The UK is one of the best places in the world to base a software or SaaS startup: a fast, cheap company formation, a generous R&D tax relief regime, the SEIS/EIS schemes that make you attractive to angel investors, and global credibility. But SaaS founders face specific issues — share structures for co-founders and investors, VAT on cross-border digital services, and protecting intellectual property. This guide walks through setting up the right way.
SaaS Startup Key Facts 2026
- Structure: a private limited company (Ltd) is the investor-standard vehicle
- Share classes: plan founder shares, an option pool and investor shares early
- R&D relief: qualifying software development can generate tax relief or credits
- SEIS/EIS: tax reliefs for your investors — get advance assurance
- Digital VAT: place of supply rules decide where you charge VAT
- IP: ensure code and trademarks are owned by the company, not individuals
Choosing the right structure
A private company limited by shares is the standard vehicle for a fundable startup — investors expect it, and it supports multiple share classes and an option pool. Incorporate early and get the founder split right in the share structure from day one; changing it after investors join is far harder. Non-resident founders can incorporate a UK company and still qualify for most reliefs if the company is UK tax-resident.
Founder shares, option pools and investors
Decide the founder equity split and put a vesting arrangement in place so shares are earned over time. Reserve an option pool (often 10–15%) for future hires. When investors come in, they receive shares — usually ordinary or a preferred class — diluting everyone. Getting the cap table and articles right early avoids expensive restructuring later.
R&D tax relief for software
Genuine software R&D — solving technical uncertainty, not routine coding — can qualify for R&D tax relief, reducing corporation tax or, for loss-making startups, generating a payable credit. This is one of the most valuable and most under-claimed reliefs for tech companies. Keep contemporaneous records of the technical challenges and staff time. See our R&D tax credits guide.
VAT on digital services
Selling SaaS across borders triggers place of supply rules. Broadly, B2B digital services are taxed where the customer belongs (reverse charge), while B2C digital services are taxed where the consumer is — meaning you may owe VAT in other countries or via the EU's One Stop Shop for EU consumers. Get your VAT position mapped before you scale internationally, not after.
Protecting your IP and going investor-ready
Ensure the company — not the founders personally or contractors — owns the source code, designs and trademarks, via proper IP assignment agreements. Combine this with clean cap table records, a shareholders' agreement, and SEIS/EIS advance assurance, and you present as genuinely investor-ready. Investors do due diligence on exactly these points.
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View company packagesFAQ
What company structure should a SaaS startup use?
A private company limited by shares (Ltd) is the standard, investor-expected structure. It supports multiple share classes, an option pool for employees, and future investment rounds. Set the founder equity split and articles up correctly early, as changes get harder once investors join.
Can a SaaS startup claim R&D tax relief?
Yes, if the work involves resolving genuine technical uncertainty rather than routine development. R&D relief can reduce corporation tax or, for loss-making startups, produce a payable credit. It is heavily under-claimed by tech companies, so keep records of the technical challenges and staff time involved.
How does VAT work for SaaS sold across borders?
Place of supply rules apply. B2B digital services are generally taxed where the business customer belongs via the reverse charge, while B2C digital services are taxed where the consumer is located, which may create obligations abroad or through the EU One Stop Shop. Map this before scaling internationally.
What are SEIS and EIS for startups?
SEIS and EIS are UK schemes that give your investors generous income and capital gains tax reliefs for backing qualifying early-stage companies, making your startup far more attractive to angels. Obtaining advance assurance from HMRC before a raise reassures investors that the relief should apply.
Who should own the intellectual property in a startup?
The company should own all source code, designs and trademarks, not the founders personally or any contractors. Use written IP assignment agreements to transfer everything into the company. Investors check this closely in due diligence, and gaps can derail or devalue a funding round.