The £90,000 VAT Decision

Q: What happens if I miss the Self Assessment deadline?

The Self Assessment deadline is 31 January (online filing) for the previous tax year. Miss it and HMRC apply an automatic £100 penalty. Beyond that: £10 per day from 3 months late (capped at £900), 5% of tax due at 6 months late, and another 5% at 12 months late, under Schedule 55 of the Taxes Management Act 1970. If you have a genuine reason (serious illness, bereavement, technical issue with HMRC's systems) you can appeal with evidence; HMRC accepts reasonable excuse appeals in most genuine cases.

Q: Do I need an accountant or can I file Self Assessment myself?

Legally you can file Self Assessment yourself via gov.uk for free, most simple sole-trader returns (single income source, basic expenses) are realistic to self-file. An accountant adds real value when: your trading profit is above £40,000 (extraction-strategy decisions matter), you have multiple income streams (PAYE + self-employment + property + dividends), you've crossed the £90,000 VAT threshold, you're considering incorporation, or you have an HMRC enquiry. Expect to pay £400-£1,500/year for a typical sole-trader accountant; the cost is itself a deductible expense.

Q: How do payments on account work?

When your Self Assessment tax bill exceeds £1,000 for the first time, HMRC requires payments on account toward NEXT year's tax. Half the current bill is due 31 January (alongside the current bill); the other half is due 31 July. So your first January after crossing the threshold can hit with a double-bill: last year's balance + first payment on account. Adjust via Form SA303 if you expect next year's income to drop substantially. Payments on account don't apply if more than 80% of your tax is collected via PAYE.

Q: What triggers the 30-day forward test for VAT registration?

Two separate tests apply. The backward (historic) test: at the end of every month, look at your rolling 12-month taxable turnover. If it exceeds £90,000, you must register from the first day of the second following month and notify HMRC within 30 days of the end of the month you crossed. The forward test: if at any point you reasonably expect your taxable turnover in the next 30 days alone to exceed £90,000 (e.g. you sign one big contract), you must register from the date that expectation arose and notify HMRC by the end of those 30 days. The forward test catches lump-sum contracts the historic test would miss.

Q: Can I avoid VAT by splitting my business into two entities?

Almost certainly no. HMRC actively challenges 'business splitting' or 'disaggregation' under VATA 1994 Schedule 1 paragraph 1A and Notice 700/1. If two notionally separate businesses share customers, premises, equipment, staff, banking or financial interdependence, HMRC can direct that they be treated as a single taxable person and assess VAT plus penalties. Genuinely independent businesses (different owners, no financial interdependence, arm's-length transactions) survive scrutiny; an artificial split of one business across a sole trader and a spouse's sole trader almost never does.

Q: What is the limited cost trader trap in the Flat Rate Scheme?

From 1 April 2017 anyone in the Flat Rate Scheme who is a 'limited cost trader' must use a 16.5% flat rate regardless of their trade — wiping out the FRS benefit entirely. A limited cost trader is one whose goods (not services) cost less than 2% of VAT-inclusive turnover, or less than £1,000 a year. This catches most consultants, software businesses, designers and other service-only operators who joined FRS expecting a low trade rate. Test this every quarter; one quarter as a limited cost trader and you must apply 16.5% for that quarter.

Q: How does the Cash Accounting Scheme differ from standard VAT?

Standard VAT accounting accounts for output VAT on the invoice date and input VAT on the supplier invoice date, regardless of when cash moves. The Cash Accounting Scheme (VAT Notice 731, available up to £1.35m taxable turnover) accounts for VAT only when the cash actually moves — you pay output VAT when the customer pays you and reclaim input VAT only when you pay the supplier. This is materially better for businesses with late-paying customers (you don't fund HMRC for cash you haven't received) and materially worse for businesses that pay suppliers fast and get paid slowly. It is independent of the Flat Rate Scheme — you choose standard / FRS, then separately choose cash / accrual.

When registration is compulsory, when it's smart, and which scheme saves you most

Crossing £90,000 of taxable turnover on a rolling 12-month basis makes VAT registration compulsory under VATA 1994 Schedule 1. You must notify HMRC within 30 days of the end of the month you breach the threshold. Late registration means HMRC backdates your registration and you owe VAT on all sales from that date — even if you never charged customers. Below £90,000, voluntary registration can benefit B2B businesses with high input VAT costs but typically damages B2C businesses that cannot pass 20% on to price-sensitive consumers.

Last reviewed: 26 May 2026

Guidance, not advice. We explain the rules, we don't assess your situation. Always seek financial or tax advice from your accountant, or contact HMRC. Read our editorial scope →

The £90,000 trigger

VAT registration in the UK is governed by VATA 1994 Schedule 1. The rule is mechanical: at the end of every month, look at your rolling 12-month taxable turnover. If it has exceeded £90,000 at the end of any month, you must notify HMRC within 30 days of the end of that month, and you are registered from the first day of the second following month. A separate forward test applies if you expect to breach £90,000 in the next 30 days alone (e.g. a single large contract). Late registration is enforced under FA 2008 Schedule 41 — HMRC backdates your registration to the date you should have registered and you owe VAT on all sales since that date. You can rarely recover that VAT from customers after the event; it comes straight out of your margin, alongside penalties of up to 100% of the VAT due for deliberate concealment.

Threshold history

The VAT registration threshold rose from £85,000 to £90,000 on 1 April 2024 — the first increase since 2017. The deregistration threshold rose in parallel from £83,000 to £88,000. Both thresholds are frozen until April 2027, meaning fiscal drag will pull more businesses across them every year as inflation pushes prices up. The UK threshold is materially higher than the EU norm (most EU countries sit between €25,000 and €50,000), which is why small UK businesses uniquely face a 'bunching' problem around the threshold — many deliberately turn work down to stay below.

Voluntary registration: who should register early?

Below £90,000 turnover, VAT registration is optional. Whether it helps depends almost entirely on whether your customers can reclaim the VAT you charge.

Register voluntarily if

Most of your customers are VAT-registered businesses (B2B) — they reclaim your 20% so it costs them nothing, while you reclaim input VAT on your costs. You have significant input VAT on equipment, software, materials or services — voluntary registration unlocks those reclaims. You want the credibility of a VAT number for B2B credibility (some larger procurement teams will not engage with non-VAT suppliers).

Do not register voluntarily if

Most of your customers are consumers (B2C) — they cannot reclaim your VAT, so either your prices rise 20% (and you lose price-sensitive customers) or you absorb the VAT (and your net margin drops by ~16.7%). Your input VAT is low (services, low overheads). You are comfortably below the threshold with no near-term plan to approach it.

The grey zone

Mixed B2B/B2C businesses (e.g. a graphic designer with both agency clients and direct-to-consumer Etsy customers) need to model the blend. If 70%+ of revenue is B2B, voluntary registration typically pays. If 70%+ is B2C, it typically doesn't. The 30-70 zone needs a per-customer model.

Standard VAT accounting

The default scheme. Charge 20% on standard-rated sales, reclaim 20% on standard-rated purchases, submit a VAT return quarterly to HMRC. Returns and payments are due 1 month and 7 days after the quarter end. MTD for VAT is mandatory for all VAT-registered businesses (since April 2022) — you must keep digital records and file via MTD-compliant software. Budget £15–£50/month for cloud accounting software (Xero, QuickBooks, FreeAgent, ANNA). The administrative burden is real: 4 returns a year, digital records of every transaction, and a points-based penalty system for late returns.

Flat Rate Scheme

The Flat Rate Scheme (VATA 1994 s.26B; Notice 733) lets eligible small businesses pay a single flat percentage of their VAT-inclusive turnover instead of doing the standard output-minus-input calculation. Join limit: £150,000 taxable turnover ex VAT. Leave limit: £230,000 ex VAT. You still charge 20% to customers but pay a lower percentage to HMRC, keeping the difference. You generally cannot reclaim input VAT (except on single capital items over £2,000). A 1% discount applies in the first year of registration. The flat rate depends on your trade — examples below.

Selected Flat Rate Scheme percentages by trade (2025/26)

Trade category	Flat rate %
Limited cost trader (any trade with goods <2% of VAT-inclusive turnover or <£1,000/year)	16.5%
Management consultancy	14.0%
Computer and IT consultancy or data processing	14.5%
Accountancy or book-keeping	14.5%
Hairdressing or other beauty treatment services	13.0%
Photography	11.0%
Architect, civil and structural engineer or surveyor	14.5%
Estate agency or property management services	12.0%
Plumbing, heating or air-conditioning installation	9.5%
Building or construction services (labour-only)	14.5%
General building or construction services (materials supplied)	9.5%
Retailing food, confectionery, tobacco, newspapers or children's clothing	4.0%
Pubs	6.5%
Hotel or accommodation	10.5%
Restaurants and takeaways	12.5%
Repairing vehicles	8.5%
Transport or storage, including couriers, freight, removals and taxis	10.0%

Standard vs FRS: worked example

Take a business with £90,000 ex-VAT turnover, all sales standard-rated, low input VAT (£500 of reclaimable input VAT per year). Customer pays £108,000 inc VAT.

£90,000 turnover, low input VAT — standard vs FRS comparison

Scheme	Output VAT charged	Input VAT reclaimed	Net VAT paid to HMRC
Standard accounting	£18,000	£500	£17,500
FRS — management consultancy 14% on £108k	£18,000 (kept on invoice)	£0 (cannot reclaim)	£15,120
FRS — plumbing 9.5% on £108k	£18,000 (kept on invoice)	£0 (cannot reclaim)	£10,260
FRS — limited cost trader 16.5% on £108k	£18,000 (kept on invoice)	£0 (cannot reclaim)	£17,820

Cash Accounting Scheme

Cash Accounting (VAT Notice 731) lets you account for VAT only when cash moves — pay output VAT when the customer actually pays you, reclaim input VAT when you actually pay the supplier. Available up to £1.35m taxable turnover. The benefit: you never fund HMRC for VAT you haven't yet received. The cost: input VAT reclaims are delayed until you pay suppliers. Best for businesses with slow-paying B2B customers; worst for businesses paid quickly but who pay suppliers on long credit terms. Independent of the Flat Rate Scheme — you can be standard + cash, standard + accrual, or FRS (FRS has its own cash-based variant).

Annual Accounting Scheme

Annual Accounting (VAT Notice 732) replaces four quarterly returns with one annual return. You make 9 monthly or 3 quarterly interim payments based on the previous year's liability, then a balancing payment with the annual return. Available up to £1.35m. The benefit: lower administrative burden and predictable cashflow. The cost: less responsive to changing business size, and the balancing payment can be a shock if you have grown. Most often combined with FRS for the simplest possible compliance.

Pricing: add 20% or absorb it?

Once VAT-registered, B2B is easy — always add 20% on top, the customer reclaims, no behavioural change. B2C is the hard problem.

Plumber example

A domestic plumber currently charges £200 per job. After VAT registration: option A is charge £240 (£200 + £40 VAT) — customer pays 20% more, some will balk. Option B is keep charging £200 inclusive — your net per job drops to £166.67, a 16.7% margin hit. Most domestic trades try option A, lose some price-sensitive customers, and end up at a blended ~10–12% net revenue drop after attrition.

Designer example

A freelance designer billing £5,000/month to a single B2B agency client just adds 20% — agency reclaims, nothing changes. The same designer with five direct-to-consumer Etsy shops as clients faces the plumber's problem at scale. The 'mix' matters more than the headline turnover.

Practical defence

Many trades approaching the threshold either deliberately delay growth past the £90,000 line (the 'bunching' effect), or push through to £130,000+ where the absolute £ benefit of the larger trade book outweighs the VAT margin hit. Stopping at £92,000 is usually the worst position — VAT cost without the volume to absorb it.

Partial exemption

If you make both taxable supplies (standard, reduced, or zero-rated) and exempt supplies (e.g. financial services, insurance, education, certain healthcare, residential property letting), you are partially exempt. Input VAT directly attributable to taxable supplies is fully reclaimable; input VAT on exempt supplies is not; and input VAT on overheads must be apportioned. The 'standard method' is turnover-based (taxable turnover / total turnover). A de minimis rule allows full reclaim if exempt input VAT is under £625/month on average and under 50% of total input VAT. Partial exemption is one of the most-litigated areas of VAT — get specialist advice if you are anywhere near the boundary.

Deregistration

You can voluntarily deregister if your taxable turnover for the next 12 months will be below £88,000 (the deregistration threshold). You must deregister if you stop making taxable supplies entirely. On deregistration, you may owe VAT on the deemed disposal of remaining business stock and assets at market value (if the VAT due exceeds £1,000) — Schedule 4 of VATA 1994. Forgetting this 'deemed supply' is a common closing-down trap.

MTD for VAT

Making Tax Digital for VAT is mandatory for all VAT-registered businesses. Requirements: keep digital records of every transaction in MTD-compliant software, file VAT returns through API-linked software (not the gov.uk portal), and maintain digital links between systems. Penalties operate on a points-based system: each late return earns 1 point; at 4 points (for quarterly returns) you hit the threshold and pay a £200 penalty, plus £200 for each subsequent late return until you have a clean 12-month period. Points last 24 months. Late payment penalties are separate: 2% at day 15, +2% at day 30, +4% annualised from day 31.

Worked scenarios

Three turnover positions, with the typical decision at each.

£60,000 turnover — voluntary zone

Well below the threshold. Decision depends entirely on customer mix and input VAT.

£90,000 turnover — just hit threshold (low input VAT, services)

Standard scheme: £18,000 output − £500 input = £17,500 net. FRS at 14%: £108,000 × 14% = £15,120. FRS saves ~£2,400/year + simpler returns.

£150,000 turnover — past the FRS join limit

Cannot join FRS afresh (must already be in to stay until £230k leave limit). Standard accounting only. Cash accounting still available up to £1.35m.

Scheme comparison at three turnover levels (low input VAT, 14% FRS trade)

Turnover (ex VAT)	Standard net VAT	FRS net VAT	Best choice
£60,000 (voluntary)	£11,500	£10,080	FRS if registering
£90,000 (compulsory)	£17,500	£15,120	FRS
£150,000 (past FRS join limit)	£29,500	n/a — cannot join	Standard + Cash Accounting

Decision framework

A seven-step process when you are within 12 months of the threshold or considering voluntary registration.

☐Confirm the numbers: calculate rolling 12-month taxable turnover and your input VAT base over the last 12 months
☐Segment customers by B2B vs B2C — model the price-pass-through assumption for the B2C share
☐Estimate input VAT — high input VAT favours standard accounting; low input VAT favours FRS (subject to limited cost trader test)
☐Test FRS vs standard at your specific trade rate using the worked example structure above
☐Choose timing scheme: Cash Accounting if customers pay slowly; Annual Accounting if you want predictable monthly outflows
☐Pick MTD-compliant software (Xero, QuickBooks, FreeAgent, ANNA) and budget £15–£50/month
☐Think ahead on deregistration — note the £88,000 lower threshold and the deemed-supply trap on closing stock and assets

Statute references: VATA 1994 Schedule 1; VATA 1994 s.26B (Flat Rate Scheme); FA 2008 Sch 41 (Failure to Notify); VAT Notice 700/1 (registration); VAT Notice 733 (Flat Rate Scheme); VAT Notice 731 (Cash Accounting); VAT Notice 732 (Annual Accounting).

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Frequently asked questions

What happens if I miss the Self Assessment deadline?+

The Self Assessment deadline is 31 January (online filing) for the previous tax year. Miss it and HMRC apply an automatic £100 penalty. Beyond that: £10 per day from 3 months late (capped at £900), 5% of tax due at 6 months late, and another 5% at 12 months late, under Schedule 55 of the Taxes Management Act 1970. If you have a genuine reason (serious illness, bereavement, technical issue with HMRC's systems) you can appeal with evidence; HMRC accepts reasonable excuse appeals in most genuine cases.

Do I need an accountant or can I file Self Assessment myself?+

Legally you can file Self Assessment yourself via gov.uk for free, most simple sole-trader returns (single income source, basic expenses) are realistic to self-file. An accountant adds real value when: your trading profit is above £40,000 (extraction-strategy decisions matter), you have multiple income streams (PAYE + self-employment + property + dividends), you've crossed the £90,000 VAT threshold, you're considering incorporation, or you have an HMRC enquiry. Expect to pay £400-£1,500/year for a typical sole-trader accountant; the cost is itself a deductible expense.

How do payments on account work?+

When your Self Assessment tax bill exceeds £1,000 for the first time, HMRC requires payments on account toward NEXT year's tax. Half the current bill is due 31 January (alongside the current bill); the other half is due 31 July. So your first January after crossing the threshold can hit with a double-bill: last year's balance + first payment on account. Adjust via Form SA303 if you expect next year's income to drop substantially. Payments on account don't apply if more than 80% of your tax is collected via PAYE.

What triggers the 30-day forward test for VAT registration?+

Two separate tests apply. The backward (historic) test: at the end of every month, look at your rolling 12-month taxable turnover. If it exceeds £90,000, you must register from the first day of the second following month and notify HMRC within 30 days of the end of the month you crossed. The forward test: if at any point you reasonably expect your taxable turnover in the next 30 days alone to exceed £90,000 (e.g. you sign one big contract), you must register from the date that expectation arose and notify HMRC by the end of those 30 days. The forward test catches lump-sum contracts the historic test would miss.

Can I avoid VAT by splitting my business into two entities?+

Almost certainly no. HMRC actively challenges 'business splitting' or 'disaggregation' under VATA 1994 Schedule 1 paragraph 1A and Notice 700/1. If two notionally separate businesses share customers, premises, equipment, staff, banking or financial interdependence, HMRC can direct that they be treated as a single taxable person and assess VAT plus penalties. Genuinely independent businesses (different owners, no financial interdependence, arm's-length transactions) survive scrutiny; an artificial split of one business across a sole trader and a spouse's sole trader almost never does.

What is the limited cost trader trap in the Flat Rate Scheme?+

From 1 April 2017 anyone in the Flat Rate Scheme who is a 'limited cost trader' must use a 16.5% flat rate regardless of their trade — wiping out the FRS benefit entirely. A limited cost trader is one whose goods (not services) cost less than 2% of VAT-inclusive turnover, or less than £1,000 a year. This catches most consultants, software businesses, designers and other service-only operators who joined FRS expecting a low trade rate. Test this every quarter; one quarter as a limited cost trader and you must apply 16.5% for that quarter.

How does the Cash Accounting Scheme differ from standard VAT?+

Standard VAT accounting accounts for output VAT on the invoice date and input VAT on the supplier invoice date, regardless of when cash moves. The Cash Accounting Scheme (VAT Notice 731, available up to £1.35m taxable turnover) accounts for VAT only when the cash actually moves — you pay output VAT when the customer pays you and reclaim input VAT only when you pay the supplier. This is materially better for businesses with late-paying customers (you don't fund HMRC for cash you haven't received) and materially worse for businesses that pay suppliers fast and get paid slowly. It is independent of the Flat Rate Scheme — you choose standard / FRS, then separately choose cash / accrual.