Cash basis by default

The vast majority of UK sole traders and small partnerships are now expected to use the cash basis for tax reporting—and yet many remain unaware of this important shift in HMRC’s default position. If you’re submitting a Self Assessment tax return, understanding cash basis accounting could save you both time and money. Let’s explore what this means for your business.

What is the cash basis?

The cash basis is a straightforward way of calculating taxable profit. Rather than following accruals accounting (where you record income when invoiced and expenses when incurred), you only report money that has actually been received or paid out during the tax year. This means no need to track debtors, creditors, or work-in-progress inventory—a genuine relief for many small business owners juggling multiple responsibilities.

HMRC introduced the cash basis as optional in April 2013, but in recent years it has become the default position for sole traders and partnerships with turnover under £300,000. This shift reflects recognition that smaller firms often find cash-based reporting simpler, more intuitive, and easier to manage alongside their day-to-day bank transactions.

Eligibility and automatic application

From 6 April 2023 onwards, the cash basis applies automatically to Self Assessment returns unless you actively choose otherwise. You qualify if your business turnover is below £300,000 and you’re either a sole trader or in partnership (rather than operating through a company, which has separate corporation tax rules).

There are some exceptions. If your business involves dealing in financial instruments, farming, or certain other specialist activities, you may be outside the cash basis regime. Similarly, if you hold significant inventory or stock-in-trade (beyond a small amount for immediate use), accruals accounting may be legally required.

The key point: HMRC will treat you as using the cash basis unless you make an election to use accruals. This is a genuine change in the default position, and it’s worth reviewing whether it works for your circumstances.

When cash basis works well—and when it doesn’t

The cash basis excels for service-based businesses with straightforward income and expense patterns. A consultant, plumber, or freelance designer with minimal stock, few employees, and no complex inventory arrangements typically benefits from its simplicity.

However, cash basis has limitations. It can distort profit calculations for businesses with significant timing differences between cash flow and actual expenditure. For instance, if you purchase £50,000 of equipment in March but pay over twelve months, you can only claim the cash relief in each tax year as you actually pay. This can push taxable profit artificially high in some years and low in others.

Additionally, if you’re seeking a business loan or need to present financial statements to partners or investors, accruals accounts often present a clearer picture of underlying profitability. Many lenders prefer to see accruals-based accounts, even for small firms.

The VAT angle also matters: VAT-registered traders using cash basis must still account for VAT on the accruals basis, which creates a dual-accounting burden. If you’re VAT-registered, weigh this carefully.

Making an informed choice

The fact that cash basis is now automatic doesn’t mean it’s compulsory. You can elect to use accruals accounting instead by making a formal election on your tax return, provided HMRC hasn’t prohibited it for your particular trade. Some business owners find this preferable from the start, especially if they operate internationally or hold significant stock.

What matters most is understanding how your choice affects your tax bill, cash flow reporting, and any obligations to third parties. A £5,000 difference in timing between invoice date and payment date might feel trivial, but multiplied across hundreds of invoices over several years, it can create material differences in reported profit and tax liability.

Moving forward

If you’ve never reviewed your accounting basis, now is the time. Check your most recent tax return: does it clearly state which basis you’re using? If you’re unsure or suspect you’ve been using the wrong method, it’s worth taking action sooner rather than later. HMRC can be sympathetic to inadvertent errors caught early, but delays increase the risk of enquiries or penalties.

The cash basis offers genuine benefits for the right business. But ‘default’ doesn’t mean ‘best for everyone’. A few minutes spent reviewing your position now could prevent headaches—and unnecessary tax—later on.

For tailored advice, contact Severn Accounting — we’re here to help.