Investing in early-stage companies in the UK comes with risk, but it also brings significant tax reliefs and the potential for meaningful financial returns. The Carbon13 SEIS Fund is designed for investors who want to back pioneering climatetech startups while taking advantage of the Seed Enterprise Investment Scheme (SEIS). Here’s what a £10,000 investment could look like.

Carbon13 Fund

Your tax relief on a £10,000 investment

The UK government introduced SEIS to encourage investment in early-stage businesses by offering some of the most attractive tax reliefs available. When you invest £10,000 in the Carbon13 SEIS Fund, you may be eligible for:

  • 50% income tax relief – Up to £5,000 can be claimed back against your tax bill.

  • 50% capital gains tax reinvestment relief – If you reinvest capital gains into the fund, up to £1,200 in CGT can be reduced.

  • 100% capital gains disposal relief – Any profits from selling SEIS shares after three years are tax-free.

  • 100% inheritance tax relief – SEIS shares are typically exempt from IHT after two years of ownership. They are a qualifying investment under Business Relief (BR).

These benefits significantly reduce the risk of investing, making SEIS one of the most tax-efficient ways to support early-stage businesses.

The potential returns from a £10,000 investment

While the tax reliefs are significant, the fund is targeting companies with a strong potential for growth. The Carbon13 SEIS Fund invests in a diversified portfolio of early-stage climatetech companies, selected for their potential to drive innovation and scale rapidly.

Carbon13 Fund

A growth scenario assumes that across a portfolio of eight companies:

  • One company achieves 15x return.
  • One achieves 5x return.
  • Two companies break even.
  • Four fail.

In this scenario, your £10,000 investment could generate:

  • £19,018 returned from portfolio exits.
  • £6,737 in tax relief, helping to mitigate downside risk.
  • Total potential return: £25,755 (excluding reinvestment relief).

Investing in the future of climatetech

Globally, the climate tech market size is projected to grow from $25.32 billion in 2024 to $149.27 billion by 2032, at a compound annual growth rate (CAGR) of 24.8% during the forecast period (source).

Investing in the Carbon13 SEIS Fund means backing businesses that are actively working to solve some of the biggest climate challenges. The fund has already supported companies that have collectively raised over £38 million in follow-on rounds, with an MOIC (Multiple on Invested Capital) of 1.65x from its first cohort.

With a single investment, you’ll gain exposure to a diverse portfolio of highly ambitious companies developing solutions for a sustainable future.

Why it makes sense to invest in SEIS now

With increasing demand for impact-driven investments and continued government support for SEIS, there has never been a better time to consider investing in high-growth early-stage companies. The Carbon13 SEIS Fund provides a curated opportunity to support climatetech innovators while benefiting from substantial tax incentives.

If you’re looking to combine financial opportunity with meaningful impact, learn more about investing at www.syndicateroom.com/carbon13-seis.

The Carbon13 SEIS Fund

Our latest investment opportunity is an SEIS fund focused on returns with purpose, building and backing early-stage businesses addressing Earth’s vital life support systems.

Carbon13 Fund

This fund, Carbon13's 7th SEIS fund portfolio, will invest in pre-seed companies that are expected to be eligible for SEIS, and enable investors to claim a suite of tax reliefs such as 50% income tax relief on up to £200,000 invested, and 50% exemption from capital gains that arise in the same year. Tax reliefs are subject to status and change.

Click the button below to view the fund and make an investment.

View the Carbon13 SEIS Fund

The Access EIS Fund

Our fund co-invests with proven angel investors to build large portfolios of hand-picked companies for our investors. It’s a high risk investment, and we can’t guarantee that every startup will be a unicorn, but we’re confident that our approach is the smartest on the market. Even better, we can show you the data to prove it.

If you’re interested and would like to find out the benefits of investing towards the start of the tax year, you can call us on 01223 478 558 and we'll be happy to answer any questions you might have.

Or, if you're ready to get started, click the button below:

View the Access EIS Fund

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Read our fund brochure for everything you need to know about Access EIS from the specifics of our innovative co-investment model to our fees, and how to invest.

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