The Best Spreadsheet to Track Gig Work Expenses and Mileage for Tax Deductions

Every mile you drive for a delivery, every dollar in platform fees, every hot bag and phone charger you buy for your gig — those are deductions. And if you’re not tracking them, you’re handing the IRS money you don’t owe. Gig workers routinely overpay their taxes by hundreds or thousands of dollars for one reason: they never logged the expenses that would have lowered their bill.

The frustrating part is that the fix is almost free. A single spreadsheet, kept up to date as you work, can be the difference between a $7,000 deduction and a $0 deduction on mileage alone. Here’s how to build the record that keeps your money in your pocket.

Why Untracked Expenses Cost Gig Workers So Much

Gig income is taxed on profit, not revenue. You gross what the app pays you, then subtract your business expenses, and you pay tax — including 15.3% self-employment tax — only on what’s left. Every legitimate expense you fail to record inflates your taxable profit and your bill.

Mileage is the biggest example. The IRS standard mileage rate was 70 cents per mile in 2025. A delivery driver who logs 12,000 business miles in a year has a $8,400 deduction — money that never gets taxed. Skip the log and that $8,400 becomes taxable income, costing you well over $2,000 in unnecessary tax at typical rates. That’s a car payment for months, lost because of missing records.

The Expenses Every Gig Worker Should Be Tracking

Beyond mileage, gig work generates a surprising number of deductible costs. If it’s ordinary and necessary for your hustle, it likely counts:

• Vehicle costs — mileage (standard rate) or actual gas, maintenance, insurance, and depreciation prorated to business use
• Phone and data — the business-use portion of your bill; your gig runs on your phone
• Platform and payment fees — every cut the app takes is a deduction
• Supplies and equipment — hot bags, phone mounts, chargers, packaging, inventory
• Parking and tolls — incurred while working
• Health and safety items — masks, sanitizer, and similar business-use supplies
• Software and subscriptions — mileage apps, accounting tools, anything you pay for to run the hustle

The key is capturing them when they happen. Nobody reconstructs a year of gas receipts and toll charges from memory in April. The ones you don’t log are the ones you lose.

What Your Expense Tracker Needs

A gig expense spreadsheet doesn’t need to be complicated — it needs to be consistent. At minimum, each expense row should capture:

• Date of the expense
• Category (vehicle, phone, supplies, fees, etc.) so you can total by type
• Amount
• Payment method / note (what it was, which gig it was for)

And a separate mileage log with:

• Date of the trip
• Purpose (which platform, delivery run, supply run)
• Miles driven
• Deduction — miles multiplied by the current IRS rate, calculated for you

When those two logs feed a running total, you can see your year-to-date deductions at any moment — and, just as importantly, your net profit, which is what your taxes are actually based on.

Standard Mileage vs. Actual Expenses: Which to Use

You generally have two ways to deduct vehicle costs. The standard mileage rate multiplies your business miles by the IRS rate (70 cents in 2025) — simple, and often the bigger deduction for high-mileage drivers. The actual-expense method adds up real costs (gas, repairs, insurance, depreciation) and deducts the business-use percentage.

You have to track your mileage either way, because even the actual method needs your business-use percentage of total driving. The practical move for most gig drivers: log every mile, let the spreadsheet calculate the standard-rate deduction, and compare. A tracker like the Side Hustle Income Tracker keeps both your mileage and your itemized expenses in one place so the comparison — and the deduction total — is automatic.

Keep Records That Actually Hold Up

Deductions are only as good as your ability to back them up. The IRS can ask you to substantiate what you claimed, so two things matter: a contemporaneous log (records kept as events happen, not reconstructed later) and saved receipts for your expenses. A dated spreadsheet with categories, amounts, and notes is precisely the kind of contemporaneous record that stands up to scrutiny. Snap a photo of receipts and note them the same day, and you’re covered.

Turn Every Mile and Fee Into Money You Keep

Gig work is a numbers game, and the number that matters most is your net — after every mile and every deductible dollar comes off the top. Track your mileage and expenses consistently, calculate the deduction as you go, and you’ll keep hundreds or thousands more of what you earn. The record costs you a few seconds per trip. The deduction is worth thousands.