Untracked expenses cost businesses money twice: once when you can't claim costs you were entitled to, and again in the hours spent hunting for receipts at year end. A simple routine, with a separate account, quick receipt capture and a weekly catch-up, makes expense tracking almost effortless. Here's a system that works for freelancers and small businesses.
Step 1: Separate business and personal money
A dedicated business bank account makes everything easier: every transaction in it is business-related, reconciliation is faster and you have a clear record if HMRC ever asks questions. Limited companies must keep company money separate; sole traders benefit from doing the same.
Step 2: Capture receipts immediately
| Method | Best for |
|---|---|
| Photograph receipts with your phone | Paper receipts from shops, fuel, meals |
| Forward email receipts to one folder or address | Online purchases and subscriptions |
| Download invoices from supplier portals monthly | Software, utilities, phone |
| Attach receipts in bookkeeping software | Linking evidence to each transaction |
The rule is simple: capture it the day you get it. Faded, lost receipts are the main reason expenses go unclaimed.
Step 3: Use consistent categories
Consistent categories make reports meaningful and tax returns easier. Common examples:
| Category | Examples |
|---|---|
| Office costs | Stationery, printing, postage |
| Software and subscriptions | Accounting software, design tools, cloud storage |
| Travel | Train tickets, parking, mileage |
| Phone and internet | Mobile contract, broadband (business share) |
| Marketing | Advertising, website costs, printing |
| Professional fees | Accountant, legal, insurance |
| Equipment | Computers, tools, furniture |
| Cost of sales | Stock, materials, subcontractors |
Your accountant can map these to the categories used in your tax return. Our guide to the chart of accounts explains how categories fit into your books.
Step 4: Track mileage properly
If you use a personal vehicle for business, record each business journey: date, start and end points, purpose and miles. HMRC's approved mileage rates can be used instead of claiming actual vehicle costs. A simple mileage log or app saves time later.
Step 5: Record and reconcile weekly
Set aside 15 minutes a week to:
- Match bank transactions to receipts
- Categorise anything uncategorised
- Note anything missing and chase it
- Check for duplicate or personal transactions
Reconciling weekly, rather than once a year, catches errors while you still remember what each payment was for. Our guide to double-entry bookkeeping explains why matching records matters.
Step 6: Know what you can and can't claim
| Generally allowable (if wholly and exclusively for business) | Generally not allowable |
|---|---|
| Office supplies and software | Personal clothing (unless protective or a uniform) |
| Business travel | Commuting to your regular workplace |
| Business share of phone and internet | Entertaining clients (for most businesses) |
| Professional fees and insurance | Fines and penalties |
| Marketing and advertising | Personal expenses |
Rules have nuances, such as home working allowances and the treatment of equipment, so check with an accountant or HMRC guidance for your situation. This article isn't tax advice.
Step 7: Keep records for long enough
HMRC generally expects sole traders to keep records for at least five years after the 31 January Self Assessment deadline for the relevant tax year, and limited companies usually for six years. Digital copies are generally fine if they're clear and stored securely.
A weekly expense routine
- Photograph any paper receipts from the week
- Forward email receipts to your receipts folder
- Match bank transactions to receipts in your software
- Categorise new expenses
- Log business mileage
- Chase any missing receipts
Example: a month of expenses, categorised
| Date | Supplier | Description | Category | Amount |
|---|---|---|---|---|
| 2 Mar | Design software | Monthly subscription | Software and subscriptions | £50.00 |
| 5 Mar | Train operator | Client meeting, return ticket | Travel | £42.60 |
| 9 Mar | Stationery shop | Printer paper and notebooks | Office costs | £18.40 |
| 14 Mar | Mobile provider | Monthly contract (business share) | Phone and internet | £20.00 |
| 21 Mar | Accountant | Quarterly bookkeeping review | Professional fees | £150.00 |
| 28 Mar | Ad platform | Social ads | Marketing | £120.00 |
Figures are illustrative. Each line has a receipt attached and a consistent category, so month-end takes minutes rather than hours.
Expenses and VAT
If your business is VAT-registered, keep valid VAT receipts for purchases where you reclaim VAT, record the VAT amount separately in your books, and check which expenses qualify. Rules for things like business entertainment and mixed personal use differ, so confirm the treatment with your accountant or HMRC guidance. Good bookkeeping software records VAT on each transaction, making returns far easier.
Use software to make it easier
Bookkeeping software can import bank transactions, store receipts and produce reports such as profit and loss. Zelvorm Books is our free double-entry bookkeeping software, with invoices, bills and reports built in. Compare options in our guide to free bookkeeping software.
The short version
Use a separate business account, capture receipts the day you get them, use consistent categories, log mileage, reconcile weekly, understand what's allowable and keep records for the required period. Fifteen minutes a week saves hours at year end, and money at tax time.
