Fair Car Allowance Calculator
A fair car allowance is what it actually costs to run your vehicle for work, and in 2026 the IRS changed the answer halfway through the year: 72.5 cents a mile for January through June, then 76 cents from July onward. Most online calculators still use a single stale rate and get the math wrong. This calculator splits your miles across the two 2026 periods, handles business, medical, and charitable rates, and supports three methods: the IRS standard rate, a custom employer rate (with the taxable portion flagged), and FAVR fixed-plus-variable plans. If you drive for work, compare the result against your true cost per mile to see whether the allowance actually covers your costs.
Estimate only, not tax advice. Confirm eligibility and record-keeping rules with your tax preparer.
Quick Answer
For 2026, business miles are worth 72.5 cents each from January through June and 76 cents each from July through December. For example, 6,000 business miles in each half gives 6,000 x $0.725 + 6,000 x $0.76 = $8,910 for the year, or $742.50 a month. A calculator using one flat rate for all of 2026 gets this wrong.
Key takeaways
- 2026 has two business rates, not one: 72.5 cents for January to June, 76 cents from July onward.
- The same 10,000 miles are worth $7,250 in the first half and $7,600 in the second: date your mileage log.
- Reimbursements above the IRS rate are taxable wages, not tax-free allowances.
- For most drivers doing real miles, the standard rate often produces the larger deduction and is far simpler.
- Quick Answer
- Worked example, verified against the tool
- The 2026 mid-year rate change
- How the allowance is calculated
- 2026 IRS rates and recent history
- Standard mileage versus actual expenses
- FAVR and fixed allowances
- Record-keeping the IRS accepts
- What competing calculators get wrong
- Frequently asked questions
- Add This Calculator to Your Website
- References
Worked example, verified against the tool
Business purpose, 6,000 miles January through June 2026 and 6,000 miles July through December, IRS standard method: first half 6,000 x $0.725 = $4,350; second half 6,000 x $0.76 = $4,560; total $8,910.00, or $742.50 a month. Enter these inputs above and the tool returns exactly these figures.
The 2026 mid-year rate change
The IRS normally sets the standard mileage rate once a year each December. For 2026 it made a rare mid-year adjustment, the first since 2022, citing rising fuel and vehicle operating costs. Announcement 2026-11 raised the business rate from 72.5 to 76 cents effective July 1, and the medical rate from 20.5 to 23.5 cents. The charitable rate stayed at 14 cents because Congress sets it by statute.
This matters more than it looks. If your mileage log records only an annual total with no dates, your preparer must estimate the split, which is exactly the kind of guess the IRS pushes back on. Log dates with every trip and the split takes care of itself. The calculator accepts separate half-year totals for precisely this reason.
How the allowance is calculated
The standard-rate math is simple: (January to June miles x 72.5 cents) + (July to December miles x 76 cents) for business use. The rate stands in for the full cost of running the car: gas, maintenance, insurance, depreciation, and repairs. That is why you do not add fuel or insurance on top; the rate already includes them.
Custom employer rates work the same way with your rate substituted, except the IRS draws a line: amounts above the standard rate are taxable wages. A 70-cent employer rate on 10,000 business miles is fully tax-free (it sits under the standard equivalent), but an 85-cent rate creates a taxable excess. FAVR plans split the difference structurally: a fixed monthly payment for ownership costs (insurance, depreciation, registration) plus a variable per-mile rate for operating costs (fuel, tires, maintenance).
2026 IRS rates and recent history
| Period | Business | Medical / moving | Charitable |
|---|---|---|---|
| 2026, Jan-Jun | 72.5c | 20.5c | 14c |
| 2026, Jul-Dec | 76c | 23.5c | 14c |
| 2025 | 70c | 21c | 14c |
| 2024 | 67c | 21c | 14c |
| 2023 | 65.5c | 22c | 14c |
| 2022, Jul-Dec | 62.5c | 22c | 14c |
| 2022, Jan-Jun | 58.5c | 18c | 14c |
Sources: IRS announcements IR-2025-128 (initial 2026 rates) and Announcement 2026-11 (mid-year change); historical releases IR-2024-312, IR-2023-239, IR-2022-234, IR-2022-124.
Standard mileage versus actual expenses
Simple, usually wins
- One multiplication per trip
- No receipt hoarding for the car
- Better for most high-mileage drivers
- Must be chosen in the car’s first business year to keep the option open
Precise, heavy paperwork
- Deduct the business share of every cost
- Can win for expensive cars driven few miles
- Requires tracking gas, repairs, insurance, depreciation
- Depreciation limits still apply
For gig drivers and road warriors putting real miles on a personal car, the standard rate often produces the larger deduction with a fraction of the paperwork. Actual expenses only pull ahead for costly vehicles driven modest business miles. If your true per-mile cost is well under the IRS rate, the standard rate is effectively a bonus; check it with a per-mile cost breakdown for your car (for a Tesla, the Tesla cost-per-mile calculator shows the same method).
FAVR and fixed allowances
FAVR (fixed and variable rate) plans suit employers with high-mileage staff: the fixed monthly component covers costs that do not change with miles (insurance, depreciation, registration, taxes), while the variable per-mile rate covers costs that do (fuel, maintenance, tires). A flat monthly car allowance with no mileage basis, by contrast, is fully taxable wages. The IRS publishes detailed FAVR rules each year capping the fixed and variable amounts; plans exceeding the caps lose their tax-free status for the excess.
Record-keeping the IRS accepts
A compliant mileage log records four things per trip: the date, the destination, the business purpose, and the miles driven. Odometer readings at the start and end of the year anchor the total. Apps that capture this automatically beat paper logs, but a notebook in the glove box works if you are consistent. Keep the log with your tax records; in an audit, a reconstructed log built months later carries little weight. And for 2026 specifically, those dates decide which of the two rates each mile earns. Regular commuting does not qualify at all: if part of your driving is the daily trip to a regular office, keep it separate with a commute expense estimate so it never mixes into deductible business miles. Publication 463 is the IRS reference for what counts as adequate substantiation: Publication 463: travel, gift, and car expenses.
What competing calculators get wrong
Nearly every mileage calculator on the web still applies a single 2026 rate, usually a stale estimate made before the mid-year change, which underpays second-half miles by 3.5 cents each. On 10,000 second-half miles that is $350 left on the table. None of the top results does all three in one tool: the half-year split, a taxable-excess flag on custom rates, and a FAVR model. This page does all three, with the rate table and sources to prove the numbers. One top-ranked page even contradicts itself: its text quotes the 76-cent second-half rate while its own calculator still computes at the stale 70-cent 2025 rate.
Frequently asked questions
For business driving, 72.5 cents a mile for January through June 2026 and 76 cents a mile from July through December. Medical and eligible moving miles are 20.5 then 23.5 cents; charitable miles are 14 cents all year. Employers may use these rates or set their own.
Multiply your qualifying miles by the rate in effect when you drove them. For 2026 business miles: (Jan-Jun miles x $0.725) + (Jul-Dec miles x $0.76). The calculator above does this split automatically.
Rising fuel and vehicle operating costs. The IRS announced the increase in Announcement 2026-11, the first mid-year adjustment since 2022. The business rate rose from 72.5 to 76 cents effective July 1, 2026.
Not up to the IRS standard rate under an accountable plan with proper records. Amounts above the standard rate are taxable wages. Flat monthly allowances not tied to miles driven are also taxable.
Standard mileage wins for most drivers who put real miles on a personal car: simpler and usually larger. Actual expenses can win for expensive cars driven few business miles. You must choose standard in the car’s first business year to preserve the option of switching later.
Fixed and Variable Rate: a monthly fixed payment for ownership costs (insurance, depreciation, registration) plus a per-mile variable payment for operating costs (fuel, maintenance, tires). Best for high-mileage employees; the IRS caps both components yearly.
Date, destination, business purpose, and miles for each trip, plus odometer readings at the start and end of the year. Keep the log with your tax records. For 2026, the dates also determine which of the two rates applies to each mile.
No. Regular commuting between home and a regular workplace is never deductible or reimbursable as business mileage. Driving between work sites, to clients, or to a temporary workplace generally qualifies.
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References
- Internal Revenue Service. Standard mileage rates, including the 2026 mid-year change (Accessed Oct 25, 2026).
- Internal Revenue Service. Topic 510: business use of a car (Accessed Oct 25, 2026).
- Internal Revenue Service. Publication 463: travel, gift, and car expenses (Accessed Oct 25, 2026).
- Internal Revenue Service. Publication 15: employer's tax guide (Accessed Oct 25, 2026).
- Internal Revenue Service. Publication 15-B: employer's tax guide to fringe benefits (Accessed Oct 25, 2026).
- Internal Revenue Service. Topic 511: business travel expenses (Accessed Oct 25, 2026).
- Internal Revenue Service. Publication 583: starting a business and keeping records (Accessed Oct 25, 2026).
- Internal Revenue Service. Publication 525: taxable and nontaxable income (Accessed Oct 25, 2026).
- Internal Revenue Service. Internal Revenue Bulletin 2026-29, Announcement 2026-11 (mid-year standard mileage rates) (Accessed Oct 25, 2026).
- Internal Revenue Service. Revenue Procedure 2019-46 (standard mileage rate rules) (Accessed Oct 25, 2026).