The 2027 Transit and Parking Benefit Limit Is Already $350

Open enrollment for 2027 is landing on a lot of calendars right now, and the commuter benefits election is usually the one employees skip past fastest: pick a transit amount, pick a parking amount, move on. What most people entering that number don’t realize is that the number itself is not actually a mystery. The short answer: the 2027 monthly exclusion for transit and vanpool combined, and the separate monthly exclusion for qualified parking, are both projected at $350 — up from $340 in 2026 — and the Bureau of Labor Statistics has already published the last piece of data the formula needs. The IRS just hasn’t said so yet.

The statute and the rounding

Qualified transportation fringe benefits are defined in 26 U.S.C. § 132(f)(1): transportation in a commuter highway vehicle between home and work, any transit pass, and qualified parking. Section 132(f)(2) caps the exclusion at $175 a month for the first two categories combined — the vehicle and the transit pass share one ceiling — and a separate $175 a month for qualified parking. Those are the statutory base amounts, and they don’t move on their own; section 132(f)(6) is what adjusts them for inflation, using the cost-of-living formula in section 1(f)(3) with “calendar year 1997” substituted for “calendar year 2016.” Any increase that isn’t already a multiple of $5 gets rounded down to the next lowest multiple of $5.

That formula runs on a specific twelve-month window: the average of the chained CPI-U for all urban consumers over the twelve months ending August 31 of the prior year. It is the identical window that sets the federal income tax brackets and the standard deduction each fall, which this site’s 2027 IRS inflation adjustments tracker follows in full. The August 2026 reading — the twelfth and final month that window needs — came in at 185.739 on the chained CPI-U index, published by the Bureau of Labor Statistics on September 11, 2026. Once that number lands, the transit and parking calculation has everything it requires. The IRS’s own publication of the result is a separate, later step, not a prerequisite for knowing what the result will be.

Checking the method against 2026

Before trusting any formula to project a number the IRS hasn’t announced, it should first reproduce a number the IRS already has announced. For 2026, Revenue Procedure 2025-32, section 4.16, set the transit-and-vehicle limit and the qualified parking limit at $340 a month each. Both categories start from the identical $175 statutory base, so they move in lockstep every year. Run the same cost-of-living mechanics that produce the 2027 figures below against the confirmed 2026 window, and the result matches: a single window average, in the range of 177.1105 to 177.1135, reproduces all eighteen figures tested from that revenue procedure, transit and parking limits included. That is the same mechanism doing the work here, not a different one built to fit a target.

Why October 2025 doesn’t matter here

There is one genuine complication sitting inside the August 2026 window, and it’s worth naming directly instead of glossing over it. The Bureau of Labor Statistics never published a CPI-U reading for October 2025, because data collection stopped during that year’s government shutdown. Anyone reconstructing the twelve-month average has to pick one of two approaches: average the eleven months that do exist, or fill the gap with an imputed estimate for the missing month.

For the transit and parking limits, it turns out not to matter which choice the IRS makes. Averaging the eleven published months produces an unrounded figure of $352.10. Imputing the missing October reading instead produces $351.70. Those two numbers are about forty cents apart — and both of them round down to $350 under the statute’s rule that any increase not already a multiple of $5 gets rounded down to the next lowest multiple of $5. The ambiguity over October 2025 is real, and it does move some other 2027 figures elsewhere in the tax code by one rounding step, from $50 on a bracket threshold to $1,000 on a Medicare surcharge tier. This one just isn’t close enough to that line to flip.

What $350 is worth: a worked example

The dollar value of the exclusion is best seen filled out for a specific filer. Take an employee in the 22% federal income tax bracket who elects the full $350 a month in transit benefits for all twelve months of 2027. That’s $4,200 excluded from wages for the year. At a 22% marginal rate, that’s $924 in federal income tax avoided. Because qualified transportation fringe benefits are also excluded from Social Security and Medicare wages, not just income tax wages, the same $4,200 avoids 7.65% in FICA tax as well: $321.30. Add the two together and the annual value of the transit election alone is $1,245.30.

If that same employee also elects the full $350 a month in qualified parking — a separate bucket, not shared with the transit cap — the numbers simply double: $8,400 excluded for the year, $2,490.60 saved between federal income tax and FICA combined. Both figures ignore any state income tax effect, which varies by state and isn’t part of this calculation, and both assume the employee’s wages stay below the Social Security wage base for the year; above that threshold, the FICA savings would be smaller because the Social Security portion no longer applies to additional wages.

Any amount an employee elects above the monthly limit doesn’t disappear — it’s simply added back to taxable wages, subject to income tax and FICA like any other paycheck dollar. The exclusion only shelters dollars up to the cap.

What’s covered, and what isn’t

Two of the three categories in section 132(f)(1) share one combined cap, and the third stands alone. Transit passes and commuter highway vehicle transportation both draw from the same $175 base, projected at $350 for 2027 — an employee using both a vanpool and a transit pass in the same month doesn’t get two exclusions, just one shared ceiling. A commuter highway vehicle, for this purpose, means a vehicle seating at least 6 adults not counting the driver, where at least 80% of the vehicle’s mileage is reasonably expected to be for commuting with at least half the seats filled — the definition Congress wrote to distinguish an actual vanpool from an ordinary carpool.

Qualified parking is entirely separate, with its own $175 base and its own projected $350 figure for 2027. An employee can max out both the combined transit-and-vehicle exclusion and the parking exclusion in the same month, which is exactly the $8,400-a-year combined scenario in the worked example above.

What used to be a fourth category no longer exists at all. The qualified bicycle commuting reimbursement — formerly its own provision at section 132(f)(1)(D), worth up to $20 a month — was suspended for tax years 2018 through 2025 by the 2017 tax law, and then struck from the code permanently by section 70112 of Public Law 119-21, the 2025 tax law known as the One Big Beautiful Bill Act. There is no bicycle benefit to elect in 2026, in 2027, or in any year after that; an employer that still reimburses an employee’s biking costs is handing over ordinary taxable wages, not a fringe benefit.

None of this requires the employer to actually cut a check for these benefits directly. Section 132(f)(4) provides that there’s no constructive receipt problem when an employee is offered a choice between the qualified transportation fringe and cash compensation — which is the specific statutory permission that makes pre-tax salary-reduction commuter benefit programs legal in the first place. An employee electing $350 a month in transit benefits through payroll is, mechanically, redirecting $350 of salary before it’s taxed, not receiving a separate employer-funded perk.

The employer side

The benefit to the employee doesn’t carry the same benefit to the employer. Since the 2017 tax law took effect, 26 U.S.C. § 274(a) has disallowed the employer’s own income tax deduction for the cost of providing qualified transportation fringe benefits — the statute is explicit enough that its own section heading reads “Entertainment, amusement, recreation, or qualified transportation fringes,” putting commuter benefits in the same nondeductible group as entertainment. None of that changes the employee’s side: the exclusion under section 132(f) applies whether or not the employer can deduct the cost, and the 2027 limit an employee can elect is the same $350 either way. How the disallowance lands on a particular program, and whether it is funded by salary reduction or by an employer subsidy, is a question for the employer’s own tax adviser rather than something an employee needs to settle before choosing an amount.

The calendar from here

The IRS confirmed the 2026 transit and parking figures in Revenue Procedure 2025-32, issued October 9, 2025. There’s no announced date yet for the 2027 revenue procedure, but the same office has historically issued it in the same window, roughly mid-October through November of the preceding year. Until it’s published, many employer payroll systems keep running on the prior year’s confirmed limit by default, which means an employee who sets a January 2027 transit election at $340 — because that’s the number the system still shows — may need to go back in and raise it to $350 once the official figure is loaded. Watch this site’s IRS 2027 inflation adjustments tracker for the revenue procedure itself, alongside the parallel projections for the 2027 FSA contribution limit and the 2027 HSA contribution limits, which are indexed on their own separate schedules and shouldn’t be confused with this one. One more open-enrollment benefit does share this exact window: the cap on tax-free employer tuition and student loan payments, frozen at $5,250 since 1986 and indexed for the first time to a projected $5,400 for 2027. At year-end, the excluded transit and parking amounts do not get a code of their own on the W-2. They are simply left out of the wage totals in boxes 1, 3 and 5, which is why they are missing from this site’s W-2 Box 12 codes list.

Sources

• 26 U.S.C. § 132 — law.cornell.edu/uscode/text/26/132
• 26 U.S.C. § 274 — law.cornell.edu/uscode/text/26/274
• 26 U.S.C. § 1(f)(3) — law.cornell.edu/uscode/text/26/1
• Rev. Proc. 2025-32, § 4.16 (2026 qualified transportation fringe limits) — irs.gov/pub/irs-drop/rp-25-32.pdf
• Public Law 119-21, § 70112 (permanent repeal of the bicycle commuting reimbursement), as reflected in the Legal Information Institute’s amendment notes to 26 U.S.C. § 132
• Bureau of Labor Statistics, Chained CPI-U series SUUR0000SA0 — api.bls.gov/publicAPI/v2/timeseries/data/
• finbarrow, IRS 2027 inflation adjustments tracker — companion page for the shared CPI window