VAT Schemes Compared: Flat Rate, Cash and Standard
Once you are VAT-registered in the UK, you do not have to account for VAT in just one way. HMRC offers several schemes that can simplify paperwork, help cash flow or both. Picking the right one can save time and sometimes money, while the wrong one can quietly cost you. This comparison explains how each scheme works and who it suits. It is general information, not tax advice, so check GOV.UK or an accountant before switching.
Key takeaways
- Standard VAT accounting uses invoice dates and reclaims input VAT on purchases. It is the default.
- The Flat Rate Scheme simplifies returns by paying a fixed percentage of turnover, but limited cost traders pay 16.5%.
- The Cash Accounting Scheme lets you pay VAT only when customers pay you, which helps if clients pay late.
- The Annual Accounting Scheme means one return a year with advance payments during the year.
Most small businesses register for VAT and never think about schemes again. That is a missed opportunity. Depending on your margins, your costs and how quickly your customers pay, a different scheme could smooth your cash flow or cut your admin. In some cases, combining schemes works best.
This guide compares the standard method with the three main simplification schemes for small businesses: Flat Rate, Cash Accounting and Annual Accounting. Each has eligibility rules, and you should run your own figures before you decide.
Standard VAT accounting: the default
Under standard accounting, you account for VAT based on invoice dates. You charge output VAT on your sales at the correct rate, reclaim input VAT on eligible purchases, and pay the difference on each return, usually quarterly.
The key detail is timing. You owe VAT on a sale when you issue the invoice, not when the customer pays. If a client takes 60 days to settle, you may pay HMRC before you have received the money. On the other hand, you can reclaim input VAT on purchases as soon as you have the invoice, even before you pay the supplier.
Standard accounting suits businesses that have significant VAT-bearing costs, customers who pay promptly, or sales that change between rates. It is also the most accurate reflection of what you actually charged and paid.
Flat Rate Scheme
Under the Flat Rate Scheme, you still charge your customers VAT at the normal rate, but you pay HMRC a fixed percentage of your VAT-inclusive turnover. The percentage depends on your business sector. In return, you generally cannot reclaim input VAT on purchases, except on certain capital assets above a set value.
You can join if your taxable turnover, excluding VAT, is £150,000 or less. The main appeal is simplicity: you do not need to track input VAT on every purchase, so returns are quicker.
The limited cost trader rule
If you spend very little on goods, you may be classed as a limited cost trader. In that case you must use a flat rate of 16.5%, regardless of your sector. HMRC's test looks at how much you spend on relevant goods compared with your turnover. Services, such as software, phone bills or professional fees, generally do not count as goods for this test. Many service businesses, like consultants and designers, fall into this category, and at 16.5% the scheme often stops being worthwhile.
Common mistake
Joining the Flat Rate Scheme for simplicity and never checking the limited cost trader test. If you spend little on goods, you may be paying 16.5% of gross turnover while reclaiming almost nothing. Check the test for each return period, since your spending can change.
Example
Imagine two VAT-registered sole traders. One is a web consultant whose main costs are software subscriptions and a laptop. She tests her spending and finds she is a limited cost trader, so her flat rate would be 16.5%. After running her figures, the scheme saves her almost nothing and she stays on standard accounting. The other runs a small bakery with regular purchases of flour, packaging and equipment. He is not a limited cost trader, so he compares his sector rate with standard accounting before deciding. He uses his actual figures from the last four quarters rather than guessing.
Cash Accounting Scheme
Under the Cash Accounting Scheme, you account for VAT when money actually moves. You pay output VAT when your customer pays you, and you reclaim input VAT when you pay your supplier. You can join if your taxable turnover is up to £1.35 million.
The main benefit is cash flow. If customers pay you late, or if a customer never pays, you do not pay VAT on money you have not received. That also gives you automatic protection against bad debts. The trade-off is that you cannot reclaim input VAT until you have paid your suppliers, so if you buy on credit and customers pay quickly, standard accounting might suit you better.
Cash Accounting cannot be used together with the Flat Rate Scheme, since the Flat Rate Scheme has its own cash-based option. It can generally be combined with Annual Accounting. There are also some exclusions, such as certain goods bought on lease purchase or hire purchase, so read HMRC's guidance.
Pro tip
Look at your average customer payment time. If clients typically pay in 30 days or more and your supplier bills are small, Cash Accounting often improves cash flow noticeably. If clients pay at the point of sale, the benefit is small.
Annual Accounting Scheme
Under the Annual Accounting Scheme, you submit one VAT return a year instead of four. During the year you make advance payments, usually monthly or quarterly, based on your previous VAT liability or an estimate. After the year ends, you submit the annual return and pay any balance or receive a refund. You can join if your taxable turnover is up to £1.35 million.
The benefits are less frequent returns and predictable payments, which can make budgeting easier. The downsides: if your turnover falls, your advance payments may be too high for a while, and you only see repayments once a year, which matters if you regularly reclaim more than you pay.
Who Annual Accounting suits
Annual Accounting tends to suit businesses with steady turnover and a stable VAT bill, where the main goal is less paperwork. It suits seasonal businesses less well if their advance payments do not match the uneven way cash comes in, and it rarely suits businesses that regularly receive VAT repayments, because waiting a full year for a refund ties up money. If you use it, keep your bookkeeping up to date during the year anyway, since a single annual return is much harder to prepare from a pile of unsorted records.
Side-by-side comparison
| Scheme | Who can join | How VAT is calculated | Best suited to |
|---|---|---|---|
| Standard | All VAT-registered businesses | Output VAT minus input VAT, by invoice date | Businesses with significant VAT-bearing costs |
| Flat Rate | Taxable turnover £150,000 or less, excluding VAT | Fixed sector percentage of gross turnover; 16.5% for limited cost traders | Businesses with low input VAT that are not limited cost traders |
| Cash Accounting | Taxable turnover up to £1.35 million | Output minus input VAT, when money is received or paid | Businesses whose customers pay late |
| Annual Accounting | Taxable turnover up to £1.35 million | One annual return with advance payments | Businesses wanting fewer returns and steady payments |
How to choose the right scheme
- Check eligibility. Compare your taxable turnover with each scheme's limit.
- Test for limited cost trader status if you are considering the Flat Rate Scheme.
- Pull 12 months of records. Use actual sales, purchases and VAT figures.
- Model each option. Calculate the VAT you would have paid under each scheme you qualify for.
- Consider cash flow, not just totals. Look at when payments would fall due, and how quickly your customers pay.
- Check software support. Make sure your MTD-compatible software handles the scheme.
- Review once a year. As your business changes, the best scheme can change too.
Questions to ask before you switch
Your figures will do most of the deciding, but a few practical questions help too:
- How much time do VAT returns take you now? If they are quick already, a simplification scheme may add little.
- How quickly do your customers pay? Slow payers point toward Cash Accounting.
- Are you planning a large purchase? Big equipment purchases usually mean a large input VAT reclaim, which standard accounting handles well.
- Is your turnover growing fast? If you may soon pass a scheme's leaving threshold, the switching effort may not be worth it.
- What does your accountant think? They can see your full picture and spot conditions that are easy to miss.
Your VAT scheme checklist
- Confirm your current VAT taxable turnover
- List which schemes you are eligible for
- Run the limited cost trader test before considering Flat Rate
- Model a year of VAT under each eligible scheme
- Compare cash flow timing, not just the annual total
- Check that your software supports the scheme you choose
- Read HMRC's joining and leaving conditions for that scheme
- Set a yearly reminder to review your choice
Frequently asked questions
Can I use more than one VAT scheme?
Some combinations are allowed. Cash Accounting and Annual Accounting can generally be used together, and Annual Accounting can work alongside the Flat Rate Scheme. Cash Accounting cannot be combined with the Flat Rate Scheme. Check HMRC's guidance for each combination.
Do I still charge customers 20% under the Flat Rate Scheme?
Yes. Your customers see the normal VAT rate on their invoices. The flat rate only changes how you calculate what you pay HMRC.
Can I leave a scheme if it stops suiting me?
Yes, you can usually leave a scheme voluntarily, and you must leave if your turnover goes over the relevant leaving threshold. There are rules about timing and, in some cases, how soon you can rejoin, so read the guidance before you switch.
Does Making Tax Digital affect which scheme I can use?
MTD for VAT applies to all VAT-registered businesses whichever scheme they use. You still need digital records and compatible software, so confirm your software supports your chosen scheme.
Related reading
The bottom line
Standard accounting is the default, but the Flat Rate, Cash Accounting and Annual Accounting schemes can each make VAT easier for the right business. Flat Rate suits low-cost businesses that are not limited cost traders, Cash Accounting helps when customers pay late, and Annual Accounting cuts the number of returns. Use your own figures to compare them.
Thresholds, rates and conditions change, so treat this as general information. Check the latest rules on GOV.UK or speak to a qualified accountant before you join or leave a scheme.
