Understanding the Cash Basis Accounting Method for Small Businesses
The cash basis is a simplified method of accounting available to eligible sole traders, landlords, and partnerships. Under the cash basis, you record income when you actually receive it and expenses when you actually pay them — not when invoices are raised. This simplifies bookkeeping considerably, particularly for businesses with straightforward cash flows.
Who Can Use the Cash Basis?
Self-employed individuals can use the cash basis if their annual turnover is below £150,000. If your turnover exceeds £300,000, you must leave the cash basis. Landlords may use the cash basis for rental income (it became available to them from April 2017). Partnerships of individuals can also use the cash basis, though partnerships with a corporate partner cannot.
Key Differences from Traditional Accruals Accounting
Under accruals accounting (the traditional method), you record income when invoiced and expenses when incurred, regardless of when payment changes hands. This means you may owe tax on income you have not yet received. Under the cash basis, there is no such mismatch — you only count money that has actually entered or left your bank account. For businesses where customers pay promptly and bills are settled regularly, the two methods produce similar results. For businesses with long payment terms or significant debtors, the cash basis can provide a meaningful cash flow advantage.
Restrictions Under the Cash Basis
Several restrictions apply: you cannot claim capital allowances for most assets (instead, deduct the cost when you pay for it — essentially immediate full expensing for all assets), but you cannot claim AIA separately; interest deductions are limited to £500 per year; loss relief is restricted (losses can only be carried forward to offset future business profits, not used against other income or carried back); bank loans and overdraft interest restrictions apply. You also cannot use the cash basis if you are using certain VAT accounting schemes that require accruals accounting.
Advantages
Simpler bookkeeping — you just track bank transactions. No need to create debtors or creditors lists. No mismatch between tax due and cash in hand. For businesses with very simple finances (few outstanding invoices or bills), the cash basis removes unnecessary complexity from the tax return. HMRC's MTD for Income Tax systems are designed to work with cash basis records.
Switching To or From the Cash Basis
You can choose to use the cash basis from any tax year. When switching from accruals to cash basis, transitional rules prevent double counting of income and expenses. When switching back (or when you must leave because turnover exceeds £300,000), reverse transitional adjustments apply. Get your accountant to review the transition adjustments carefully to ensure you do not miss income or deduct expenses twice.
Should You Use Cash Basis or Accruals?
For simple businesses with turnover well below £150,000 and few outstanding debtors or creditors, the cash basis is attractive for its simplicity. For more complex businesses — those with significant stock, long customer payment terms, or substantial assets — accruals accounting provides a more accurate picture of the business's financial health and may be preferable despite being more complex.
