When and How to Register for VAT in the UK (2026 Guide)

VAT is one of the most significant compliance obligations facing UK businesses. Whether you are approaching the registration threshold, considering voluntary registration, or choosing between VAT schemes, the decisions you make now will affect your cash flow and administration for years. This guide covers everything you need to know for 2026.

The Compulsory Registration Threshold

You must register for VAT if your taxable turnover exceeds £90,000 in any rolling 12-month period. This threshold was raised from £85,000 in April 2024 and is frozen at £90,000 until at least April 2028 under the current government's plans.

What Counts as "Taxable Turnover"?

Taxable turnover includes all sales of goods or services that are subject to VAT at any rate — standard rate (20%), reduced rate (5%), or zero rate (0%). It does not include:

• Exempt supplies (e.g., most financial services, insurance, residential property rental, education provided by eligible bodies)
• Out-of-scope transactions

If you make a mix of taxable and exempt supplies, only the taxable portion counts towards the registration threshold.

The Rolling 12-Month Rule

This catches many businesses by surprise. You must check your cumulative taxable turnover at the end of every month looking back 12 months. It is not a calendar year check.

Example: Your monthly turnover for the past 12 months totals:

• Months 1–10: £7,000/month = £70,000
• Month 11: £12,000 → running total: £82,000
• Month 12: £9,000 → running total: £91,000 ← threshold exceeded

You must notify HMRC within 30 days of the end of the month in which the threshold was exceeded, and register by the first day of the second month after that. In this example, you register from the start of month 14.

Penalties for late registration apply — a percentage of the VAT that should have been collected, ranging from 5% to 15% depending on how late.

Voluntary Registration

You can register for VAT at any turnover level, provided you make (or intend to make) taxable supplies. Voluntary registration is worth considering when:

When Voluntary Registration Makes Sense

• Most of your customers are VAT-registered businesses: they can reclaim the VAT you charge, so your prices are unaffected. You gain the ability to reclaim input VAT on your purchases
• You have significant input VAT: if you buy materials, equipment, or services with VAT attached, reclaiming it can be valuable — especially for trades like construction
• You want to appear more established: a VAT number on invoices signals that turnover exceeds (or is approaching) the threshold, which can influence some procurement decisions

When Voluntary Registration Hurts

• Your customers are consumers (B2C): adding 20% VAT to your prices either makes you uncompetitive or erodes your margins
• Most of your inputs are VAT-free: if your main costs are wages, rent (where not opted to tax), or insurance, there is little input VAT to reclaim
• Admin burden is a concern: VAT returns are quarterly (or monthly), and MTD compliance adds software costs

How to Register

Registration is done online at www.gov.uk/register-for-vat. You will need:

1. Your Unique Taxpayer Reference (UTR) or company registration number
2. National Insurance number (sole traders) or company details
3. Bank account details
4. Details of your business activity
5. Turnover information

Processing time is typically 3–5 working days for straightforward online applications. You will receive a VAT registration certificate (VAT4) with your VAT number in the format GB 123 4567 89.

UK VAT Rates

The difference between zero-rated and exempt matters: for zero-rated supplies, you charge VAT at 0% (effectively nothing) but can still reclaim input VAT. For exempt supplies, you charge no VAT and cannot reclaim input VAT attributable to those supplies.

VAT Accounting Schemes

HMRC offers several schemes that change how you account for and pay VAT.

Standard VAT Accounting

Default method: you account for VAT based on invoice date. You include VAT on all invoices issued in the quarter, whether or not paid. You reclaim VAT on all purchase invoices received in the quarter.

Straightforward but can create cash flow issues if customers are slow to pay — you remit VAT before receiving it.

Cash Accounting Scheme

Available to businesses with turnover up to £1.35m/year. You account for VAT when cash is received (for sales) and when cash is paid (for purchases). Benefits:

• No VAT paid on bad debts
• Better cash flow alignment

Drawback: if you receive deposits or progress payments, timing gets complex.

Annual Accounting Scheme

Available to businesses with turnover up to £1.35m/year. You make nine monthly or three quarterly interim payments (based on your previous year's liability), then file one annual return and pay any balance (or receive a refund). Reduces paperwork to one return per year.

Flat Rate Scheme

Available to businesses with taxable turnover up to £150,000/year (exclusive of VAT). You pay HMRC a fixed percentage of your VAT-inclusive turnover, rather than calculating actual input and output VAT.

The flat rate varies by trade sector, ranging from 4% (retailers of food/confectionery/tobacco) to 14.5% (IT consultants, accountants, management consultants). The saving arises when your actual net VAT (output minus input) is higher than the flat rate percentage.

Example: IT consultant with £100,000 annual VAT-inclusive turnover.

• Standard accounting: charge 20% VAT (£16,667 on £83,333 net sales) = £16,667 output VAT; reclaim, say, £2,000 input VAT; net pay: £14,667
• Flat Rate Scheme at 14.5%: pay £100,000 × 14.5% = £14,500; saving = £167

The saving seems small here, but service businesses with very little input VAT can benefit more significantly. There is also a 1% discount in your first year of VAT registration under the scheme.

"Limited cost trader" surcharge: businesses spending less than 2% of VAT-inclusive turnover on goods (not services) must use a flat rate of 16.5%, which eliminates most of the benefit for pure service businesses.

Making Tax Digital for VAT

Since April 2022, all VAT-registered businesses must:

1. Keep digital VAT records in MTD-compatible software
2. Submit VAT returns directly via software using HMRC's API (not via the old VAT online account)

Compatible software includes Xero, QuickBooks, FreeAgent, Sage, and many others. Bridging software is available if you want to keep records in Excel. Costs range from free (some small business accounting packages) to £30+/month for full-featured platforms.

Non-compliance with MTD obligations can result in penalties under the new points-based penalty system introduced in January 2023.

The New Penalty Points System

Since January 2023, HMRC uses a points-based system for late filing penalties:

• Each late VAT return earns 1 penalty point
• Accumulate points to the threshold (4 for quarterly filers, 5 for monthly, 2 for annual) → £200 penalty
• Further £200 penalties for each subsequent late return at threshold
• Points are reset after a period of compliance

Late payment penalties are separate: 2% of unpaid VAT at 15 days, 4% at 30 days, plus interest.

VAT Number Format

UK VAT numbers are in the format GB 000 0000 00. When trading with businesses in EU member states, you may also need an EORI number for customs purposes post-Brexit.

You can verify a UK VAT number at HMRC's VAT number checker. For EU numbers, use the VIES system.

Summary Checklist

Before or after registration, run through this checklist:

1. Monitor rolling 12-month turnover monthly against the £90,000 threshold
2. Decide between voluntary and compulsory registration — consider your customer base and input VAT position
3. Choose an accounting scheme (standard, cash, annual, or flat rate) — review annually
4. Implement MTD-compatible software before registration date
5. Update invoices to include your VAT number, VAT amount, and your address
6. Set aside output VAT in a separate account to avoid cash flow surprises at return time