How SEIS and EIS tax reliefs work with crowdfunding campaigns

SEIS and EIS tax reliefs allow eligible UK investors to reduce their income tax or capital gains tax liabilities when they back qualifying early-stage companies through crowdfunding platforms. By designing your campaign correctly, you can make participation more attractive to individuals who value these incentives.

This guide explains the core principles, how to structure offers for maximum eligibility, and the practical steps UK founders and e-commerce sellers should follow. Rules and limits change regularly, so always verify the latest details on GOV.UK, with HMRC and the chosen platform before proceeding.

Understanding the basics of SEIS and EIS

SEIS (Seed Enterprise Investment Scheme) and EIS (Enterprise Investment Scheme) are government programmes designed to encourage investment in early-stage UK companies by offering tax reliefs to individual investors. SEIS typically applies to very early companies, while EIS can support slightly more established ones. Both require the company to meet specific qualifying criteria around trading activity, permanent establishment in the UK, and use of funds for a qualifying business purpose.

Investors who qualify can claim income tax relief on the amount invested and, in some cases, capital gains tax relief on disposal of shares. For crowdfunding, the investment is usually made through ordinary shares or, in some structures, through convertible instruments. The exact relief available depends on the investor's personal tax position and the company's compliance with the schemes. Because the rules evolve, founders must check current requirements directly with HMRC and the crowdfunding platform.

Why these reliefs matter for crowdfunding campaigns

Crowdfunding campaigns that are eligible for SEIS or EIS can appeal to a wider pool of investors who might otherwise hesitate to back unproven early-stage businesses. The tax incentives reduce the effective cost of investment, which can help campaigns reach their funding targets more quickly. For e-commerce sellers and founders in sectors such as retail technology or direct-to-consumer brands, this can be particularly useful when raising initial capital for inventory, platform development or marketing.

However, not every campaign automatically qualifies. Platforms often have their own due-diligence processes, and HMRC must advance-assure the company for the shares to be eligible. Structuring the campaign with these requirements in mind from the outset avoids later complications and wasted effort.

Steps to check and secure SEIS/EIS eligibility

Confirm your company is a qualifying trade. Most genuine e-commerce and technology businesses qualify, but certain activities such as property development or financial services are excluded. Review the latest GOV.UK guidance on permitted trades.
Ensure the company meets the size and age tests. Early-stage limits apply to gross assets, number of employees and time since first commercial sale. These thresholds change, so verify the current figures on GOV.UK.
Apply for advance assurance from HMRC. Submit detailed information about the business plan, how raised funds will be used, and the proposed share structure. This step is strongly recommended before launching any SEIS/EIS crowdfunding campaign.
Choose a suitable crowdfunding platform. Some platforms specialise in SEIS/EIS offers and handle much of the compliance paperwork; others do not. Compare current platform terms and their experience with tax-advantaged raises.
Prepare accurate documentation. This includes a clear business description, financial forecasts showing qualifying use of funds, and articles of association that support the issuance of new ordinary shares.

Completing these steps early reduces the risk of the campaign being delayed or having to exclude the tax relief later.

Structuring your crowdfunding offer for maximum eligibility

To keep SEIS and EIS status, the investment must generally be in new ordinary shares issued by the company. Preference shares or complex rights that protect investors disproportionately can disqualify the shares. Keep the share rights straightforward and equal for all investors in the round.

Decide early whether to raise under SEIS only, EIS only, or a combination. Many founders start with SEIS because it offers higher relief rates for investors, then move to EIS for subsequent rounds. The total amount that can be raised under each scheme is subject to limits that change; always check the latest caps on GOV.UK and with your platform. Clearly state in campaign materials that the offer is intended to qualify for SEIS and/or EIS, but include a prominent disclaimer that eligibility depends on final HMRC approval and the investor's own circumstances.

For e-commerce founders, demonstrate in the business plan that funds will be used for activities such as product development, stock purchases, digital marketing or team expansion rather than refinancing existing debt or paying dividends. This helps satisfy the requirement that money is employed for growth of the qualifying trade.

Practical campaign tactics and investor communications

Provide clear, factual information about the tax reliefs without overstating benefits. Explain that investors must hold shares for a minimum period to retain relief and that they should seek their own tax advice. Many platforms supply standard wording that meets regulatory expectations.

Segment your target audience. Some backers will be motivated primarily by the product or market opportunity; others will place significant weight on the tax advantages. Tailor updates and Q&A sessions to address both groups. For example, publish a simple breakdown showing how funds will be spent over the first 12-18 months, linking each item to growth milestones that also support ongoing EIS compliance.

Prepare for post-campaign administration. Once the round closes, the company must issue compliance statements (EIS1 and SEIS1 forms) to HMRC within the required timeframe so investors can claim their relief. Factor in the time and potential professional costs of this process when planning the campaign budget.

Common pitfalls and how to avoid them

Using the funds for non-qualifying purposes after the raise. Document intended use clearly and maintain records that can be shown to HMRC if requested.
Issuing shares with special rights that breach the 'risk to capital' or independence conditions. Stick to plain vanilla ordinary shares wherever possible.
Launching the campaign before receiving advance assurance. This risks having to remove the tax-relief messaging mid-campaign, which damages credibility.
Failing to update company information at Companies House promptly. Accurate and timely filings are part of maintaining eligibility.
Ignoring platform-specific rules. Some platforms require minimum or maximum raise amounts, specific legal structures, or additional investor protection measures that can interact with SEIS/EIS rules.

Regularly review the latest HMRC manuals and GOV.UK pages, as interpretations and requirements can shift. Many founders work with an accountant or corporate lawyer experienced in early-stage fundraising to reduce compliance risk.

Final considerations for UK founders

SEIS and EIS can be powerful tools when used correctly, but they are not a substitute for a compelling business proposition. Investors still need to believe in the product, team and market. Combine strong fundamentals with a tax-efficient structure to give your crowdfunding campaign the best chance of success.

Founders based in West Yorkshire or elsewhere in the UK can also explore local resources such as Loomworks in Liversedge for practical mentoring and a registered address while preparing their first raise. Focus on getting the fundamentals right, verify every detail against current official sources, and maintain clear records throughout the process.

Frequently asked questions

Can every UK crowdfunding campaign use SEIS or EIS?

No. The company must carry on a qualifying trade, meet size and age tests, and issue shares that satisfy scheme conditions. Advance assurance from HMRC is usually required before the campaign can legitimately advertise tax relief. Platforms also apply their own eligibility checks. Always confirm current rules on GOV.UK.

What is the difference between SEIS and EIS for founders?

SEIS is aimed at very early-stage companies and typically allows investors higher rates of income tax relief. EIS can be used by slightly larger or older companies. The two schemes have different limits on how much a company can raise and different rules on previous investment. Many founders begin with SEIS then progress to EIS in later rounds.

Do I need advance assurance before launching?

It is strongly recommended. Without it, you cannot confidently tell investors the shares will qualify. Applying for advance assurance involves submitting a business plan and financial information to HMRC. Approval gives you greater certainty when marketing the campaign.

How should I describe the tax reliefs in my campaign?

Be factual and include clear disclaimers that relief depends on the company maintaining qualifying status, the shares meeting scheme rules, and the investor's personal tax situation. Many platforms provide approved wording. Avoid promising specific tax outcomes or implying guaranteed relief.

What records must I keep after a successful SEIS/EIS crowdfunding round?

You must keep detailed records of how funds are spent, maintain accurate share registers, file timely compliance statements with HMRC, and ensure all Companies House filings remain up to date. These records may be reviewed if HMRC enquires into the investment. Good bookkeeping from day one makes this process simpler.