Flat Rate VAT and the Limited Cost Trader Trap Explained
How the VAT Flat Rate Scheme works in 2026/27, why the limited cost trader 16.5% rate wipes out the saving, and how to decide if it still pays.
Quick answer
The Flat Rate Scheme lets a small business pay VAT as one fixed percentage of gross turnover rather than calculating output VAT minus input VAT on every invoice. The catch is the "limited cost trader" rule: if you spend very little on goods, you must use a flat 16.5% rate, which removes nearly all the benefit and often makes standard VAT accounting cheaper. Model both before you commit.
How the Flat Rate Scheme works
VAT in the UK is charged at the standard rate of 20%. Under normal VAT accounting you add 20% to your sales, you record the 20% VAT on your business purchases, and you pay HMRC the difference each quarter. That involves keeping evidence for every transaction.
The Flat Rate Scheme simplifies this. You still charge your customers 20% VAT in the usual way. But instead of the input-minus-output calculation, you pay HMRC a single flat percentage of your gross turnover. Gross turnover here means your total takings including the VAT you charged.
The flat percentage depends on your trade sector. HMRC publishes a table of sector rates, and they vary widely. The idea is that each rate already bakes in an average amount of input VAT for that type of business, so you no longer reclaim VAT on day-to-day costs. The exception is a single capital asset purchase of GBP 2,000 or more including VAT, where normal reclaim rules apply.
To join the scheme your expected VAT-taxable turnover, excluding VAT, must be GBP 150,000 or less in the coming 12 months. You must already be VAT registered, which is compulsory once your taxable turnover passes GBP 90,000 in any rolling 12-month period. You can register voluntarily below that.
Why the scheme used to be attractive
Before the limited cost trader rules arrived, the scheme could leave a useful surplus in your pocket. Suppose your sector rate was, say, in the low teens as a percentage. You charged 20% VAT but only handed over a low-teens percentage of your gross sales. The gap was yours to keep, on top of saving administrative time.
That surplus is not a loophole; HMRC treats it as taxable business income. So it feeds into your income tax and, for the self-employed, Class 4 National Insurance at 6% on profits between GBP 12,570 and GBP 50,270, then 2% above. Even after tax, many low-cost service businesses came out ahead, which is precisely why the rules were tightened.
The limited cost trader test
From April 2017 HMRC introduced the limited cost trader category to stop labour-only businesses extracting a windfall. You are a limited cost trader, in any single VAT period, if your spending on "relevant goods" is either:
- less than 2% of your gross (VAT-inclusive) turnover, or
- less than GBP 250 in the quarter, where 2% would come to less than that.
Relevant goods means physical items used in your business. Crucially, the following do NOT count:
- services of any kind, including subcontractors, software and accountancy
- capital expenditure such as equipment and machinery
- food and drink for you or staff
- fuel and vehicle costs, except where you run a transport business using your own vehicle
Because so many costs are excluded, most consultants, IT contractors, designers, trainers and other labour-led businesses fall straight into limited cost trader status. They simply do not buy enough physical goods to clear the 2% bar.
You apply the test every VAT period, so your status can change. A business that buys a stock of goods one quarter might not be a limited cost trader that period, then revert the next.
The 16.5% rate and why it stings
A limited cost trader must use a flat rate of 16.5% of gross turnover. That sounds comfortably below 20%, but remember the percentage applies to the VAT-inclusive figure.
Work it through. If you make GBP 1,000 of net sales, you charge GBP 200 VAT, so gross turnover is GBP 1,200. The flat rate liability is 16.5% of GBP 1,200, which is GBP 198. You collected GBP 200 of VAT and pay GBP 198 to HMRC. You keep GBP 2, and you have given up the right to reclaim input VAT on your costs.
| Item | Standard accounting | Flat rate at 16.5% |
|---|---|---|
| Net sale | GBP 1,000 | GBP 1,000 |
| VAT charged to customer | GBP 200 | GBP 200 |
| Gross turnover | GBP 1,200 | GBP 1,200 |
| VAT paid to HMRC | GBP 200 minus input VAT | GBP 198 |
| Input VAT reclaimed | Yes, on eligible costs | No (except capital over GBP 2,000) |
Under standard accounting, every pound of input VAT on your software, phone, professional fees and equipment reduces what you owe. Under the 16.5% flat rate you lose all of that and keep a sliver. For almost every limited cost trader, standard VAT accounting wins.
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Take a contractor with GBP 80,000 of net annual sales and GBP 4,000 of input VAT on allowable costs across the year.
Standard accounting: output VAT is GBP 16,000, less GBP 4,000 input VAT reclaimed, so GBP 12,000 goes to HMRC.
Flat rate at 16.5%: gross turnover is GBP 96,000, and 16.5% of that is GBP 15,840 paid to HMRC, with no input VAT reclaim.
The flat rate trader pays GBP 15,840 against GBP 12,000 under standard accounting, a difference of GBP 3,840 a year. The simpler scheme costs nearly four thousand pounds. The only consolation is the extra VAT is a deductible business expense, so it shaves income tax and Class 4 National Insurance, but that recovers only a fraction of the loss.
The first-year discount
There is one bright spot. Newly VAT-registered businesses get a 1 percentage point reduction on their flat rate for the first 12 months after registration. For a limited cost trader that means 15.5% rather than 16.5% in year one. It is a genuine saving, but it is temporary and modest. Do not let a 12-month discount lock you into a scheme that costs more for years afterwards.
When the scheme still makes sense
The Flat Rate Scheme is not dead. It can still pay if both of these are true:
- your trade sector rate is meaningfully below 16.5%, and
- you genuinely buy enough relevant goods to stay out of limited cost trader status.
Retailers, makers and businesses that buy physical stock are the obvious candidates. So is anyone who values the reduced record-keeping and has few reclaimable costs anyway. The scheme also caps simplicity nicely for very small operations near the registration threshold.
But you must leave the scheme if your total business income, including VAT, reaches GBP 230,000, or if you expect it to in the next 30 days. After leaving you cannot rejoin for 12 months.
How to decide
There is no shortcut: you have to run the numbers both ways using your real figures.
- Estimate your annual net sales and the VAT you will charge.
- Add up the input VAT you could reclaim under standard accounting.
- Find your sector flat rate, and check the limited cost trader test each quarter.
- Compare total VAT paid under each method, then factor in the income tax and National Insurance effect of any surplus or extra cost.
Because the surplus or shortfall flows through to your profit, use a
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- Forgetting the 2% test is checked every period, not once at the start.
- Treating subcontractor and software costs as "goods" - they are services and do not count.
- Overlooking that the surplus is taxable income, which can erode the apparent benefit.
- Staying on the scheme out of habit after the first-year discount ends.
- Missing the GBP 230,000 exit threshold and the 12-month rejoin restriction.
The bottom line
The Flat Rate Scheme was designed for simplicity, and for some goods-buying businesses it still delivers. But the limited cost trader rules and the 16.5% rate have stripped the advantage from the very service businesses that once gained most. If you spend little on physical goods, the scheme usually costs you more than standard VAT accounting once you account for the input VAT you can no longer reclaim. Model both methods with your own numbers, check the limited cost trader test each quarter, and choose the route that leaves the most in your business.
Frequently asked questions
What is the VAT Flat Rate Scheme?
The Flat Rate Scheme lets a small business pay VAT as a single fixed percentage of its gross (VAT-inclusive) turnover, instead of working out output VAT minus input VAT on every transaction. You still charge customers 20% VAT, but you keep the difference between what you charge and your flat rate. In exchange you generally cannot reclaim VAT on purchases, apart from certain capital assets over GBP 2,000 including VAT.
Who counts as a limited cost trader?
You are a limited cost trader in any VAT period if your spending on relevant goods is less than 2% of your gross turnover, or less than GBP 250 a quarter where 2% would be lower. Relevant goods exclude services, capital items, food, fuel and vehicle costs. Most consultants, contractors and labour-only businesses fall into this category because they buy mostly services and time, not physical goods.
What rate does a limited cost trader pay?
A limited cost trader pays a flat rate of 16.5% of gross turnover. Because gross turnover already includes the 20% VAT you charged, 16.5% of the gross figure works out at roughly 19.8% of your net sales. That leaves almost no margin between the VAT you collect and the VAT you hand over, which is why the scheme rarely benefits limited cost traders.
Can I still join the Flat Rate Scheme as a limited cost trader?
Yes, you can still join, but you must apply the 16.5% limited cost trader rate in any period where the test is met, rather than your trade sector rate. You check the test every VAT period, so a business can move in and out of limited cost trader status. For most service businesses there is little or no saving, so standard VAT accounting is often the better choice.
What is the first-year discount on the Flat Rate Scheme?
Newly VAT-registered businesses get a 1 percentage point reduction on their flat rate for the first 12 months from the date of registration. This applies to the sector rate and to the limited cost trader rate, so a limited cost trader would pay 15.5% for the first year. The discount is a one-off and ends exactly 12 months after registration.
Do I have to register for VAT to use the scheme?
Yes. You must be VAT registered to use any VAT scheme. The compulsory VAT registration threshold is GBP 90,000 of taxable turnover in any rolling 12-month period. You can also register voluntarily below that figure. To join the Flat Rate Scheme your expected VAT-taxable turnover, excluding VAT, must be GBP 150,000 or less in the next 12 months.
Can I reclaim VAT on purchases under the Flat Rate Scheme?
Generally no. The flat rate already factors in an average level of input VAT, so you cannot separately reclaim VAT on day-to-day purchases. The main exception is capital assets costing GBP 2,000 or more including VAT, bought as a single purchase, where you can reclaim the VAT in the normal way. Standard VAT accounting may suit you better if you have large or frequent purchases.
Is the Flat Rate Scheme worth it in 2026/27?
It depends on your trade sector rate and how much you spend on goods. Businesses with a low sector rate and few goods purchases can still gain, especially in the discounted first year. But if you are a limited cost trader paying 16.5%, the scheme usually costs you more than standard accounting once you factor in input VAT you can no longer reclaim. Model both methods before deciding.
How do I leave the Flat Rate Scheme?
You can leave voluntarily at any time by writing to HMRC, and you must leave if your total business income reaches GBP 230,000 including VAT, or if you expect it to exceed that in the next 30 days. After leaving you cannot rejoin for 12 months. Many businesses leave once they become consistent limited cost traders, switching to standard VAT accounting to reclaim input VAT.
Does the Flat Rate Scheme affect my income tax?
It can. Under the scheme you may keep a surplus between the VAT you charge customers and the flat rate you pay HMRC. That surplus counts as taxable business income, so it is subject to income tax and, for the self-employed, Class 4 National Insurance. Conversely the extra VAT a limited cost trader pays is a deductible business cost. Always look at the combined VAT and income tax picture, not VAT alone.
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VAT Flat Rate Scheme and the Limited Cost Trader Rule Explained (2026/27)
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