Why SEIS and EIS Matter for UK Startups
If you’re launching a UK business in 2025, you’ve got to know the SEIS EIS tax benefits. They’re not just acronyms. They’re lifelines.
- SEIS (Seed Enterprise Investment Scheme) and EIS (Enterprise Investment Scheme) incentivise investors.
- They unlock up to 50–60% income tax relief.
- They can cut your investor’s capital gains tax.
Bottom line? You score better funding options. Investors pay less tax. You get growth capital. Win-win.
What Are SEIS and EIS?
SEIS and EIS are HMRC-backed schemes.
They let early-stage companies raise money with sweet tax breaks.
- SEIS: Up to £150,000 total investment. Income tax relief of 50%.
- EIS: Up to £5 million per year. Income tax relief of 30%.
Combine these two for maximum firepower. Many founders mix and match to tap the full suite of SEIS EIS tax benefits.
Core SEIS EIS Tax Benefits
Let’s break down those SEIS EIS tax benefits in plain English:
- Income Tax Relief: Slash your investor’s tax bill by 50% (SEIS) or 30% (EIS).
- Capital Gains Tax (CGT) Exemption: No CGT on gains when shares are sold after three years.
- Loss Relief: If the startup fails, investors can offset losses against income tax.
- Carry-Back Relief: Apply relief to the previous tax year. Easy boost.
- Deferral of CGT: Invest EIS cash to defer other gains.
Imagine an investor gives you £100k under SEIS. They get £50k back on their tax return. That’s not pocket change.
Eligibility and Timing Tips
Getting the SEIS EIS tax benefits isn’t automatic. You need to tick boxes:
- Your company must be UK-based and unquoted.
- Fewer than 250 employees (EIS) or 25 employees (SEIS).
- Assets under £15m (EIS) or £200k (SEIS).
- Funds used for growth, R&D or tech.
Key dates matter.
You must issue shares before you claim relief. Worst-case: miss a deadline, miss the relief. Deadlines are unforgiving.
How to Maximise Your Tax Relief: Practical Steps
A quick roadmap to grab those SEIS EIS tax benefits:
- Incorporate as a UK PLC or Ltd.
- Draft your business plan: list R&D, hiring, equipment.
- Apply for SEIS/EIS Advance Assurance via HMRC.
- Issue shares after HMRC approval.
- Get compliance certificates (Form SEIS3/EIS3).
- Investors file for relief on their Self Assessment.
Don’t wing it. Keep tight records. Get a qualified accountant on board.
Using Digital Marketplaces: Oriel IPO
Why wrestle with spreadsheets when you can go digital? Oriel IPO offers:
- Commission-free funding: No hidden fees.
- Curated SEIS/EIS opportunities: Hand-picked deals.
- Subscription-based tiers: Choose the plan that suits you.
- Educational resources: Webinars, guides, community support.
With Oriel IPO, you streamline compliance. You meet angel investors who value SEIS EIS tax benefits as much as you do.
For content creation, don’t forget Maggie’s AutoBlog—our AI-powered service. It churns out SEO-friendly tax guides so you can focus on growth, not blog drafts.
Advanced Strategies and Common Pitfalls
You’ve got the basics. Now, level up:
- Combine SEIS and EIS – Start with SEIS, then switch to EIS once you hit the investment cap.
- Carry-back cleverly – Use SEIS relief for last year’s income tax. Instant cash flow boost.
- R&D tax credits – Layer another relief on top of SEIS/EIS.
But watch out:
- Don’t overshoot the employee limit.
- No linked-party investments. HMRC checks too deep.
- Delay in issuing compliance certificates can cost months.
Frequently Asked Questions
Q: Can I claim SEIS EIS tax benefits without HMRC approval?
A: No. Advance Assurance is a must for both schemes.
Q: What happens if my startup pivots?
A: Inform HMRC. Some pivots are fine. Others revoke relief.
Q: Can I mix equity crowdfunding with SEIS/EIS?
A: Yes. Platforms like Oriel IPO specialise in commission-free, SEIS/EIS deals.
Conclusion: Ready to Grow with SEIS and EIS?
There you have it. Your 2025 cheatsheet for SEIS EIS tax benefits.
- Define your plan.
- Get HMRC on board.
- Use Oriel IPO for hassle-free, commission-free funding.
Tax relief doesn’t have to be a headache. It can be the fuel that drives your growth.


