Do I need a business bank account as a sole trader?

The short answer

No. If you are a sole trader in the UK, there is no legal requirement to open a business bank account. As a sole trader you and the business are the same legal person: the profits are your income, the debts are your debts, and the money in your account is yours whichever account it sits in.

HMRC’s own guidance is explicit about this. Its page on business records for the self-employed says: “You might be able to use a personal or business bank account for your business. Check with your bank which type of account you can use for business transactions.” That last sentence is the catch, and it is covered below.

So the honest answer has three parts. The law does not require it. HMRC does not require it, but it does require records that a mixed account makes harder to keep. And your bank may not allow it, depending on what its personal account terms say.

Limited companies are different

If you trade through a limited company, the position changes. GOV.UK describes a limited company as “legally separate from the people who own it”. The company earns the income, owns the money and owes the Corporation Tax. A director who lets customers pay the company’s invoices into a personal account is handling money that belongs to someone else, even when that someone else is a company they own outright.

There is no single statute that says “a company must have a bank account”, but in practice it is unavoidable. The company needs to pay its own bills, run payroll, pay HMRC and show its accountant a clean record of its own transactions. Company money moving through a director’s personal account also creates entries on the director’s loan account, which can lead to extra tax. The guide to using a personal account for business explains how that works.

What HMRC actually requires

HMRC’s rules are about records, not accounts. According to GOV.UK, a self-employed person must keep records so they can work out their profit or loss for the tax return and show the records to HMRC if asked. The records must be accurate, and you must be able to identify business transactions.

HMRC lists the kinds of proof you should keep: receipts for goods and stock, bank statements, chequebook stubs, sales invoices, till rolls and bank slips. You must keep your records for at least 5 years after the 31 January submission deadline for the relevant tax year. For the 2025 to 2026 tax year, filed online by 31 January 2027, that means keeping records until at least the end of January 2032.

A personal account full of groceries, rent, holidays and the odd client payment can meet that standard, but only if you annotate it carefully. Every business payment has to be identified and every personal one excluded. If HMRC asks questions, you will be explaining your personal spending as well as your business spending.

Making Tax Digital raises the bar

From 6 April 2026, sole traders and landlords whose qualifying income was over £50,000 in the 2024 to 2025 tax year must use Making Tax Digital for Income Tax. The threshold falls to £30,000 from 6 April 2027 and £20,000 from 6 April 2028, according to GOV.UK. Under MTD you keep digital records and send quarterly updates through compatible software. Software that reads a clean business account feed does most of that work for you. A mixed personal account means sorting every transaction by hand each quarter. The Making Tax Digital for Income Tax guide covers the dates and what counts as qualifying income.

What your bank’s terms say

This is the part most sole traders skip. Personal current accounts are generally designed and priced for personal use, and many banks’ terms say so. Some restrict or prohibit using a personal account mainly for business. Others allow occasional business income but not a trading account running through it.

The wording differs between banks and changes over time, so check the terms of your own personal account rather than relying on a general rule. Search the terms for “business”, “commercial” or “personal use”. If they restrict business use and your account shows regular customer payments, the bank could ask you to open a business account or, in some cases, close the personal one.

HMRC’s instruction to “check with your bank” is the practical test. If your bank says business use is fine for your level of activity, a personal account may do. If it says no, or the terms are unclear, a separate business account removes the question.

The £1,000 trading allowance

For very small side income, the question may not arise at all. GOV.UK says you can get up to £1,000 each tax year in tax-free trading allowance. If your gross trading income is £1,000 or less from one or more trades, you may not need to tell HMRC, although there are circumstances in which you must still register for Self Assessment, and you must keep records of the income.

Above £1,000, you must register for Self Assessment as a sole trader, according to GOV.UK’s sole trader guidance. You can then choose to deduct the £1,000 allowance instead of your actual expenses, which is worth doing if your costs are low.

Note that “gross” means turnover before costs. Someone selling £1,500 of crafts with £800 of materials has gross trading income of £1,500, so they are over the allowance even though the profit is £700. Online sellers often get caught by this, which is why the guide for Etsy sellers spends time on it.

Why most sole traders open one anyway

The case for a separate account is practical rather than legal. For a sole trader with regular income, the benefits tend to outweigh the small effort of opening one.

The tax benefit is the one people underestimate. A sole trader pays Income Tax and National Insurance on profit, usually in two payments on account plus a balancing payment. Keeping that money in the same pot as your living costs is how people end up short in January. Many business accounts let you move a percentage of each payment into a separate pot automatically. Our tax set-aside calculator suggests a percentage.

What to look for in a sole trader account

• The monthly fee against what you use: a free plan with per-transaction charges can cost more than a paid plan if you make many transfers or cash deposits.
• Cash handling: if customers pay in cash, check where you can deposit it, the fee per deposit and any monthly limit.
• Accounting software: check the account feeds into the software you or your accountant use, and whether it offers MTD-compatible tools.
• Getting paid: invoicing, payment links and card acceptance save you paying for separate tools.
• Protection: a bank account is covered by the FSCS; some business accounts are e-money accounts, which are safeguarded instead. The FSCS guide explains the difference.

When it is worth it

If you are just starting out, the documents guide lists what you will need to apply. Sole traders generally need photo ID, proof of address and some business details, but no Companies House registration.

A free option

Cost is the usual objection, and it no longer holds. Several UK business accounts have a no-fee plan. Our free business accounts page lists them with the transaction charges that still apply.

Monzo Business is one of them. Monzo accepts sole traders and private limited companies (limited by shares), and its Lite plan is free. It includes:

The MTD software is aimed at sole traders and landlords, which is the group the new rules affect. Tax Pots, which set aside a percentage of each payment automatically, need Pro or Team. The plan comparison sets out which features sit on which plan, and the sole trader account comparison covers the alternatives, including where other providers suit a sole trader better.

If you open Monzo Business through our link, you and we each get £50. That is only for people who have never opened a Monzo account before, of any kind, and who download the app, apply, add money and make a first card payment within 30 days. The referral page explains the four steps.