1099 Contractor Mileage Recordkeeping: What to Require From Clients

Consultants, freelance designers, independent adjusters, and other non-platform 1099 contractors drive for work just as much as gig-platform drivers do, and their mileage records are usually weaker, because there is no app-generated tax summary prompting them to think about it at all. A short recordkeeping checklist in the engagement letter fixes most of this before tax season.

Source: IRS Publication 463, on the records self-employed individuals must keep to support a mileage deduction.

Why non-platform 1099 clients are the weakest link

A rideshare or delivery driver at least gets an annual tax summary from the platform that puts a mileage number in front of them, even an incomplete one. A consultant driving to client sites, an independent insurance adjuster inspecting properties, or a freelance photographer driving to shoots gets nothing like that. Nobody prompts them to think about mileage until their preparer asks, by which point the year is over and the log, if it exists, is being reconstructed rather than reviewed.

What to put in the engagement letter

• A mileage log kept contemporaneously, at or near the time of each drive, not compiled at year-end
• For each trip: date, starting and ending location, business purpose, and total miles
• Total annual mileage from an odometer reading at the start and end of the year
• Receipts for tolls and parking, which are deductible in addition to the standard mileage rate
• A note on which vehicles are used for the business, if more than one

Raising these requirements at intake makes the intake conversation with a new 1099 client more consequential than it might seem. A preparer who raises mileage tracking in the first meeting, before the client's first billable trip of the year, prevents a much harder conversation twelve months later about how to substantiate a year of driving with nothing but memory and a stack of gas receipts to work from. A non-platform contractor has no app-generated trip history to fall back on the way a gig-platform driver does, so the intake conversation is the only backstop.

The business-purpose trap for consultants specifically

A consultant's drive from home to a regular office is ordinary commuting, not deductible, the same as anyone else's. A drive from home directly to a client's site, when the consultant has no separate regular office, is a different question, tied to the home-office and temporary-work-location rules. Get this distinction right at intake, because consultants routinely assume all client-facing driving is automatically deductible, and it is not.

Set expectations for quarterly check-ins, not just an annual dump

A client who sends a mileage update every quarter gives you accurate numbers for estimated tax payments and catches gaps while the year is still fresh in their memory. A client who hands over a full year's driving in one April meeting is handing you a reconstruction project, whatever they call it.

What good looks like at year-end

A clean CSV or spreadsheet export, one row per trip, with the four required fields, plus a start and end odometer reading for the year. That is the standard to hold every non-platform 1099 client to, the same standard a well-run gig-driver record already meets by default.

Revisit the checklist at renewal, not just at onboarding

A recordkeeping requirement mentioned once in an engagement letter three years ago tends to fade from a client's attention. Bring it up again each renewal, especially for a client whose business has changed, a consultant who added a second regular client site, a freelancer who started covering a wider territory, since a change in driving pattern is exactly when an old, casual habit stops being good enough and the gap starts costing them real deduction dollars.

Should the engagement letter specify a particular app or method?

Recommend automatic GPS tracking as the easiest way to hit the contemporaneous standard without effort, but the requirement is the four data points per trip, not a specific product.

What if a client refuses to keep a log?

Document that refusal in your file and prepare the return with the deduction limited to what other evidence supports, or omitted entirely if nothing substantiates it. Do not claim a mileage figure with no backing behind it because the client insists it is accurate.

Do tolls and parking need their own separate log?

A dated receipt is enough for tolls and parking; they do not need the same trip-level detail as mileage, but keep them organized by date so they can be matched to the mileage log if ever questioned.

What if the client switches between two personal vehicles for client visits?

Ask which vehicle was used on each trip and log it as a field on the same spreadsheet or app entry. A client using one vehicle for local visits and another for longer trips still needs one combined mileage record, not two separate untracked habits that never get reconciled at year-end.

Point every non-platform 1099 client to automatic tracking at intake, before their first business trip of the year, not after it. Try TruMile →

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