Record Keeping for Sole Traders: What to Track So Self Assessment is Easy
Quick Answer
Keep records of all income and expenses throughout the year. Store receipts (digital is fine), track invoices paid, separate business and personal finances, and review monthly. Good records make Self Assessment faster, help you claim all your expenses, and protect you if HMRC asks questions.
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Why Record Keeping Matters
Good records aren't just for HMRC—they help you:
- Know your profit at any time
- Claim every expense you're entitled to
- Set aside the right amount for tax
- File quickly when January comes
- Answer HMRC questions if they arise
Poor records lead to guessing, missed deductions, and stress. A simple system prevents all that.
What You Must Track
1. All Income
Every payment you receive for your work:
- Invoice amounts and dates
- Date payment was received
- Client/customer name
- Payment method (bank, PayPal, cash, etc.)
Tip: Track income when it hits your account, not when you send the invoice.
2. All Business Expenses
Everything you spend for the business:
- What it was for
- Date of purchase
- Amount
- Evidence (receipt, invoice, bank statement)
For a full list of what counts, see our allowable expenses guide and expenses checklist.
3. Bank Transactions
Your bank statements show income and expenses. They're essential backup even if you have individual receipts.
4. Mileage (if applicable)
If you claim business travel:
- Date of journey
- From/to locations
- Purpose
- Miles driven
See our mileage guide for details.
How Long to Keep Records
HMRC requires you to keep records for at least 5 years after the 31 January submission deadline for that tax year.
Example: For tax year 2024/25 (filed by 31 January 2026), keep records until at least 31 January 2031.
After that, you can safely delete them.
Receipts: Do You Really Need Them?
Yes—for expenses you want to claim.
Without evidence, HMRC can reject the expense if they enquire. But "evidence" doesn't have to be a paper receipt:
- Bank/card statements can support many claims
- Digital receipts (email confirmations) count
- Photos of paper receipts are fine
- Invoices you paid work too
What matters is that you can prove the expense was real and business-related.
A Simple System That Works
You don't need fancy accounting software. Here's a minimal setup:
Step 1: Separate Your Finances
Use a separate bank account for business income and expenses. This makes tracking much easier.
See our guide to separate bank accounts.
Step 2: Create a Simple Spreadsheet
Two tabs:
Income tab:
| Date | Client | Description | Amount | Paid? |
|---|---|---|---|---|
| 12 Apr | ABC Ltd | Website project | £1,500 | Yes |
Expenses tab:
| Date | Category | Description | Amount | Receipt? |
|---|---|---|---|---|
| 15 Apr | Software | Design app subscription | £20 | Yes |
Step 3: Store Receipts Digitally
- Create a folder (Google Drive, Dropbox, your phone)
- Snap photos of paper receipts immediately
- Name files clearly:
2024-04-15_design-software.jpg
Step 4: Update Weekly or Monthly
Set a recurring reminder:
- Log any new income
- Log any new expenses
- Check bank statement matches
- Snap any outstanding receipts
15–30 minutes a week is enough for most sole traders.
Monthly Checklist
Use this each month:
- All income received is logged
- All business expenses logged
- Receipts stored (digital or paper)
- Bank statement reviewed
- Profit so far calculated
- Tax set-aside transferred to savings
See our tax set-aside guide for how much to save.
End-of-Year Checklist
Before filing:
- All 12 months' income totalled
- All expenses totalled by category
- Mileage log complete (if claiming)
- Home office calculation done (if claiming)
- Any missing receipts tracked down
- Profit calculated: income − expenses
- Supporting documents stored safely
Tools You Can Use
Free/Simple Options
- Spreadsheet (Google Sheets, Excel) – Good for basic tracking
- Phone notes/photos – Quick receipt capture
- Bank statements – Monthly download and save
Paid Accounting Software
- FreeAgent – Popular with UK freelancers
- QuickBooks Self-Employed – Easy mobile app
- Xero – More powerful, steeper learning curve
Software automates some tracking but costs money. A spreadsheet is fine for most sole traders with simple finances.
Common Mistakes
1. Keeping everything in your head
You will forget expenses. Write them down as they happen.
2. Mixing personal and business money
This makes tracking a nightmare. Use a separate account.
3. Throwing away receipts
"I'll remember" doesn't work. Store digitally within 24 hours.
4. Leaving it all until January
Trying to reconstruct a year's records in a few days is stressful and leads to missed expenses.
5. Not tracking mileage
If you use a vehicle for business, keep a log. Estimating later is unreliable.
6. Overcategorising
You don't need 30 expense categories. HMRC cares about the total—keep it simple.
FAQ
Do I legally need to keep records?
Yes. HMRC requires sole traders to keep accurate records of income and expenses.
Can I use bank statements instead of receipts?
Bank statements help, but receipts are better evidence—especially for larger expenses or items that aren't obvious from the description.
How long must I keep records?
At least 5 years after the Self Assessment deadline for that year.
What if I lose a receipt?
Use a bank statement as backup. For one-offs, HMRC may accept it. For repeated missing receipts, you risk losing the deduction.
Do I need accounting software?
No. A simple spreadsheet works for most sole traders.
What categories should I use for expenses?
Keep it simple: travel, office, software, phone, equipment, professional services, marketing, etc. Match roughly to the Self Assessment form.
Should I track VAT?
Only if you're VAT-registered. Most sole traders under the threshold don't need to.
What happens if HMRC asks for records?
You'll need to produce them. If they're organised, this is easy. If not, it can trigger further investigation.
How do I track cash payments?
Log them in your spreadsheet immediately. Write a note or take a photo of any receipt.
Can I claim without a receipt?
In some cases (bank statement as evidence), but it's risky. Keep receipts whenever possible.
Next Steps
Good records make everything easier: tax estimates, filing, and peace of mind.
Learn about allowable expenses, home office and mileage, and how much tax to set aside.
Back to the Learn hub.
This guide is for general information only. Tax rules change, and everyone's situation is different. Always check the latest HMRC guidance and consider speaking to a qualified accountant if you're unsure.