VAT Registration Threshold: When You Must Register

VAT Registration Threshold: When You Must Register

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If your business turnover exceeds £90,000 in any rolling 12-month period (2026 threshold), you must register for VAT. Many small businesses fall foul of this by accident. Here’s the practical guide.

The Registration Threshold 2026

Compulsory registration:

• Your taxable turnover exceeds £90,000 in the past 12 months
• OR you expect to exceed £90,000 in the next 30 days alone

Deregistration threshold:

• £88,000 (slightly lower than registration threshold)

These thresholds get reviewed annually.

The Rolling 12-Month Trap

It’s NOT calendar year. It’s the previous 12 months at any point.

Example: You earned £20k each quarter for 4.5 quarters. On the day cumulative trailing 12 months hits £90k, you’re already over the threshold.

You have 30 days to register from that date.

What Counts as “Taxable Turnover”

• Sales of goods and services that would be subject to VAT
• Hire income from VAT-able goods
• Some commission income

Excluded:

• VAT-exempt sales (financial services, insurance, education, healthcare)
• Outside-scope income (private transactions, gifts)
• Sales below the threshold (consider as turnover)

When You Must Register Immediately

Within 30 days, you must:

1. Register for VAT on HMRC online portal
2. Receive VAT registration number (usually 1-3 weeks)
3. Start charging VAT on sales from registration date
4. File quarterly VAT returns

Voluntary Registration (Below Threshold)

Even if you’re under £90k, you can voluntarily register if:

• You want to reclaim VAT on business purchases
• Your customers are mostly VAT-registered (B2B)
• You want to appear bigger/more established

Risk: Adds admin burden and you must charge VAT on sales.

The Math: VAT Costs You Money (Sometimes)

Without VAT registration:

• Sell to private customers at £100
• Keep £100 (gross)

With VAT registration:

• Sell to private customers at £120 (£100 + 20% VAT)
• Customer paying more
• You keep £100 (you remit £20 to HMRC)
• BUT you can reclaim VAT on business expenses

For customers who are private individuals (B2C), VAT registration usually hurts profitability — you have to choose between absorbing the £20 or losing business.

For B2B (customers are also VAT-registered), VAT is neutral to your customer (they reclaim it). You retain your full £100.

Flat Rate Scheme

For businesses under £150k turnover, the flat rate scheme simplifies VAT:

• Pay a flat percentage of gross turnover (varies by industry, 10–16.5%)
• Cannot reclaim input VAT on most purchases
• Less paperwork

When it works:

• Service businesses with low overheads
• Consulting, legal, accounting

When it doesn’t:

• Businesses with high VAT-able expenses
• Manufacturing or retail with stock

Common VAT Mistakes

1. Underestimating rolling turnover Many businesses think calendar year. The 12-month rolling is stricter.

2. Not registering within 30 days Penalties up to 100% of underpaid VAT for late registration.

3. Forgetting Making Tax Digital (MTD) Since April 2022, MTD for VAT applies to all VAT-registered businesses. You must use compatible software.

4. Mixing VAT-able and exempt income If you sell both, your VAT calculations get complex. Partial exemption rules apply.

Penalty Regime

• Late registration: Penalty up to 100% of VAT owed
• Late filing: £100 (for occasional default), escalating
• Late payment: Default surcharge plus interest
• Errors over £10k: Investigation likely

What VAT Lets You Reclaim

You can reclaim VAT on:

• Business equipment, supplies, software
• Travel and accommodation (sometimes)
• Professional fees (accountants, lawyers)
• Marketing and advertising
• Mobile phones (partial, business use)
• Cars and fuel (very limited)

Strategy if Approaching Threshold

If you’re hitting £80–85k turnover:

• Option 1: Slow down sales to stay under £90k
• Option 2: Register, charge VAT, take the admin overhead
• Option 3: Restructure business — separate legal entities for related but distinct activities

Many small businesses deliberately cap below threshold to avoid registration complexity.

How to Register

1. Gather business details: company number, address, banking
2. Register at gov.uk under “VAT registration”
3. Choose accounting scheme (standard, flat rate, annual, cash)
4. Set up MTD-compatible software (Xero, QuickBooks, etc.)
5. Update sales documents (invoices, websites, contracts)

Deregistration

If your turnover drops:

• Can deregister if 12-month projection under £88,000
• Reduces admin burden
• Must charge VAT on remaining stock and assets (final return)

💡 Pro Tip: Use cloud accounting software from day one. Tracks turnover automatically and warns when approaching threshold.