Best structure for a trading company: stocks, forex or prop trading as a business

Dit artikel is nog niet in het Nederlands vertaald; de vertaling volgt binnenkort. Hieronder leest u de Engelse versie.

There's no single best structure. First, HMRC (the UK tax office) decides whether your trading counts as a business (a "trade") or as investing. Putting it inside a company doesn't make that question go away. For the financial year beginning 1 April 2026, a UK company pays Corporation Tax at a 19% small profits rate up to £50,000 and a 25% main rate above £250,000, with marginal relief in between ¹. An offshore company only helps if it's really run from outside the UK ².

Am I a trader or an investor in HMRC's eyes, and does a company change that?

HMRC decides this with its "badges of trade". That's a list of nine pointers, looked at together. No badge settles it alone, and each case turns on its own facts ^{3 4}. Setting up a company doesn't remove the question. It just moves it.

Think of the badges as a jury, not a single judge. HMRC says the weight of each badge depends on the circumstances, and it goes on the overall impression ⁴.

What to do: go through the list honestly for your own trading before you choose a structure. The answer shapes everything after it.

How are spread bets, forex and prop-firm accounts taxed?

HMRC's Capital Gains Manual says financial spread betting doesn't involve acquiring or disposing of assets. So no chargeable gains or allowable losses arise from the bet itself ¹. That is a statement about capital gains only. It doesn't say spread betting is tax-free, and it doesn't cover other taxes or whether your activity counts as a trade. The guidance cited here also doesn't cover forex or prop-firm accounts.

The reference is CG56105 in HMRC's Capital Gains Manual. You may see CG12000 quoted elsewhere, but that page covers rights as intangible assets, not spread betting ¹. Even the manuals need a proofreader sometimes.

The guidance above doesn't say how the same bets are treated inside a company. Forex trading and prop-firm payouts aren't covered either. Get those points checked against your own setup before you move any of this into a company.

Waar zitten de grijze gebieden?

Two points here aren't clear-cut: whether your trading counts as a trade at all, and where a company is really controlled from. Both turn on the facts, and HMRC can look at them closely.

Personal, UK Ltd, offshore or fund: how do they compare on £100k profit?

Only the UK company route can be costed here with official figures, and only as an illustration. The worked example below shows the arithmetic for £100,000 of profit for the year from 1 April 2026, using the rates, limits and marginal relief fraction in ¹. The personal, offshore and fund routes need personal tax rates and fund rules that this guide doesn't cover.

The personal route depends on one question: are you trading or investing? That's the badges question again. The offshore route depends on where the company is controlled. This guide covers both.

What does a UK limited company cost me in tax, and how do I get the money out?

For the financial year beginning 1 April 2026, a UK company pays 19% on profits up to £50,000 and 25% above £250,000. Marginal relief, a sliding discount, applies in between, at a standard fraction of 3/200ths ¹. Taking the money out for yourself is a separate cost.

There's a catch. Those £50,000 and £250,000 limits can be reduced for short accounting periods and for associated companies ¹. The limits are set with that in mind, so don't plan on several companies each getting its own low-rate band.

Taking profit out as salary or dividends adds personal tax. The sources behind this guide don't cover the personal rates or any rules aimed at closely controlled companies, so those costs can't be worked out here. Have them calculated on your actual numbers before you set up, not after.

Will an offshore company save me tax if I live and trade from the UK?

Usually not, if you run it from the UK. A company registered abroad can be UK tax-resident if its "centrale leiding en zeggenschapCentrale leiding en zeggenschapWaar de echte strategische beslissingen van een bedrijf worden genomen, meestal daar waar de bestuurders daadwerkelijk overleggen en beslissen." is in the UK ². HMRC looks at the highest-level control, not where the company is registered or where the trading happens ².

HMRC looks at who has authority on paper and whether the directors really use it. It also asks whether someone else is actually directing things. Board meetings held abroad don't decide it if the real decisions are made in the UK ². Having one UK-resident director doesn't settle it either way. What counts is who actually controls the company, and where ².

We're sometimes asked about chains of companies and trusts in different countries, set up by people who want to cut tax while staying in the UK. A practitioner in our network described one such set-up, a Hongkong company owned by a Seychellen trust. It is unverified and we don't endorse it. The warning is this. Putting a trust or a foreign company in the chain doesn't displace the UK central management and control test. HMRC looks at who really exercises control and where, and whether anyone else in practice directs the company ².

What to do: if you place the trades and make the calls from the UK, assume the company is likely to be UK-resident until you've shown otherwise.

What does a fund route involve, and who is it for?

A fund is a pooled vehicle that holds money for one or more investors under its own set of rules. For a trader using only their own capital, the sources behind this guide don't set out how a fund would be taxed or regulated. So this guide can't give you fund figures.

That gap matters. A fund is far heavier kit than a company: more paperwork, more parties, more people asking for documents. Without sourced rules on how it would be taxed, any number here would be a guess. And a guess dressed up in a spreadsheet is still a guess.

The control test from the offshore section still applies to any company inside a fund structure. A company is UK-resident if its central management and control is in the UK, wherever it's registered ².

What to do: treat a fund as a separate project with its own advice. It isn't a quick upgrade from a limited company.

Does where I live decide everything, and what changes if I leave the UK?

Where you live decides a lot. Your personal UK tax position starts with the Statutory Residence Test, which uses automatic tests and a count of days spent in the UK ⁵. A company's position follows where it is really controlled ².

Think of it as two separate questions: one about you, one about your company. Moving abroad can change the answer to the first and leave the second exactly where it was.

On the UK side (what you're leaving). The Statutory Residence Test is set out in HMRC's guidance from RFIG20040 onwards. It covers the automatic tests and how UK days are counted ⁵. HMRC's technical note on non-UK domiciled individuals describes a new residence-based regime that replaces the remittance basisRemittance basisBuitenlands inkomen wordt pas belast zodra u het naar het land overmaakt, niet op het moment dat u het verdient. and domicile ⁶. Your company is a separate case. If you keep running it from the UK, or someone in the UK does, it can stay UK-resident ².

On the destination side (where you're going). The sources here don't cover any destination country's tax. Check your new country's rules on trading income and company residence locally before you rely on the move.

There's a lot of counting involved. Your calendar is about to become a tax document.

What to do: do the residence checks before you book the flight, not after.

What goes wrong most often?

Most of the trouble comes from assuming instead of testing. People assume they're trading or investing, when HMRC decides that on the facts, using the badges of trade ^{3 4}. They assume a foreign company is foreign, when it can be UK tax-resident if it's controlled from the UK ². They assume the profit is theirs once it's in the company.

There are five slips to watch for.

1. Guessing the trade-or-investment question. No single badge of trade, HMRC's list of signs that an activity is a business, normally settles the question. The overall picture of the facts decides it ⁴.
2. Running a foreign company from the UK. A board meeting held abroad isn't decisive if the real decisions are made in the UK ². A trader placing every trade from a UK desk is the obvious case to check.
3. Forgetting the cost of getting money out. The company pays Corporation Tax first. Salary or dividends then add personal tax on top.
4. Losing a helpful treatment by moving. Financial spread betting personally produces no chargeable gains or allowable losses ¹. The sources here don't confirm the same treatment inside a company, so check it before you move the activity.
5. Leaving without checking residence. Your own residence and your company's residence are tested separately ^{5 2}.

Which structure should I pick for my situation?

The right structure depends mainly on where you live and where decisions are really made. Whether your activity counts as trading also matters ^{4 2}. A limited company or an offshore company doesn't replace either test.

Get advice before you commit to any structure. That means before you set up a company, before you add a foreign company or trust, and before you move country.

FAQ

Do I have to pay tax on share trading? Whether it's taxed as trading income or as capital gains depends on the badges of trade and your facts ^{3 4}. The sources behind this guide don't cover which exemptions or allowances might apply, so check them on your own numbers.

How do I avoid 25% Corporation Tax? There's no simple route. For the year from 1 April 2026, 19% applies up to £50,000 and marginal relief applies up to £250,000 ¹. Those limits shrink for associated companies and short accounting periods ¹. Moving the company offshore can fail if it's managed from the UK ².

Is it better to be a Ltd or sole trader? It depends on your profit level, how you take money out and whether the activity is a trade at all. Spread betting treatment matters too ¹. Run a worked comparison rather than relying on a rule of thumb.

Can an offshore company be UK tax-resident? Yes. A company is UK-resident if its central management and control is in the UK, wherever it's registered ².

How much do businesses get taxed in the UK? For the financial year beginning 1 April 2026, Corporation Tax is 19% on profits up to £50,000 and 25% above £250,000. Marginal relief applies in between ¹. Those limits can be reduced for short accounting periods and for associated companies ¹.