Reservist Mileage Deduction: 100-Mile Test, Rate Cap, and Filing

If you serve in a reserve component and travel more than 100 miles from home with an overnight stay for your reserve duties, the reservist mileage deduction lets you write off your unreimbursed travel costs — capped at federal rates — as an above-the-line adjustment on Schedule 1. You calculate the amount on Form 2106 and carry it to Line 12 of Schedule 1 (Form 1040). Because it sits in the adjustments section, it lowers your adjusted gross income whether you take the standard deduction or itemize.¹

Who Can Claim It

The deduction is for members of a reserve component of the Armed Forces traveling for reserve duties. The IRS lists qualifying members as those serving in the Army, Navy, Marine Corps, Air Force, or Coast Guard Reserve; the Army or Air National Guard of the United States; or the Ready Reserve Corps of the Public Health Service.² Most employees lost the ability to deduct unreimbursed work expenses after 2017. Reservists are one of the few groups that kept the benefit.¹

Active duty travel is a different matter. If you’re on active duty orders, your travel is typically reimbursed by the military or handled under other provisions, such as the moving expense rules for a permanent change of station. This deduction applies to reserve and Guard duties performed while you’re not on active duty.

The 100-Mile and Overnight Test

Two conditions have to be met together. The travel must take you more than 100 miles from home, and it must require an overnight stay.¹ Both come directly from the statute.³ Drive 150 miles to drill and stay in a hotel? That qualifies. Drive the same 150 miles, attend a meeting, and drive home the same day? It doesn’t.

The trip itself runs from the moment you leave home until you return, and every unreimbursed expense during that window is on the table — not just the hours you’re in uniform. A Friday-evening drive, drill on Saturday and Sunday, and a Sunday-night drive home is one qualifying trip: mileage each way, plus the hotel and meals in between.²

What You Can Deduct, and the Federal Rate Cap

Even when your actual costs run higher, the deduction is capped at federal reimbursement rates. The statute limits it to “a rate not in excess of the rates for travel expenses… authorized for employees of agencies” under federal travel rules.³ In practice, three caps operate together.

Vehicle expenses are capped at the IRS standard mileage rate, which is 72.5 cents per mile for 2026, plus parking, ferry fees, and tolls.⁴ If your drill site is 130 miles from home and you make six qualifying trips, that’s 1,560 round-trip miles, which comes to $1,131 in deductible vehicle expense at the 2026 rate. Tolls and parking on those trips are on top of that.⁵

Form 2106 lets you calculate vehicle costs using either the standard mileage rate or actual expenses (fuel, repairs, insurance, depreciation, and so on).⁵ Because the reservist deduction is capped at the standard mileage rate when it lands on Schedule 1, actual expenses rarely beat it. If your real per-mile cost is higher, you’re still capped; if it’s lower, you’d deduct less.

Lodging is capped at the federal per diem rate for the city where you stay. The IRS offers a simplified high-low method: for the period beginning October 1, 2025, the high-low per diem is $319 per day in high-cost localities and $225 per day everywhere else in the domestic United States, and those figures include the meals component.⁶ Spending $400 a night on a hotel doesn’t get you a $400 deduction; the cap holds.

Meals and incidental expenses are capped at the federal M&IE rate and then reduced by 50%. Reservists are not exempt from the general 50% meal limit,⁷ and the IRS’s own example in Publication 3 applies it to a reservist’s travel.² Under the high-low method the M&IE portion is $86 per day in high-cost areas and $74 elsewhere, so after the 50% cut you’re deducting $43 or $37 per day for meals.⁶

Subtract Any Military Reimbursement First

Only the unreimbursed portion is deductible. If the military pays a travel allowance or per diem for the trip, subtract it before calculating what’s left.² Qualifying expenses of $800 minus a $300 reimbursement leaves $500, still subject to the federal caps and the 50% meal limit. Reimbursements often cover one category and not another, so track mileage, lodging, and meals separately and identify the gap in each. When a trip is fully reimbursed at or above the federal rate, there’s nothing left to deduct for it.

Records You Need to Keep

The IRS wants contemporaneous records: entries logged at or near the time of travel, not reconstructed at tax time. The burden of proof is on you.

For each qualifying trip, Publication 463 calls for the date, destination, business purpose, starting and ending odometer readings, and total mileage. You also track total miles driven for the year so the reserve percentage can be shown if actual expenses ever come into play.⁸

Beyond the mileage log, hold on to your official military orders, drill schedules, or other branch-issued documents that show the travel was required. The dates on those should line up with your log. Keep hotel and meal receipts showing date, location, and amount.

Electronic records and mileage-tracking apps are acceptable as long as they capture the same detail as a paper log and can be produced in a readable format on request. Using an app doesn’t shift responsibility off the taxpayer.⁹ Export and back up the data periodically; apps get discontinued and losing your records three years later defeats the point.

Keep everything for at least three years from the date you filed the return, which is the general assessment window.¹⁰

How to File It

Two forms are involved: Form 2106 to calculate, Schedule 1 to claim.

Complete Form 2106

Use Form 2106, Employee Business Expenses, to figure your qualifying travel costs. Part II handles vehicle expenses — enter your qualifying miles and the standard mileage rate. The rest of the form covers other travel expenses such as lodging and meals. Your total appears on Line 10.¹¹

Transfer to Schedule 1, Line 12

Take the portion of Line 10 that relates to reserve travel more than 100 miles from home and enter it on Schedule 1 (Form 1040), Line 12. That amount cannot exceed the federal rate cap: the standard mileage rate for vehicle costs and the federal per diem for lodging and meals.² Attach Form 2106 to your return.¹¹ Because Schedule 1 Line 12 is an adjustment to income, the deduction reduces your AGI before the standard-versus-itemized decision.¹

Audit Exposure

Travel deductions get scrutiny because they’re easy to inflate. Weak records don’t just cost you the deduction; the IRS can add a 20% accuracy-related penalty on the additional tax owed,¹² and interest runs from the original due date.

Common triggers include round numbers (a clean 5,000 miles reads as estimated, not logged), deductions that look outsized against income, and a missing Form 2106. With a contemporaneous mileage log, matching orders, and receipts, an audit of this deduction is straightforward. Without them, the IRS usually disallows the whole thing rather than negotiating pieces of it.

1
Internal Revenue Service. Topic No. 511, Business Travel Expenses
2
Internal Revenue Service. Publication 3 (2025), Armed Forces’ Tax Guide
3
Office of the Law Revision Counsel. 26 U.S. Code 62 – Adjusted Gross Income Defined
4
Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile
5
Internal Revenue Service. 2025 Instructions for Form 2106 – Employee Business Expenses
6
Internal Revenue Service. 2025-2026 Special Per Diem Rates Notice 2025-54
7
Office of the Law Revision Counsel. 26 U.S. Code 274 – Disallowance of Certain Entertainment, Etc., Expenses
8
Internal Revenue Service. Publication 463 (2025), Travel, Gift, and Car Expenses
9
Internal Revenue Service. Automated Records
10
Office of the Law Revision Counsel. 26 U.S. Code 6501 – Limitations on Assessment and Collection
11
Internal Revenue Service. Instructions for Form 2106 (2025)
12
Office of the Law Revision Counsel. 26 U.S. Code 6662 – Imposition of Accuracy-Related Penalty on Underpayments