Who this is for: carrier, owner-operator
IFTA Quarterly Filing Checklist for Owner-Operators
IFTA licensees must file a quarterly fuel tax return by the last day of the month following each quarter. The return reports miles traveled and gallons of fuel purchased in each member jurisdiction. Net tax liability or refund is calculated based on each jurisdiction's tax rate and the fuel actually consumed in that state.
Important Notice
IFTA quarterly filing deadlines and procedures are set by your base jurisdiction. Tax rates change quarterly — use the rates published by your base state for the applicable quarter.
Checklist
Checkboxes reset on page reload. This is a reference tool only — not a saved record.
How IFTA net tax is calculated — a worked example
IFTA uses fuel consumed per state, not fuel purchased per state, as the basis for tax allocation. To calculate consumed fuel in a given jurisdiction, divide the miles driven there by the fleet's average fuel economy for the quarter. Say a truck drove 4,800 miles in Texas during Q2 at an average of 6 mpg — that's 800 gallons consumed in Texas. If the driver only bought 550 gallons at Texas pumps, they consumed 250 gallons more than they paid Texas tax on, so they owe Texas for those 250 gallons at the Texas diesel rate. If the driver bought 1,000 gallons in Texas (cheaper fuel, fuller stops), they overpaid by 200 gallons and receive a credit from Texas. The base jurisdiction totals these credits and liabilities across every state and produces one net balance. Most carriers come out owing something or receiving a small refund depending on their purchasing patterns.
Filing with zero activity
IFTA licensees must file a quarterly return even in quarters with no qualified mileage. Filing a zero-activity return is required to keep the license in good standing. Failure to file — even a zero return — can result in the license being suspended or penalties assessed. If you had a quarter where the truck was in the shop, you were between loads, or all activity was intrastate, file a zero return. The form takes five minutes to complete and protects you from a deficiency notice.
Penalty for late filing or non-filing
Late IFTA returns trigger penalties and interest in most jurisdictions. The typical late filing penalty is the greater of $50 or 10% of the net tax due for that quarter — though this varies by state. Interest also accrues on unpaid balances from the original due date, not from when you eventually pay. Carriers who file on time but pay late still face interest, but they avoid the separate filing penalty. If you know you'll owe and can't pay the full amount, file anyway and pay what you can. A partial payment with an on-time return is better than a late return with full payment.
Amending a prior quarter's return
When a fuel receipt turns up after the return was filed, a mileage record was incorrect, or a calculation error is discovered, most base jurisdictions allow an amended IFTA return for the affected quarter. The amendment uses the same form as the original, with corrected figures replacing the prior ones. If the amendment produces additional tax owed, expect interest from the original due date. If it generates a refund, the base jurisdiction typically credits the account or issues payment within a few weeks. Don't leave a known error uncorrected — an underpayment discovered during an audit is assessed with penalties and interest on top of the tax itself.
Jurisdictions with zero mileage in a quarter
Some quarters, your routes won't cover every state you normally operate in. Zero-mileage entries are valid on the return — enter zero miles and zero gallons for those jurisdictions. The issue isn't having zeros; the issue is completely omitting a state that should appear in your records. If your filing history shows regular operation in a state that suddenly disappears from a return, an auditor may flag it as a recordkeeping gap. Enter all applicable jurisdictions with accurate figures, including legitimate zeros, rather than trimming the list.
Fuel cards as a recordkeeping tool
Fleet fuel cards from providers like Comdata, Pilot Flying J, EFS, or similar generate transaction records showing date, location, gallons purchased, and vehicle unit number — exactly what an IFTA return requires. Many carriers use monthly or quarterly fuel card statements as the primary source for purchase data, supplementing with paper receipts for any cash fuel stops. At the end of each quarter, download the transaction history before filing and verify the total gallons match your records. Most card providers also offer IFTA reporting modules that sort purchases by jurisdiction. If you made any cash fuel purchases when the card was unavailable, make sure those are captured separately — they will not appear in the card statement.
Frequently Asked Questions
Can I use an ELD to track IFTA mileage?
Yes. Most modern ELDs track miles by jurisdiction automatically, which simplifies IFTA reporting significantly. Verify that your ELD's jurisdiction tracking is functioning correctly and reconcile the total ELD mileage against your odometer change for the quarter before filing. A small discrepancy is normal; a large one suggests GPS gaps or personal conveyance miles that were handled inconsistently.
Do I need to file a separate return in each state?
No. That is the fundamental benefit of IFTA — one return filed with your base jurisdiction covers all member jurisdictions. Your base state distributes the appropriate tax revenue to each state on your behalf after you file.
What if I operated in a state for the first time this quarter?
Add it to your return with the actual miles and fuel data. Your IFTA license covers all member jurisdictions — you do not need a separate registration for a new state. Use the correct fuel tax rate for that jurisdiction for the quarter.
What is the difference between on-road and off-road diesel for IFTA purposes?
On-road diesel (clear diesel used in highway vehicles) is reportable under IFTA. Off-road or agricultural diesel (often red-dyed and tax-exempt) is not a reportable IFTA fuel because it is not intended for highway use. Keep purchase records for these fuel types completely separate to avoid misreporting on your return.
How do I handle fuel purchases in Canada on my IFTA return?
Canadian provinces participating in IFTA — all except NWT, Nunavut, and Yukon — are reported on the same return as US states. Canadian fuel purchases use Canadian per-litre rates; your base jurisdiction's IFTA return instructions will specify how to convert between imperial and US measurements. The base state handles remittance to Canadian provinces the same way it does for US states.