VAT can feel like one of those business tasks that only matters when a return is due. You collect VAT on your sales, reclaim VAT on eligible purchases, submit the return, and move on. However, if HMRC decides to check your VAT records, the quality of your bookkeeping suddenly becomes very important.
Poor VAT records can create stress, delays, penalties and unexpected tax bills. They can also make it harder to prove that your VAT returns were correct. If you run a growing business, this is not something to leave until HMRC contacts you.
The UK VAT registration threshold is currently £90,000 in taxable turnover over a rolling 12-month period. You must also register if you expect your taxable turnover to go over £90,000 in the next 30 days. Once you are VAT registered, you must keep proper records and charge the correct VAT where required.
That is where good bookkeeping matters. With support from Asmat Accountants, you can keep VAT records organised, reduce errors and feel more prepared if HMRC asks to review your business.
What happens during an HMRC VAT check?
HMRC can inspect your VAT records through what is known as a compliance check. VAT officers can visit your business to check whether you are paying and reclaiming the right amount of VAT. HMRC usually gives 7 days’ notice and explains what information it wants to see, although it can also visit without an appointment in some cases.
During a VAT check, HMRC may look at your sales invoices, purchase invoices, bank records, VAT account, till records, credit notes, export evidence, import records, digital bookkeeping software and any adjustments made on your VAT return.
If your records are clear, the process is usually easier to manage. If your records are incomplete, inconsistent or difficult to follow, HMRC may ask more questions, take longer to review your business and look more closely at previous returns.
Missing invoices can make VAT claims difficult to prove
One of the most common problems is missing purchase invoices. If you reclaim input VAT on business costs, you need evidence to support the claim. A bank payment on its own may not be enough because it does not always show the VAT amount, supplier details or whether the purchase was VATable.
For example, if you reclaim £2,000 of VAT on equipment, software or materials, you should be able to show the proper invoice. If the invoice is missing, HMRC may challenge the claim. That can lead to additional VAT being payable, plus possible interest or penalties depending on the circumstances.
This is why you should store invoices as soon as you receive them. Digital bookkeeping software can help because you can upload receipts, match them to bank transactions and keep everything in one place.
Sales records must match your VAT returns
Your sales records should support the VAT you declare. If your VAT return says you made £60,000 of VATable sales in a quarter, HMRC may want to see how that figure was built.
Problems can arise when sales are recorded in different places, such as card payment systems, cash records, online marketplaces, bank deposits and manual invoices. If these records do not match, HMRC may question whether sales have been missed.
This can be especially important if you deal with cash, retail sales, hospitality, construction, online trading or multiple payment platforms. The more income streams you have, the more important it is to reconcile them properly.
A simple monthly review can help you check that your sales invoices, bank receipts and VAT figures all line up before the return is submitted.
Incorrect VAT rates can lead to underpayments or overclaims
The standard UK VAT rate is 20%, while some goods and services are charged at 5% or 0%, and some are exempt or outside the scope of VAT.
Poor records can make it hard to prove why a particular VAT rate was used. For example, you may have mixed standard-rated and zero-rated sales, or you may work in an industry where VAT treatment depends on the type of customer, product or service.
If the wrong rate has been charged, you may have underpaid VAT to HMRC or overcharged your customers. Both can create problems. Underpayments may need to be corrected, while overcharging can cause customer complaints and accounting issues.
You should make sure your invoices clearly show the VAT rate, net amount, VAT amount and gross total. This helps HMRC understand the figures and helps you avoid confusion later.
Bad records make VAT adjustments harder to explain
VAT returns sometimes include adjustments. These may relate to bad debt relief, partial exemption, fuel scale charges, reverse charge transactions, import VAT, corrections from earlier periods or credit notes.
Adjustments are not automatically a problem, but they need to be explained. If you cannot show how an adjustment was calculated, HMRC may challenge it.
For example, if you reduce your VAT due because a customer has not paid, you need to make sure the bad debt relief rules have been followed and the records support the claim. If your bookkeeping is unclear, it becomes harder to show that the adjustment is valid.
A good habit is to keep a short note with any VAT adjustment. This should explain what the adjustment relates to, how the amount was calculated and which invoices or transactions support it.
Digital record keeping is now part of VAT compliance
All VAT-registered businesses should now be within Making Tax Digital for VAT unless exempt. HMRC says VAT records should be kept and VAT returns submitted using compatible software.
This means relying only on paper records or disconnected spreadsheets can create problems. You need a system that keeps the right digital records and allows the VAT return to be submitted correctly.
Digital record keeping is not just about compliance. It can also reduce mistakes. When bank feeds, sales invoices, purchase invoices and VAT categories are kept in one system, it is easier to review the figures before submission.
However, software only works well if it is used correctly. If transactions are coded to the wrong VAT rate or uploaded without proper checks, errors can still happen.
Late or incorrect returns can lead to penalties
Poor VAT records often lead to late submissions because the information is not ready on time. For VAT accounting periods starting on or after 1 January 2023, HMRC uses a penalty points system for late VAT returns. When you reach the relevant points threshold, you receive a £200 penalty, with further £200 penalties for later missed submissions while at the threshold.
This can be frustrating because the penalty may be avoidable. If your records are updated regularly, the return can usually be reviewed and submitted before the deadline.
Late filing is not the only issue. If poor records lead to incorrect VAT returns, HMRC may ask you to correct them. Depending on the size and nature of the error, this can affect cash flow and may create further questions from HMRC.
Poor VAT records can affect your cash flow
VAT is not your money to spend. If you collect £20,000 plus 20% VAT from customers, the extra £4,000 needs to be accounted for. You may be able to reclaim VAT on purchases, but you still need to know what the final amount due to HMRC is likely to be.
When records are poor, you may not know how much VAT you owe until the return is prepared. That can leave you with a sudden bill and not enough cash set aside.
Better VAT records give you more warning. You can see whether your next VAT payment may be £3,000, £8,000 or £15,000 and plan accordingly. This helps you avoid using VAT money for day-to-day costs and then struggling when HMRC payment is due.
How to improve your VAT records before HMRC checks
You do not need to wait until HMRC contacts you. Good habits throughout the year can make VAT checks easier and reduce the risk of errors.
Start by keeping all sales and purchase invoices in one system. Reconcile your bank account regularly, check VAT codes before submitting returns and review any unusual transactions. If you use cash, card terminals or online platforms, make sure each source is recorded properly.
You should also keep VAT records for at least 6 years in most cases. HMRC guidance says VAT-registered businesses must generally keep business records for VAT purposes for at least 6 years.
It also helps to review your VAT position before the deadline, not on the final day. This gives you time to find missing invoices, question unusual figures and correct mistakes before the return is submitted.
Final thoughts
Poor VAT records can turn a simple HMRC check into a stressful and time-consuming process. Missing invoices, incorrect VAT rates, unexplained adjustments, weak digital records and late submissions can all create problems.
Good VAT records give you more control. They help you support your VAT claims, submit more accurate returns, plan for payments and respond confidently if HMRC asks questions.
If your VAT records are not as clear as they should be, now is the right time to fix them. Contact the team today for practical support with VAT bookkeeping, VAT returns and HMRC-ready record keeping.
