The Founder’s Playbook: Navigating Innovate UK Smart Grants and the Delaware Flip without Voiding SEIS/EIS

A familiar sequence plays out in London and Cambridge deeptech. A spin-out or two-founder company wins an Innovate UK grant, raises a SEIS round from angels, follows with an EIS round, then meets a US lead investor whose term sheet opens with a request to “flip” into a Delaware parent. Each step is sensible on its own terms. Taken together, in the wrong order, they can cost the company its grant compliance and cost its UK investors their tax relief, sometimes years after the money was raised.

Below are the mechanics and a sequencing plan. Rules change often, so treat every threshold as correct at the time of writing and check current HMRC and Innovate UK guidance before acting.

The three clocks

Founders plan around runway. In practice three independent clocks are running, and conflicts arise where they overlap.

• The SEIS/EIS clock. Investors must generally hold their shares for at least three years from issue (or from the start of trading, if later) to keep their income tax relief. During that period the company must also keep meeting the qualifying conditions, including independence: it must not be controlled by another company. A sale, a change of control or a holding-company insertion inside the window can trigger withdrawal of relief.
• The grant clock. Innovate UK projects run to a fixed project plan, with quarterly claims, monitoring officer reviews and, typically, obligations that outlive the project end date. The grant offer letter is a contract, and it commonly requires Innovate UK’s consent before a change of control.
• The US investor clock. A US seed or Series A fund operates on its own deployment cycle. Few will wait eighteen months for a UK holding period to expire. If a flip is a condition of investment, the US clock tends to set the pace unless the founder has planned for it.

The tax relief is earned over three years but can be lost in a single completion meeting.

Innovate UK Smart grants: what they fund and what has changed

Smart was, for most of the past decade, Innovate UK’s open, sector-agnostic grant competition for ambitious, commercially focused research and development. Historically it funded projects of roughly 6 to 36 months, with awards from the tens of thousands of pounds up to around £2m for collaborative projects. In 2025 Innovate UK announced that Smart was being paused and restructured as part of a wider reshaping of its business support. At the time of writing founders should not assume that a Smart round with a given closing date or budget exists. Programme names, eligibility rules and budgets change. The authoritative list of live competitions is the Innovation Funding Service, and each competition brief overrides any general guide, including this one.

What tends to persist across Innovate UK competitions is the structure of match funding. Grants cover a share of eligible project costs (the intervention rate), and the business funds the balance. Historically the rates have depended on business size and the category of research:

The match funding is the first point of contact with SEIS and EIS. A small company winning a £500,000 experimental development grant at 45 per cent needs roughly £611,000 of its own money to complete a £1.11m project. That money usually comes from an equity round, and the equity round is usually SEIS or EIS.

Grants are also subsidies under the Subsidy Control Act 2022. Innovate UK awards are generally made under the Act’s principles or under a streamlined route, and the applicant will normally be asked to declare other subsidies received. Smaller awards may fall under Minimal Financial Assistance, which at the time of writing allows up to £315,000 over a rolling three-financial-year period. Keep a running register of every public subsidy received; it will be asked for again in due diligence.

How grants interact with SEIS and EIS

At the time of writing, the core SEIS company conditions are: the company may raise no more than £250,000 under SEIS in total; it must have gross assets of no more than £350,000 immediately before the SEIS shares are issued; it must have fewer than 25 full-time equivalent employees; and its trade must have started less than three years before the share issue. Advance assurance from HMRC is optional but, in practice, most angels will not invest without it.

The gross assets trap

The £350,000 limit is a gross test. It counts cash in the bank regardless of whether that cash is owed back or earmarked for a project. Grant money paid in advance, or a large claim reimbursement landing a few days before completion, sits on the balance sheet as cash. The corresponding deferred income is a liability, but liabilities do not reduce gross assets.

The fix is sequencing: issue SEIS shares before material grant cash arrives, or time grant claims to follow completion. The shares must actually be allotted before the cash lands, not merely agreed.

SEIS before EIS, on different days

SEIS shares must be issued before any EIS shares, and not on the same day. A combined “SEIS and EIS” round therefore needs two completions, at minimum a day apart, with SEIS first. If EIS or VCT shares have been issued at any earlier point, SEIS is no longer available at all.

EIS limits and the April 2026 changes

EIS has its own company limits on annual and lifetime investment, gross assets, employee numbers and company age, with more generous limits for knowledge-intensive companies, which many deeptech start-ups qualify as. The Autumn Budget 2025 announced higher EIS company limits taking effect from April 2026. Because the detail matters at the margin, check HMRC’s current Venture Capital Schemes Manual and gov.uk guidance for the figures that apply on your issue date rather than relying on summaries.

The Delaware flip mechanics

A flip turns the UK company into a subsidiary of a newly incorporated Delaware corporation. The usual route is a share-for-share exchange: every UK shareholder transfers their UK shares to the Delaware company in return for Delaware stock in the same proportions. The UK company keeps its contracts, grant, IP and employees; it simply has a new parent.

UK capital gains: s135 and s138

For UK-resident shareholders, section 135 of the Taxation of Chargeable Gains Act 1992 normally treats a share-for-share exchange as a non-disposal: the new shares stand in the shoes of the old, and no capital gains tax arises on the exchange. Section 137 removes this treatment where the exchange is not for bona fide commercial reasons or forms part of tax-avoidance arrangements. To obtain certainty, the company can apply for clearance under section 138. HMRC aims to respond within 30 days; the commercial rationale is typically that a US parent is a condition of the lead investor. Stamp duty on the transfer of UK shares may be relievable where the conditions of the share-exchange relief in the Finance Act 1986 are met; this needs separate analysis.

Why the flip typically breaks SEIS and EIS

Capital gains rollover is not the same thing as income tax relief. Inside the three-year period, a flip can damage SEIS and EIS relief in several ways at once:

1. Disposal. The exchange is, for SEIS/EIS purposes, a disposal of the original shares unless a specific share-exchange rule applies.
2. Independence. After the flip, the UK company is controlled by another company, which the qualifying conditions prohibit during the relevant period.
3. Arrangements. If a flip was already in contemplation when the SEIS or EIS shares were issued, HMRC may treat the relief as never available.

The legislation does contain provisions under which relief can survive a share exchange into a new holding company, broadly where the new company acquires all the shares, issues only its own shares as consideration, mirrors the existing share structure, and itself meets the relevant conditions. These conditions are narrow. A typical US flip, in which the lead investor subscribes for preferred stock at the same time or the cap table is restructured, rarely fits them cleanly. HMRC’s treatment of a non-UK holding company is fact-specific, and the qualifying company must have a UK permanent establishment, which a Delaware parent with a UK operating subsidiary may or may not satisfy depending on how the group is run. Advance assurance does not extend to a later flip. Assume relief is at risk until a specialist has confirmed otherwise in writing.

EMI options

Existing Enterprise Management Incentive options over UK shares do not automatically survive the flip. The EMI legislation permits replacement options over shares in the acquiring company, granted within a limited window (generally six months from the change of control) and on economically equivalent terms. Missing the window, or granting replacements that are worth more than the originals, can cause the options to lose their EMI status.

409A valuation

Once the parent is a US corporation, options granted to US-taxable employees need a strike price at or above fair market value under section 409A of the US Internal Revenue Code, usually supported by an independent valuation. UK employees can still receive EMI-qualifying options if the conditions are met, but the company now runs two valuation processes: an HMRC-agreed EMI valuation and a 409A report.

QSBS, and why it only starts at the flip

Qualified Small Business Stock under section 1202 lets US holders exclude gain on stock in a domestic C corporation. The One Big Beautiful Bill Act, signed on 4 July 2025, amended the regime for stock issued after that date: a tiered exclusion of 50 per cent after three years, 75 per cent after four and 100 per cent after five; a per-issuer cap raised to $15m (or ten times basis, if greater); and an aggregate gross assets test raised to $75m. Shares in a UK private limited company are not QSBS, so the QSBS holding period can only start once Delaware stock is issued. Where stock is received in exchange for non-QSBS property, the exclusion generally applies only to gain above the value at the exchange date. For US-based founders and US angels, a later flip means a later and smaller QSBS benefit; for UK-resident founders, QSBS is usually irrelevant, since the UK taxes their gains regardless.

Decision framework: flip, wait or stay

There are three realistic structures, and the right one depends on where the revenue, the team and the next three rounds of capital will be.

On the partial route, a binding commitment to flip made at or before an EIS issue can itself be a disqualifying “arrangement”, and the instrument must not give the US investor control rights that breach the qualifying conditions in the meantime.

The UK-parent-plus-US-subsidiary route is underrated: it keeps SEIS/EIS, EMI and the grant intact. The cost is friction with funds whose policy prefers US issuers, and no QSBS for US holders. Ask the specific fund.

An illustrative sequencing timeline

The timeline below assumes a knowledge-intensive company that wins a grant, raises SEIS and EIS, and then takes a US seed. All dates are relative and illustrative, not a recommendation for any specific company.

The key choices: SEIS completes before grant cash lands, EIS follows on a separate day, and US seed money arrives without a pre-agreed flip.

A costed checklist

Fee ranges below are desk estimates for a straightforward early-stage company using mid-market advisers in London. They vary widely with complexity, the number of shareholders and whether US counsel is involved.

On these estimates, an uncomplicated flip costs roughly £30,000–£95,000 all-in. Weigh that against the value at stake: if £250,000 of SEIS was raised, investors’ 50 per cent income tax relief is worth up to £125,000, before any capital gains exemption.

This article is general information, not legal or tax advice. Rules and programmes change; take specific advice on your own facts before acting.