What actually makes a pitch deck strong enough to win UK investment right now? What are investors looking for in 2026?"

There's a long answer to that; team, traction, market, defensibility, the usual list. But there's also a short answer that most founders underestimate, and it's become significantly more important now.

The short answer: lead with SEIS/EIS. Make it visible, make it credible, and make it early in the deck. Here's why that matters more now than at any point in the last decade and what an attractive pitch deck actually looks like when the tax structure is doing some of the heavy lifting.

The Enterprise Investment Scheme regime just had its most significant expansion since the scheme was created. From 6 April 2026, the company-side limits effectively doubled: -Annual EIS limit: £5m → £10m (£20m for Knowledge-Intensive Companies) -Lifetime EIS limit: £12m → £24m (£40m for KICs) -Gross assets threshold: £15m before / £16m after → £30m before / £35m after

For founders, this is genuinely transformative. Companies that previously bumped against the £12m lifetime ceiling at Series A or B now have meaningful headroom to keep raising through EIS.

Growth stage businesses that were too large for EIS under the old gross-asset test are suddenly back in scope. And the £20m annual KIC limit gives R&D-heavy tech and life sciences companies real room to run. SEIS, sitting underneath EIS for the earliest-stage rounds, is unchanged: £250k lifetime, £350k gross assets, under 25 employees, under 3 years trading. Investors still get the 50% income tax relief.

The Budget also extended both schemes (and VCT) through April 2035, removing any lingering uncertainty about whether the regime would survive. Combined, the package is expected to unlock around £100m of additional investment a year. If you're a UK founder fundraising in 2026, the UK tax landscape has never been more favourable.

The question is whether your pitch deck reflects that. Why this belongs in your pitch deck and where Most founders treat SEIS/EIS as administrative something the tax advisor or lawyers handle, mentioned in a footnote on the term sheet, surfaced when an investor asks. That's a missed opportunity.

An SEIS investor putting in £50,000 has an effective cost of £25,000 after income tax relief. If the company fails, loss relief takes the effective downside further still.

The government is, in real terms, underwriting a significant chunk of the risk. An EIS investor putting in £100,000 has an effective cost of £70,000 after relief, with full CGT exemption on disposal after three years.

When you stand in front of a UK angel and say "we're SEIS/EIS qualifying with Advance Assurance in place," you're not making a tax point.

You're telling them the math of the deal is fundamentally different from a non-qualifying one. You're telling them they can write the cheque with materially less risk.