Business Travel and Taxes

What is deductible, what is taxable, and what records you need when work travel meets the tax code — with the crucial split between employees and the self-employed. General information, not tax advice.

The single thing most travel-tax questions miss is who is asking: the rules are very different for a self-employed person deducting their own costs than for a W-2 employee whose employer reimburses them. Here’s the honest version, with that split made clear. This is general information, not tax advice — confirm your situation with a tax professional and the IRS.

General information — rules and policies change. Confirm current specifics with the relevant authority (your company, the airline, the government) or a professional. Where a public rule applies, its primary source is linked.

Can I deduct a conference on my taxes?

It depends heavily on your employment status. If you’re self-employed or a business owner, the ordinary and necessary costs of a conference that serves your trade or business — registration, travel, lodging, and half of meals — are generally deductible business expenses. If you’re a W-2 employee, the picture is very different: under current U.S. law (the 2017 tax law, in effect through 2025), unreimbursed employee business expenses are generally not deductible on a federal return, which is a big reason employers reimburse instead. So the practical answer for most employees is to have the employer pay or reimburse the conference rather than expect a deduction. Confirm the specifics for your situation with a tax professional. Source: IRS Publication 463 (Travel, Gift, and Car Expenses) ↗.

Is mileage deductible for work travel?

Again, it turns on status. If you’re self-employed, business use of your car is deductible — either the IRS standard mileage rate or actual expenses — though your regular commute never is. If you’re a W-2 employee, unreimbursed mileage generally is not deductible federally under current law, which is why most employers reimburse business mileage directly (commonly at the IRS standard rate). Because the standard mileage rate changes yearly, don’t rely on a figure you saw once — check the current rate on the IRS site, and keep a contemporaneous log of business miles either way, since that record is what substantiates the deduction or the reimbursement. Source: IRS Publication 463 (car expenses & mileage) ↗.

Do I pay tax on reimbursed travel?

Usually not — if your employer reimburses business travel under what the IRS calls an accountable plan, the reimbursement is not taxable income and does not show up on your W-2. An accountable plan essentially requires that the expense had a business purpose, that you substantiate it with records (receipts, the business reason), and that you return any excess advance. If an employer instead just pays you a flat travel allowance with no substantiation and no requirement to return the excess (a non-accountable plan), those payments generally are taxable wages. Most corporate expense processes are built as accountable plans for exactly this reason. Keep your receipts and submit them properly, and reimbursed travel stays non-taxable. Source: IRS Publication 463 (accountable plans) ↗.

What travel receipts do I need for taxes?

Keep documentation that establishes the amount, date, place, and business purpose of each expense — that four-part record is the substance of what both the IRS and your employer’s accountable plan require. In practice: itemized receipts for lodging and for other expenses (the IRS has historically required receipts for lodging and for other costs at or above a $75 threshold, though keeping them for everything is the safer habit), plus a note of the business purpose and, for meals and entertainment, who was there and the business relationship. A contemporaneous log — kept at the time, not reconstructed later — is far stronger than a shoebox assembled at year-end. Keep the records for the period the IRS can examine a return; a tax professional can tell you how long that is for you. Source: IRS Publication 463 (recordkeeping) ↗.

What travel expenses can I write off?

For the self-employed, the deductible categories for a trip away from your tax home for business generally include transportation (flights, train, car), lodging, local transport (taxis, rideshare, rental car), baggage, and half of business meals, along with other ordinary and necessary trip costs — but not personal side-trip costs, and not lavish or extravagant amounts. Personal expenses, and the personal portion of a mixed business-and-personal trip, are not deductible, and travel that is primarily personal generally isn’t either. For W-2 employees, as above, unreimbursed versions of these generally aren’t deductible under current law — the route is employer reimbursement. Because the lines (tax home, primarily-business, meal rules) get technical fast, treat this as the map and get the specifics from IRS Publication 463 and a professional. Source: IRS Publication 463 ↗.

More answers for the road in the Field Guide.