Comparison Guide · 2026-07-10

VAT Flat Rate Scheme vs Cash Accounting Scheme UK 2026/27

Small UK businesses have several optional VAT schemes designed to reduce admin or smooth cash flow, and the Flat Rate Scheme and Cash Accounting Scheme are two of the most commonly confused. They solve different problems: the Flat Rate Scheme replaces detailed input-VAT tracking with a single fixed percentage of turnover (available to businesses with turnover up to £150,000), while Cash Accounting simply changes when VAT is accounted for — on money received and paid, rather than on invoices issued and received (available up to £1.35 million turnover). You can use one, the other, or neither, but not both together.

Last updated: 10 July 2026Last reviewed: 10 July 2026How we verify

At a Glance

Feature	Flat Rate Scheme	Cash Accounting Scheme
What it changes	How much VAT you pay — a fixed % of turnover instead of output minus input VAT	When you account for VAT — on cash received/paid, not on invoices
Join threshold	Expected turnover £150,000 or less (VAT-exclusive)	Expected turnover £1.35 million or less
Leave threshold	VAT-inclusive turnover over £230,000	Turnover over £1.6 million
Input VAT reclaim on purchases	Not normally reclaimable (included in the flat rate), except single purchases of £2,000+	Reclaimable as normal, but only once you have paid the supplier
Limited cost trader rate	16.5% flat rate applies if goods spend is very low	Not applicable
First-year discount	1 percentage point off your flat rate	Not applicable
Best suited to	Businesses with low costs relative to turnover, wanting simpler records	Businesses with slow-paying customers, wanting smoother cash flow

When the Flat Rate Scheme Wins

You have relatively low business costs, so your true output-minus-input VAT liability would be close to (or higher than) the sector flat rate anyway
You want the simplest possible VAT record-keeping, without tracking and reclaiming VAT on every individual purchase
You are in your first year of VAT registration and can benefit from the 1 percentage point discount

When Cash Accounting Wins

Your customers routinely pay late, and standard invoice accounting would force you to pay VAT to HMRC before you have collected it from them
Your turnover is too high to qualify for the Flat Rate Scheme, but still within the £1.35 million Cash Accounting threshold
You want your VAT liability to naturally track your actual cash position, reducing the risk of a cash-flow squeeze around VAT payment dates

How to Actually Decide Between Them

The right starting point is to work out which problem you actually have. If your main frustration is the administrative burden of logging and reclaiming VAT on every purchase — receipts, invoices, apportioning between business and personal use — the Flat Rate Scheme addresses that directly by replacing it all with one percentage. If your main frustration is cash flow — VAT falling due on invoices your customers have not yet paid — Cash Accounting addresses that directly, without changing how much VAT you ultimately owe over time.

It is worth running the actual numbers before committing to the Flat Rate Scheme in particular, because unlike Cash Accounting (which is cash-flow neutral over time), the Flat Rate Scheme can genuinely increase or decrease your total VAT bill compared with standard accounting, depending on how your real costs compare with the assumptions built into your sector's flat rate. Many businesses find it worth reviewing this annually, since costs and turnover can shift the comparison from one year to the next, and you must in any case leave the Flat Rate Scheme once your turnover crosses the exit threshold.

Worked Example: IT Consultant with Low Costs

A sole trader IT consultant invoices £120,000 (VAT-exclusive) a year, charging clients the standard 20% VAT rate, and has very low goods costs — well under the 2% limited-cost-trader threshold — so their applicable Flat Rate Scheme percentage is the 16.5% limited cost trader rate.

Under standard accounting, they charge £24,000 of output VAT on their £120,000 fees. With minimal reclaimable input VAT (say £600 across the year, given their low costs), they would pay HMRC roughly £23,400.

Under the Flat Rate Scheme, they apply 16.5% to their VAT-inclusive turnover of £144,000 (£120,000 + £24,000 VAT), producing a flat rate payment of £23,760 — slightly more than the standard accounting result in this case, illustrating why the limited-cost-trader rate is deliberately set to remove most of the benefit for businesses with very few costs. A first-year 1 percentage point discount (effectively 15.5%) would narrow but not eliminate this gap. This consultant might reasonably conclude that Cash Accounting (if clients pay slowly) or standard accounting (if clients pay promptly) suits them better than the Flat Rate Scheme.

Frequently Asked Questions

What problem does the Flat Rate Scheme solve?

It replaces the need to track and reclaim input VAT on every purchase. Instead, you charge customers standard VAT as normal but pay HMRC a single fixed percentage of your VAT-inclusive turnover, set by your trade sector, keeping far less detailed VAT records.

What problem does the Cash Accounting Scheme solve?

It solves a cash-flow timing problem, not a record-keeping one. Under standard VAT accounting, you owe VAT on invoices issued even if the customer has not paid you yet. Cash Accounting lets you account for VAT only when you actually receive or pay money, which helps businesses with slow-paying customers avoid funding HMRC out of their own cash flow.

Can I use both schemes together?

No — the Flat Rate Scheme has its own built-in cash-basis-like turnover test and cannot be combined with the Cash Accounting Scheme. You choose one or the other (or neither, using standard invoice-based accounting).

Show 7 more questions

Who can join the Flat Rate Scheme?

Businesses expecting VAT-exclusive taxable turnover of £150,000 or less in the next 12 months can join. You must leave once your VAT-inclusive turnover in the previous 12 months exceeds £230,000, or you expect it to in the next 30 days alone.

Who can join the Cash Accounting Scheme?

Any VAT-registered business with expected VAT-taxable turnover of £1.35 million or less in the next 12 months can normally join, without needing HMRC's prior approval, and can generally stay in the scheme until turnover exceeds £1.6 million.

What is the 'limited cost trader' rate under the Flat Rate Scheme?

Businesses that spend very little on goods (goods costing less than 2% of turnover, or under £1,000 a year even if that is more than 2%) must use a fixed 16.5% flat rate regardless of their actual trade sector, which is deliberately set close to the standard rate to reduce the benefit for businesses with minimal costs, such as many consultants and contractors.

Is there a discount for new businesses on the Flat Rate Scheme?

Yes — a 1 percentage point reduction applies to your flat rate for the first year you are VAT registered, on top of your normal sector or limited-cost-trader rate.

Does Cash Accounting change how much VAT I ultimately pay?

No — it only changes the timing of when VAT is accounted for, not the total amount due over the life of the business. The Flat Rate Scheme, by contrast, can genuinely change the total amount of VAT you pay, because the fixed percentage may be more or less than your true output-minus-input VAT position.

Can I reclaim VAT on large capital purchases under the Flat Rate Scheme?

Only in limited circumstances — mainly for a single capital asset purchase of £2,000 or more (including VAT), where you can reclaim the input VAT separately even while on the Flat Rate Scheme. Day-to-day purchases are not separately reclaimable, since the flat rate is meant to already account for them.

Which scheme is better for a small consultancy with few costs and prompt-paying clients?

Neither is likely to help much: as a limited cost trader, the Flat Rate Scheme's 16.5% rate offers little or no benefit over standard accounting, and with prompt-paying clients, Cash Accounting's cash-flow benefit is minimal since invoices are settled quickly anyway. Standard invoice accounting, or simply comparing the numbers directly, is often the better route in this specific case.

Key Sources

Related Comparisons

VAT Cash Accounting vs Annual Accounting Scheme,VAT Flat Rate: Limited Cost Trader vs Sector Rate

Calculators for this comparison

Calculate your VAT Flat Rate

Work out VAT owed to HMRC under the Flat Rate Scheme by trade sector, and compare it with standard VAT.

VAT Reverse Charge tool

Work out invoice totals under the domestic reverse charge for building and construction services.

Calculate your Income Tax

Work out how much income tax you owe using the latest 2025/26 UK tax bands.

Corporation Tax Calculator

Calculate Corporation Tax for UK limited companies for 2025/26.

About the author

James Morgan

Property & Mortgage Writer

James Morgan has been writing about UK property and mortgages since 2016. He covers the full purchase journey — affordability checks, mortgage product comparison, the deposit and loan-to-value puzzle, stamp duty (SDLT in England and Northern Ireland, LBTT in Scotland, LTT in Wales), first-time buyer reliefs, conveyancing costs, and what to expect at completion. James also writes on the landlord side: buy-to-let mortgages, the 3% additional-property SDLT surcharge, Section 24 finance-cost restriction, rental yield maths, and the practical realities of being a small private landlord in the post-2017 tax regime. He has a particular interest in the remortgage decision — when to switch product, the trade-off between rate and arrangement fee, early repayment charges, and how to read a mortgage offer document. James's mortgage worked examples are built up from the underlying amortisation schedule, not borrowed from comparison sites, and stamp-duty figures are verified band-by-band against the HMRC SDLT calculator. He writes to CalcHub's editorial standards, with primary-source citations to HMRC, Revenue Scotland and the Welsh Revenue Authority, and clear disclosure that CalcHub does not sell mortgages or take affiliate commission on regulated mortgage products.

Property journalist since 2016
UK mortgage and stamp-duty specialism (SDLT, LBTT, LTT)
Writes to CalcHub editorial standards (primary-source citation, annual review)

mortgagesstamp-dutysdltlbttlttbuy-to-letfirst-time-buyersremortgagerental-yield

Disclaimer: This comparison is general information, not personal financial advice. Figures reflect the 2026/27 UK tax year and can change. Always check current HMRC/gov.uk guidance or speak to an accountant before making a decision.