The standard mileage rate almost never changes mid-year. It is set in the fall, published in a December notice, and left alone for twelve months so that payroll systems and expense software have a stable number to work from. That routine broke this summer, and anyone who drives for work, for medical care, or for a small side business is now dealing with two different rates inside one tax year.
Two rates went up, one is frozen by statute
Announcement 2026-11 modifies Notice 2026-10, the December guidance that set the 2026 rates. Effective for expenses paid or incurred on or after July 1, 2026, the business rate rises from 72.5 cents to 76 cents per mile, and the medical and moving rate rises from 20.5 cents to 23.5 cents per mile.
The charitable rate does not move. It stays at 14 cents, because that figure is fixed in the tax code itself at section 170(i) and the IRS has no authority to adjust it for inflation or fuel prices. That is why volunteers driving for a food bank have been claiming the same 14 cents for years while every other category climbs.
The agency was explicit about the reason for the change, attributing it to “recent increases in the price of fuel.” All other provisions of the December notice remain in effect.
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A warning about the IRS website itself
This is the rare case where the safest source is the dense PDF rather than the friendly web page. As of the end of July, two IRS.gov pages were still serving the old numbers: the “Standard mileage rates” page in the tax professionals section, whose table was last updated in December 2025 and stops at 2025, and a forms-and-publications page reviewed in February 2026 that still states 72.5 cents for business travel.
Neither page has been wrong on purpose; they simply have not been refreshed since the mid-year change. But a taxpayer or bookkeeper who checks the obvious page and copies 72.5 cents into a spreadsheet will understate a deduction for the entire second half of the year. The controlling document is Announcement 2026-11, published at page 49 of Internal Revenue Bulletin No. 2026-29, dated July 13, 2026.
What the change is worth in real dollars
The business increase of 3.5 cents per mile sounds trivial until it is multiplied by a realistic year. A contractor, real estate agent, home health aide, or rideshare driver logging 10,000 business miles in the second half of the year deducts $7,600 instead of $7,250 — a $350 difference in deductible expense. At a 22 percent marginal rate, that is roughly $77 in actual tax, before self-employment tax effects.
The medical and moving increase is smaller in absolute terms but proportionally larger, rising almost 15 percent from 20.5 to 23.5 cents. That rate is what taxpayers use for driving to and from medical appointments when they itemize and clear the threshold for medical expense deductions. For a retiree making frequent trips to a specialist or a dialysis center an hour away, the miles accumulate faster than most people track them — and this is precisely the population that stops keeping a log because the per-mile figure feels too small to bother with.
The recordkeeping problem the split rate creates
The practical burden of a mid-year change is not the arithmetic. It is that a single annual mileage total is now useless. Deductions have to be computed on two separate buckets: miles driven January through June at the old rates, and miles driven July onward at the new ones.
Anyone who has been tracking with a running odometer figure rather than dated entries has a reconstruction job ahead. The cleanest fix is to establish a July 1 baseline now, from whatever record exists — a service invoice, an oil change receipt, a photo of the dashboard, an app export — so that the second-half total can be computed cleanly at filing time rather than estimated.
Employers reimbursing at the standard rate face the mirror image of the same problem. A company still paying 72.5 cents after July 1 is under-reimbursing; the employee is absorbing 3.5 cents a mile out of pocket, and depending on the arrangement may have little recourse to claim it. Checking the reimbursement rate on a recent expense report is a two-minute task that occasionally returns real money.
Why a mid-year revision is a signal, not just a number
The IRS has made this kind of mid-year adjustment only rarely — the last was in 2022, under similar fuel-price conditions. The standard rate is meant to approximate the average cost of operating a vehicle, blending fuel, maintenance, insurance and depreciation, and the agency generally tolerates a fair amount of drift rather than disturbing the year.
Choosing to move it anyway is an acknowledgment that fuel costs pulled far enough from the December assumption to make the old figure unfair to taxpayers. For households, the useful takeaway is not the 3.5 cents by itself but what it implies about the rest of the driving budget: if the federal government’s own cost model needed a mid-year correction, the household transportation line probably does too.
This article was produced with AI assistance and reviewed by a human editor. Figures are linked to their primary sources; where a claim could not be verified from the public record, we say so.
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