VAT for Contractors — When to Register, Which Scheme and How It Works

Do you need to register for VAT?

The VAT registration threshold for 2026/27 is £90,000. Note this is taxable turnover, not profit — it is your gross billings before any expenses are deducted. For a contractor billing £450/day and working 48 weeks, that is £108,000 — well above the threshold and mandatory registration applies.

The rolling 12-month test

HMRC does not wait for your year end. At any point in time, if your taxable turnover over the previous 12 months exceeds £90,000, you must register. This means you need to monitor your cumulative billing continuously, not just at year end. Your contractor accountant tracks this through Xero and alerts you when you approach the threshold.

Voluntary VAT registration — when it helps and when it hurts

When voluntary registration makes sense

• B2B clients only — agencies and corporate clients are almost always VAT-registered. The VAT you charge is neutral to them (they reclaim it), but you can reclaim VAT on your expenses. This is the situation for most IT contractors and consultants
• Significant capital purchases — if you are buying expensive equipment (£2,000+ laptop, monitors, servers), voluntary registration lets you reclaim 20% VAT on those purchases
• Professional credibility — some clients and agencies prefer working with VAT-registered companies. It signals a genuine, established business
• Approaching the threshold — if you are billing £70,000+ and likely to breach £90,000 within a year, registering early avoids the rushed mandatory registration and ensures clean records from the start

When voluntary registration does not make sense

• B2C clients — if you invoice individuals or non-VAT-registered businesses, your prices effectively increase by 20%. Clients cannot reclaim the VAT, so it is a real cost increase to them
• Low expenses — if your reclaimable VAT on expenses is minimal (e.g. you work from home with few equipment purchases), the admin cost of quarterly VAT returns may outweigh the benefit
• Flat-rate scheme no longer advantageous — since the “limited cost trader” rules (see below), the flat rate scheme is less profitable for contractors with low material costs

Should you register for VAT?

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Standard rate vs flat rate scheme

Once registered, you choose how to account for VAT. The two main options for contractors:

The limited cost trader trap

How VAT works in practice for contractors

Invoicing

Once registered, every invoice must include your VAT registration number, the VAT amount as a separate line, the applicable VAT rate (20% standard), and the gross total. For a £5,000 net invoice, you add £1,000 VAT for a £6,000 total. The client pays £6,000 to your company.

VAT returns

You file a VAT return quarterly. Each return covers a three-month period (your “VAT quarter”), and the return plus payment are due one month and seven days after the quarter end. Under Making Tax Digital for VAT (mandatory for all VAT-registered businesses since April 2022), you must file via MTD-compatible software — Xero handles this directly.

VAT and the agency chain

Most contractors invoice through an agency. The VAT chain works like this: you invoice the agency £5,000 + £1,000 VAT. The agency invoices the end client at their margin + VAT. Each party reclaims the input VAT from the party below them. The end client bears the final VAT cost (or reclaims it if they are VAT-registered, which corporate clients always are). The agency is neutral — they collect VAT from the client and pass your portion to you.

If you work directly with the end client (no agency), the same principle applies: you charge VAT, the client reclaims it. The net cost to a VAT-registered client of your services is the same whether you are VAT-registered or not.

Reclaiming VAT on expenses

Under the standard rate scheme, you reclaim VAT on any business expense that includes VAT. Common reclaimable items for contractors:

You need a valid VAT invoice (not just a receipt) to reclaim input VAT. Missing or invalid VAT invoices are the most common reason HMRC disallows VAT reclaims. For the full list of deductible contractor expenses, see our contractor expenses guide.

Common VAT mistakes contractors make

1. Late registration — not monitoring the rolling 12-month threshold and breaching £90,000 without registering. HMRC charges the full VAT that should have been collected plus a penalty of 5–15%
2. Choosing the wrong scheme — joining the flat rate scheme without checking the limited cost trader rules. Many contractors end up on 16.5% when standard rate would be cheaper
3. Reclaiming VAT on FRS — you cannot reclaim input VAT on the flat rate scheme (except capital goods over £2,000 inc. VAT). Contractors who switch from standard to FRS and continue reclaiming create errors that HMRC catches at inspection
4. Filing late — VAT returns are due one month and seven days after the quarter end. Late filing triggers a surcharge starting at 2% of VAT due, rising to 15% for repeat offences within 12 months
5. Not issuing proper VAT invoices — invoices must include your VAT number, VAT amount, rate and gross total. Missing elements mean your client cannot reclaim the VAT, which creates friction and can delay payment
6. Forgetting to deregister — if your turnover drops below £88,000 (the deregistration threshold for 2026/27) and you expect it to stay below, you can apply to deregister. Staying registered unnecessarily adds admin cost. Conversely, if your income fluctuates, deregistering and re-registering creates disruption — discuss with your accountant
7. Ignoring the reverse charge — for services purchased from overseas suppliers (common for cloud software from US companies), you may need to account for VAT under the reverse charge mechanism. Your accountant ensures this is handled correctly in Xero

Making Tax Digital for VAT

If you are already using Xero for your bookkeeping (which all AccTek clients do), you are automatically MTD-compliant for VAT. There is no additional software or process needed. Your accountant reviews each VAT return before submission to catch any errors or missed reclaims.

For the broader MTD landscape including income tax, see our MTD knowledge hub and our MTD guide for freelancers.

How AccTek handles your VAT

ICAEW-regulated and led by Godwin Pinto ACA, AccTek manages your VAT end-to-end as part of your monthly package:

• Threshold monitoring — we track your rolling 12-month turnover in Xero and alert you before you breach the £90,000 threshold
• Scheme selection — we model standard rate vs flat rate with your actual expense profile before you register, so you are on the right scheme from day one
• VAT registration — we handle the registration at HMRC, set up VAT in Xero, and configure your invoice templates to include the correct VAT details
• Quarterly VAT returns — we prepare, review and file your MTD-compatible VAT return before every deadline. You approve the return; we submit it
• Expense VAT capture — we ensure every reclaimable expense has a valid VAT invoice attached, and we flag any blocked items before they reach the return
• Annual VAT review — we check whether your current scheme is still optimal, and whether deregistration or a scheme switch would save you money

Whether you are an IT contractor approaching the threshold, a freelancer considering voluntary registration, or setting up your first company, VAT is included in every AccTek package from £19.99/month.

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VAT for contractors — frequently asked questions

Should I register for VAT if I am below the threshold?

If your clients are VAT-registered businesses (agencies, corporate clients), voluntary registration is usually beneficial — clients reclaim the VAT you charge, so your price is neutral to them, and you reclaim VAT on your expenses. If your clients are individuals or non-VAT-registered businesses, registration makes you 20% more expensive to them.

What is the VAT registration threshold for 2026/27?

The mandatory registration threshold is £90,000 of taxable turnover in any rolling 12-month period. The deregistration threshold is £88,000. Both refer to turnover (gross billings), not profit.

Is the flat rate scheme worth it for contractors?

It depends on your expenses. If you qualify for the sector rate (e.g. 14.5% for IT consultancy) rather than the 16.5% limited cost trader rate, the FRS can save £1,000–£2,000 per year. But if your goods costs are below 2% of turnover (true for most IT contractors), you default to 16.5% and the saving shrinks dramatically. Your accountant models both schemes before you decide.

How often do I file a VAT return?

Quarterly. Each return covers a three-month VAT period and is due one month and seven days after the quarter ends. Under MTD for VAT, you file directly from Xero or other MTD-compatible software.

Can I reclaim VAT on expenses I incurred before registering?

Yes, within limits. You can reclaim VAT on goods purchased up to four years before registration (provided you still have them and they were for business use) and on services purchased up to six months before registration. This can be valuable if you bought expensive equipment before registering.

What happens if I deregister for VAT?

On deregistration, you must account for VAT on any stock and capital assets you hold that you previously reclaimed VAT on. If the total VAT on these assets is below £1,000, HMRC waives this. You stop charging VAT on invoices from the deregistration date. Apply at gov.uk/vat-registration/cancel-registration.

Does VAT affect my IR35 position?

Not directly. VAT registration and IR35 status are separate assessments. However, being VAT-registered can support your case as a genuine business (one of many factors tribunals consider). It is not a determining factor on its own. See our IR35 guide for the factors that actually matter.