VAT Registration for Small Business UK 2025/26: When and How

Quick answer

VAT is the UK's main consumption tax — 20% on most goods and services. A business must register for VAT if its taxable turnover exceeds £90,000 in any rolling 12-month period (the threshold raised from £85,000 on 1 April 2024).

Below £90,000, registration is voluntary — useful in specific situations.

Once registered:

• Charge VAT on your goods/services.
• Reclaim VAT on business purchases.
• File quarterly VAT returns via MTD-compatible software.
• Pay net VAT (output minus input) to HMRC.

The £90,000 threshold

The threshold is measured over any rolling 12-month period, not a fixed tax year:

• Check your turnover for the past 12 months at the end of each month.
• If it exceeds £90,000 → register within 30 days of the end of that month.
• Also register if you expect turnover to exceed £90,000 in the next 30 days alone.

Taxable turnover = supplies that would be taxable if you were registered (i.e. standard, reduced, or zero-rated). Exempt supplies (insurance, financial services, education, healthcare) don't count.

Practical example

You run a freelance design business with monthly turnover £6,000-£9,000:

• Jan-Dec 2024: £85,000 total.
• Jan-Dec 2025: £92,000 total.

You crossed the threshold during December 2025. You must register by 30 January 2026, with VAT effective from 1 February 2026.

If you delay registration, HMRC backdates registration to when you crossed the threshold — and charges penalties + back-VAT on sales made since then.

Voluntary registration — when it helps

Below £90,000 you can register voluntarily. It helps in these situations:

1. Your customers are VAT-registered

If you sell B2B to VAT-registered companies, they reclaim your VAT. Registering means you can reclaim your input VAT (purchases) without making your effective prices higher to your customers.

2. You have high input VAT

If you spend a lot on VAT-able supplies (subcontractors, equipment, supplies), registration lets you reclaim 20% of those costs back.

3. Credibility signal

VAT registration sometimes implies a more established business — useful for B2B sales.

When voluntary registration hurts

• Your customers are mostly consumers (B2C): they can't reclaim VAT, so your effective prices rise 20%.
• You have low input VAT (a service business with minimal purchases).
• You'd rather avoid the admin cost (quarterly MTD returns).

Standard / reduced / zero rate

Zero-rated and exempt are different:

• Zero-rated: you charge 0% VAT but can reclaim input VAT on costs.
• Exempt: you charge no VAT and cannot reclaim input VAT on related costs.

This distinction is critical for businesses spanning both — partial exemption rules apply.

Flat Rate Scheme

For businesses with turnover under £150,000, the Flat Rate Scheme simplifies VAT:

• You charge customers the normal 20% (or 5%/0%).
• You pay HMRC a flat percentage of gross turnover (varying by industry).
• You don't reclaim input VAT on most purchases (except capital purchases over £2,000).

Common Flat Rate percentages 2025/26:

1% discount for first year of registration.

The "limited cost trader" rate (16.5%) applies if your VAT-able goods purchases are less than 2% of turnover (or under £1,000/year if turnover small). It's punitive — service businesses often hit this rate.

Flat Rate vs Standard — which wins?

For a £100,000 turnover IT consultant with low expenses:

Standard scheme:

• VAT on £100,000 sales: £20,000.
• VAT reclaim on £2,000 of expenses: £400.
• Net VAT to HMRC: £19,600.

Flat Rate Scheme at 14.5%:

• VAT charged to customers: £20,000.
• Flat Rate VAT to HMRC: 14.5% × £120,000 (gross-of-VAT turnover) = £17,400.
• Effective retention: £2,600.

Flat Rate wins by £3,000 in this case — common for services with low input VAT.

But for businesses with significant input VAT, standard scheme is usually better. Run both options through your accountant.

MTD VAT (Making Tax Digital)

Mandatory since April 2022 for all VAT-registered businesses (regardless of turnover).

Requirements:

• Digital records in HMRC-recognised software.
• Quarterly VAT returns filed via the software's API (not gov.uk web form).
• Digital links between data sources (no manual copy-paste between systems).

Common MTD VAT software:

• FreeAgent (free with NatWest business banking).
• Xero, QuickBooks, Sage — full accounting packages.
• Bridging software if you keep records in Excel.

Penalties for non-compliance: points-based system (similar to MTD ITSA — see our SA Part 7).

VAT return periods

Most businesses file quarterly. You can choose your VAT period to align with your accounting year:

• March/June/September/December stagger group.
• January/April/July/October stagger group.
• February/May/August/November stagger group.

Each return is due 1 month + 7 days after the period ends. So Q1 (Jan-Mar) is due by 7 May.

Annual Accounting Scheme is available for businesses with turnover under £1.35m — single annual return + monthly instalments through the year. Useful for cash-flow planning.

Deregistering for VAT

If your turnover drops below £88,000 (the deregistration threshold), you can voluntarily deregister:

1. Apply via gov.uk.
2. Notify customers your prices no longer include VAT.
3. Pay output VAT on capital items retained at deregistration if their value exceeds £6,000.
4. Cancel MTD software subscription if not needed for other purposes.

You can also be required to deregister if your business ceases trading entirely.

Common errors

1. Late registration — penalty of 5-15% of VAT owed since you should have registered, plus the back-VAT itself.
2. Charging VAT before registration — illegal; you must refund.
3. Reclaiming personal expenses — keep business/personal separate strictly.
4. Forgetting input VAT on imports — reclaim mechanism slightly different (now usually postponed VAT accounting).
5. Missing MTD quarterly deadlines — points + £200 penalties.

When to use the Cash Accounting Scheme

For businesses under £1.35m turnover, the Cash Accounting Scheme lets you account for VAT on the payment date rather than the invoice date. Useful when:

• Customers are slow payers.
• Cash flow is tight and you'd otherwise be paying VAT on unpaid invoices.

You still charge VAT normally; you just defer the HMRC payment until payment received. Eligible if you're up-to-date with VAT returns.

Try the numbers

For self-employed cash flow:

Sources

• HMRC: VAT registration
• HMRC: VAT rates on different goods and services
• HMRC: Flat Rate Scheme
• HMRC: Making Tax Digital for VAT
• gov.uk: Cancel your VAT registration