Are Prop Firms Legal in the UK? What Founders Should Know

The UK is an easy place to form a company and a careful place to market a trading-adjacent product. Companies House charges £100 to register a company online. The harder part is what you can say, and who can say it for you.

That matters because prop firms sell mostly through affiliates and creators, not ads. Google limits ads for CFDs and rolling spot forex to certified, licensed advertisers, and Meta treats financial products as a restricted category. In the UK, the people who replace those ad channels, influencers and comparison sites, are exactly the people the FCA's social media guidance addresses.

Which UK rules matter most?

• Financial promotions: the FCA's FG24/1 (March 26, 2024) warns that unauthorised persons, such as influencers, promoting a regulated financial product without approval may be committing a criminal offence. Whether a prop evaluation is caught is for a lawyer.
• Advertising: the ASA expects affiliate content to be obviously identifiable as advertising, which may mean an "Ad" label in the title when a whole piece is affiliated.
• Consumer law: refund rights, subscription terms and unfair-terms rules apply to UK customers.
• AML and KYC: payment processors and banks will expect identity checks, typically at payout.

Is regulation coming?

Not on any visible timetable. A UK Parliament petition asking for "FCA regulation of proprietary trading firms" opened on January 26, 2026 and closed on July 26, 2026 with 24 signatures, far below the 10,000 needed for a government response. That doesn't rule out future action, but there is no consultation we could find.

What should a UK founder do?

• Write affiliate terms that require clear "Ad" disclosure and ban income claims.
• Give creators pre-approved copy that uses "simulated" and "evaluation".
• Have a UK lawyer review your terms, risk disclosure and promotions before launch.
• Choose your payment processor early: Stripe lists "funded prop trading" as a prohibited business, so most firms use specialist processors.

Questions

Sources

1. GOV.UK: Register your company
2. FCA FG24/1: Finalised guidance on financial promotions on social media
3. ASA: Recognising online affiliate marketing, same rules, new guidance
4. UK Parliament petition 754761: Require FCA regulation of proprietary trading firms
5. Stripe: restricted and prohibited businesses
6. Google Ads policy: Financial services (complex speculative financial products)
7. Meta Advertising Standards: Financial and insurance products and services