Expense Claiming Mistakes Associate Dentists Make

Claiming expenses is not complicated, but a handful of recurring mistakes either cost associates money or create problems if HMRC ever asks questions. Most are easy to avoid once you know to look for them. This is general information, not tax advice.

Assuming everything is allowable

The test is whether a cost was incurred wholly and exclusively for the business. Some costs are clearly business, some are clearly personal, and many sit in between and need apportioning. Treating everything you spent as fully claimable is a risk, because a claim that does not meet the test can be challenged, with additional tax and potentially penalties to follow. The fix is to apply the wholly-and-exclusively test honestly to each item and apportion mixed-use costs sensibly.

Missing receipts and proof

A claim without evidence is hard to support. Every cost ideally has a date, supplier, amount, and a receipt or record. Digital billing confirmations count, so there is no excuse for losing the recurring ones. The associates who get caught out are usually those reconstructing the year from memory, who cannot evidence costs they genuinely incurred and so either lose the claim or claim without backup.

Forgetting the small recurring costs

Subscriptions, software, professional memberships, and small tools add up across a year and are the easiest things to overlook. They are often perfectly allowable but never get claimed because nobody tracked them. A £50-a-month subscription is £600 a year of allowable cost; miss several of these and you are paying tax on income you did not need to.

Mixing personal and business spending

Running everything through one account makes the year far harder to reconcile and raises the chance of missing legitimate claims or accidentally claiming personal items. A separate business account or card is not a legal requirement for a sole trader, but it makes clean record-keeping much simpler.

Leaving it all to year end

Capturing costs through the year, rather than reconstructing them in a panic before the deadline, produces a cleaner and more complete pack. The year-end scramble is where claims get missed and evidence goes astray. A light ongoing habit beats a heavy annual one.

A worked example

An associate spends the year without tracking anything carefully. At filing time she remembers her indemnity and GDC fee, because those are obvious, but forgets her software subscriptions, some CPD, and the mileage between her two practices. She also cannot find receipts for a couple of equipment purchases. The result is that she claims less than she was entitled to and pays more tax than she needed to, purely through poor record-keeping. An associate with the same costs but a simple capture habit claims the lot, with evidence, and keeps more of her income legitimately.

Frequently asked questions

What is the single most common expense mistake?

Poor record-keeping leading to missed allowable costs. The money is left on the table simply because the costs were never tracked or evidenced.

Do I need a separate business bank account?

Not legally as a sole trader, but it makes reconciling your year and evidencing claims considerably easier.

What happens if I claim something that turns out not to be allowable?

HMRC can disallow it, leaving additional tax due and potentially penalties, which is why the wholly-and-exclusively test and good evidence matter.

Can I claim a cost without a receipt?

It is much weaker without evidence. Keep records for everything, including digital confirmations for recurring subscriptions.

This is general information, not tax advice. Check anything uncertain with your accountant or HMRC.