VAT Cash Accounting Scheme: How It Helps Small Company Cash Flow

The VAT cash accounting scheme lets a small limited company pay VAT to HMRC only when its customers actually pay, rather than when it issues an invoice, which protects cash flow when clients are slow to settle. Any VAT registration limited company UK owners complete brings a choice of accounting method, and for many small companies the cash accounting scheme is the most cash-friendly option. It is available to companies with taxable turnover of £1.35m or less and can make a real difference to your bank balance each quarter. Blue Tick Accountants, a Guildford-based UK tax advisory and accountancy practice, works with small companies to choose and run the right VAT scheme. This guide explains when your company must register, how the cash accounting scheme works, and how it compares with the flat rate and annual accounting schemes.

Key Takeaways

• The VAT registration threshold is £90,000 of taxable turnover in any rolling 12-month period for 2026/27, and registration is compulsory once a company exceeds it.
• The VAT cash accounting scheme lets a company account for VAT when payment is received and reclaim input VAT when suppliers are paid, rather than on the invoice date.
• A limited company can join the cash accounting scheme if its taxable turnover is £1.35m or less, and must leave once turnover exceeds £1.6m.
• The flat rate scheme is open to companies with turnover of £150,000 or less and pays a fixed percentage of gross turnover to HMRC.
• The standard rate of VAT is 20% in 2026/27, so registration typically adds 20% to prices charged to non-VAT-registered customers.
• Voluntary VAT registration below £90,000 is allowed and can benefit companies that mainly sell to other VAT-registered businesses.

When must a limited company register for VAT in 2026/27?

A limited company must register for VAT once its taxable turnover exceeds £90,000 in any rolling 12-month period, or when it expects to exceed that VAT threshold for 2026 within the next 30 days alone. The test looks back over the previous 12 months on a rolling basis, not the accounting year, so a company should monitor turnover every month. HMRC must be notified within 30 days of the end of the month in which the rolling threshold was crossed, and penalties can be charged for late registration.

A company may also register voluntarily below £90,000. This suits businesses that sell mainly to other VAT-registered companies, because those customers reclaim the VAT charged while the seller recovers VAT on its own costs. A company whose customers are members of the public may prefer to delay, since adding 20% to prices can make it less competitive.

How does the VAT cash accounting scheme work?

The VAT cash accounting scheme means a company pays VAT to HMRC only when a customer pays an invoice, and reclaims VAT on purchases only when it pays its suppliers. Under standard VAT accounting, a company owes the VAT on a sales invoice as soon as it is raised, even if the customer has not paid, which can leave it funding HMRC's share out of its own cash. Cash accounting removes that strain by tying the VAT to the actual movement of money.

Consider a design company that raises a £30,000 invoice plus £6,000 VAT in one quarter but is not paid until the next. Under standard accounting it would pay HMRC the £6,000 before receiving a penny from the client. Under the cash accounting scheme, the £6,000 is only due once the client settles, keeping £6,000 in the company's account in the meantime. Among small business VAT schemes, this is the most direct cash flow benefit for firms that invoice on credit terms.

Who can use the cash accounting scheme, and who should not?

A limited company can join the VAT cash accounting scheme if its estimated taxable turnover for the next 12 months is £1.35m or less, and it must leave once turnover exceeds £1.6m. There is no need to apply; a company simply starts using it at the beginning of a VAT period, provided its returns and payments are up to date. The scheme cannot be used for certain arrangements such as hire purchase or where a VAT invoice is raised well in advance of payment.

Cash accounting is not always the best choice. A company that regularly reclaims more VAT than it charges, for example one making heavy purchases or zero-rated sales, may recover VAT faster under standard accounting, because it can reclaim input VAT before paying suppliers. A business that is usually paid immediately, such as a retailer, gains little from the scheme. The right answer depends on how your company is paid and how much VAT it incurs on costs.

Cash accounting changes when VAT is paid rather than how profit is taxed, and our guide to corporation tax payment dates covers the other half of the cash flow picture.

How do the cash, flat rate and annual accounting schemes compare?

The cash accounting, flat rate and annual accounting schemes each solve a different problem, and a small company can combine some of them. The cash accounting scheme, open to turnover up to £1.35m, helps cash flow by linking VAT to payment. The flat rate scheme, open to turnover of £150,000 or less, simplifies VAT by charging customers 20% but paying HMRC a fixed percentage of gross turnover and keeping the difference, which suits businesses with low VATable costs. The annual accounting scheme, also open up to £1.35m turnover, replaces quarterly returns with one annual return and instalments spread across the year.

Cash accounting and annual accounting can be used together, but the flat rate scheme has its own built-in cash treatment. Choosing between these small business VAT schemes depends on your margins, payment terms, and how much administration you want to carry. For a full overview of how VAT works for a small company, see our guide to VAT for limited companies.

Frequently Asked Questions

What is the VAT registration threshold for a limited company in 2026?

The VAT registration threshold is £90,000 of taxable turnover in any rolling 12-month period for 2026/27. A limited company must register within 30 days once it exceeds this figure, or if it expects to exceed it in the next 30 days. The same £90,000 threshold applies to sole traders and partnerships, and it is measured on a rolling basis rather than by the accounting year.

How does the VAT cash accounting scheme help cash flow?

The VAT cash accounting scheme helps cash flow by requiring a company to pay VAT to HMRC only when its customers actually pay, rather than when an invoice is raised. This means the company is not out of pocket funding HMRC's share while waiting to be paid. It particularly benefits businesses that invoice on credit terms and sometimes wait weeks or months for payment.

Can any limited company join the VAT cash accounting scheme?

A limited company can join the VAT cash accounting scheme if its estimated taxable turnover for the next 12 months is £1.35m or less and its VAT returns and payments are up to date. No application is needed; the company simply starts using it at the start of a VAT period. It must leave the scheme once its taxable turnover exceeds £1.6m.

Is the flat rate scheme better than cash accounting for a small company?

Neither scheme is universally better; it depends on the company. The flat rate scheme, for turnover up to £150,000, suits companies with low VATable costs because they keep the difference between the 20% charged and the flat percentage paid. The cash accounting scheme suits companies that invoice on credit terms and want to protect cash flow. Some companies are better off on standard accounting entirely.

How Blue Tick Can Help

Blue Tick Accountants helps small limited companies decide whether and when to register for VAT and which scheme protects their cash flow best. The team reviews your turnover, margins and payment terms, handles registration and quarterly returns, and models the cash flow difference between the cash accounting, flat rate and annual accounting schemes so you choose with confidence. Head to our website and book a meeting now.

Conclusion

The VAT cash accounting scheme is one of the simplest ways for a small limited company to protect its cash flow, because it ties VAT payments to money received rather than invoices raised. If your company invoices on credit terms and its turnover is £1.35m or less, review whether cash accounting would leave more in your account each quarter, and take advice before registering so you start on the scheme that best fits how you trade.

About the Author

This guide was written by Leon, founder of Blue Tick Accountants, a Guildford-based UK tax advisory and accountancy practice that helps landlords, limited company owners and the self-employed across the UK. It was last reviewed for the 2026/27 tax year.

This article is intended for general informational purposes only and does not constitute tax, legal, or financial advice. Tax rules are subject to change and their application will depend on your individual circumstances. You should always seek advice from a qualified professional before taking action. Blue Tick Accountants accepts no liability for decisions made on the basis of this content.

Related reading: Input VAT Recovery: What Your Limited Company Can and Cannot Reclaim.

Related reading: VAT on Entertaining Clients: The Rules That Trip Up Many Directors.