Fuel Expense Records for Trucking Taxes

Why fuel recordkeeping matters more than most expenses

Fuel is typically the largest operating expense for an owner-operator — often 30 to 40 percent of gross revenue depending on routes, fuel prices, and whether fuel surcharges are included in settlements. That scale means fuel is also the expense most likely to be scrutinized in a tax review and the one where missing documentation costs the most. A solid fuel recordkeeping system serves triple duty: it supports the income tax deduction, feeds the IFTA quarterly return, and gives you real data to evaluate profitability by load or route.

What to keep

• Fuel receipts — date, vendor, address, gallons, amount, and which truck or driver
• Fuel card statements — monthly PDF and transaction-level CSV export
• Jurisdiction or state where each purchase was made
• Gallons purchased by fuel type (diesel vs. DEF vs. reefer fuel)
• Vehicle identifier or card number to tie purchases to a specific truck
• IFTA quarter reference so records are pre-sorted for quarterly filing

The fuel card statement as a primary record

A dedicated fuel card creates a transaction record for every purchase that most tax preparers and IFTA auditors will accept as strong documentation. But card statements have limits: they may not catch cash fuel purchases, and some card programs use a summary format that doesn't show individual transaction detail. Download both a PDF summary and a CSV or transaction-level export each month. The PDF is readable; the CSV is sortable by jurisdiction for IFTA and by date for bookkeeping reconciliation.

Tax and IFTA overlap

Fuel records may support both income tax bookkeeping and IFTA reporting, but the two use data differently. Income tax needs the total dollar amount of fuel purchased as a business expense. IFTA needs gallons by jurisdiction — not dollars — to calculate fuel tax credits and debits per state. A good fuel record captures both: date, vendor, jurisdiction, gallons, and amount. If the record only shows total dollars, it works for income tax but won't support the IFTA return without additional records.

Monthly reconciliation habit

Reconcile fuel purchases to the bank or fuel card statement monthly while missing receipts are still recoverable. The practical rule: if a fuel card transaction has no backup receipt, the statement is usually sufficient documentation. If a cash purchase has no receipt and doesn't appear on any card statement, it needs a written note explaining the date, location, gallons, and amount before the memory fades.

What to do about receipts that fade or disappear

Thermal paper receipts fade quickly in a hot cab, a wallet, or a laundry cycle. Photograph or scan receipts on the same day you get them — even a quick phone photo is better than a blank piece of paper at tax time. Most fuel card apps now allow receipt photo uploads at the point of purchase. If a receipt is already gone and the card statement covers the transaction, keep the statement and note the missing receipt — a documented gap is more defensible than an unexplained transaction.

Helpful Tools

• Fuel Receipt Organizer

FAQ