How to Keep Your Records Clean
If you’re self-employed or running a small business, claiming legitimate expenses is part of keeping your tax bill fair.
But some expenses are more likely to raise questions than others, usually because they’re easy to mix up with personal spending, or because the “business purpose” isn’t obvious from a bank statement.
This article is not tax advice. Think of it as a practical guide to keeping clean records, so if HMRC ever asks, you can answer confidently and quickly.
The golden rule (in plain English)
For any expense you claim, you should be able to show:
- What you bought
- When you bought it
- How much does it cost
- Who did you buy it from
- Why was it necessary for your business
That last one (“why”) is where most problems start.
1) Meals and entertaining
Why it gets questioned: meals can be personal, and “entertaining” is often misunderstood.
Keep it clean:
- Keep the receipt (not just the card transaction)
- Write a short note: who you met, where, and the business reason
- If it’s genuinely personal (even if you talked about work), don’t claim it
2) Travel and mileage
Why it gets questioned: It’s easy to blur the line between business travel and commuting or personal trips.
Keep it clean:
- Keep a simple mileage log: date, start/end, purpose, miles
- Keep tickets/receipts for trains, parking, and tolls
- Be consistent, small, regular logs beat “end-of-year guesswork”
3) Home office costs
Why it gets questioned: Many people work from home, but not everyone tracks it properly.
Keep it clean:
- Decide on a method and stick to it (simple allowance or a sensible calculation)
- Keep evidence of key bills (electric, broadband, etc.)
- Make sure the claim reflects reality (don’t overreach)
4) Mobile phone and broadband
Why it gets questioned: Most people use these personally as well as for work.
Keep it clean:
- If it’s mixed use, claim a reasonable business proportion
- Keep the contract and monthly bills
- Consider a separate business line if your business use is high
5) Clothing
Why it gets questioned: everyday clothing is usually personal, even if you wear it to work.
Keep it clean:
- Only claim items that are clearly for work (for example, protective wear or branded uniform)
- Keep receipts and note the role it supports
- If it could be worn normally outside work, treat it with caution
6) Training, courses, and subscriptions
Why it gets questioned: training can be personal development or directly linked to your current business.
Keep it clean:
- Keep invoices/receipts and proof of attendance
- Note how it supports your current services (not a future career change)
- Keep a list of active subscriptions and cancel what you don’t use
7) “Other” and miscellaneous purchases
Why it gets questioned: vague categories look messy, even when the spending is valid.
Keep it clean:
- Avoid dumping lots of items into “misc”
- Categorise properly (software, supplies, marketing, etc.)
- Add short notes to unusual transactions while you still remember
A simple record-keeping system you’ll actually use
You don’t need a perfect system; you need a consistent one.
- One place for receipts: a single app, folder, or email label
- One weekly admin slot: 15–20 minutes to upload, match, and note anything unusual
- One monthly review: check your categories, look for missing receipts, and make sure your claims still make sense
What “good evidence” looks like (quick examples)
- A receipt + note: “Client meeting to agree project scope”
- A mileage log entry: “Site visit to customer premises”
- A course invoice + note: “Training to improve current service delivery”
FAQ (quick answers in plain English)
Do I need receipts for everything?
Ideally, yes. A bank transaction shows that you spent money, but not always what you bought or why it was for the business. If you can’t get a receipt (for example, it’s genuinely unavailable), keep whatever evidence you can and add a short note explaining the business purpose.
What if an expense is partly business and partly personal?
That’s common (phones, broadband, home working). The key is to claim a reasonable business proportion and be consistent. If you ever had to explain it, you should be able to say how you arrived at the split.
Can I claim clothes if I wear them for work?
Usually, everyday clothing is treated as personal, even if you only wear it while working. Items that are clearly for work (for example, protective clothing or branded uniform) are safer. If it could be worn normally outside work, treat it with caution.
Can I claim meals when I’m working away from home?
Sometimes, but meals are an area that gets questioned because they can be personal. Keep the receipt and a short note of the business reason. If you’re unsure, it’s worth checking with your accountant or bookkeeper.
How long should I keep records?
Keep your records for the required period for your business and tax situation. If you’re not sure what applies to you, ask your bookkeeper or accountant and set a simple rule you can follow.
What’s the easiest habit to start with?
A weekly 15-minute admin slot. Upload receipts, match transactions, and add notes to anything unusual while you still remember. That one habit prevents most year-end stress.
Final thought: clean records reduce stress
Most HMRC problems aren’t caused by fraud; they’re caused by messy records and unclear explanations.
If your bookkeeping is up to date and your evidence is tidy, you’re in a much stronger position, and you’ll spend less time worrying about “what if.”
If you want help getting your records organised
If you’re not sure what you can claim, or you want a simple system that fits your working week, Zenith Bookkeeping can help you get everything structured properly — without the jargon. Contact us today for a no-obligation chat, and let’s see how we can help you…
