Mileage Reimbursement for In-Home Behavioral Health Staff

Start with what federal law does not do.

Federal wage law sets no mileage rate for private employers, and no federal statute or regulation we found researching this guide requires reimbursement of employee mileage as such.

Treat that as a research conclusion, not a certificate of permission — the checks that matter next are your state's law and the federal rules that do bite.

The first is “free and clear.”

Under the FLSA, wages count only if paid free and clear, and the regulation's example is tools of the trade: when an employer requires an employee to supply their own tools, the employee's cost cannot cut into the minimum wage or overtime owed for any workweek.

The regulation's named example is tools.

The same logic is commonly read to cover the cost of driving a personal car for work the employer requires — but that application is a reading of the rule, not its text, so the conservative move is to assume it applies to you.

For in-home staff the risk is concrete.

Federal rules count driving between clients' homes during the workday as hours worked — that is the drive time pay question, covered in its own guide — but the same trips put real car costs on the employee.

On the common reading of the free-and-clear rule, if required driving costs would push a minimum-wage paycheck below the floor for that week, the employer has an FLSA problem — and a violation for underpaid wages or overtime carries the unpaid amount plus an equal additional amount as liquidated damages.

Reimbursement also interacts with overtime.

Expense reimbursements that reasonably approximate the actual expense are excluded from the regular rate used to compute overtime; any disproportionately large excess is included.

DOL draws the safe line for you: a travel reimbursement is per se reasonable — never disproportionately large — when it does not exceed the federal travel regulation or IRS guidance amounts for that type of expense.

One boundary to respect: a payment that reimburses ordinary commuting costs is not an excludable expense reimbursement at all, and must be included in the regular rate.

Whether you must reimburse is decided state by state.

The states whose requirements this guide builds on are California, Illinois, Iowa, New Hampshire and Massachusetts — not an exhaustive survey of every state's wage laws, so confirm your own state with your labor department or employment counsel before assuming nothing is owed.

The mandates come in two shapes.

California, Illinois, Iowa and New Hampshire require reimbursement of necessary job expenses as such; Massachusetts attaches to directed travel instead — pay the travel time and reimburse the transportation expenses.

Two California details trip up employers who write one national policy.

Labor Code 2802 reaches past mileage: it covers all necessary expenditures or losses incurred in direct consequence of the discharge of duties, and the Labor Commissioner has said the costs of insurance an employer requires are recoverable under it.

And California employees cannot waive their 2802 reimbursement rights by private agreement, so a waiver clause in an offer letter or handbook does not do what it says.

Folding the reimbursement into salary instead of paying it separately?

The California Supreme Court allows that only where the employer provides a method or formula identifying how much of the pay is expense reimbursement — Gattuso v. Harte-Hanks Shoppers (2007).

A vague “we pay above market to cover your driving” identifies no portion of anything.

The IRS standard mileage rate is the number to build around.

For 2026 there are two of them, not one: 72.5 cents per mile for January 1 through June 30, 2026, and 76 cents per mile for July 1 through December 31, 2026, after a mid-year increase the IRS announced in IR-2026-29.

The 2025 business rate was 70 cents per mile.

A policy or offer letter that quotes a single “2026 rate” is wrong on its face, and one written in the spring goes stale on July 1.

The IRS rate is useful because the systems you answer to treat it as the benchmark: DOL treats a travel reimbursement that does not exceed the federal travel regulation or IRS guidance amounts for that type of expense as per se reasonable for regular-rate purposes, and California's Labor Commissioner has said use of the IRS mileage allowance satisfies the 2802 obligation for an employee's car use, absent evidence to the contrary.

DOL's per se safe line stops at those amounts.

Above them, a reimbursement stays out of the regular rate only while it reasonably approximates the actual expense, and a disproportionately large amount has to be included in overtime calculations.

On the tax side, the IRS counts mileage as accounted for when the reimbursement does not exceed the federal rate — the accountable-plan rules below cover the rest.

The tax treatment follows the plan, not the payment.

Under IRS rules, an accountable plan has three requirements: the employee must have incurred the expenses while working for you, must substantiate them within a reasonable time, and must return any excess within a reasonable time.

The IRS generally treats substantiation within 60 days and return of excess within 120 days after the expense was paid or incurred as reasonable.

Amounts paid under an accountable plan are not wages: no income tax withholding, no Social Security, no Medicare, no FUTA.

Mileage reimbursed at no more than the federal rate counts as accounted for automatically — though the employee still has to substantiate the business miles driven and the business purpose, which is what the mileage log is for.

The flat-allowance version is different.

A flat car allowance paid regardless of whether the employee has business expenses — or a reimbursement that would otherwise have been paid as wages — is a nonaccountable plan, and the payments are taxable wages, withholding and payroll taxes included.

A mileage policy is one page if you write the decisions down:

• Who it covers. Every employee your schedule sends out to clients in a personal car — behavior technicians, case managers, family therapists, anyone whose route you set.
• Which miles. Pay the miles the schedule creates: client to client, plus any detour the job requires. The commute — home to the first client, last client to home — is a line to draw deliberately and write down, not one to assume is safe everywhere: Massachusetts, for one, owes an employee required to report somewhere other than their usual location the travel time beyond an ordinary commute plus the transportation expenses.
• If you pay commute miles anyway. The FLSA does not treat a payment that reimburses ordinary commuting as an excludable expense reimbursement; it goes into the regular rate for overtime.
• The rate, with dates. Name the rate and its effective dates, and name who updates the policy when the IRS revises the rate mid-year, as in 2026.
• Substantiation. The IRS expects the employee to substantiate the business miles driven and the business purpose even when the reimbursement is at or below the federal rate — a log with the date, the sites, the purpose and the miles carries that — and it is what makes the accountable plan work.
• Timing. Set a submission deadline and a payment schedule your pay cycle can meet. Illinois, Iowa and New Hampshire each write 30-day mechanics into their rules, and the IRS's reasonable-time benchmarks are 60 and 120 days.
• Method. Pay reimbursement separately from wages. In California, folding it into salary or commission requires a stated method or formula identifying the reimbursement portion.
• Waivers, refused. Do not ask staff to sign away reimbursement. California employees cannot waive Labor Code 2802 rights by private agreement, and a waiver clause elsewhere just creates the fight you do not want.

Mileage policy answers who pays for the miles.

Insurance answers who pays for the crash, and it deserves an answer before the first client visit, not after the first claim.

Two conversations cover it.

One with your broker: how does your coverage respond when a staff member drives a personal car on client visits, and does a hired and non-owned auto endorsement fit the way your program runs?

One with each employee, about their own policy and what the job requires of it.

If you require staff to carry higher liability limits or business-use coverage as a condition of the job, you have made that a job cost.

California's Labor Commissioner has said the costs of insurance an employer requires are recoverable under Labor Code 2802, so a required coverage upgrade there is a reimbursable expenditure; elsewhere, ask employment counsel how a required upgrade is treated before it goes in the offer letter.

Write the expectation down the same way you write the mileage rate: what coverage the role requires, who verifies it and how often, and what the reimbursement covers.

Mileage and insurance are both cost lines that come with a distributed clinical workforce; the behavioral health hiring hub collects the employer guides that cover the rest.