Michael Turner 
To track expenses for a small business, open a separate business bank account and card, record every expense in accounting software or a spreadsheet, save digital copies of receipts, sort expenses into clear categories and review them every month. Good records save you money at tax time and show you where your business is really spending.
- Use a separate business account for all business spending.
- Photograph receipts as soon as you get them.
- Use consistent expense categories that match your tax forms.
- The IRS generally asks you to keep records for at least 3 years, and longer in some cases.
Why expense tracking matters
- Lower taxes: you can only deduct expenses you can prove.
- Better decisions: you see which costs are growing and where profit goes.
- Less stress: no last-minute receipt hunting before tax deadlines.
- Audit protection: the IRS expects records that support your income and deductions.
Step 1: Separate business and personal money
Open a business checking account and get a business credit or debit card. Pay every business expense from these accounts, and never use them for personal purchases. This one habit makes everything else easier.
Step 2: Choose a tracking method
| Method | Best for | Pros | Cons |
|---|---|---|---|
| Spreadsheet | Very small or new businesses | Free, simple | Manual entry, easy to fall behind |
| Accounting software | Most small businesses | Bank sync, reports, tax-ready | Monthly fee |
| Receipt-scanning apps | Lots of small purchases | Fast capture on the go | Usually needs another tool for full books |
| Bookkeeper | Busy owners or growing businesses | Saves time, fewer errors | Higher cost |
Popular accounting tools connect to your bank and sort transactions automatically. You just review and approve them.
Step 3: Set up expense categories
Use categories that match your tax return. Common examples:
- Advertising and marketing
- Office supplies and software
- Rent or home office costs
- Vehicle and travel
- Meals (often only partly deductible)
- Professional services (accountant, lawyer)
- Insurance, licences and fees
- Payment processing fees
- Contractors and payroll
Step 4: Capture every receipt
- Snap a photo of paper receipts immediately.
- Forward email receipts to a dedicated folder or your accounting app.
- Write a quick note on what it was for and, for meals, who you met.
Step 5: Track mileage if you drive for business
Keep a log of the date, purpose, start and end locations, and miles for each business trip. Mileage-tracking apps can do this automatically using your phone’s GPS.
Step 6: Review your expenses every month
- Match your records to your bank and card statements (reconciliation).
- Fix any uncategorised or wrongly categorised items.
- Look for subscriptions you no longer use.
- Compare spending with last month and your budget.
How long should you keep business records?
According to the IRS, the general rule is to keep records for 3 years from the date you filed your return. Some situations need longer:
- 6 years if you under-report income by more than 25%
- 7 years for claims involving worthless securities or bad debt
- At least 4 years for employment tax records
Many owners simply keep digital records for 7 years to be safe.
Common mistakes
- Paying business expenses with personal cards
- Waiting until tax season to organise receipts
- Forgetting small, frequent costs like software subscriptions and card processing fees
- Not backing up records
Frequently asked questions
What is the easiest way to track business expenses?
Accounting software connected to a separate business bank account, plus a receipt-capture app.
Can I use Excel or Google Sheets?
Yes, especially when you’re starting out. Update it weekly so you don’t fall behind.
Do I need to keep paper receipts?
Clear digital copies are generally acceptable. Make sure they’re readable and backed up.
What expenses can a small business deduct?
Generally, costs that are ordinary and necessary for your business. Rules have limits and details, so check with a tax professional.
This article is general information, not tax or financial advice.
