Seed Enterprise Investment Scheme (SEIS): what you need to know If you’re an early-stage UK company with fewer than 25 employees and big ambitions, you could be eligible for SEIS. Here's what you need to know. Written by Emily Clark Updated on 21 August 2025 Our experts We are a team of writers, experimenters and researchers providing you with the best advice with zero bias or partiality. Written and reviewed by: Emily Clark Writer For early-stage businesses with an ambition to grow with seed funding and pre-seed funding, the Government’s Seed Enterprise Investment Scheme (SEIS) is a great opportunity to raise early investment, attract risk-taking investors, and give your startup a solid financial boost.For years, Startups has been helping small businesses understand funding options, so that founders can make informed decisions, secure the right investors, and give their business the best chance to grow.If you’re dreaming big and looking for ways to take your startup to the next level, then the SEIS could be your ticket to getting things off the ground.In this guide, we’ll break down what SEIS means, its pros and cons, eligibility requirements, and how to apply, giving you everything you need to decide if it’s the right funding route for your business. 💡Key takeaways The Seed Enterprise Investment Scheme (SEIS) is a Government initiative that helps very early-stage startups raise capital.It is also designed to attract investors by offering significant tax incentives, reducing the risk of investing in new companies.To be eligible, you must be trading for less than three years, have under £350K in gross assets, and have fewer than 25 employees.Companies can raise a maximum of £250,000 through SEIS.SEIS can offer investors 50% income tax relief, exemption from capital gains tax, and a loss relief safety net.SEIS funds must be used for qualifying business activities and cannot be used for things like paying off debts or purchasing land. In this article, we will cover: What is the Seed Enterprise Investment Scheme (SEIS)? Advantages of SEIS Disadvantages of SEIS Am I eligible for SEIS? How to apply for the SEIS What is the Seed Enterprise Investment Scheme (SEIS)?The Seed Enterprise Investment Scheme (SEIS) is a government-backed initiative that helps startups and early-stage businesses secure business funding, giving them access to vital capital and allowing them to benefit from the expertise and guidance of experienced investors.It is also designed to attract angel investors and venture capitalist (VC) firms who are willing to take a risk on promising startups by rewarding them with generous tax incentives. Businesses can receive a maximum of £250,000 through the scheme.SEIS shouldn’t be confused with EIS (Enterprise Investment Scheme). While both offer tax relief to investors, they target different stages of a company’s growth. Unlike SEIS, which is for very early-stage businesses, EIS is for more established companies (usually trading for less than seven years). The amount you can get is higher as well, as it offers up to £5 million in funding for each year.How does it work?A very early-stage company can apply to HMRC for SEIS “advance assurance”. This reassures investors that their investment will qualify. To be eligible, the business must be trading for less than three years, have under £350,000 in gross assets, and employ fewer than 25 people.Once approved, angel investors, VCs, or even family and friends, can invest up to £200,000 per tax year under SEIS. Advantages of the SEIS schemeSEIS comes with some great perks for startups trying to get early investors on board. The main benefits are:1. Easier to raise moneyBeing approved for SEIS means that investors are more likely to back you because the tax breaks reduce their risk. Moreover, being able to raise up to £250,000 when you’re just starting out can help give your startup the early funding it needs to grow and get off the ground.2. Flexible use of fundsThe money raised from SEIS can be used toward key growth areas for a business, such as hiring employees, developing and refining products, or driving marketing campaigns to reach new customers. It gives founders the freedom to allocate funds where they’ll have the best impact.3. Government-backed stamp of approvalBeing approved for SEIS can make your business more credible. This is because it shows investors that you meet certain standards, which can help build trust and confidence when you’re raising early-stage funding.How is SEIS beneficial for investors?With SEIS, investors can receive 50% income tax relief on the amount invested. For example, if someone invests £20,000 into a business, they can knock £10,000 off their income tax bill.Additionally, if a business fails, investors can reclaim some of their investment by offsetting the loss against their income or capital gains tax. This makes investing in early-stage companies less risky and can encourage investors to take a chance on your business. Disadvantages of SEISWhile SEIS comes with obvious advantages, it’s not without its downsides. Here are some key disadvantages to keep in mind before deciding if it’s right for your startup:1. Comes with strict rulesNot every early-stage business will be eligible for SEIS. As mentioned earlier, your company must be less than three years old, have under £350,000 in assets, and employ fewer than 25 people. Also, even the maximum of £250K might not be enough if you need a bigger seed round.2. Administrative burdenSEIS isn’t something that you can get straight away. You’ll need to apply through HMRC for advance assurance and keep on top of the paperwork, which can take some time and effort. It’s not huge, but it’s something to be prepared for when you’re setting things up.3. Not for every investorIt’s important to note that SEIS only applies to UK taxpayers. This means that only UK-based investors can claim the tax relief, which can limit your options for potential backers. Keep this in mind if you’re hoping to attract international investors. Am I eligible for SEIS?Aside from the requirements mentioned earlier, there are other key criteria you’ll need to meet to be eligible for SEIS.According to Gov.uk, you can apply for the scheme if your business:Carries out a new qualifying tradeIs established in the UKIs not trading on a recognised stock exchange at the time of the share issueDoesn’t have plans to list on the stock market (become a quoted company) or become a subsidiary of another companyDoesn’t control another company, unless that company is a qualifying subsidiaryHasn’t been controlled by another company since the date of your business incorporationIt’s also important to note that you cannot use the SEIS if you’ve already received investment through the EIS or from a venture capital trust (VCT). How to apply for the SEISThe good news is that applying for SEIS is just a two-step process that involves both your business and investors. Here’s a rundown of how you can apply:Get advance assurance: You’ll need to submit a request for advance assurance through HMRC before seeking investment. You’ll also need to provide details about your business, plans, and how you’ll use the investment.Issue SEIS shares: Once investors are ready to put money in, you’ll provide them with SEIS-qualified shares. From there, you submit the SEIS compliance statement (Form SEIS1) to HMRC.What can I do with SEIS investment?Money from the SEIS must be spent on qualifying business activities. This usually includes things like preparing to start a business, developing your products/services, buying equipment, or covering running costs.SEIS investment cannot be used for paying off debts, buying land or buildings, or investing in another company. Case Study: The Adventure App - A Journey with SEIS Meet The Adventure App, a UK startup founded by Chris, an outdoor enthusiast with a passion for helping people explore nature’s wonders. Chris envisioned a mobile app that would connect adventure seekers with thrilling experiences and hidden gems across the country.To bring this dream to life, The Adventure App needed the funds to embark on its own journey of growth.Step 1: Laying the foundationIn the early stages, The Adventure App underwent a thorough review of SEIS eligibility criteria. As a UK-based startup with a focus on innovation and growth, they checked all the boxes, making them eligible for SEIS qualification.Step 2: SEIS qualificationWith paperwork in order and an innovative business plan in hand, The Adventure App was officially SEIS-qualified, opening doors to exciting opportunities for both the company and potential investors.Step 3: Attracting investorsThe Adventure App caught the attention of Emily, a venture capitalist with a keen interest in supporting startups that align with her love for outdoor adventures. Although she typically provided funding for female-founded startups, she was immediately captivated by the app’s potential to revolutionise outdoor experiences and saw an opportunity for a mutually beneficial partnership.Curious about The Adventure App’s SEIS qualification, Emily delved into the scheme’s details. The tax incentives offered through SEIS piqued her interest, making the investment opportunity even more compelling.Emily conducted thorough due diligence on The Adventure App, examining their business plan, financial projections, and market analysis. The SEIS qualification reassured her that the company had met certain standards, boosting her confidence in the venture’s potential.Armed with her research and driven by her passion for adventure and innovation, Emily decided to invest £50,000 in The Adventure App. With SEIS, she knew that she could claim 50% income tax relief on her investment, reducing her initial financial risk and making it an attractive opportunity for venture capital. The SEIS tax relief offered a win-win situation, reducing her financial exposure while supporting a promising startup.Step 4: Investor expertiseBeyond the financial investment (and in order to make the most out of it for both parties), Emily actively supported The Adventure App’s growth journey. Her network and industry knowledge opened doors to strategic partnerships and helped the company gain traction in the market. ConclusionThe SEIS can be a game-changer for early-stage startups looking to secure funding, attract investors, and kickstart their business’s growth.While there are rules around eligibility, the tax incentives and credibility it offers make it a great starting point for founders and entrepreneurs ready to take the next step.If you have a strong business idea and meet the criteria, the SEIS could be just the very thing to give your startup the push it needs to get off the ground and grow.If you feel your business may be eligible, you can apply to the SEIS scheme on the government website. Share this post facebook twitter linkedin Tags News and Features Written by: Emily Clark Writer Having worked in a startup environment first-hand as a Content Manager, Emily specialises in content around organisational culture - helping SMEs build strong, people-first workplaces that stay true to their core values. She also holds an MSc in Digital Marketing and Analytics, giving her the knowledge and skills to create a diverse range of creative and technical content. Aside from her expertise in company culture, her news articles breaks down the big issues in the small business world, making sure our SME audience stays informed and ready for whatever’s next. With a genuine passion for helping small businesses grow, Emily is all about making complex topics accessible and creating content that can help make a difference.