The 2027 brackets arrive early; the calendar is the edge

Bloomberg Tax & Accounting has released projected 2027 federal income tax rates months before the IRS publishes its official figures, and the inflation adjustment behind those early numbers is larger this year than last—3.2% from 2026, against 2.7% a year earlier. All seven brackets rise with the indexing, and the early timing is the part worth planning around.

Married couples filing jointly would see the 22% bracket top out at a projected $218,250, up from $211,400 in 2026, and the 24% ceiling at $416,650 against $403,550, while the top 37% rate starts above $793,650 rather than $768,700. For single filers, the 22% band ends at $109,125 and the 37% threshold begins at $661,375, against $105,700 and $640,600 under 2026 figures; the standard deduction for joint filers climbs $1,700 to $33,200 from $31,500, the line that decides whether a client itemizes at all.

Because the projections land before the IRS publishes, the practical value sits in the timing, which Evan Croen, who heads Bloomberg Tax & Accounting, describes as shortening the distance between having the numbers and acting on them. For an advisory practice, that distance is measured in the calendar year: Roth conversion sizing, year-end income timing, and standard deduction planning all get settled in the fourth quarter, often at the last minute, and an advisor holding projected brackets in September can run client scenarios while room remains to change behavior.

The table matters mostly for the lead time it buys, and that lead time comes with one caveat worth saying out loud in client meetings. Because the Bureau of Labor Statistics did not report October 2025 data, Bloomberg Tax's chained Consumer Price Index calculation for this cycle rests on an 11-month average rather than the usual 12; the firm flagged the gap as unusual and stood by the projections. Presenting projected brackets to clients as settled borrows a disclosure risk that costs nothing to avoid.

The wider brackets work in clients' favor when income grows modestly with inflation, since less of a raise gets pushed into the next rate, which makes the client conversation this fall mostly housekeeping: re-run withholding, right-size the conversion, and check whether the larger standard deduction moves anyone across the itemization threshold. Bloomberg Tax also incorporated adjustments from the One Big Beautiful Bill Act, signed into law on July 4, 2025, which made the Tax Cuts and Jobs Act's rate structure permanent and added provisions of its own.

The IRS figures follow later in the cycle. The release gets graded in December: if Roth conversions are still being sized in the final week of the year, the head start bought nothing.