Mileage Tracking for Contractors: Turn Every Drive Into a Real Tax Deduction

If you drive a truck or van for work, you already know miles add up fast between the supply house, the job site, and back home. What most tradespeople don't realize is how much of that driving is quietly worth money at tax time — and how often it goes uncounted because nobody wrote it down.

The IRS lets you deduct business mileage at a set rate per mile, no receipts for gas or oil changes required if you use the standard method. But there's a catch: you have to have a real log. Not a guess in April, not "probably around 8,000 miles." A record of actual trips — where you went, why, and how far. Without that log, the deduction is a good idea you never actually get to use.

What the Mileage tool in your Vendor Portal actually does

LocalFixx's Mileage tool (Vendor Portal → Mileage, available on Pro and Elite tiers) is built to make that log something you'll actually keep, instead of a spreadsheet you abandon in February. Here's what it does:

• Logs each business trip with a start point, end point, and purpose (job site visit, supply run, or other).
• Lets you optionally link a trip to the specific job it was for, so your mileage and your job history line up.
• Calculates the tax-deductible amount automatically using the current IRS standard mileage rate — you never have to look up the rate or do the math yourself.
• Feeds directly into the Reports (Tax/CPA) tool, where your total mileage deduction shows up on the Schedule C line where it belongs.

That last point is the part that actually saves you time. A lot of tradespeople keep mileage in one place (a notebook, a separate app) and their other business numbers somewhere else, then have to reconcile the two every year. When the mileage log and the tax report live in the same system, that reconciliation step disappears — the number is just already there when you need it.

How to actually use it, step by step

You don't need to change how you work to use this. The goal is to make logging a trip take less time than it took you to read this sentence.

1. Open Vendor Portal → Mileage before you head out, or right after you get back — whichever you'll actually remember to do.
2. Enter the trip: where you started, where you ended, and pick a purpose (job site visit, supply run, or other).
3. If the drive was for a specific job, link it. This isn't required, but it means your mileage log and your job records match up later, which is exactly what a CPA or an IRS inquiry wants to see.
4. Save it. The tool calculates the deductible amount for that trip automatically using the current IRS standard mileage rate — you'll see the dollar figure right next to the mileage.
5. Repeat for supply runs, estimate visits, and anything else that's business driving, not personal errands.

That's the whole workflow. No separate app to buy, no spreadsheet to maintain, no year-end scramble trying to remember how many times you drove to the same job in March. When tax season comes around, open Reports (Tax/CPA) and your mileage deduction is already sitting on the Schedule C line where your CPA needs it.

Why this matters more than it seems like it should

It's easy to think of mileage tracking as a minor bit of admin. It isn't, for two reasons: the money involved, and what happens if the IRS ever asks questions.

The money adds up faster than people expect

Vehicle costs are often one of the largest deductible expenses a self-employed tradesperson has, right alongside materials and labor. Every mile driven for business — to a job, to the supply house, to give an estimate — multiplies out at the IRS standard rate. Skip logging even a few trips a week and, over a year, that's real deduction left on the table for no reason other than nobody wrote it down.

A real log is what protects you if you're ever asked to prove it

The standard mileage deduction is one of the more commonly scrutinized areas on a self-employed return, precisely because a lot of people claim round numbers without backup. The IRS generally expects contemporaneous records — meaning logged close to when the trip happened, not reconstructed later from memory. A log with real dates, real trip purposes, and (where relevant) a linked job is exactly the kind of record that holds up. A guess written down in April, after the fact, is not.

How to think about vehicle deductions beyond just this tool

Whether or not you're using LocalFixx's Mileage tool, the underlying rules are worth understanding, because your vehicle is probably one of your biggest business costs whether you track it or not.

Standard mileage vs. actual expenses

The IRS generally gives you two ways to deduct vehicle costs, and you typically pick one method per vehicle:

• Standard mileage rate: multiply your business miles by the IRS's published rate for the year. Simple, and the main thing it requires from you is a clean log.
• Actual expenses: deduct the business-use percentage of gas, insurance, maintenance, registration, and depreciation or lease payments. More recordkeeping, and sometimes a larger deduction depending on your vehicle and how much you drive it.

There are rules about switching methods on a given vehicle in later years, so this is worth a conversation with a CPA before you lock in an approach, especially if you're financing or leasing a work vehicle.

What counts as a business mile (and what doesn't)

This trips up a lot of self-employed people. Ordinary commuting — driving from home to a regular fixed workplace — generally isn't deductible, the same as it isn't for a W-2 employee. But most trade work doesn't look like a regular commute:

• Driving from home to a job site is typically deductible if you don't have a separate fixed office or shop you'd otherwise be commuting to.
• Driving between job sites during the day is business mileage.
• Trips to the supply house, to pull permits, or to give an estimate are business mileage.
• A personal errand run in the middle of a business trip should be separated out, not folded into the deduction.

When it's ambiguous — home office setups and mixed-purpose trips especially — that's exactly the kind of question a CPA answers in five minutes that could otherwise cost you an inflated or understated deduction.

What a solid mileage record actually needs

Regardless of what tool you use, a defensible mileage log generally needs the same core pieces:

1. The date of the trip.
2. Where you started and where you ended.
3. The business purpose (job site, supply run, estimate, etc.).
4. The miles driven.
5. Ideally, which job or client the trip relates to, if there is one.

Logged close to the time you actually drove — not reconstructed from memory months later — is what separates a deduction that holds up from one that's a guess with a dollar sign on it.

Mileage is one piece of a bigger tax picture

Vehicle deductions don't exist in isolation. They sit alongside your other business expenses, your quarterly estimated tax payments, and whatever your CPA advises for your specific setup — LLC or sole proprietor, one truck or a small fleet, one state or several. Treat your mileage log as one input into that bigger picture, not the whole picture. The goal isn't just capturing every deductible mile; it's having numbers throughout the year that are accurate enough that tax season is a formality instead of a fire drill.

Make the miles you're already driving count

You're driving to these jobs regardless. The only question is whether that driving ends up as a real number on your tax return or as a vague sense that you "probably drive a lot." LocalFixx's Mileage tool, available on Pro and Elite plans, logs each trip with its purpose and an optional job link, calculates the deduction automatically at the current IRS rate, and sends the total straight to your Reports (Tax/CPA) Schedule C line — so the record is already built by the time you need it. If you're on LocalFixx and haven't opened Vendor Portal → Mileage yet, it takes less time to start a log than it did to read this article.

Related guides

Stop Dreading Tax Season: How LocalFixx's Reports Tool Turns Your Jobs Into CPA-Ready Books

Recurring Expenses: Stop Re-Entering the Same Bill Every Month

How to Log Cash Jobs and Side Work So Your Books (and the IRS) Actually Match Reality