Mileage guide
Leased-car mileage deductions: the records behind your method choice
By FlatMile ·
General US federal recordkeeping information, not individual tax advice. Tax treatment depends on your circumstances; consult a qualified adviser for your claim.
At a glance
A leased car can be eligible for the standard mileage method, but choosing that method is a lease-period decision. IRS Topic 510 says to continue it for the entire lease period, including renewals. Review the existing lease and prior tax treatment before switching to actual expenses because this year's payments look larger.
This guide helps you assemble the decision record. It does not determine whether a particular renewal, replacement agreement or purchase option is a new transaction for your tax return.
Keep the contract with the vehicle log
Give the leased vehicle a stable identifier in your records. Keep the signed agreement, start date, term, payment schedule and any extension paperwork with that identifier. Store earlier tax workpapers showing the method used for the vehicle.
A mileage allowance in the lease is the lessor's contract limit. It is not a business-mileage allowance from the IRS. Similarly, an excess-mileage invoice does not show which journeys were business. Maintain the dated trip log independently of the leasing company's annual distance figures.
Record total use as well as business use, so personal driving does not disappear from the comparison. If more than one person drives the car, agree on who records each journey and how the total is reconciled.
A fictional lease timeline
Imagine Morgan leases a car in April 2026 for three years and uses the standard mileage method for eligible business driving. In late 2028, Morgan considers a six-month extension.
| Event | Record to retain | Question to resolve |
|---|---|---|
| April 2026 lease starts | Signed agreement and vehicle details | What method was chosen for business use? |
| Each year closes | Trip log, total miles and return workpapers | Is the treatment consistent with that choice? |
| Extension proposed | Written extension and revised payment terms | Is this a renewal of the existing lease? |
| Car returned or purchased | Handover or purchase documents | What closes the lease record and what starts next? |
This is a timeline for review, not permission to change methods in 2029. Bring the documents to the preparer before treating a contract amendment as a fresh method choice. Keep any written explanation with the annual records so the same issue does not have to be reconstructed later.
If actual expenses are under consideration
Keep each lease payment and the evidence of business versus personal use. Do not assume every dollar paid at signing is deductible immediately. Publication 463 addresses advance lease payments and possible inclusion amounts; these need the correct vehicle value, start year and facts.
Ask the preparer to identify which contract amounts are lease expenses and which are deposits, purchase payments or another item. Keep the original invoice even if your bookkeeping software groups all of them under one category. A clear document trail is more useful than a mileage app's estimated value for this question.
Before submitting the year
- Match the log's vehicle name to the lease agreement.
- Check that business-purpose entries are complete and commuting is reviewed separately.
- Reconcile the total miles with available odometer and service records.
- Tell the preparer about any extension, return, replacement or buyout.
- Keep the method decision with the lease paperwork for future years.
The broader standard mileage versus actual expenses guide explains the two approaches. This lease file supplies the history needed to apply that comparison to your vehicle.