2027 Brackets and What They Do to Your Estimates

The 2027 tax brackets are not published. The most recent Revenue Procedure is 2026-32, and it is about accounting method changes for research expenditures — there is no successor yet to Rev. Proc. 2025-32, the document that carried the 2026 figures. Any page showing you a 2027 bracket table today is showing you somebody’s CPI projection, not a number the IRS has set.

So this page is about the mechanism: what the annual Revenue Procedure is, when it arrives, and the part nobody writes for the self-employed — which of your estimated-payment inputs it actually moves, and which it cannot touch. The 2027 figures that are already official are here too, and there are more of them than you would think.

What is not on this page yet

Stated plainly, so you know what you are reading.

2027 figure	Status
Tax rate tables	Not published
Standard deduction	Not published
QBI threshold and phase-in range	Not published
Section 179 expensing limit	Not published
Section 199A minimum deduction ($400 / $1,000 for 2026)	Not published
Social security wage base	Set separately by the Social Security Administration, not by the Revenue Procedure
HSA contribution limits	Official — Rev. Proc. 2026-24
ACA applicable percentage table	Official — Rev. Proc. 2026-26
SALT cap	Computable from the statute
Estimated payment due dates	Computable from the statute

When the Revenue Procedure lands, the bracket thresholds and the standard deduction in the worked example below are the only lines that change. That is the point of the arithmetic further down: it tells you in advance how much of your planning the new numbers can disturb.

We are not estimating the unpublished figures. Projections of inflation adjustments are usually close, and “usually close” is not a basis for a payment you are making to avoid a penalty.

What the annual Revenue Procedure is

Section 1(f) of the Internal Revenue Code requires the bracket thresholds to be adjusted each year for cost of living, and dozens of other provisions carry their own adjustment rules. Rather than publish them separately, the IRS collects them into one revenue procedure every autumn.

For 2026 that was Rev. Proc. 2025-32, which lists each adjusted item against its Code section — rate tables under section 1(j)(2), the standard deduction under section 63, section 179 expensing, qualified business income under section 199A, and about forty more. Its purpose statement dates it:

This revenue procedure sets forth inflation-adjusted items for 2026 for various Code provisions as in effect on October 9, 2025.

Its predecessor, Rev. Proc. 2024-40, appeared at 2024-45 I.R.B. 1100 — the Bulletin dated early November. So the window is mid-October into early November, and what to watch for is a revenue procedure in the 2026 series whose purpose statement says “2027”.

Reading it is a matter of finding the section headed 2027 Adjusted Items and then the subsection for the provision you want. They run in Code order, not by importance: the standard deduction sits at .14 because section 63 falls where it does.

Why this matters in April, not next April

Here is the self-employed angle, and it is the reason this page exists.

An employee’s withholding adjusts itself — the payroll system reads the new tables in January and nobody thinks about it. You have no payroll system. Your first 2027 payment is due April 15, 2027, and whatever you send that day is a number you computed yourself.

There are two ways to arrive at it, and only one needs the 2027 figures.

Method	What it needs	Available today?
Safe harbour — 100% of your 2026 tax, or 110% if 2026 AGI was over $150,000	Your finished 2026 return	Yes, once you file
Current-year method — 90% of what you will owe for 2027	2027 brackets, standard deduction, QBI threshold	No

Section 6654(d)(1)(B) defines the required annual payment as the lesser of those two. Section 6654(d)(1)(C) is the 110% rule, and for a married individual filing separately the $150,000 trigger drops to $75,000.

Only one of the two methods is blocked. The safe harbour needs last year's return, not next year's tables.

That asymmetry is the practical answer to the whole question. If your income is roughly steady, the safe harbour works and the 2027 inflation figures are irrelevant to your April payment. Quarterly estimated taxes explains what it buys you — immunity from the penalty regardless of how the year turns out — and how to pay estimated taxes covers the mechanics.

The current-year method is for people whose income is changing enough that paying on last year’s tax would mean grossly overpaying. That is where you need the new figures, and where guessing them is worst.

The arithmetic, worked on 2026 figures

Single filer, Schedule C net profit of $90,000, no other income, standard deduction, no dependents. All figures from Rev. Proc. 2025-32 and Form 1040-ES (2026).

Step	Amount	Where the number comes from
Net profit, Schedule C	$90,000	Your books
× 92.35%	$83,115	Section 1402(a)(12), fixed
Self-employment tax at 15.3%	$12,717	Sections 1401(a) and (b), fixed
Deduction for half of it	$6,358	Section 164(f), fixed
Adjusted gross income	$83,642
Less standard deduction	$16,100	Rev. Proc. — changes for 2027
Taxable income before QBI	$67,542
QBI deduction, lesser of 20% of QBI or 20% of that	$13,508	20% rate fixed; the cap moves with the standard deduction
Taxable income	$54,034
Income tax: $5,800 + 22% over $50,400	$6,599	Rev. Proc. — changes for 2027
Total tax	$19,316
Safe harbour instalment, one quarter of that	$4,829	Section 6654(d), fixed

Two things there are worth sitting with.

The self-employment tax half — $12,717 of the $19,316 — contains no inflation-adjusted figure at all below the wage base. The 92.35% multiplier, the 12.4%, and the 2.9% are written into the statute, and a new Revenue Procedure does not move that number by a cent. Self-employment tax works through why; the self-employment tax calculator does the multiplication.

And the standard deduction moves the answer twice: once directly, and once through the QBI cap, since the deduction is limited to 20% of taxable income computed before it. A larger standard deduction shrinks the QBI deduction. That second-order effect is what hand calculations miss. The 20% deduction for being self-employed sets out the limit in full.

Which inputs the Revenue Procedure moves

This is the table to keep. When the 2027 numbers land, recompute the left column and leave the right column alone.

Moves with the Revenue Procedure	Fixed by statute
Bracket thresholds	The 92.35% net earnings multiplier
Standard deduction	The 12.4% and 2.9% self-employment tax rates
QBI threshold and phase-in range	The 20% QBI rate
Section 179 limit ($2,560,000 for 2026) and SUV cap ($32,000)	The 90% / 100% / 110% safe harbour percentages
Section 199A minimum deduction	The $150,000 AGI trigger for the 110% rule
Long-term care premium caps	The four instalment due dates

The right column is why a self-employed person’s planning is less exposed to the October announcement than an employee’s: most of what determines your bill is statutory. Schedule C, line by line and writing off equipment read the same in 2027 as in 2026, the section 179 ceiling aside — and that ceiling binds on almost nobody filing a Schedule C.

What is already official for 2027

More than you would expect, because these come from their own revenue procedures rather than the big one.

HSA limits. Rev. Proc. 2026-24 sets the 2027 contribution limit at $4,500 for self-only coverage and $9,000 for family coverage. A qualifying high deductible health plan for 2027 needs an annual deductible of at least $1,750 self-only or $3,500 family, with out-of-pocket maximums no higher than $8,700 and $17,400.

The ACA applicable percentage table. Rev. Proc. 2026-26 gives the 2027 table used to compute the premium tax credit. The top rate is 10.22%, reached at 300% of the federal poverty line and holding to 400%. The table stops there: above 400% there is no credit, and that cliff is still in place for 2027. The required contribution percentage for employer coverage affordability is also 10.22%. Health insurance in 2026 explains the cliff; the health insurance deduction calculator handles the interaction with the self-employed deduction.

The SALT cap. Section 164(b)(7)(A)(iii) says the limit for a taxable year beginning after 2026 and before 2030 is 101% of the amount in effect for the preceding year. The 2026 amount is $40,400, so 2027 is $40,804 — computed from the statute rather than published by the IRS, but the statute leaves no discretion in it. State tax reaches most freelancers through state tax on self-employment income rather than through this cap, which sits on Schedule A.

The 2027 payment dates

Section 6654(c)(2) sets the instalments at April 15, June 15, September 15, and January 15 of the following year. Section 7503 moves any date that falls on a Saturday, Sunday, or a legal holiday in the District of Columbia to the next day that is none of those.

Instalment	2027 date	Note
Q1	April 15, 2027	Thursday
Q2	June 15, 2027	Tuesday
Q3	September 15, 2027	Wednesday
Q4	January 18, 2028	Computed. January 15 is a Saturday and the 17th is the Birthday of Martin Luther King, Jr., the third Monday in January

Why the last 2027 instalment is January 18. Two shifts, not one.

The first three are weekdays and do not shift. Only Q4 does, and it shifts twice — past the weekend and past the holiday. We label it computed because the IRS has not yet issued a 2027 Form 1040-ES; when it does, that is the document to confirm against.

The three-month, two-month, three-month, four-month pattern behind those dates is unchanged, which catches people every year. If 2027 is your first year of this, first-year quarterly taxes covers the start-up case; if you also hold a job, adjusting your W-4 instead of paying quarterlies is often simpler.

What to do before the figures arrive

Finish your 2026 return early. It is the only input the safe harbour needs, and having it in hand by March makes the April 15 payment a one-line calculation. The quarterly tax calculator takes it from there.

Decide whether you are a safe harbour case or a current-year case. If your 2027 income will be materially different from 2026 you are on the current-year method and you genuinely need the new tables. If it will not, you do not — and if a figure is not published, the honest planning assumption is last year’s figure, flagged as provisional.

Check whether you underpaid 2026 while the year is still fresh. You did not pay estimated taxes sets out what that costs, which is interest rather than a fine.

This page will be updated when the 2027 Revenue Procedure is published, with the rate tables, the standard deduction, the QBI thresholds and the section 179 limits filled into the slots above.

Frequently asked questions

Why do other sites already have 2027 brackets?

Because the brackets are computed from published inflation data under a formula in section 1(f), so they can be projected with reasonable accuracy before the IRS confirms them. A projection is not a published figure, and a site that does not label it as one is misrepresenting it.

When exactly will the 2027 numbers come out?

There is no statutory deadline. Recent years have landed mid-October to early November: Rev. Proc. 2025-32 was written against the law as of October 9, 2025, and Rev. Proc. 2024-40 appeared in the Bulletin dated early November 2024.

Can I compute my April 2027 payment without them?

Yes, if you use the safe harbour. One hundred percent of your 2026 total tax divided by four, or 110% if your 2026 adjusted gross income was over $150,000. That needs your 2026 return and nothing else.

Do the new brackets change my self-employment tax?

Not below the wage base. The 92.35% multiplier and the 15.3% combined rate are statutory. What moves is the point at which the 12.4% social security portion stops, and that figure comes from the Social Security Administration rather than the Revenue Procedure.

My spouse and I file jointly. Does anything here work differently?

Most thresholds double or nearly double, but the 110% trigger stays at $150,000 of combined AGI rather than doubling. Estimated taxes when married filing jointly covers the joint case, including what happens when only one of you is self-employed.

Is there anything else changing for 2027 I should know about?

OBBBA section 71301 narrows premium tax credit eligibility for lawfully present aliens, effective for tax years beginning after December 31, 2026. For what has already changed on the return you are filing now, see what changed for the 2026 tax return.