What Is the Flat Rate VAT Scheme?
The flat rate VAT scheme is a simplified way of accounting for VAT. Instead of calculating the difference between the VAT you charge clients and the VAT you pay suppliers, you pay HMRC a fixed percentage of your gross turnover. That percentage depends on your business sector.
For most agencies, the relevant flat rate is 16.5%. You charge your clients 20% VAT on invoices. You pay HMRC 16.5% of your gross turnover (including VAT). The difference is yours to keep.
That 3.5% margin used to be pure profit. Before 2017, an agency turning over £100k could keep roughly £3,500 a year just from being on the scheme. It was effectively a tax break for administrative simplicity.
Then the limited cost trader rules arrived.
The Limited Cost Trader Rule: Why It Changed Everything
From April 2017, HMRC introduced a new flat rate for businesses with limited costs. If your VAT-inclusive spend on relevant goods is less than 2% of your gross turnover (or less than £1,000 per year if 2% is higher), you are a limited cost trader. Your flat rate becomes 16.5% regardless of sector.
Here is the critical point for agencies: most agencies are limited cost traders. Why? Because the scheme only counts goods, not services. Staff salaries, freelancer payments, software subscriptions, rent, marketing spend, none of these count. Only physical goods like stationery, hardware, and consumables qualify.
If you run a 12-person digital agency billing £800k per year from a serviced office in Manchester Northern Quarter, your relevant goods spend might be £4,000 on laptops and printer paper. That is 0.5% of turnover. You are a limited cost trader. Your flat rate is 16.5%.
What Counts as Relevant Goods?
HMRC defines relevant goods as physical items you buy specifically for your business. The key categories are:
- Computer hardware (laptops, monitors, servers)
- Office supplies (paper, pens, printer cartridges)
- Cleaning materials
- Certain capital equipment
Things that do not count:
- Staff salaries and wages
- Freelancer and contractor fees
- Software licences and subscriptions
- Rent and utility bills
- Marketing and advertising spend
- Travel and subsistence
- Vehicle costs
- Food and drink
This is where agency founders get caught out. You might spend £30k a year on software tools, £200k on freelancers, and £50k on rent. None of it counts. Your relevant goods spend is a few hundred pounds on stationery. You are a limited cost trader.
The Numbers: Does Flat Rate VAT Still Work for Agencies?
Let us run a real example. A web design agency in Bristol Harbourside turns over £120,000 plus VAT. On standard VAT accounting:
- Sales: £120,000 + £24,000 VAT = £144,000 gross
- VAT charged to clients: £24,000
- VAT on expenses (say £30k of purchases including VAT): roughly £5,000
- Net VAT to HMRC: £19,000
On flat rate VAT at 16.5%:
- Gross turnover including VAT: £144,000
- Flat rate payment: £144,000 x 16.5% = £23,760
- You keep: £24,000 - £23,760 = £240
You make £240 extra per year. That is not nothing, but it is a long way from the £3,500-£4,000 you might have kept before 2017.
Now consider a creative agency with higher goods spend. Suppose you buy £8,000 of art supplies, print materials, and hardware per year. Your turnover is £80,000 plus VAT. Your relevant goods spend is 8.3% of turnover. You are not a limited cost trader. Your flat rate is 14.5% (the creative sector rate).
- Gross turnover including VAT: £96,000
- Flat rate payment: £96,000 x 14.5% = £13,920
- You keep: £16,000 - £13,920 = £2,080
That is a meaningful saving. But most agencies do not have that level of goods spend.
When Flat Rate VAT Makes Sense for Agencies
There are three scenarios where the flat rate scheme still works for agency founders.
1. You Have Genuinely High Goods Spend
If your agency buys significant physical goods, print production, exhibition materials, hardware for clients, physical media, you might qualify for the lower sector rate. Check your relevant goods spend as a percentage of turnover. If it exceeds 2%, you are not a limited cost trader and the 14.5% creative rate (or 16.5% general rate) applies.
2. You Are a Very Small Agency with Minimal Expenses
If you are a sole trader web designer turning over £65k with virtually no business purchases, flat rate might still save you a small amount. The administrative simplicity alone can be worth it. You file one VAT return figure instead of itemising input tax. If your time is worth more than the £200-£300 you might lose, flat rate makes sense.
3. You Want Predictable VAT Payments
Flat rate gives you a consistent percentage every quarter. If you are a PR agency with lumpy project income and unpredictable expenses, knowing your VAT bill is 16.5% of gross turnover helps with cash flow forecasting. You lose some margin but gain certainty.
When Flat Rate VAT Hurts Agencies
For most established agencies, flat rate VAT is now a bad deal. Here is why.
You Cannot Reclaim VAT on Major Purchases
Under flat rate, you cannot reclaim VAT on purchases (except for certain capital assets over £2,000 including VAT). If your agency spends £50k on software, £30k on freelancers, and £20k on rent, you are losing the ability to reclaim VAT on those costs. On standard accounting, that £100k of VAT-inclusive costs might give you £16,667 in input VAT recovery. On flat rate, you get nothing.
The Limited Cost Trader Trap
Most agency founders do not realise they are limited cost traders until HMRC asks. If you have been on the 14.5% rate when you should have been on 16.5%, HMRC will backdate the difference plus interest and penalties. We have seen clients with five-figure retrospective bills from this mistake.
Your Margin Disappears as You Grow
At £100k turnover, the flat rate margin might be £200-£300. At £500k turnover, it might be £1,000-£1,500. But your input VAT on costs has grown exponentially. You are losing thousands in unclaimed VAT. The scheme becomes progressively worse as your agency scales.
How to Check Your Flat Rate Status
If you are already on the flat rate scheme, run this check today:
- Calculate your gross turnover including VAT for the last 12 months.
- Add up your spend on relevant goods (physical items only, VAT-inclusive).
- Divide goods spend by gross turnover. Multiply by 100.
- If the result is under 2%, you are a limited cost trader. Your flat rate should be 16.5%.
- If the result is over 2%, you qualify for your sector rate (14.5% for creative agencies, 16.5% for general).
If you have been using the wrong rate, speak to your accountant before HMRC contacts you. The voluntary disclosure process is straightforward but the interest charges add up.
Should You Leave the Flat Rate Scheme?
If your agency is turning over more than £150k and has meaningful expenses, you are almost certainly better off on standard VAT accounting. The ability to reclaim VAT on software, freelancers, and overheads will outweigh the flat rate margin.
Consider this: a digital agency billing £300k per year with £120k of VAT-inclusive costs. On flat rate at 16.5%, they keep roughly £1,050 extra per year. On standard accounting, they reclaim £20,000 in input VAT. They are losing £18,950 by staying on flat rate.
That is a real number. That is cash you could reinvest in the business, take as dividends, or use to hire another team member.
How to Leave the Scheme
You can leave the flat rate scheme at any time. Write to HMRC or use your VAT online account to notify them. You will move to standard VAT accounting from your next return period. You will need to start tracking input VAT on all purchases. Most accounting software like Xero or QuickBooks handles this automatically once you switch the VAT scheme setting.
If you leave within the first 12 months of joining, HMRC may ask you to repay some of the benefit you received. After 12 months, there is no clawback.
What About the Annual Test?
HMRC requires you to review your limited cost trader status annually. If your goods spend percentage changes, your flat rate changes with it. This is where agencies get caught out. You might have a year where you buy several laptops and cross the 2% threshold. The next year you buy nothing and drop back under. Your rate should change each time.
Most agency founders do not run this test. HMRC does. If they find you have been on the wrong rate for multiple years, the backdated bill can be substantial.
The Verdict: Is Flat Rate VAT Worth It for Agencies?
For the vast majority of agency founders in 2025/26, the flat rate VAT scheme is no longer worth it. The limited cost trader rules mean most agencies pay 16.5% and keep very little margin. The administrative simplicity is real, but it rarely justifies the loss of input VAT recovery.
If you are a very small agency with minimal costs and you value simplicity over a few hundred pounds, flat rate might still work. If you are a creative agency with genuine goods spend above 2% of turnover, the 14.5% rate can still deliver meaningful savings.
For everyone else, and that means most agencies reading this, standard VAT accounting will save you more money. The numbers do not lie. Run the calculation for your own agency. If you are unsure, ask your accountant to model both scenarios before your next VAT return.
As ICAEW qualified accountants, we see too many agency founders leaving thousands of pounds on the table by staying on flat rate out of habit. Don't let that be you.
If your contractor mix or cost structure has changed in the last 12 months, ask your accountant before your next VAT quarter ends. A 30-minute review could save you five figures over the next year.