Reviewed September 2026.
The IRS expects ordinary and necessary business expenses with records you can explain. A December reconstruction of “about 4,000 miles” is weak. Build a light system: mileage log, receipt capture, and a monthly total that feeds Schedule C. Form map: What is a Schedule C and when you need one.
What to log every trip (mileage)
For business driving, record the same day when possible:
| Field | Example |
|---|---|
| Date | 2026-03-12 |
| Start / end odometer or app miles | 42,110 → 42,128 (18 miles) |
| Business purpose | Client install at 400 Oak St |
| Category | Client visit / supply run / not commute |
Common tools: MileIQ, Everlance, Stride, a Google Sheet, or a paper notebook in the glove box. Pick one and stick with it for the tax year. Standard mileage vs actual car expenses is an IRS method choice; confirm the current cents-per-mile rate and rules on IRS.gov before you file. Commuting from home to a fixed office is usually personal, not business.
Expense categories worth a folder
Keep receipts (PDF, photo, or paper) for costs that support the hustle:
- Supplies and materials (packaging, printer ink, trade tools under your capitalization habit).
- Advertising (Google Ads, Meta boosts, printed flyers).
- Software and subscriptions used for the business (QuickBooks, Canva Pro, domain).
- Contract labor you pay (and may need to 1099).
- Home office only if you meet the exclusive-use tests (easy to get wrong; read IRS Publication 587 or ask a preparer).
- Phone/internet: document the business percentage, not 100% of a family plan by default.
Personal groceries, normal work clothes, and commuting fuel generally do not become Schedule C lines because you wished they did. Mixed W-2/1099 years: W-2 vs 1099 tax basics.
Monthly 20-minute reconcile
- Export bank/card CSV for the hustle account only (Side hustle money basics).
- Match each business charge to a receipt photo in a dated folder (
2026-03-receipts). - Total mileage for the month; note any gaps.
- Drop totals into your sheet or Wave/QuickBooks categories.
- Flag personal swipes that hit the hustle card and move them out.
If volume blows past a few dozen transactions a week, compare DIY vs help in When should I hire a bookkeeper vs DIY spreadsheets.
Worked example: March totals
Riley’s March freelancing:
| Item | Amount / count |
|---|---|
| Business miles logged | 612 miles |
| Illustrative standard mileage (confirm current IRS rate) | 612 × published rate |
| Supplies + ads with receipts | $340 |
| Software | $46 |
| Personal coffee on hustle card (removed) | $28 |
Riley’s preparer gets a March tab with miles, receipts, and a note that $28 was personal. That is enough to support deductions and to compute profit for Self-employment tax basics. Filing path: Filing taxes for beginners.
Checklist
- Choose one mileage tool; log the same day.
- Capture receipts within 48 hours.
- Use a hustle-only card when possible.
- Reconcile monthly, not in April.
- Store CSVs and PDFs for at least 3 years (longer if your preparer advises).
Educational only. Not tax advice. Deduction rules, mileage rates, and recordkeeping standards change; confirm with IRS instructions or a CPA/EA.