Cash Basis vs Traditional Accounting for Sole Traders — Which Should Your Trade Use? (2026)

What Is the Cash Basis?

The cash basis is exactly what it sounds like. You record income when the money actually lands in your account, and you record expenses when you actually pay them. If you invoice a customer £4,000 in March but they don't pay until May, that £4,000 counts as income in May — the tax year the cash arrived, not the tax year you raised the invoice.

The same logic applies to your costs. You claim an expense when the money leaves your account, not when you receive the supplier's invoice. There are no debtors (money owed to you), no creditors (money you owe), and no stock valuations to work out at the year end. Your taxable profit is, broadly, the cash that came in minus the allowable cash that went out.

What Is Traditional (Accruals) Accounting?

Traditional accounting — also called the accruals basis — records income when you earn it and costs when you incur them, regardless of when the money actually moves. That £4,000 invoice raised in March counts as income in March, even if you haven't been paid. The amount your customer owes sits on your books as a debtor; amounts you owe suppliers sit there as creditors.

Accruals accounting also accounts for stock and work in progress. If you've bought materials you haven't used yet, the unused portion is carried forward rather than fully expensed. It gives a more complete picture of the financial position of a business at a point in time, which is why it's the standard method for larger and more complex operations. The trade-off is that it's more involved to maintain, and you can end up paying tax on profit you haven't yet been paid for.

The Big 2024 Change — Cash Basis Is Now the Default

This is the part most trades haven't caught up with. From the 2024/25 tax year onwards, the cash basis became the default method of working out trading profits for most sole traders and partnerships. Previously you had to actively opt in to the cash basis and you could only use it if your turnover was under a set threshold. That's been flipped on its head.

Now, if you want to use traditional accruals accounting, you have to actively elect out of the cash basis. If you do nothing, you're on the cash basis automatically. Alongside that switch, the government removed the old restrictions that used to limit it:

• The turnover entry threshold (you previously had to be under it to join) has been removed — there's no longer a turnover cap on using the cash basis.
• The turnover exit threshold (which forced you off the cash basis once you grew past a higher figure) has been removed too.
• The old £500 cap on interest and finance costs that applied under the cash basis has been removed, so finance costs are treated more sensibly.
• The previous restrictions on using trading losses under the cash basis were also relaxed as part of the same reform.

In plain terms: the cash basis is now the starting point for the vast majority of unincorporated trades, regardless of size, and you only move to accruals if you choose to and tell HMRC by making the election on your tax return.

Who Can Use the Cash Basis?

The cash basis is for sole traders and partnerships made up of individuals. It is not available to limited companies, which must always use traditional accruals accounting and prepare statutory accounts. It also can't be used by limited liability partnerships (LLPs), and a handful of specific business types (such as certain farming businesses using herd basis, Lloyd's underwriters and a few others) are excluded by the rules.

So if you trade as "Joe Bloggs, plumber" or as an ordinary partnership of two individuals, the cash basis applies to you by default. If you've incorporated and run through a limited company, this article is useful background but the choice doesn't apply — your company accounts are on the accruals basis regardless.

Why the Cash Basis Suits a Lot of Trades

For a typical sole trader doing domestic and small commercial work, the cash basis lines up neatly with how the business actually runs. The main benefits:

• You're taxed on money you've actually received. If a customer is slow to pay, you don't pay tax on that invoice until the cash turns up. Under accruals you could owe tax on a £6,000 job in January that the customer doesn't settle until the following tax year.
• It's simpler to keep. No year-end debtor and creditor adjustments, no stock valuation, no work-in-progress calculation. Your bookkeeping is much closer to "what's in and out of the bank account."
• Cash flow and tax bill move together. Your taxable profit tracks your actual cash position more closely, which makes it easier to set money aside for tax as you go.
• Bad debts are less of a headache. If a customer never pays, you never recorded the income in the first place, so there's nothing to write off.

The Limitations You Need to Know About

The cash basis isn't free of trade-offs, and there are situations where accruals is genuinely better. Watch out for these:

• How losses are treated. Historically the cash basis came with restrictions on "sideways" loss relief — meaning you generally couldn't offset a trading loss against your other income (such as employment earnings) or carry it back to an earlier year, only carry it forward against future profits of the same trade. The 2024 reform relaxed some of the old cash-basis loss restrictions, but loss relief is one of the most important things to check before you rely on it, because if you expect a loss and want to use it flexibly, accruals can still be the better route.
• Equipment and capital allowances. Under the cash basis you generally just deduct the cost of most plant and equipment (vans, tools, machinery) as a normal expense when you pay for it, rather than claiming capital allowances. That's simpler, but cars are an exception and still go through capital allowances, and the timing of relief differs from accruals — worth thinking about if you're making a large equipment purchase.
• No relief for stock you're holding. Because there are no stock or work-in-progress adjustments, the timing of relief on materials can be less precise for a business carrying a lot of stock.
• Larger or growing businesses. If you're bigger, more complex, carry significant stock, or want the fullest flexibility on losses and finance costs, traditional accounting gives a more complete and flexible picture — and some lenders prefer accruals accounts.

Cash Basis vs Traditional Accounting — Side by Side

How It Fits With Making Tax Digital for Income Tax

Making Tax Digital for Income Tax (MTD for ITSA) is being phased in for self-employed people and landlords, starting with those over the higher income thresholds and rolling down over time. It requires you to keep digital records and send quarterly updates to HMRC using compatible software.

The cash basis pairs naturally with MTD. Because cash-basis records are essentially money in and money out, they map cleanly onto a digital bookkeeping system that's already tracking your bank transactions. There are no complex year-end accruals adjustments to bolt on each quarter, which keeps the quarterly updates straightforward. If you're going to be inside MTD for Income Tax, getting your records into clean digital software now — on the cash basis — removes a lot of friction later.

Practical Tips for Trades

• For most trades, the cash basis is a sensible default. If you do straightforward job work, get paid by your customers in cash or bank transfer, and don't carry much stock, the cash basis is likely to be both simpler and kinder on your cash flow.
• Think hard before relying on it if you expect a loss. If you're in a start-up year, investing heavily, or have employment income you'd like to set a trading loss against, talk to an accountant about whether electing out to accruals gives you better loss relief.
• Plan large equipment purchases. The timing and method of relief differs between the two bases, so a big van or machinery purchase is a good prompt to check which gives you the better result.
• Keep clean digital records either way. Whichever basis you use, good bookkeeping software that tracks income against payment dates makes the whole thing easier — and is becoming a requirement under MTD.
• You can switch. The basis isn't permanent. Your circumstances can change as the business grows, so review the choice each year rather than setting it once and forgetting it.

This article is general guidance to help you understand your options, not personal tax advice. Your own position — especially around losses, growth plans and capital purchases — should be checked with a qualified accountant before you decide which basis to use or whether to elect out.