The Vendor's Guide to Tracking Mileage for Tax Deductions

The deduction most vendors leave on the table

Ask a room full of craft-fair vendors what they deducted last year, and most will list booth fees, supplies, and maybe a chunk of their materials. Ask about mileage, and you get shrugs. That is a shame, because for a working vendor who drives to a dozen or more shows a year, mileage is often one of the single largest deductions available, and it is the one most people undercount or skip entirely.

The reason is simple: mileage is invisible. A booth fee comes with a receipt. A roll of shrink wrap shows up on a card statement. But the 90-mile round trip to a Saturday market leaves no paper trail unless you create one. If you do not write it down when it happens, it is gone, and you cannot honestly reconstruct it in April.

This post walks through why those miles matter, the two ways the IRS lets you claim vehicle costs, exactly which trips count, what records you are expected to keep, and how to capture all of it without turning your life into a spreadsheet. This is general education for vendors, not tax advice. Everyone's situation is different, so confirm the details with a tax professional before you file.

Two methods: standard mileage vs. actual expenses

The IRS gives you two ways to deduct business use of your vehicle, and you generally pick one per vehicle.

The standard mileage rate method is the one most vendors use. You track your business miles, then multiply them by the IRS standard mileage rate, which changes each year. That single rate is meant to cover gas, oil, maintenance, tires, insurance, and normal wear. You do not track those costs separately; you just need an accurate count of business miles. Because the rate is set annually, do not assume last year's number still applies. Look up the current IRS standard mileage rate before you calculate anything.

The actual expense method is the other option. Here you total up what your vehicle actually cost you for the year, including gas, repairs, insurance, registration, and depreciation, then deduct the business-use percentage of that total. It can produce a bigger deduction if you drive an expensive or thirsty vehicle, but it demands far more record-keeping, and once you make certain choices in the first year you use a vehicle, your future options can be limited.

For the typical vendor hauling a canopy and a few totes in a reliable car or van, the standard mileage rate is usually simpler and comes out fine. But notice that both methods start with the same thing: you have to know how many business miles you drove. That is the foundation. Get the mileage log right and either method is workable; skip it and neither one is.

Which trips actually count

This is where vendors leave money behind, because the deductible trips go well beyond the drive to the show itself. Business miles are the miles you drive for your vending business. In practice that includes a lot more than most people log.

• To and from every show. The round trip to each market, festival, or fair is deductible. Whether it is the local Bell Street Craft Market across town or a weekend haul three hours out to something like the Peddlers Village Fine Art & Craft Festival, those miles count.
• Supply runs. The trip to the craft store, the hardware store, the fabric shop, or the lumber yard to buy materials is a business trip.
• Post office and shipping. Dropping off online orders, mailing inventory, or picking up shipping supplies all count.
• Bank trips. Driving to deposit your show earnings or to grab a roll of quarters for making change is business mileage too.
• Other business errands. Meeting a wholesale customer, scouting a new venue, picking up your printed banners, or driving to pick up a booth display you bought all qualify.

A few things do not count. Your regular commute, if you have a separate day job, is personal. And if you run an errand that mixes personal and business stops, only the business portion is deductible. The safe habit is to treat every drive that exists because of your vending business as loggable, and let your records sort out the rest.

What the IRS actually expects you to keep

You do not need anything fancy, but you do need to be able to back up your number if anyone asks. For each business trip, the records the IRS looks for are straightforward: the date of the trip, the business purpose, and the miles driven. A note like "June 14, round trip to Riverside spring market, 84 miles" is exactly the kind of contemporaneous record that holds up.

"Contemporaneous" is the key word. A log written at or near the time of the trip carries far more weight than a number you estimate months later from memory. It is also wise to note your vehicle's odometer reading at the start and end of the year, so you can show total miles against business miles if the actual-expense percentage ever matters.

What does not hold up is a round guess. "I drove about 4,000 miles for shows" with nothing behind it is the kind of claim that falls apart under scrutiny. The vendors who never worry about this are the ones who logged each trip as it happened, so their total is just the sum of real, dated entries.

Simple ways to log your miles

The best mileage log is the one you will actually keep up. A few approaches that work:

• The glovebox notebook. A cheap pad in the car where you jot date, purpose, and odometer start/end before you pull out. Old-fashioned, but it works if you are disciplined.
• A phone note or spreadsheet. One row per trip. Easy to total at year-end, but only as good as your habit of opening it.
• A dedicated mileage app. Several apps track drives in the background using GPS. They are accurate, but they log every drive you take and leave you to sort business from personal later, which is its own chore.

All of these share the same weak point: they depend on you remembering to record something in the moment you are also loading a canopy, wrangling inventory, and getting on the road. Miss a few and your total quietly drifts low.

Let your event records do the work

Here is the shift that makes this painless. You are already tracking your shows somewhere, or you should be. If your event records know where each show was, they can figure the mileage for you.

That is how BoothBook handles it. Because you have already entered each event with its location, per-event mileage is captured automatically, tied to the specific show, with the date and purpose built in. There is no separate log to maintain and no drives to sort through afterward, because every mile is already attached to a real, dated event with a clear business reason. At tax time your show mileage is sitting there totaled instead of scattered across a notebook you half-filled.

You will still want to log the standalone trips your events do not cover, such as supply runs and post office drops, but the biggest and most-missed category, the driving to and from shows, takes care of itself. That is the difference between a deduction you estimate and one you can stand behind.

Put it to work this season

Mileage rewards the vendor who is organized, and it punishes the one who guesses. Decide on your method, look up the current IRS standard mileage rate rather than trusting an old figure, and start logging every business drive now instead of reconstructing later. Get in the habit of noting date, purpose, and miles for supply runs and errands, and let automatic per-event tracking cover the shows. Do that consistently and you will likely find your real deduction is larger than the number you have been guessing at, and you will have the records to prove it. As always, run your specific situation past a tax professional before you file.