The VAT Flat Rate Scheme: When It Saves You Money and When It Doesn't
The Flat Rate Scheme sounds like a no-brainer. For some businesses it genuinely is. For others it's quietly costing them thousands.
The VAT Flat Rate Scheme (FRS) lets UK businesses pay a fixed percentage of their gross (VAT-inclusive) turnover to HMRC, rather than tracking input and output VAT on every transaction. The pitch is simplicity. The reality is that simplicity sometimes comes at a price — or delivers a windfall, depending on your cost structure.
How It Works
Under standard VAT, you charge 20% on sales, reclaim 20% on qualifying purchases, and pay the difference to HMRC.
Under the Flat Rate Scheme, you still charge customers 20%, but you pay HMRC a sector-specific flat rate — typically 8–14.5% of gross turnover — and keep the difference. You can't reclaim input VAT on purchases (except certain capital items over £2,000).
HMRC publishes flat rates by business category. A management consultant pays 14%, a software developer 14.5%, a catering business 12.5%. The 1% first-year discount for new VAT registrations was abolished from April 2017.
When the Flat Rate Scheme Wins
The FRS works in your favour when your actual input VAT reclaim would be low — that is, when you don't spend much on VAT-able purchases.
Example: a freelance copywriter turning over £80,000 (ex-VAT) charges £96,000 gross. Under standard VAT, they'd pay HMRC roughly £16,000 (£16k output VAT, minimal input VAT to reclaim). Under the FRS at 14.5%, they'd pay £13,920 — keeping roughly £2,080 more per year. That's real money for doing less admin.
The FRS tends to favour service businesses with low overheads: consultants, coaches, designers, IT contractors, freelancers.
When It Costs You
The FRS hurts businesses that spend heavily on VAT-able costs — materials, stock, subcontractors, equipment.
Example: a small construction firm turns over £200,000 ex-VAT. They charge £240,000 gross. Under the FRS at 9.5% (general building), they pay £22,800. But their materials and plant costs are £90,000 ex-VAT — that's £18,000 of input VAT they can't reclaim under the FRS. Under standard VAT, they'd pay £40,000 output VAT minus £18,000 reclaimed = £22,000. The FRS costs them an extra £800 per year and requires barely less admin.
Now scale that to a £500,000 builder with high materials spend and the FRS can be quietly expensive.
The Limited Cost Trader Problem
Since 2017, if your VAT-able purchases (excluding capital assets, food, vehicles) are less than either 2% of your gross turnover or £1,000 per year, HMRC classifies you as a "limited cost trader" and charges a flat rate of 16.5%. At that point the FRS almost never wins.
This catches a lot of IT contractors and consultants who thought they were on a favourable rate. If you registered before 2017 and haven't checked since, check now.
Doing the Maths for Your Business
The crossover calculation is straightforward:
FRS saving = (standard VAT net payment) − (FRS percentage × gross turnover)
If the result is positive, you save. If negative, you lose.
Run it annually — your cost structure changes, HMRC's sector rates occasionally change, and your turnover bracket matters (the FRS is only open to businesses with expected turnover under £150,000 ex-VAT; you must leave once turnover exceeds £230,000 ex-VAT).
What to Do
- If you're a service-led business with overheads under 20% of turnover, the FRS is probably worth modelling.
- If you buy significant stock or materials, run the crossover calculation before assuming simplicity is worth it.
- If you're classified as a limited cost trader, come off the scheme.
- Check your business category against the HMRC FRS rate table — sector misclassification is surprisingly common.
The FRS is one of those things that's easy to set up once and forget. Don't forget it.