The 2026/27 Tax Year: Why EIS and SEIS Are More Critical Than Ever for UK Investors
As we settle into the 2026/27 tax year, high-net-worth investors and their advisers are facing a rapidly shifting wealth management landscape. For years, traditional tax-planning vehicles have provided a stable bedrock for portfolio construction. However, a combination of recent legislative changes, frozen allowances, and shifting tax burdens means that historical strategies are being stress-tested like never before.
At OnePlanetCapital, we believe that the Enterprise Investment Scheme (EIS) and Seed Enterprise Investment Scheme (SEIS) have transitioned from being niche venture capital additions to becoming essential pillars of proactive tax and wealth planning.
If you are reviewing your allocation this year, here is why we believe EIS and SEIS should be at the forefront of your strategy rather than an afterthought.
1. The Fiscal Drag Squeeze
"Fiscal drag" has become one of the most powerful wealth-eroding forces in the UK. By freezing personal tax allowances and higher-rate thresholds during a period of wage and asset inflation, the government has silently pulled millions of individuals into the 40% and 45% income tax brackets.
As income tax burdens rise, the ability to offset those liabilities becomes incredibly valuable. We believe SEIS and EIS offer some of the most potent income tax mitigations available today. Investors have the potential to claim upfront Income Tax relief of 50% for SEIS and 30% for EIS on the amount invested. In an environment where the tax net is widening, utilising these reliefs can dramatically restructure your effective tax rate.
2. Navigating a More Punitive CGT Environment
Over the last few years, investors have felt the sting of a much harsher Capital Gains Tax (CGT) regime. With the annual exempt amount having been aggressively slashed to just £3,000, and effective rate for higher tax payers being 24%.
Both EIS and SEIS offer highly targeted mechanisms to manage CGT liabilities:
EIS Deferral Relief: Allows investors to defer an existing Capital Gains Tax bill (from up to three years prior or one year in the future) by reinvesting the gain into qualifying EIS shares.
SEIS Reinvestment Relief: Allows investors to completely exempt 50% of a recent capital gain from CGT entirely.
Tax-Free Growth: Furthermore, if the underlying early-stage companies succeed, any growth on your EIS or SEIS shares is generally 100% free of Capital Gains Tax upon exit.
3. The New Pension Threat: Inheritance Tax (IHT)
Historically, pensions have been viewed as the ultimate safe haven for intergenerational wealth transfer, as they traditionally sat outside of an individual's estate for Inheritance Tax purposes. However, with recent policy shifts bringing pensions increasingly into the IHT net, that long-standing strategy is being compromised.
For investors looking to protect their wealth from a 40% IHT hit, EIS and SEIS investments offer a highly efficient alternative. Because these investments qualify for Business Relief (BR), they generally become 100% exempt from Inheritance Tax after just two years of ownership, provided the shares are still held at the time of death. (Up to a limit of £2.5m)
4. The Evolving VCT Landscape
Venture Capital Trusts (VCTs) have long been the sister investment to EIS. However, with recent changes leading to a reduction in VCT tax income tax incentives from 30% to 20% this greatly changes the risk v reward profile of these vehicles.
While VCTs still play a role via dividend generation, EIS and SEIS offer a more direct, granular approach to early-stage investing.
They provide larger upfront income tax reliefs (particularly SEIS at 50%), immediate CGT mitigation tools that VCTs lack, and typically greater transparency into the specific foundational assets you are backing.
If you would like to discuss your investment strategy for the year ahead please contact the team at oneplanet.capital