Most business owners I speak to treat bookkeeping as a job for the end of the quarter. It builds up, it gets rushed, and by the time it’s done nobody is confident the numbers are right.
It doesn’t have to work that way. Half an hour a week is genuinely enough for most small businesses — and the difference between weekly and quarterly isn’t really about time. It’s about whether you can remember what a transaction was for.
The Weekly Half Hour
Three things, in this order.
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Upload your receipts
Photograph them as you get them, or set aside ten minutes to clear the pile. A receipt you can’t find in six months is a cost you can’t claim — and without a valid VAT invoice, there’s no VAT reclaim to be had either.
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Match your bank transactions
Reconcile what’s come in and gone out against your invoices and bills. Do it weekly and it’s a handful of items you still remember. Do it quarterly and it’s several hundred, most of which have blurred into “something to do with the van, probably”.
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Chase anything unpaid
Look at what’s overdue and send a polite nudge. This is the part everyone skips, and it’s the part that pays for the other two.
Do that consistently and your books stay ready — for VAT returns, for loan and mortgage applications, and for the simple matter of knowing where you stand on any given day rather than three months after the fact.
The Bit Nobody Sees: Coding
Here’s what an accountant means by coding — deciding which category each transaction belongs to, and what VAT treatment applies to it. It is invisible when it’s right and expensive when it’s wrong.
Software will record whatever you tell it. It won’t query a VAT rate that doesn’t match the invoice sitting in front of you, and it won’t flag a default that’s been quietly applied a hundred times over.
A recent case. We took on a client earlier this year and, as we always do, reviewed the previous bookkeeper’s work before picking things up. A run of purchases had been coded as Nil VAT — meaning no VAT was reclaimed on them at all. The supplier invoices clearly showed VAT charged. Whoever entered them had simply accepted the default rate rather than checking the paperwork.
Left alone, that was roughly £500 of recoverable VAT the business would never have seen. Nothing dramatic, no bad intent — just a default nobody questioned, repeated across enough transactions to add up to real money. We picked it up in the review, corrected the treatment, and the business recovered what it was owed.
The wider point is that this cuts both ways. Under-claiming costs you cash. Over-claiming leaves you with an error to correct and, potentially, a penalty. There is a four-year window to put most errors right — for input tax you failed to claim, like the case above, it runs from the due date of the return concerned. Below certain thresholds you can adjust the return for the period in which you spot the error rather than notify HMRC separately, but those thresholds matter, so it’s worth a conversation before you act.
Three Areas That Catch People Out
In our experience these three come up more than anything else. None are obscure — they’re simply the judgement calls that get skipped when the books are being caught up in a hurry at quarter-end.
Car leases
Lease a car that’s available for private use and you can normally recover only 50% of the VAT on the lease charges. That block exists to cover the private element, and it’s the default position for most ordinary company cars.
There are exceptions — cars intended to be used primarily for taxi work, self-drive hire or driving instruction, and short hires of ten days or less for a specific business purpose, though not where the hire is simply replacing an off-the-road company car. Maintenance can sit outside the block too, but only where it’s genuinely optional and separately identified in both the agreement and on the invoice. A separate line on the bill isn’t enough on its own.
What we see most often is the full 100% being claimed by default. That’s an error waiting to be found.
Entertainment
VAT on entertaining UK clients and contacts is blocked and can’t be recovered. Staff entertainment is different: VAT on staff parties, team days and similar is generally recoverable — although entertainment provided only to directors or partners is blocked, which catches a lot of one-director companies.
Where an event has a mix of employees and guests, you can only recover the employee proportion. Entertaining overseas customers sits outside the block as well, though an output tax charge often cancels the benefit out in practice.
So the same restaurant bill can be treated several different ways depending on who was around the table. Which is exactly why “entertainment” as a single catch-all category goes wrong so reliably.
Personal and mixed expenses
The phone that’s mostly personal. The laptop the family uses. The fuel that covers the school run. These need apportioning between business and private use, and only the business share is claimable.
The problem is rarely deliberate. A card payment lands in the bank feed, gets coded to the nearest-looking category, and nobody flags that half of it was personal. Weekly, you’d catch it. Quarterly, you won’t remember.
| Cost | Usual VAT position | The common slip |
|---|---|---|
| Leased car, private use available | 50% recoverable | Claiming the full 100% by default |
| Client entertaining (UK) | Blocked | Lumped in with staff costs and claimed in full |
| Staff entertaining | Generally recoverable | Directors-only events, which are blocked |
| Mixed business and private use | Business proportion only | Phone, broadband and fuel claimed at 100% |
| Purchase with VAT charged | Recoverable with a valid VAT invoice | Coded as Nil VAT and never reclaimed at all |
If you want the fuller picture on what can and can’t be reclaimed, we’ve covered it in more detail in VAT reclaim mistakes: what you can’t claim back.
What Good Looks Like
You should be able to open your accounts on any given day and trust what you see. If you can’t — if there’s a nagging sense that the VAT return is closer to an estimate than a calculation — that’s usually a bookkeeping problem rather than an accounting one. Which is good news, because it’s the more fixable of the two.
Half an hour a week gets most businesses there.
Rather hand it over completely?
Bookkeeping is one of our core services. We keep small business books ready all year round, so there’s no quarter-end scramble and no guessing. Here’s what that looks like:
- Full bookkeeping — receipts processed and transactions coded as they go in, not patched up later
- Bank reconciliation — kept current, so your figures mean something on any given day
- VAT returns — reviewed properly before submission rather than defaulted through
- A look back — a review of recent returns for exactly the coding errors above
- Credit control support — help keeping on top of what’s owed to you
This post is intended as general guidance only. VAT treatment depends on the facts of each case — always seek specific advice tailored to your own circumstances and refer to the latest HMRC guidance.
