SEIS for Software Startups: The Clean Fit and the Catches

SEIS for software companies is the scheme’s cleanest fit. Software is the archetypal SEIS trade: young companies, low gross assets, obvious growth intent, and an activity nowhere near the excluded list. Most software startups sail through eligibility. The catches, when they come, hide in three places: licensing models that drift toward “receiving royalties”, grant funding that eats SEIS capacity, and a three-year trade clock that started earlier than the founder thinks. This guide covers the clean fit and each catch in turn.

Why SEIS for software companies works so well

Run a typical SaaS company through the conditions and almost every test passes on the first read. Gross assets under £350,000: a seed-stage software company owns laptops and code, comfortably inside. Fewer than 25 employees: yes. A new qualifying trade: writing and selling software is a qualifying activity. Risk to capital: a subscription product chasing a market is exactly the growth-and-risk shape HMRC wants to see. This is why software and technology dominate the scheme’s take-up, and why the HMRC statistics show information and communication as the largest sector year after year.

For most software founders, then, SEIS for software companies is not a “do we qualify?” question but a “what could quietly disqualify us later?” one. Three things, mainly.

Catch one: when licensing looks like royalties

The excluded activities list includes “receiving royalties or licence fees”. Read cold, that sounds like it bans software licensing, which would be absurd, and it does not. The legislation carves out the case that matters: royalties and licence fees attributable to intangible assets which the company itself created. A SaaS company licensing its own platform is fine. The trap is at the edges.

Structures that get questioned: a company whose revenue is licensing IP it bought in rather than built; a group where one entity holds the IP and another trades, splitting creation from exploitation; a “software” business that is really a white-label reseller of someone else’s engine. If the greater part of the trade is exploiting self-created intangibles, you are safe. If the IP arrived by acquisition or sits in a different company, take advice before the round, not after. The full excluded list and its edges are in the eligibility guide.

Catch two: grants that shrink the £250,000

The SEIS company limit is £250,000 of lifetime fundraising, and it is reduced by certain de minimis state aid received in the three years before the share issue. Software startups are heavy users of exactly that kind of support: innovation grants, some regional funds, certain accelerator awards. A company that took £50,000 of de minimis grant funding may have £200,000 of SEIS capacity left, not £250,000.

Two practical rules. First, keep every grant offer letter; each states whether the money is de minimis aid. Second, disclose the aid in the advance assurance application and let the capacity arithmetic be checked before investors commit. Note the boundary: Innovate UK grants are usually notified aid rather than de minimis, and R&D tax relief is not state aid for this purpose in the same way, but the classification is per scheme and per award. Check the letter, not the folklore.

Catch three: the trade clock started before you think

SEIS requires the trade to be less than three years old at the share issue. Founders count from incorporation, or from “when we got serious”. HMRC counts from when the trade began: broadly, when the company was open for business and making or actively seeking sales. For a software company that shipped an MVP early, took a pilot customer in year one, and then spent two years rebuilding, the clock has been running the whole time. And if the trade previously ran inside a predecessor vehicle (a founder’s consultancy, say) before moving into the company, the earlier period can count too.

The fix is diligence, not drafting: date the first revenue, the first invoice, the first sustained marketing push, and measure three years from there. If the window is tight, prioritise the SEIS round now; EIS remains available for years afterwards, as the sequencing guide explains.

The R&D interaction worth knowing

SEIS and R&D tax relief coexist happily; thousands of software companies claim both. The interaction to respect is factual consistency. Your R&D claim narrates deep technical uncertainty; your SEIS advance assurance narrates a growing trade. Both can be true, but the accounts, the business plan and the two applications must describe the same company. Where SEIS money directly subsidises specific R&D expenditure, that spend can affect which R&D regime applies to it, so have one adviser see both claims rather than running them in silos.

Shaping the SEIS for software companies round

The typical software SEIS round is £150,000 to £250,000 across a handful of angels, often with an EIS follow-on planned inside eighteen months. That plan changes three decisions today: ask for advance assurance covering both schemes in one application; keep the cap table clean (full-risk ordinary shares, no investor over 30%, founders not counting on relief for themselves since directors’ own subscriptions face the connection rules); and sequence any mixed money SEIS-first. The mechanics are in structuring the round and the four-step application guide, and the paper discipline that protects it all is in the evidence trail.

Sources

HMRC, Apply to use the Seed Enterprise Investment Scheme; HMRC Venture Capital Schemes Manual (excluded activities, state aid); HMRC venture capital scheme statistics. Figures correct as at 17 July 2026, checked against our rules and limits reference.