03/09/2026
"What can I actually put through the business?"
Probably the question I'm asked most often, and usually a bit sheepishly — as though there's a secret list somebody forgot to hand over.
There isn't. The test is whether the cost is wholly and exclusively for the trade. That's the whole rule.
What's more interesting is the pattern in what people get wrong.
Things people assume they can't claim through their company, and can: use of home when you genuinely work from home, professional subscriptions, the staff Christmas party (up to £150 a head, completely tax-free, not just deductible), eye tests and glasses needed for screen use.
Things people do claim, and shouldn't: clothing that isn't a uniform, parking fines and speeding tickets — even when they happen on a genuine business trip.
The second list is the expensive one, because it survives right up until somebody looks.