Mid-Year Mileage Math: The IRS Just Revised the 2026 Standard Mileage Rates
If you drive for work, keep an eye on the calendar — because this year, the number you multiply your miles by changed halfway through. Thanks to a recent climb in fuel prices, the IRS has revised the 2026 standard mileage rates for any travel on or after July 1, 2026. That means the rate you used for a client visit in May is not the rate you'll use for the same trip in August, and if you (or your bookkeeper) aren't tracking that split, your deduction could end up smaller — or messier — than it needs to be.
We know, we know. "The mileage rate changed mid-year" is not exactly the plot twist anyone was hoping for. But this is the kind of small, easy-to-miss detail that trips people up at tax time, so let's walk through exactly what changed, who it affects, how to handle the split, and a few related mileage questions we get all the time — before December sneaks up.
First, a quick refresher on what the standard mileage rate even is
If you use your personal vehicle for business, medical, charitable, or certain moving purposes, the IRS gives you two ways to deduct those costs. You can track every actual expense — gas, oil, repairs, insurance, tires, registration, depreciation, the works — or you can skip the shoebox of receipts and simply multiply your qualifying miles by a set per-mile rate. That per-mile shortcut is the standard mileage rate, and for a lot of small business owners and solopreneurs, it's the far simpler path.
The rate is designed to bundle all those vehicle costs into one tidy number, which is why it moves when the big underlying costs move. Normally the IRS sets these rates once a year and leaves them alone. Every so often, though, when fuel costs shift sharply, the agency steps in and adjusts them partway through the year. That's precisely what happened here, which is why 2026 now comes in two halves.
What changed on July 1, 2026
Here's the headline: the previously released 2026 rates still apply to travel on or after January 1, 2026, and before July 1, 2026. For travel on or after July 1, the revised 2026 standard mileage rates take over. Same tax year, two different rate periods.
The updated numbers break down like this:
Business: 76 cents per mile for July 1 through the end of the year, up from 72.5 cents for the first six months. (One helpful detail for anyone tracking vehicle basis: the depreciation portion of the business rate stays at 35 cents per mile for the entire year, first half and second half alike.)
Medical and moving: 23.5 cents per mile starting July 1, up from 20.5 cents for the first half of the year. Keep in mind the moving piece applies only in limited situations, so check whether it's relevant to you before you count on it.
Charitable: 14 cents per mile — unchanged, as it has been for years. This one doesn't budge with fuel prices because it's set by Congress, not the IRS.
So two of the three rates jumped, one held steady, and the whole thing hinges on which side of July 1 your trip landed on.
A quick example, because numbers help
Say you're a solopreneur who drove 6,000 business miles in 2026 — 3,000 in the first half of the year and 3,000 in the second half. Under the old single-rate way of thinking, you might be tempted to just multiply 6,000 by one number and call it a day. But with the mid-year change, the math looks like this:
January through June: 3,000 miles × 72.5 cents = $2,175
July through December: 3,000 miles × 76 cents = $2,280
Total business mileage deduction: $4,455
If you had mistakenly run all 6,000 miles at the old 72.5-cent rate, you'd have claimed $4,350 — leaving about $105 on the table. Not life-changing on its own, but multiply that gap across a heavier driver, or across a firm's worth of clients, and it adds up fast. The point is simple: splitting the year isn't just a compliance chore, it's how you make sure you claim everything you've actually earned.
Why you now need two sets of mileage numbers
This is the part we really want you to circle in red. Because the rate changed on July 1, anyone using the standard mileage method for 2026 needs to keep two separate mileage totals for the year: one for January through June, and one for July through December. At tax time, each bucket gets multiplied by its own rate, and the results get added together.
If your mileage log already captures the date of every trip, you're in great shape — you can slice the year at June 30 without breaking a sweat. If your "log" is more of a rough estimate scribbled in a notebook (no judgment, we've seen it all), now is the moment to tighten it up. A clean, dated record of your business miles is the single best thing you can do to protect this deduction, revised rates or not.
A few practical tips to make the split painless:
Log the date with every trip, not just the miles. Date is what determines which rate applies.
Reconcile at June 30 and December 31. Running a mid-year and a year-end tally keeps the two rate periods cleanly separated.
Lean on your tools. Most mileage-tracking apps timestamp every drive automatically, which makes the mid-year split a non-issue.
What the IRS actually wants to see in your records
Whichever method you use, the mileage deduction lives and dies by your recordkeeping. If your return is ever questioned, the IRS is looking for a log that's contemporaneous — meaning you recorded it at or near the time of the trip, not reconstructed from memory the following April. For each business trip, a solid record captures the date, the number of miles, where you went, and the business purpose ("drove to client site to review Q3 books," not just "work stuff").
You don't need anything fancy. A dedicated app, a spreadsheet, or even a consistent notebook in the glovebox can all do the job, as long as it's complete and kept up to date. What you want to avoid is the classic year-end scramble of guessing your annual mileage, which is exactly the kind of estimate that doesn't hold up well under scrutiny. Good records also make the new mid-year split effortless, since a dated log sorts itself into the two rate periods automatically.
Standard mileage or actual expenses? A quick gut check
Because the business rate went up, this is a natural moment to ask which method is even right for you. There's no universal answer — it depends on your vehicle and how you drive.
The standard mileage method tends to win for higher-mileage drivers with relatively efficient, inexpensive-to-run vehicles, and it's dramatically simpler to track. The actual expense method can come out ahead for pricier vehicles, heavy repair years, or lower-mileage drivers whose real costs per mile run high. A couple of rules are worth knowing before you pick: if you want the option to use the standard mileage rate on a car you own, you generally have to choose it in the first year the vehicle is available for business use, and if you lease a vehicle and start with the standard mileage rate, you typically must stick with it for the entire lease.
There's also a longer-term wrinkle worth flagging. That 35-cent-per-mile depreciation portion baked into the business rate quietly reduces your vehicle's tax basis over time. When you eventually sell or trade the vehicle, that lower basis can mean a larger taxable gain than you'd expect. It's not a reason to avoid the standard mileage method — it's just a reason to keep your cumulative business miles on record so the basis math is clean down the road.
Which miles actually count?
One of the most common (and most expensive) misunderstandings we see is what qualifies as a business mile in the first place. The drive from your home to your regular place of business is personal commuting, and commuting miles are not deductible — a rule that surprises a lot of first-time filers. Where it gets more favorable is travel between work locations: driving from your office to a client, from one job site to another, or to the bank, the post office, or a supplier for business errands generally counts.
If you have a qualifying home office that serves as your principal place of business, the calculus can shift, because trips from that home office to other work locations may count as business miles rather than commuting. It's a nuance that's easy to get wrong in either direction, so if a big chunk of your driving starts at home, it's worth a quick conversation to make sure you're classifying it correctly.
The reimbursement wrinkle for employers
If you reimburse employees for mileage, there's an extra kink worth flagging. Some employers may have already reimbursed their team for July travel at the old January–June rate, simply because the revised figure hadn't hit their radar yet. If that's you, you may want to go back and reimburse those employees the difference between the old and new rates.
Is that required? Under federal law, no — you're not obligated to true up the difference. But it's a goodwill gesture that's easy to make and genuinely appreciated, especially for employees who drive a lot and felt the same fuel-price pinch that prompted the IRS to act in the first place. If you decide to do it, document the adjustment clearly so your books reflect the corrected amount. And if you reimburse mileage regularly, it's worth making sure you're doing it through a proper accountable plan, so those reimbursements stay tax-free to your employees and cleanly deductible for the business.
A few questions we hear a lot
Do I have to use the new rate for the whole year? No — that's the whole point. The old rate applies to miles driven before July 1, and the new rate applies to miles driven on or after July 1.
What if I forgot to track the date on some trips? Do your best to reconstruct a reasonable, supportable record now while it's fresh, and tighten up your logging for the rest of the year. Going forward, a tracking app removes the guesswork entirely.
I'm an employee, not self-employed — does this help me? For employees, deducting unreimbursed mileage has been limited in recent years, so most employees rely on employer reimbursement instead. If you drive for work as an employee, the revised rate mainly matters for what your employer reimburses. When in doubt, ask us how your specific situation shakes out.
What this means for you (and your clients)
For most drivers, the revised 2026 standard mileage rates are good news — a higher business and medical rate means a bigger deduction per mile for the back half of the year. The only real "cost" is a little extra bookkeeping discipline to keep the two periods straight. Do that, and you capture every cent you're entitled to.
If you're a CPA or bookkeeper reading this, consider this your friendly nudge to reach out to clients who use the standard mileage method before year-end. A quick note reminding them to separate their January–June and July–December miles will save everyone a headache come filing season — and it's the kind of proactive touch that clients remember.
And if you're a business owner or solopreneur who just realized your mileage tracking has been running on vibes, don't panic. There's still time to reconstruct a reasonable, dated record for the year and set yourself up cleanly for the months ahead.
Let's make sure your miles work as hard as you do
Mid-year rate changes are exactly the sort of small-but-important detail that's easy to overlook when you're busy running a business. That's what we're here for. Whether you want help sorting your mileage into the right periods, deciding between the standard mileage and actual expense methods, or handling employee reimbursements the smart way, we'd love to take it off your plate.
Book your free, zero-pressure consultation today, and let our friendly "tax nerds" help you drive into tax season with confidence — and every mile accounted for.
Rates reflect IRS Announcement 2026-11.
