The weird, the wonderful and the genuinely useful: what contractors get wrong about expenses

Every accountant has stories. Darryl Keyte, director and co-founder of The Accounting Crew, has more than most, and when I asked him to run through his five strangest expense claims, he didn't need long to think.

But here's the thing that actually matters for anyone running a limited company: none of those claims were automatically doomed, and some of the expenses contractors assume are far too personal to claim are completely legitimate. The gap between what people think they can claim and what they're actually entitled to is bigger, and stranger, than most contractors realise.

Why the strange claims aren't automatically wrong

Every expense, however odd it looks on a bank statement, comes down to the same test: was it wholly and exclusively for the purposes of the business? That's the only question that matters, which is why a camel ride could theoretically be allowable and a suit for client meetings almost never is.

After telling me about the bizarre expense claims he's come across, Darryl explains that "every one of these expenses could potentially be allowable if it was genuinely incurred for the purposes of the trade. What made these particular examples memorable was that they seemed completely out of sync with the businesses involved." A jewellery claim is the classic version of this: technically defensible in theory, hard to justify in practice, because you don't need a £5,000 watch to work on a spreadsheet.

The lesson isn't "try your luck." It's more that if something feels like a stretch, check before you claim it rather than after. A quick conversation with an accountant is a lot less painful than a challenge from HMRC eighteen months down the line.

The legitimate expenses that sound too personal to be real

The more useful story here runs in the other direction. Plenty of contractors assume anything that feels remotely personal must be off limits, and end up leaving genuine tax reliefs unclaimed for years.

The trivial benefits exemption is the best example. A limited company can give its director small gifts, gift vouchers being the obvious one, worth up to £50 each, up to six times a year for directors of close companies. That's a potential £300 annually that plenty of contractors never touch, because an Amazon voucher paid for by the company sounds like exactly the sort of thing HMRC would reject. It isn't.

The annual events exemption works the same way. A company can cover staff functions up to £150 per head each tax year, and for a one-person limited company, that allowance can cover a nice meal, a theatre trip, a spa break, even an overnight stay. New clients are often convinced this can't possibly be legitimate, purely because it feels too personal to be a business cost. But it is legitimate, and it's one of the more pleasant surprises in an otherwise unforgiving area of tax.

Does your trade change what you can claim?

The underlying rule never moves, but what it looks like in practice varies hugely by industry. "While the underlying rule is always the same, an expense must be incurred wholly and exclusively for the purposes of the business, what qualifies can vary significantly between industries," Darryl says. A construction contractor might reasonably claim tools, safety equipment, certifications and trade memberships that a tech contractor would never need. A tech contractor, in turn, might have significant software subscriptions, cloud costs and specialist hardware that would look completely out of place on a construction site.

HMRC doesn't decide allowability based on your sector, though. As Darryl puts it, "a professional athlete, helicopter pilot, engineer and accountant will all have very different spending patterns, but the same underlying tax principles apply to all of them." The skill isn't knowing the rule, it's applying it to your own trade rather than someone else's checklist. "The challenge for us as accountants is helping clients understand those nuances and ensuring they claim everything they are entitled to, while avoiding claims that don't stand up to scrutiny," he says.

Your expenses should evolve as your business does, but most people's don't

Here's where a lot of contractors quietly lose money. "The expenses a contractor should be thinking about often change as their business matures," Darryl says. In year one, spending is usually basic: a laptop, software, a share of the home office. As the business grows, training, insurance and networking costs tend to creep in. Once profits start to build, the picture should shift again, this time toward pension contributions, trivial benefits and annual event allowances, three of the most commonly overlooked reliefs available to limited company directors, and areas Darryl says "many people overlook."

The mistake Darryl sees most often isn't a bad claim. It's a stale one. "Contractors get into a routine and claim exactly the same things year after year. Home office claims are a classic example. Costs change, circumstances change and opportunities change, but the claims often stay the same." A simple annual habit, sitting down once a year and asking whether you're still claiming everything you're entitled to, is often where the biggest savings turn up.

The small stuff adds up more than the big stuff

If there's one thing worth taking away from all of this, it's not about the camel ride. It's that the £10 and £20 costs contractors don't bother logging are usually worth more over time than the big purchases they agonise over. Good record-keeping from day one, not perfect record-keeping, just consistent record-keeping, is what actually protects a contractor's tax position.

The flip side is worth being just as clear about. Overclaiming tends to feel harmless right up until HMRC actually looks, and by then the maths has usually flipped. "We've seen contractors become overly aggressive with expense claims because everything appears fine at first," Darryl says. "The problem is that if HMRC later challenges those claims, the tax, interest and penalties can quickly outweigh any short-term benefit."

His advice, in the end, is deliberately unglamorous, and it's as good a summary of the whole piece as any: "Be reasonable, be thorough and keep good records. Claim everything you're entitled to, but nothing you can't justify."

For a fuller breakdown of what counts as an allowable expense, The Accounting Crew's Allowable Business Expenses Guide is worth a look.