- What is input VAT?
- How does the input VAT offset work?
- What are the requirements for reclaiming input VAT?
- What are common input VAT claims?
- Purchases you can't claim input VAT on
- How to claim input VAT on your return
- Make input VAT recovery easier with Ramp
Input VAT is the Value Added Tax you pay on goods and services purchased for your business. Unlike output VAT, which you charge customers and owe to HMRC, input VAT is what you've already paid. In most cases, you can claim it back.
Knowing what qualifies for a claim and where HMRC draws the line directly affects your cash position.
What is input VAT?
Input VAT is the VAT charged to you when you buy goods or services for your business. Every time you purchase office supplies, pay for professional services, or import raw materials, the supplier adds VAT to the invoice.
The term "input" refers to purchases flowing into your business. "Output" VAT is the opposite: the VAT you charge on sales flowing out to your customers.
If you're VAT-registered with HMRC, you sit in the middle of the supply chain as a tax collector. You collect output VAT from your customers and pay input VAT to your suppliers. The difference between the two is what you settle with HMRC through your VAT return.
How does the input VAT offset work?
Each VAT period, you total the output VAT you've charged customers and subtract the input VAT you've paid on business purchases. The result is either a payment to HMRC or a refund back to you.
When you owe HMRC
If your output VAT is greater than your input VAT, you pay the difference. This is the standard position for most trading businesses with consistent sales.
Say you sell goods worth £10,000 at the standard 20% rate, collecting £2,000 in output VAT. During the same period, your business purchases total £4,000 plus £800 in input VAT. You'd owe HMRC £1,200, which is the £2,000 collected minus the £800 already paid to suppliers.
When HMRC owes you
If your input VAT exceeds your output VAT, you're in a credit position and HMRC refunds the difference. This commonly happens when you export goods at zero rate, make large capital purchases, or go through a seasonal dip where spending outpaces revenue.
If you regularly receive VAT refunds, you can apply for monthly returns instead of quarterly ones to speed up the cash-flow cycle. This is especially common for exporters whose sales are consistently zero-rated.
Input VAT vs output VAT
| Input VAT | Output VAT | |
|---|---|---|
| What it is | VAT you pay on purchases | VAT you charge on sales |
| Direction | Money going out to suppliers | Money coming in from customers |
| Your position | Asset to reclaim | Liability to remit to HMRC |
| Appears on | Purchase invoices you receive | Sales invoices you issue |
The tax moves through each stage of the supply chain until it reaches the end buyer, the person or business that consumes the product without reselling it.
What are the requirements for reclaiming input VAT?
You need to meet 4 conditions before you can deduct input VAT from your return. These come from the Value Added Tax Act 1994 and HMRC guidance.
The purchase must be for business use
You need to use the goods or services, or intend to use them, directly in your business operations. Personal purchases don't qualify. If something serves both personal and business purposes, such as a mobile phone you also use at weekends, you need to apportion the cost and claim only the business share.
You need a valid VAT invoice
HMRC requires proper documentation to support every claim. For most transactions, that means a full VAT invoice showing the supplier's name, address, VAT registration number, the date, a description of the goods or services, and the VAT amount. For imports, a C79 certificate from customs serves the same purpose.
Simplified invoices for purchases of £250 or less don't need to include the buyer's details, but they still require the supplier's VAT number and a breakdown of the total including VAT.
The expense must relate to taxable supplies
Your claim needs to connect to supplies that are taxable, whether at the standard rate (20%), the reduced rate (5%), or the zero rate (0%). If your business makes exempt supplies, such as certain financial or insurance services, you generally can't reclaim the input VAT on those expenses.
Partial exemption complicates your calculation. If you make both taxable and exempt supplies, you'll need an approved method to work out how much input VAT you can recover. HMRC's standard method uses the ratio of taxable to total income, but you can agree a special method with them if it produces a fairer result.
The item must not be blocked
Even if you meet the first three conditions, HMRC permanently blocks VAT recovery on some categories of spending. The two main examples are business entertainment costs, including client dinners and hospitality events, and the purchase of cars that aren't exclusively for business use. Vans and commercial vehicles follow different rules and can usually be claimed in full.
What are common input VAT claims?
Most of your everyday business spending carries reclaimable input VAT.
Stock and raw materials
If you buy goods to resell or raw materials to manufacture products, the VAT on those purchases is fully recoverable. This typically represents the largest share of your input VAT recovery.
Professional and advisory services
You can reclaim VAT on fees paid to solicitors, accountants, consultants, and other professional service providers, as long as the service relates to your taxable business activities.
Office costs and overheads
Office costs like commercial rent, utility bills, and software subscriptions carry input VAT you can recover.
Capital assets and equipment
You can recover VAT on larger purchases like machinery, IT equipment, office furniture, and commercial vehicles in full at the time of purchase. For high-value assets, recovering the VAT upfront improves your cash position before the asset has generated any revenue.
Imports and goods from overseas
When you import goods into the UK, you pay import VAT at the border or account for it under postponed VAT accounting. You can recover this input VAT on your next return, provided you have the right documentation.
For standard imports, that's a C79 certificate. If you use postponed accounting, your own VAT return entries and online monthly statements serve as evidence.
The VAT reverse charge works differently: for certain services from overseas suppliers, you account for VAT on both sides of the transaction without any cash changing hands.
Purchases you can't claim input VAT on
You can't recover VAT on some expenses, even when they relate directly to your business.
Business entertainment
If you take clients to dinner, buy event tickets for customers, or cover hospitality costs for anyone who isn't an employee, you can't claim the VAT. HMRC treats staff entertainment differently. You can reclaim VAT on genuine employee costs like a company away day or a training course, because those relate to your business operations rather than client relationships.
Cars for mixed use
You can't reclaim VAT on a car's purchase or lease if it's available for any private use, even occasionally. HMRC requires 100% business use with zero private journeys to allow the claim, and few cars meet that test in practice. Vans, lorries, and other commercial vehicles don't fall under this restriction, so if your business runs a fleet of delivery vehicles, the input VAT on those is fully recoverable.
Exempt and non-business activities
If your business makes VAT-exempt supplies, such as certain financial services, education, or healthcare, you can't reclaim the input VAT on costs tied to those exempt activities. If you make both taxable and exempt supplies, you'll need to run partial exemption calculations each period to determine what share of your input VAT you can recover.
How to claim input VAT on your return
Claiming input VAT is part of your regular VAT return process, not a separate application.
Keep valid documentation for every purchase
Hold onto every purchase invoice showing the VAT you've paid. HMRC can request these records at any time and disallow claims without valid supporting documentation. Under Making Tax Digital, most businesses now store these records digitally in compatible accounting software.
Complete your return accurately
On your VAT return, you'll enter your total output VAT in Box 1 and your total input VAT in Box 4. Your accounting software or HMRC's portal calculates the difference. If you owe HMRC, you'll make a payment by the deadline, and if HMRC owes you, you'll typically receive a repayment within 30 days of submitting.
Watch the four-year deadline
You can claim back input VAT up to 4 years after the due date of the return period when the VAT was incurred. If you miss a claim on a previous return, you can include it on a later one as long as you're within the 4-year window. Periodic reviews of your records can catch missed claims, especially after onboarding new accounting software or changing bookkeepers.
Get the timing right
You can only claim input VAT once you hold a valid VAT invoice and the supplier's tax point has occurred, not when you place the order or make the payment. If an invoice arrives after your return deadline, include it on your next return instead. HMRC may flag timing errors during compliance checks.
Make input VAT recovery easier with Ramp
Recovering input VAT depends on one thing your team controls: keeping a valid record for every qualifying purchase. That means capturing VAT invoices from suppliers, holding onto expense receipts, and coding each one correctly before your return is due.
Ramp is a spend management platform for UK businesses that brings expenses, accounts payable, and accounting sync into one workflow. Ramp provides:
- Receipt capture that pulls expense documentation at the point of spend, so your team isn’t reconstructing records at quarter-end
- Invoice ingestion that brings supplier invoices into Ramp’s AP workflow with coding, approval routing, and a full audit trail
- VAT coding that can be suggested on receipts and invoices for your team to review before approval
- Accounting sync that sends verified data to Xero or QuickBooks Online, keeping your records in one place for return preparation
Ramp makes coding VAT easy. Try Ramp's expense management software.
This article is for general informational purposes only and does not constitute tax, legal, accounting, or financial advice from Ramp. Tax rules may vary by jurisdiction and individual circumstances and may change. Consult a qualified tax professional about your specific situation before making tax decisions.
FAQs
Input VAT is the Value Added Tax you pay on goods and services purchased for your business. It's called "input" because these are purchases flowing into your operations. You can usually claim it back by deducting it from the output VAT you've collected when you file your VAT return.
Input VAT is what you pay to suppliers on purchases. Output VAT is what you charge your customers on sales. On each VAT return, you subtract your input VAT from your output VAT and either pay the difference to HMRC or receive a refund if your input VAT is higher.
In some cases, yes. HMRC allows you to reclaim input VAT on goods purchased up to 4 years before your registration date, provided you still held them at the time of registration. For services, the window is 6 months. The purchase still needs to meet the standard conditions, and you need to hold valid VAT invoices.
You need valid VAT invoices for every purchase you're claiming input VAT on. Each invoice must show the supplier's VAT number, a description of the goods or services, the date, and the VAT amount. For imports, you'll need a C79 certificate or evidence of postponed VAT accounting entries. Under Making Tax Digital, you must store these records digitally in compatible software.
HMRC can assess additional tax and charge interest from the date the original return was due. Penalties also apply, and their severity depends on whether the error was careless or deliberate.
If you discover the error yourself, you can correct it on your next return if the net error doesn't exceed £10,000, or falls between £10,000 and £50,000 and doesn't exceed 1% of your Box 6 figure. For larger corrections, you'll need to notify HMRC directly. Voluntary disclosure typically results in lower penalties than errors HMRC uncovers during an inspection.
