront rather than letting HMRC find it later

How to apply for SEIS advance assurance step by step

You can submit directly through HMRC’s online service or instruct an authorised agent to handle it on your behalf. Most founders raising for the first time benefit from the latter, simply because the covering letter is where applications succeed or fail.

Gather every document from the checklist above before you start the online form
Draft a covering letter that walks through each qualifying condition individually, rather than a general narrative about the business
Disclose anything uncertain rather than hoping it goes unnoticed. HMRC treats undisclosed facts far more harshly than disclosed weaknesses
Include investor names and expected investment amounts where you already have them lined up
Submit through the HMRC advance assurance service, or via your agent

A few practical notes worth knowing before you hit submit:

You don’t always need to name investors if the shares will be offered on a recognised platform or through certain listing routes, though most early-stage rounds still name known backers
Turnaround for a complete, well-prepared application commonly runs four to eight weeks, though this varies with HMRC’s workload
The single biggest cause of delay is an incomplete submission, closely followed by a covering letter that talks around the conditions instead of answering them directly
If HMRC queries your application, respond promptly and fully. Half-answered queries just restart the clock

What happens after HMRC grants advance assurance

Getting assurance is the reassurance stage, not the finish line. The real compliance work starts once shares are actually issued to investors.

Submit the compliance statement (form SEIS1) after the shares are issued, once the company has been trading for at least four months or has spent 70% of the funds raised
If HMRC accepts the statement, it issues an SEIS2 letter along with a Unique Investment Reference for that share issue
The company then provides SEIS3 certificates to each investor, which they attach to their own tax returns to claim relief
Advance assurance never removes an investor’s personal conditions. An investor connected to the company, for instance, may still fail to qualify even where the company itself is sound

Why advance assurance gets refused or invalidated

Advance assurance is discretionary and non-statutory. There’s no formal right of appeal if HMRC declines to give an opinion, which is exactly why the application needs to be right the first time.

Material changes to your plans between application and share issue, such as a pivot in trade or a change in funding structure, can invalidate an assurance that’s already been granted
Undisclosed facts are treated far more seriously than disclosed weaknesses; full disclosure is central to how HMRC forms its view
Weak covering letters that describe the business generically instead of answering the scheme conditions are the most common avoidable error
Missing investor details where they’re genuinely required, or documents that contradict each other (forecasts that don’t match the business plan’s use-of-funds section), routinely trigger queries
HMRC can refuse assurance even where a company appears technically eligible, if the caseworker can’t form a clear view from the facts submitted

Pro Tip: Before you submit, read your covering letter as if you were the HMRC caseworker with no prior knowledge of your business. If any condition isn’t answered in plain terms on the page, it will come back as a query.

How Price & Accountants prepares advance assurance applications

A structured review catches the errors that generic templates miss. At Priceandaccountants, applications go through a stepwise check against each condition in the VCM guidance before submission, rather than a single read-through at the end.

Cross-checking the business plan, forecasts, and covering letter so none of the three contradict each other
Reviewing the capital structure and prior investment history for anything that could disqualify the raise
Drafting the covering letter to answer each qualifying condition directly, in the order HMRC’s caseworkers actually check them

The result founders typically see is fewer follow-up queries from HMRC and a shorter path to a decision. Before contacting an adviser, it helps to have your latest accounts, cap table, and a draft of your funding use-of-funds ready, since that’s usually the first thing any review starts with.

What mattersWhyComplete documentationMissing items cause more delays than any eligibility issueCovering letter qualityAnswering conditions directly cuts down HMRC queriesCap table accuracyPrior EIS/VCT investment history can disqualify a raise

Editorial take: what founders get wrong about SEIS advance assurance

Most guidance on advance assurance treats it as a paperwork exercise: fill in the form, attach the accounts, wait for the letter. That’s backwards. The application is a diagnostic tool that tells you whether your funding plan actually holds together, weeks before you’ve spent time chasing investors with a story HMRC would reject anyway.

The conventional advice underestimates how much weight the covering letter carries. Founders spend days polishing a business plan and then write three generic paragraphs answering the qualifying conditions, when that letter is precisely what a caseworker reads first and judges the whole application against.

If there’s one thing worth prioritising above everything else on this list, it’s disclosure. Founders instinctively want to present the tidiest possible version of the business, but an assurance built on an incomplete picture is worth less than no assurance at all: it can be invalidated the moment plans shift, and investors who later discover gaps will trust the whole raise less, not just the paperwork.

— Rahamut

Get your SEIS application right the first time

Priceandaccountants is the practical alternative to drafting an advance assurance application alone and hoping the covering letter holds up. We specialise in early-stage tech and fintech founders, and we’ve taken more than 20 startups through funding and structuring processes, some now valued well over £50 million.

What that means in practice: your business plan, forecasts, and cap table get checked against the VCM conditions before submission, not after HMRC sends back a query. Our strategic advisory and tax planning service covers SEIS and EIS structuring alongside the wider financial picture investors will scrutinise, so the application isn’t built in isolation from your accounts. If you’re preparing to raise and want the paperwork done properly on the first attempt, get in touch with Priceandaccountants to talk through your funding plans before you submit.

SEIS advance assurance: a founder's guide to applying