VAT or Value Added Tax is one of the most predictable bills a UK business will ever face, and one of the easiest to get wrong if you're new to running a VAT-registered company. This guide explains what VAT is, when you need to register, how the bill is calculated, how to pay it, what's exempt, and what to do if cash flow gets tight in the run-up to a deadline. The rules don't change often, but the deadlines come round every quarter.
VAT is a consumption tax charged on most goods and services sold in the UK. It's added to the price the customer pays, collected by the business making the sale, and passed on to HMRC. The standard rate is currently 20%, but reduced rates and exemptions apply to certain categories - domestic fuel, children's clothing, most food, and a handful of others. Because the consumer ultimately pays, VAT doesn't appear in your profit and loss account as an expense; you're collecting it on HMRC's behalf rather than spending it.
VAT applies to the value added at each stage of a product’s journey to the end consumer. A manufacturer pays VAT on raw materials, charges VAT when they sell to a wholesaler, and reclaims the VAT they paid on the materials. The wholesaler does the same. By the time the product reaches the consumer, VAT has been charged and reclaimed at every step - but only the consumer, who can’t reclaim, actually bears the cost.
For a registered business, the practical effect is simpler than that sounds: at the end of every accounting period, you compare the VAT you’ve charged customers (output tax) with the VAT you’ve paid suppliers (input tax). If you’ve charged more than you’ve paid, you owe HMRC the difference. If you’ve paid more than you’ve charged, HMRC owes you a refund.
Most goods and services in the UK sit at the standard rate of 20%. A 5% reduced rate applies to a narrower set of items, including domestic energy, children’s car seats, and home insulation. A 0% rate applies to most food, books, children’s clothing, and public transport - these are technically taxable, but at zero, so businesses still record them on their return and can reclaim related input tax. A small group of services sit outside the system entirely as VAT-exempt, which behave differently.
Input tax is the VAT you pay on goods and services you buy for your business like office supplies, stock, professional fees, and equipment. Output tax is the VAT you charge on what you sell. Your VAT return is essentially a tally of the two. The difference becomes either a payment to HMRC or a refund to you.
You must register for VAT once your business’s taxable turnover crosses HMRC’s registration threshold over a rolling 12-month period. You also have to register if you expect to exceed the threshold in the next 30 days alone, even if your prior 12 months were below it. Registration must happen within 30 days of crossing or expecting to cross the line. The current threshold is published on gov.uk and reviewed periodically, always check the latest figure before making the call.
You can register voluntarily before hitting the threshold. Doing so lets you reclaim input VAT on business purchases, which is useful if you’re spending heavily on stock or equipment and most of your customers are themselves VAT-registered (so charging VAT doesn’t make you more expensive in their eyes). The trade-off is the administrative overhead of quarterly returns and Making Tax Digital compliance.
If you operate as a limited company, the company itself registers and holds the VAT number. If you’re a sole trader, you register personally — the VAT number is tied to you, not to a trading name, and it follows you across any sole-trader businesses you run.
Once you're VAT registered, your business has eight core jobs:
You can hand all of this to an accountant or tax agent, but the legal responsibility stays with the business - if something's wrong or late, HMRC comes to you, not them.
Your VAT bill is the difference between two numbers:
Output tax (the VAT you charged customers) − Input tax (the VAT you paid suppliers) = What you owe HMRC
A quick example: if you charged £25,000 in VAT this quarter and paid £10,000, you owe HMRC £15,000. Flip those numbers — £10,000 charged, £25,000 paid — and HMRC owes you the £15,000 instead.
HMRC usually refunds within 30 days of getting your return. If the refund is late, you may be owed a "repayment supplement" of £50 or 5% of the refund (whichever is higher) - unless HMRC is still waiting on earlier returns from you.
HMRC accepts several payment methods, and the time it takes to clear varies depending on the route.
Faster Payments (online or telephone banking), CHAPS, or online bank transfer through HMRC’s portal all settle within one working day. These are the safest options if your deadline is imminent.
Bacs, Direct Debit, standing order, or in-person payments at your bank or building society take around three working days to reach HMRC. Build that lead time into your diary if you’re using any of these methods.
A direct debit is the most reliable way to ensure HMRC is always paid on time. Once set up, HMRC automatically collects the VAT due after you submit your return — you just need to make sure the return itself is in on time. Many businesses use direct debit precisely to take the manual scheduling burden away.
VAT returns are typically due quarterly, and payment must reach HMRC by one calendar month and seven days after the end of the accounting period. The exact deadline depends on your VAT cycle — you’ll find it on your VAT return or via the gov.uk payment deadline calculator.
Missing the deadline triggers HMRC’s late-payment penalty regime: penalties as a percentage of unpaid VAT once you’ve passed a set number of days, daily interest on the outstanding amount, and escalating penalty points under HMRC’s points-based system. Repeated late payments can also damage your business credit file, making future borrowing harder and more expensive long after the original bill is settled.
If a deadline is approaching and cash flow doesn’t quite cover the bill, a VAT loan can settle HMRC on your behalf and spread the cost into fixed monthly repayments — see how VAT loans work →
Payments on account are advance instalments toward your VAT liability, required of UK VAT-registered businesses whose total VAT liability exceeds £2.3 million over twelve months. The payments are made in two instalments during a quarterly accounting period, with a final balancing payment after the return is filed. They must be paid electronically and must reach HMRC by the end of the due date.
If the standard quarterly cycle doesn’t suit your business, for example, if you’re consistently in a refund position and want HMRC’s money back sooner you can switch to monthly returns via the gov.uk form. Monthly filers using electronic payment may receive an additional seven days to pay, though that extension lapses if you switch back to quarterly.
As an alternative to payments on account, eligible businesses can pay their actual prior-month VAT liability instead of estimated instalments. If your turnover varies significantly month to month, this approach avoids the cash-flow whiplash of fixed payments. The commitment is annual, so once you choose this method, you must continue for a full year.
VAT-registered businesses can reclaim the VAT they pay on most goods and services purchased for business use. Eligible categories include office supplies, computer equipment, professional services and travel and accommodation when used solely for business. As well as, fuel and vehicle expenses (proportionate to business use), and stock or raw materials.
Construction projects can sometimes qualify for a VAT refund even outside normal registration -building a new home, converting a property, building a non-profit residence such as a hospice, or building a property for charity can all attract relief schemes worth investigating.
A handful of goods and services are exempt from VAT, meaning the business selling them doesn’t charge VAT and can’t reclaim input VAT on related purchases. The main exempt categories are insurance, finance, and credit (this is why VAT isn’t charged on loan interest); education and training delivered by an eligible body; health services provided by registered professionals; charity fundraising events; membership subscriptions to non-profit organisations; and the selling, leasing, or letting of commercial land and buildings, with some specific exceptions.
Exempt is not the same as zero-rated. Zero-rated goods are still taxable, just at 0%, so businesses can reclaim related input VAT. Exempt goods sit outside the VAT system entirely, and businesses that mainly sell exempt items often can’t recover their own input VAT either.
VAT and corporation tax are both UK business taxes, but they tax different things. VAT is a consumption tax charged on the goods and services your business sells, collected on HMRC’s behalf, and passed on. Corporation tax is a tax on profits, charged on what your limited company earns after allowable expenses. You can owe one without owing the other; a loss-making but VAT-registered business still owes VAT on its sales. The bills also land on different schedules: VAT quarterly, corporation tax annually.
If cash flow makes paying either bill on time difficult, dedicated tax finance products exist for both - VAT loans for VAT bills and corporation tax loans for the corporation tax equivalent.
HMRC’s first preference is that you contact them before the deadline - they offer Time to Pay arrangements that can spread the bill if you can demonstrate temporary financial difficulty. If the cash flow gap is short-term and tied to the timing of your VAT quarter rather than a fundamental business problem, a VAT loan is often the cleaner route. The lender settles HMRC directly on your behalf, and you repay the loan in fixed monthly instalments. You avoid HMRC’s late-payment charges entirely, you protect your business credit file, and your working capital stays in the business for what you need it for.
Learn more about VAT loans with Lovey →
VAT isn’t going anywhere. The threshold may move, the digital filing rules will keep evolving, and the deadlines will keep arriving every quarter, but the fundamentals remain : register when you cross the threshold, file on time, pay on time, and reclaim what you’re entitled to. The businesses that get into trouble are almost always the ones that get caught short on cash when a bill lands, not the ones that misunderstood the rules. If that ever sounds like your business, a VAT loan exists specifically for that problem - settle with HMRC on time, spread the cost into monthly repayments, and keep growing.
