Launching a startup is exciting but one of the biggest challenges every founder faces is securing enough funding to grow. Building a great product or service is only part of the journey. Without effective marketing, even the most innovative businesses can struggle to reach customers and gain traction in a competitive market. This is where the Seed Enterprise Investment Scheme (SEIS) comes in. Introduced by the UK Government in 2012, SEIS was created to encourage investment in early stage businesses by offering generous tax relief to investors. While it isn’t a marketing strategy itself, it provides startups with the financial backing they need to invest in marketing, product development, recruitment and business expansion.
What is it and how does it work?
The Seed Enterprise Investment Scheme (SEIS) is a government backed initiative that helps eligible UK startups raise investment from private individuals. In return for investing in qualifying businesses, investors receive valuable tax benefits that significantly reduce the financial risk of supporting early stage companies. For founders, this means easier access to the funding needed to accelerate growth during the crucial first few years of trading. Instead of relying solely on revenue or traditional loans, startups can secure investment that allows them to build their business more quickly.
Marketing is one of the most common ways startups use SEIS funding. Under HMRC rules, the money raised must be spent on qualifying business activities that help the company grow, and marketing is often one of the most effective ways to achieve that. Many businesses use SEIS investment to launch paid advertising campaigns on platforms such as Google Ads, Meta (Facebook and Instagram), and LinkedIn, helping them reach new audiences and generate sales. Others invest in hiring experienced digital marketers, content creators or growth specialists who can develop long term marketing strategies.
SEIS funding is also frequently used to strengthen a company’s brand through professional website development, improved branding, public relations and high quality marketing materials. These investments help businesses build trust with potential customers while improving their visibility in an increasingly competitive marketplace. For many startups, marketing can be difficult to afford during the early stages because revenue is often limited. SEIS provides the financial support needed to invest in growth without relying on existing income.
Benefits of SEIS for Startups
SEIS offers significant advantages for businesses looking to scale. The investment raised through the scheme can be used across a range of business activities, including marketing and advertising, recruiting talented employees, purchasing equipment, investing in research development and expanding products or services. Eligible businesses can raise up to 250,000 GBP through SEIS, provided they meet the scheme’s requirements. The funds must generally be spent within three years of issuing the shares, ensuring that the investment is used to actively grow the business.
Many startups later progress to the Enterprise Investment Scheme (EIS) after reaching the SEIS funding limit. This allows businesses to continue raising investment as they mature and expand into larger markets.
Why Investors Choose SEIS
SEIS has become an attractive investment opportunity because of the generous tax incentive available to qualifying investors. Individuals can receive 50% Income Tax Relief on investments of up to 200,000 GBP per tax year, making startup investing significantly less risky than it would otherwise be. In addition, investors may benefit from Capital Gains Tax exemption if they hold their shares for at least three years. If an investment is unsuccessful, loss relief can reduce the financial impact, while Capital Gains Tax reinvestment relief may be available when gains are reinvested into eligible SEIS companies. These tax advantages encourage most private investment into innovative UK startups, helping entrepreneurs secure the funding they need to grow.
Not every business qualifies for SEIS. To be eligible, a company must generally be established in the UK, or have a permanent UK establishment and have been trading for less than three years. It must employ fewer than 25 people and have gross assets worth less than 250,00GBP. The business must not be listed on a recognised stock exchange and must be carrying qualifying trade. Companies that have already received investment through the Enterprise Investment Scheme (EIS) are generally not eligible for SEIS, and certain sectors, including banking, insurance, property development, leasing and many financial services are excluded from the scheme.
Who can Invest?
Investors must also satisfy HMRC’s eligibility requirements before claiming SEIS tax relief. HMRC (His Majesty’s Revenue and Customs) is the UK Government department responsible for collecting taxes and administering tax relief schemes such as SEIS. They set the rules for both businesses and investors to ensure the scheme is used correctly.
To qualify for SEIS tax relief, investors must invest as an individual rather than through a company, pay tax, own less than 30% of the company’s shares and not be employed by the business they are investing in. Company directors can still qualify in certain circumstances, provided they meet HMRC’s conditions.
Before seeking investment, many startups apply for HMRC Advance Assurance. Although it is not compulsory, Advance Assurance is a service offered by HMRC that provides an indication that a business is likely to qualify for the Seed Enterprise Investment Scheme. While it does not guarantee eligibility, Advance Assurance gives potential investors greater confidence that they should be able to claim the available SEIS tax relief if they choose to invest. As a result, many angel investors prefer businesses that have already received Advance Assurance, as it can make fundraising smoother and improve investors confidence before a funding round begins.
Why SEIS Matters for Marketing
Marketing is often one of the largest expenses for an early stage business. Without sufficient funding, startups may delay advertising campaigns, postpone website improvements, or limit customer acquisition efforts, slowing their overall growth and making it harder to compete in the marketplace. SEIS enables founders to invest in marketing much earlier by providing access to external funding. With this investment, businesses can build stronger brand awareness, improve their online presence, reach new customers through digital advertising, invest in professional branding and generate sales more quickly.
Rather than waiting until revenue grows, startups can begin scaling from day one, giving them a greater opportunity to compete with larger, more established businesses while building a sustainable foundation for long term growth.
SEIS is one of the UK’s most valuable funding initiates for early stage businesses, giving startups access to the capital they need to develop products, recruit talented employees and invest in marketing by encouraging private investment through generous tax incentives. Although SEIS is fundamentally a funding scheme rather than a marketing strategy, marketing is one of the most impactful ways businesses use the investment, whether that’s launching advertising campaigns, strengthening a brand, hiring marketing professionals or reaching new customers. For founders looking to secure investment, understanding the SEIS eligibility requirements and applying for HMRC Advance Assurance can significantly improve the chances of attracting investors and building successful, scalable business. By combining the right funding with a well planned marketing strategy, startups can build stronger foundations, accelerate growth and position themselves for long term success.
Sources
AlphaTradeZone. “Finger Pointing on the Tablet Screen · Free Stock Photo.” Pexels, 9 Nov. 2020, www.pexels.com/photo/finger-pointing-on-the-tablet-screen-5833312.
British Business Bank. “What Is the Seed Enterprise Investment Scheme (SEIS)?” British Business Bank, 1 Oct. 2025, www.british-business-bank.co.uk/business-guidance/guidance-articles/finance/what-is-the-seed-enterprise-investment-scheme-seis.
MacSween, Kirsty. “What Are SEIS and EIS? The Essential Guide | SeedLegals.” SeedLegals, 26 Mar. 2025, seedlegals.com/resources/what-is-seis-eis-an-essential-read-for-uk-startups.
