---
title: "Cash Basis vs Traditional Accounting 2026/27: A UK Business Guide"
description: When running an unincorporated business, one of the most fundamental decisions you will make is how to calculate your taxable profits. The two methods available are the Cash Basis and Traditional (Accruals) Accounting. The method you choose affects not only…
url: "https://www.accountingfirms.co.uk/knowledge-bank/cash-basis-vs-traditional-accounting/"
updated: "2026-08-11"
category: Self Employed Tax
---

# Cash Basis vs Traditional Accounting 2026/27: A UK Business Guide

When running an unincorporated business, one of the most fundamental decisions you will make is how to calculate your taxable profits. The two methods available are the Cash Basis and Traditional (Accruals) Accounting. The method you choose affects not only the simplicity of your record-keeping but also the timing of your tax payments.

Following significant changes that made the Cash Basis the default for most self-employed businesses from 2024, understanding Cash Basis vs Traditional Accounting is more important than ever for the 2026/27 tax year.

## What is the Cash Basis?

The Cash Basis is a simplified method of accounting where you record income and expenses only when money actually changes hands. This means:

- **Income** is recorded on the date you receive it.
- **Expenses** are recorded on the date you pay them.

Under this method, you do not need to account for debtors (money owed to you) or creditors (money you owe to suppliers). This simplifies record-keeping, as your books only need to track [cash flow](https://www.accountingfirms.co.uk/blog/what-is-an-overhead/) in and out of the business.

From the 2024/25 tax year, the Cash Basis became the **default** method for calculating trading profits for most self-employed individuals and partnerships, aiming to simplify [tax for small businesses](https://www.accountingfirms.co.uk/blog/company-tax-return/).

## What is Traditional (Accruals) Accounting?

Traditional Accounting, often called the Accruals Basis, is the standard method used by most larger businesses and is aligned with Generally Accepted Accounting Practice (GAAP). Under this method:

- **Income** is recorded on the date you earn it (e.g., the date you issue an invoice).
- **Expenses** are recorded on the date you incur them (e.g., the date a supplier bills you).

This method provides a more accurate picture of a business's financial performance over a period, as it matches income earned with the expenses incurred to generate that income. However, it is more complex, requiring you to track debtors, creditors, and the value of stock.

## Cash Basis vs Traditional Accounting: A Side-by-Side Comparison

| Feature | Cash Basis Accounting | Traditional (Accruals) Accounting |
| --- | --- | --- |
| **Income Recognition** | When payment is received from a customer. | When the invoice is raised, or the work is completed. |
| **Expense Recognition** | When you pay the bill or supplier. | When the expense is incurred (e.g., when you receive a bill). |
| **Debtors & Creditors** | Not accounted for. | Must be tracked on the [balance sheet](https://www.accountingfirms.co.uk/blog/what-are-statutory-accounts/). |
| **Stock** | The cost of stock is generally deducted when paid for. Not held on a balance sheet. | The value of closing stock at the end of the year is accounted for, affecting the cost of sales calculation. |
| **Simplicity** | Simpler to operate and requires less complex bookkeeping. | More complex, often requiring a double-entry bookkeeping system. |
| **Tax Impact** | Tax is paid on the cash profit made. Good for managing [cash flow](https://www.accountingfirms.co.uk/blog/accounting-elevator-pitch/), especially with late-paying customers. | Tax may be payable on income you have not yet received, potentially creating cash flow challenges. |

## The Default Position and Eligibility for 2026/27

For the 2026/27 tax year, the rules established from 6 April 2024 continue to apply:

- The **Cash Basis is the default** method for calculating trading profits for eligible businesses.
- Businesses can **elect** to use the Traditional (Accruals) basis if they prefer.

Previously, businesses had to opt in to the cash basis and were subject to turnover restrictions. These turnover limits have been removed, meaning businesses of any size can now use the cash basis, allowing them to continue using the simpler method as they grow.

However, certain businesses are **excluded** from using the Cash Basis, including:

- Limited companies and [Limited Liability Partnerships](https://www.accountingfirms.co.uk/blog/how-to-dissolve-an-llp/) (LLPs).
- Partnerships that have a corporate partner.
- Businesses that have claimed Business Premises Renovation Allowance.
- Those using profit-averaging rules for farmers or creative artists.

## Changing Your Accounting Method - Cash Basis vs Traditional Accounting

Switching from Traditional Accounting to the Cash Basis, or vice versa, requires careful management. When you change your accounting method, you must make "transitional adjustments" to your profits.

These adjustments are essential to ensure that income and expenses are taxed or relieved once and only once. For example, if you switch from accruals to cash basis, you need to adjust for:

- **Debtors:** Money owed by customers at the end of the last accruals year must be excluded from cash basis receipts when received to prevent it from being taxed twice.
- **Creditors:** Payments made to suppliers in the first cash basis year that were already deducted as an expense in the last accruals year must be added back.
- **Stock:** An adjustment is needed to give [tax relief](https://www.accountingfirms.co.uk/blog/role-of-accounting-in-crowdfunding-campaigns/) for the cost of stock held at the end of the last accruals period.

Similar adjustments are required when moving from the Cash Basis back to Traditional Accounting to capture any income earned but not received, or expenses incurred but not paid.

 

 

*For more detailed guidance, refer to HMRC’s [Business Income Manual](https://www.accountingfirms.co.uk/blog/tax-deductions-for-businesses-is-the-remuneration-excessive/), specifically from BIM72001 onwards for the rules applicable to the 2026/27 tax year. The primary legislation for the simplified cash basis rules is located in the [Income Tax](https://www.accountingfirms.co.uk/blog/making-tax-digital-for-landlords/) (Trading and Other Income) Act 2005.*

## References

1. [Business Income Manual - BIM72005 - Cash basis: overview at 1](https://www.gov.uk/hmrc-internal-manuals/business-income-manual/bim72005#:~:text=cash%20basis%20is%20the%20default,to%20register%20for%20VAT%20require&text=cash%20basis%20is%20the%20default,for%20a%20business&text=method%20of%20accounting,to%20register%20for%20VAT%20require&text=method%20of%20accounting,for%20a%20business)
2. [Business Income Manual - BIM72005 - Cash basis: overview at 1](https://www.gov.uk/hmrc-internal-manuals/business-income-manual/bim72005#:~:text=Business%20Income%20Manual%20BIM72005%20%2D,year%20should%20then%20be%20determined&text=Business%20Income%20Manual%20BIM72005%20%2D,for%20the%20tax&text=Cash%20basis,year%20should%20then%20be%20determined&text=Cash%20basis,for%20the%20tax)
3. [Expanding the Income Tax cash basis for self-employed individuals and partnerships at 3](https://www.gov.uk/government/publications/expanding-the-income-tax-cash-basis-for-self-employed-individuals-and-partnerships/expanding-the-cash-basis#:~:text=changes%20this%20to%20set%20the,pro%20fi%20ts%20from%20the&text=changes%20this%20to%20set%20the,set%20against%20future&text=cash%20basis%20as,pro%20fi%20ts%20from%20the&text=cash%20basis%20as,set%20against%20future)
4. [Expanding the Income Tax cash basis for self-employed individuals and partnerships at 3](https://www.gov.uk/government/publications/expanding-the-income-tax-cash-basis-for-self-employed-individuals-and-partnerships/expanding-the-cash-basis#:~:text=measure%20removes%20restrictions%20on%20the,%20Businesses%20that&text=measure%20removes%20restrictions%20on%20the,the%20cash%20basis&text=use%20of%20the,%20Businesses%20that&text=use%20of%20the,the%20cash%20basis)