Case Study – Young Professional Using SEIS

Lucy is 30, a lawyer earning £120,000 in the 2025/26 tax year. She has already maximised her ISA allowance and recently realised a £20,000 capital gain from the sale of company shares.

Seeking to reduce her tax bill while building long-term wealth outside traditional wrappers, Lucy explores whether SEIS could form part of a tax-efficient investment strategy.

This case study shows how a £20,000 investment into the Symvan Technology SEIS Fund 3 could materially change her income tax and capital gains tax position, while providing exposure to early-stage UK technology companies within a high-risk, long-term framework.

Why Download the Case Study?

If you’re considering SEIS as part of a broader tax-planning strategy for higher earners, this case study provides essential clarity.

Inside, you’ll find:

• A full breakdown of Lucy’s income tax liability before and after SEIS

• How a £20,000 SEIS investment generates £10,000 of income tax relief

• How CGT reinvestment relief reduces her capital gains tax bill

• How CGT-free growth after three years enhances long-term return potential

• How loss relief can materially reduce downside risk

• Why SEIS is typically considered after ISAs and pensions are maximised

• The realistic risks, timelines and liquidity constraints investors must understand

This is a practical, numbers-led guide designed to support informed decision-making.

A Practical Guide to SEIS in the Real World

This case study is provided for illustrative and informational purposes only and does not constitute financial, tax or investment advice.

It offers a transparent, worked example of how SEIS can be used as part of a long-term, tax-efficient investment strategy when used appropriately and with full awareness of the risks involved.

Download the case study to explore Lucy’s tax position in detail and understand how SEIS works in practice.