Payroll Small Business Tax Planning

What the 2027 Social Security Wage Base Does to Your Payroll Costs (and What Still Isn't Published)

Published October 26, 2026 by Invisible LLC Team · 10 min read

You own a small business. You are not a payroll analyst, and the annual ritual of reading inflation announcements to find out what next year costs you is nobody's idea of a good Tuesday.

So here is the whole thing in one line: the Social Security taxable maximum goes to $192,300 for 2027, up from $184,500 in 2026. Everything else in this post is what that means for your budget and what you can't know yet.

Key takeaways: The wage base moves, the rate doesn't. For every employee who earns above the new ceiling, your employer-side Social Security tax goes up by $483.60 for 2027 and theirs goes up by the same. The 3.6% cost-of-living adjustment in the same announcement changes benefits paid to retirees — it does not change your payroll, and you should stop anyone who tells you it does. And the two 2027 numbers you probably care about most — retirement-plan contribution limits and the IRS's annual inflation adjustments — are not published yet as of October 19, 2026.

What actually changed: one number

The Social Security Administration published its 2027 cost-of-living figures in October 2026. Two numbers lead the announcement:

A 3.6% cost-of-living adjustment (COLA) for Social Security and SSI recipients, beginning with benefits payable in January 2027, based on the rise in the CPI-W from the third quarter of 2025 through the third quarter of 2026.
A taxable maximum (the "contribution and benefit base") of $192,300 for earnings in 2027, up from $184,500 for 2026.

Source: the SSA's 2027 COLA fact sheet and its COLA information page. We are citing the agency's own fact sheet rather than the coverage that surfaced it, and we're not putting a publication date on the announcement in this post — the figures are what we verified, not the dateline.

The second number is the one that touches your payroll. The first one does not, and we'll come back to that because the genre gets it wrong constantly.

The arithmetic on your highest earners

The rates themselves are unchanged. Per IRS Topic No. 751, the current Social Security rate is "6.2% for the employer and 6.2% for the employee, or 12.4% total," and Medicare is "1.45% for the employer and 1.45% for the employee, or 2.9% total."

So the wage base is a ceiling, and all that moved is where the ceiling sits:

	2026	2027	Change
Social Security taxable maximum	$184,500	$192,300	+$7,800
Max employer-side Social Security tax per employee (6.2%)	$11,439.00	$11,922.60	+$483.60
Max employee-side Social Security tax per employee (6.2%)	$11,439.00	$11,922.60	+$483.60

(Those dollar figures are 6.2% of the published base — our arithmetic, not an SSA-published amount.)

Three things follow, and they're the whole budgeting story:

1. The increase only touches employees above the old ceiling. If nobody on your payroll earns more than $184,500, this change costs you nothing. Not "a little" — nothing. The ceiling moved somewhere above your whole payroll.

2. The maximum exposure per affected employee is $483.60. That is the worst case, per person, on the employer side. For a business with two owner-employees and a sales lead above the ceiling, you are budgeting roughly $1,450 of additional employer tax for 2027. It is a real number and it is not a crisis number.

3. Medicare has no ceiling at all, so it was never part of this. Topic No. 751 is explicit: "There's no wage base limit for Medicare tax. All covered wages are subject to Medicare tax." On top of that, employers withhold an Additional Medicare Tax of 0.9% on an individual's wages above $200,000 in a calendar year, "without regard to filing status," with no employer match. Note that the IRS states that $200,000 trigger without tying it to an annual adjustment — unlike the Social Security base, there is no yearly figure to go look up. If you have an employee crossing $200,000, that withholding switch is a separate thing from the wage base and it flips at its own number.

Why the COLA headline does nothing to your payroll

This is the part worth being blunt about, because every October a version of "Social Security COLA announced — what employers need to know" circulates and implies a connection that isn't there.

The 3.6% COLA raises benefit payments to people receiving Social Security and SSI. It is a cost to the trust funds, not to your payroll. It does not change your tax rate, it does not change your withholding, and it does not change what any current employee costs you.

The number that affects you is the taxable maximum. The two figures travel together in the same announcement because they're both indexed, but they do different work. If someone brings you a 2027 payroll budget with a 3.6% line item in it, ask what that line represents — the COLA is not it.

(The two percentages don't even match, which is the tell. The COLA tracks the CPI-W. The wage base is indexed to the national average wage index and rounded to the nearest multiple of $300, per SSA's contribution and benefit base documentation — which is why the base rose about 4.2% in a year the COLA came in at 3.6%.)

What to check in your payroll system before the first January run

None of this requires action in October. Most of it requires five minutes in late December or very early January, before the first 2027 payroll hits.

Confirm your payroll system picked up the new base. Reputable providers update this automatically and on time. Confirm it anyway, on an actual 2027 pay stub for an above-ceiling employee, because the failure mode — over-withholding all year on someone's wages above $192,300 — is tedious to unwind and lands on the employee's return, not yours.
Re-check any wage caps you hard-coded yourself. If you maintain a spreadsheet for owner compensation, bonus accruals, or a commission plan with a Social Security offset in it, that is where last year's number survives. Search for "184,500" and for "11,439" in anything you built.
Reset your deposit schedule expectations. Your monthly-versus-semiweekly depositor status for 2027 is determined by what you reported in a lookback period, not by next year's wages — but if your payroll grew, check the new status before January rather than discovering it with a late deposit. The rules are in IRS Topic No. 757.
Confirm state figures separately. State unemployment insurance wage bases and rates are set state by state and most of them also reset on January 1. Your federal number being right says nothing about your state accounts. We're not quoting state figures here — look up each state where you have an employee, or ask whoever runs your payroll to show you the 2027 rate notice.
Put the W-2 deadline on the calendar now. For tax year 2026, Forms W-2 must be furnished to employees and filed with the SSA by February 1, 2027, per the General Instructions for Forms W-2 and W-3. (January 31 falls on a Sunday that year; the IRS already applied the shift.) That deadline arrives before most of the 2027 planning questions do.

If you're budgeting 2027 payroll more broadly, two sibling pieces cover the other moving parts without repeating this one: the 2027 ACA affordability threshold for employers handles health-coverage affordability math, and the paid family and medical leave tax credit covers the credit side. There's also the new overtime deduction and W-2 code TT, which is a reporting change rather than a cost change — and the one most likely to surprise whoever prepares your W-2s.

What is NOT published yet for 2027 — and what already is

This section is the reason this post exists in October rather than December, and it is the thing most 2027-planning articles will quietly fudge.

Not published as of October 19, 2026:

The 2027 retirement-plan contribution limits. The IRS's own COLA increases for dollar limitations table currently shows 2026, 2025, 2024 and 2023 — and stops. The most recent year published is 2026, under Notice 2025-67 (Internal Revenue Bulletin 2025-49, page 761). There is no 2027 column. If you see a 2027 401(k) deferral limit quoted anywhere this month, ask for the notice number. It does not exist yet.
The IRS's annual inflation-adjustment revenue procedure for 2027. The 2026 edition was Rev. Proc. 2025-32, which appeared in Internal Revenue Bulletin 2025-45, dated November 3, 2025. The 2027 equivalent has not issued. That document is where a pile of employer-adjacent figures live, so a complete 2027 picture isn't available to anyone yet.

Both of these historically arrive in late October or November. They may well land before you finish your budget. They have not landed as of the date on this post, and any article implying a full 2027 picture today is filling in blanks.

Already published for 2027, and safe to build on:

HSA and high-deductible health plan limits, in Rev. Proc. 2026-24 (Internal Revenue Bulletin 2026-25, June 15, 2026): annual HSA deduction limits of $4,500 for self-only coverage and $9,000 for family coverage; HDHP minimum annual deductibles of $1,750 self-only and $3,500 family; and out-of-pocket maximums of $8,700 self-only and $17,400 family.
The §36B applicable percentage table for 2027, in Rev. Proc. 2026-26.
The Social Security taxable maximum, which is where we started.

So if you are building a 2027 benefits and payroll budget right now, you can firm up the Social Security line and the HSA/HDHP lines today, and you should leave the retirement-plan limits as a placeholder with a note to revisit. That's not a satisfying answer. It is the accurate one.

The part that should not be your job

None of the above is hard. It's just a dozen small, dated, moving things that have to be right, in a year where two of them haven't been published yet and three of them are state-specific.

That is precisely the work we take off people's desks. Our payroll and benefits service exists because a business owner should not have to track which revenue procedure dropped in which bulletin to know what January costs — and because the cost of getting one of these wrong always shows up as a notice, months later, addressed to you.

If you'd rather have a person watching these dates than a reminder in your own calendar, get a quote and tell us how many people you run payroll for. We work with small businesses where the owner is also the CFO, the HR department, and the person who signs the checks — and the right answer is usually to hand the whole category to someone whose job it is.