What is SEIS and how can startups benefit?

Full Explanation

SEIS targets very early-stage companies (less than 2 years old, pre-revenue or minimal revenue). Individual investors receive 50% income tax relief on qualifying investments up to £100K per company per tax year — meaning a £50K investment results in £25K tax relief. For wealthy individuals, this is a significant incentive to support startups. Companies must have fewer than 25 employees, less than £200K raised in lifetime, and be developing a novel product/service. Capital gains are exempt from tax if shares are held 3+ years. For founders, SEIS is attractive because it reduces the effective cost of capital to investors (investors net equivalent of 100% return just from tax relief), making fundraising easier. However, SEIS compliance is strict: companies must maintain detailed records, demonstrate novel technology/business model, and avoid certain activities (financial services, property, etc.). Many founders use SEIS for founder rounds (pre-seed) because investors get immediate tax relief, making smaller cheques more attractive. SEIS has annual capacity limits; early investors in a calendar year have better odds of relief acceptance. For growth startups (Series A+), SEIS is no longer available and EIS (Enterprise Investment Scheme) becomes relevant.

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