New Mexico Mileage Reimbursement 2026: A One-Year Lag

New Mexico does not pay the federal figure in force when a trip happens. The regulation sets the state rate at 100% of the IRS business rate in force on January 1 of the previous year, so every calendar year is priced with the figure that was already a year old when it began.

The effect is that the state can print its figure twelve months ahead and never needs to revise it mid-year when the IRS moves. The cost is visible in 2026: the federal rate rose on July 1 and the executive-branch figure stayed at 70 cents.

The Department of Finance and Administration publishes a single rate calendar for the year, and it does not put every branch on the same number. Executive agencies, legislative agency employees, judicial agencies and district attorneys' offices all sit at the prior-year figure. Legislative members sit at the figure that was current when the year began, and the calendar gives them that one number for all twelve months rather than moving it in July.

Because the executive figure is the rate the IRS set on January 1 of the previous year, the 2027 figure is 72.5 cents a mile, which is what the IRS set on January 1, 2026. Nothing the IRS announces in December 2026 changes it, and no New Mexico instrument has to be issued for it to take effect.

That is unusual enough to say plainly. An employee planning 2027 travel for an executive agency can price it today. Legislative members are the exception, because their rate follows the current year, so their 2027 figure waits on the December announcement.

The Per Diem and Mileage Act says who it covers, and the regulation that carries out the Act says the same thing. It covers public officers and employees of state agencies and local public bodies. A private employer is outside both.

A private claim follows the employer's written policy. The state calendar is a useful reference for what a public body pays, and the lag means the reference is a year behind the federal figure a private policy may be following.

• Check which rate the employer names before applying the state figure.
• File within the employer's window; the state's two-week rule binds state claims only.

The Department of Finance and Administration publishes these figures. Public officers and employees of state agencies and local public bodies, whose mileage the Per Diem and Mileage Act governs.

The executive figure is the prior year's federal rate, so it is settled for a calendar year before that year starts.

Legislative members are paid the current year's federal rate instead, which is why two figures appear on one calendar.

The IRS moved the business standard mileage rate mid-year, so a 2026 trip prices by its date. This is the benchmark an employer's rate method usually follows.

The IRS has not published a standard mileage rate for 2027. Until it does, two things decide what a trip pays: the year you drove it and the date within that year. A 2026 trip pays 72.5 cents per mile through June 30 and 76 cents per mile from July 1. Miles driven from January 1, 2027 will use whatever figure the IRS publishes next.

The next year's rate has arrived in December in each of the last nine years, between December 14 and December 31. An announcement is not always the last word. The IRS raised the 2026 figure on July 1, halfway through the year, so a 2027 claim may need two rate periods.

A state that publishes a rate for its own travelers follows its own calendar, so it can publish the next period before the IRS does. A private employer's rate changes when its own policy changes, or when the benchmark that policy follows moves. It does not change because the calendar year turns.