Line 11 on Form 2106 is not a dollar figure. It’s the first line of Part II, Section A, and it asks for the date you placed your vehicle in service for business use — in other words, the date you first started driving it for work.1Internal Revenue Service. Instructions for Form 2106 If you bought a car and immediately began using it for qualifying business travel, that’s your purchase date. If you drove the car personally for years and only later started using it for work, the placed-in-service date is when the business use began, not when you bought the vehicle.
What “Placed in Service” Means for Line 11
The placed-in-service date is the day the vehicle became available and was actually used for your business activity. A car sitting in the driveway isn’t in service, even if you owned it. The clock starts when the vehicle is both ready for use and put to that use.
Two situations account for most of the confusion:
- You bought the vehicle new or used and started driving it for work right away. Line 11 is the date you first drove it for a business purpose, which is usually within days of the purchase.
- You already owned the vehicle and used it personally, then converted it to business use. Line 11 is the date of that conversion — the first day you drove it for work — not the original purchase date.1Internal Revenue Service. Instructions for Form 2106
Enter the date in month/day/year format. If you’ve been using the same vehicle for business across multiple tax years, the Line 11 date does not change from year to year. It stays fixed to the original placed-in-service date for as long as you continue reporting that vehicle on Form 2106.
Why the Date on Line 11 Matters
Line 11 looks like a formality, but it drives two things behind the scenes.
First, if you use the actual expense method (Section C of Part II), the placed-in-service date sets your depreciation schedule. Depreciation is calculated over a fixed recovery period that begins on the date entered on Line 11, and the depreciation tables the IRS uses assume that starting point.
Second, the date affects your eligibility to choose the standard mileage rate. To use the standard mileage rate, you generally must elect it in the first year the vehicle is placed in service for business. If Line 11 shows a prior year and you started with actual expenses back then, you can’t switch to standard mileage now. Getting the date right protects your ability to use the method you want.
Where Line 11 Fits in Part II
Part II of Form 2106 is where you calculate the deductible cost of using your vehicle for work, and Section A collects the general information the rest of the section relies on. Line 11 sits at the top of that section, followed by:
- Line 12: total miles driven during the year
- Line 13: business miles included in that total
- Line 14: business-use percentage (Line 13 divided by Line 12)
- Line 15: average daily commuting distance
- Line 16: total commuting miles for the year
From there you move to Section B (standard mileage rate) or Section C (actual expenses), but not both for the same vehicle in the same year.2Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile Section D handles depreciation for filers who chose actual expenses. The vehicle expense number that comes out of Part II feeds back into Part I as part of your total unreimbursed employee business expenses.
Before You Fill Out Line 11: Confirm You Can File Form 2106
Most W-2 employees can no longer file Form 2106 at all. The Tax Cuts and Jobs Act eliminated the deduction for unreimbursed employee business expenses starting in 2018, and later legislation made that change permanent.3Office of the Law Revision Counsel. 26 USC 67 – 2-Percent Floor on Miscellaneous Itemized Deductions Four groups can still file:
- Armed Forces reservists who travel more than 100 miles from home for reserve duties4Internal Revenue Service. Publication 3 – Armed Forces Tax Guide
- Qualified performing artists
- Fee-basis state or local government officials
- Employees with impairment-related work expenses1Internal Revenue Service. Instructions for Form 2106
If you don’t fall into one of those categories, the IRS instructions say not to file the form, and Line 11 doesn’t apply to you.
Backing Up the Date With Records
The placed-in-service date should be supported by your own records. For a newly purchased vehicle, the bill of sale, title, or registration date establishes when it became available. For a personal-to-business conversion, your mileage log is what proves the date business use began — the first log entry with a business trip is your Line 11 date.
The IRS expects mileage log entries to be contemporaneous, meaning written at or near the time of each trip rather than reconstructed later.5Internal Revenue Service. Publication 463 – Travel, Gift, and Car Expenses Each entry should show the date, starting point, destination, business purpose, and miles driven. You also need odometer readings from the beginning and end of the tax year to support the totals on Lines 12 and 13.
Common Mistakes on Line 11 and the Vehicle Section
The most frequent error on Line 11 is entering the purchase date when the vehicle was actually used personally for a period before business use began. That mismatch can produce an incorrect depreciation calculation if you’re using actual expenses, and it can misrepresent when the standard mileage election was available.
Filers also occasionally change the Line 11 date from year to year on the same vehicle. Once a vehicle is placed in service, that date is fixed. Report the same date each year you continue to use the vehicle for business.
A separate mistake, further down the section but often bundled with Line 11 problems, is treating commuting miles as business miles on Line 13. The drive between your home and a regular workplace never counts as business use, no matter the distance. Business mileage starts when you leave your regular workplace for another work destination, or when you drive from home to a temporary work location. Miscounting here inflates your business-use percentage on Line 14 and, by extension, your vehicle deduction.
Finally, if you’re a reservist, remember that only travel more than 100 miles from home qualifies for the above-the-line deduction that Form 2106 supports.4Internal Revenue Service. Publication 3 – Armed Forces Tax Guide The Line 11 date establishes when the vehicle entered service, but only the qualifying trips count toward the miles you report in Section A.