Social Security Wage Base 2027: What Changed and How to Update
6/25/2026
The Social Security wage base is the most visible annual payroll change and one of the easiest to get wrong, because the consequence of a stale figure is invisible until an employee approaches the ceiling — potentially in October, ten months after the error was introduced.
What the Wage Base Is
The taxable maximum, or contribution and benefit base, is the annual limit on wages subject to the Social Security portion of FICA. Once an employee's Social Security wages reach it in a calendar year, both the employee and the employer stop paying the 6.2% OASDI tax for the remainder of the year.
Two things it does not limit:
Medicare has no wage base. The 1.45% Medicare tax continues on all wages, and the employee-only Additional Medicare Tax of 0.9% applies above $200,000 — a threshold that is not indexed.
It does not limit income tax withholding, which continues regardless.
The practical effect employees notice: a high earner's net pay increases partway through the year when OASDI stops, then does not increase further because Medicare continues. This generates a predictable question each autumn.
The Recent Figures
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Year
|
Taxable maximum
|
|
2025
|
$176,100
|
|
2026
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$184,500
|
|
2027
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Announced by the SSA in October 2026
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The base is indexed to average wage growth and is announced by the Social Security Administration each October for the following year, generally alongside the annual cost-of-living adjustment.
Because the 2027 figure is published in October 2026, it should be taken directly from the SSA announcement. Projecting it from the trend produces a number that is close and wrong, and "close" is not useful for a hard ceiling.
The rate itself does not change: 6.2% for the employee and 6.2% for the employer, for a combined 12.4%, is set by statute.
What to Update, and How to Verify It
Loading the new base is one field. Verifying it works is the part that matters.
- [ ] Enter the new taxable maximum before the first payroll of the year
- [ ] Confirm the prior year's figure was not carried forward — this is the actual failure mode
- [ ] Test a calculation. Run an employee at and just above the new ceiling and confirm OASDI stops at the right point. Field values can be correct while the logic is not, particularly after a system upgrade.
- [ ] Confirm year-to-date balances reset to zero for the new calendar year
- [ ] Confirm the employer match stops at the same ceiling, not only the employee withholding
- [ ] Confirm the Additional Medicare threshold remains $200,000 and is applied on cumulative wages
- [ ] Confirm tips are included in the Social Security wage calculation, where applicable — Boxes 3 and 7 combined are subject to the same ceiling
- [ ] Document the date loaded and by whom
The consequences of getting it wrong run in both directions. A base loaded too low stops withholding early, under-collecting from both the employee and the employer and producing a Form W-2 whose Box 4 does not equal 6.2% of Box 3. A base loaded too high continues withholding past the ceiling, over-collecting from the employee — which must be refunded — and from the employer, which requires a correction.
Our Paycheck Fundamentals Training & Certification Program covers the wage base mechanics.
The Mid-Year Job Change Trap
This is the rule most often misapplied, and the misapplication is well-intentioned.
The wage base does not transfer between employers. An employee who earned $150,000 at a prior employer and joins you mid-year starts a fresh Social Security wage base at zero with you. You withhold OASDI on their wages with you up to the full annual maximum, regardless of what the prior employer withheld.
Consequences:
- The employee may pay Social Security tax on more than the annual maximum across two jobs
- The employee recovers the excess on their personal income tax return, as a credit
- The employer does not get a refund and should not attempt to credit it
- You should not reduce withholding based on the employee's prior-employer figures, even if they provide a pay stub
Employees sometimes present prior-employer year-to-date figures and ask you to stop withholding. The answer is no, with the explanation that they will recover it when they file. Honoring the request under-withholds and creates employer liability.
The Successor Employer Exception
The one situation where prior wages may count, and it is a transaction-structure question rather than a payroll one.
In specific statutory successor situations following certain acquisitions, wages paid by the predecessor employer may be counted toward the successor's wage base — avoiding a duplicate wage base on the same employees.
Because it depends on how the transaction was structured and on the statutory conditions being met, this must be resolved with tax advisors before the first post-closing payroll. Getting it wrong is expensive in either direction: assuming succession when it does not apply under-collects, and assuming it does not apply when it does causes the combined entities to pay OASDI twice on the same wages.
The same analysis affects the FUTA wage base and, separately, state unemployment experience rate succession — which is governed by state law and may reach a different answer than the federal analysis. See our FUTA tax guide.
The Common Paymaster Arrangement
A related mechanism worth knowing. Where an employee works for two or more related corporations, common paymaster rules can permit the wages to be treated as paid by a single employer for FICA purposes — avoiding a duplicated wage base within the group.
The arrangement has specific requirements, and assuming it applies because the entities share ownership is a mistake. Confirm it is properly established before relying on it.
Downstream Effects
The wage base figure appears in more places than the OASDI calculation:
Form W-2 Box 3 should never exceed the annual taxable maximum for any employee. This is a straightforward year-end validation, and a figure a few dollars over indicates a configuration error.
Form W-2 Box 4 should equal exactly 6.2% of Box 3. A mismatch means either a wage base error or a withholding error.
Form 941 reconciliation. The quarterly Social Security wages figure must tie to the register, and no individual employee should exceed the maximum. See our year-end reconciliation guide.
Retirement plan compensation limits are separate figures with their own indexation — do not conflate them with the wage base.
Highly compensated employee determinations for benefit plan testing use their own indexed threshold, also distinct.
Bonus runs. A year-end bonus frequently pushes employees across the ceiling mid-run, and separately across the $200,000 Additional Medicare threshold. Both need to be handled in the same calculation. See our year-end bonus taxation guide.
Explaining It to Employees
Two conversations recur, and both are easier delivered proactively.
"Why did my paycheck go up in November?" Because they reached the Social Security taxable maximum and the 6.2% OASDI withholding stopped. Medicare continues, so the increase is 6.2% of gross rather than the full 7.65%. It resets in January, so the higher net pay is temporary.
"I already maxed out Social Security at my old job — can you stop withholding?" No. The wage base restarts with each employer, so withholding is required on wages paid by you up to the full annual maximum. The excess is recovered as a credit on their personal return. This is worth explaining at onboarding for any mid-year hire at a senior level, because the alternative is the conversation happening after they notice.
Why the Ceiling Matters Less Than It Appears
For most employers, the annual change in the taxable maximum has a smaller cost impact than the attention it receives — and understanding why helps direct effort to the items that actually move money.
The affected population is narrow. Only employees whose annual Social Security wages exceed the ceiling are affected at all. For a workforce concentrated well below it, an increase in the maximum changes nothing, because nobody reaches either the old figure or the new one.
The incremental cost is bounded. For each employee who exceeds both the old and new ceilings, the additional employer cost is 6.2% of the increase — so a several-thousand-dollar increase in the maximum costs a few hundred dollars per affected employee. Meaningful in aggregate for an employer with many high earners, negligible for most others.
Where the real annual variance sits is state unemployment: both the wage base and your company-specific experience rate change, the rate can move substantially based on your own claims experience, and a FUTA credit reduction can appear late in the year for states that have been borrowing. That line moves more than the Social Security ceiling for the majority of employers.
The reason to get the wage base exactly right is therefore not cost management — it is that an incorrect ceiling produces a Form W-2 that will not reconcile, with Box 4 failing to equal 6.2% of Box 3, which is a correction exercise rather than a budget variance.
Frequently Asked Questions
What is the Social Security wage base for 2027?
It is announced by the Social Security Administration in October 2026, indexed to average wage growth. For reference, the taxable maximum was $176,100 for 2025 and $184,500 for 2026. Take the 2027 figure from the SSA announcement rather than projecting from the trend — a hard ceiling needs the exact number.
Does the Social Security tax rate change for 2027?
No. The rate is set by statute at 6.2% for the employee and 6.2% for the employer, a combined 12.4%. What changes annually is the taxable maximum — the wage ceiling above which the tax no longer applies. The Medicare rate of 1.45% each side and the employee-only Additional Medicare rate of 0.9% are likewise fixed.
Does the Social Security wage base restart when an employee changes jobs?
Yes. The wage base does not transfer between employers, so an employee who joins mid-year starts a fresh base at zero with the new employer regardless of what a prior employer withheld. The employee may therefore pay Social Security tax on more than the annual maximum across two jobs, recovering the excess as a credit on their personal return. The employer receives no refund and must not reduce withholding based on prior-employer figures.
Is there a wage base for Medicare tax?
No. Medicare applies to all wages with no ceiling, which is why a high earner's net pay increases by 6.2% rather than 7.65% when Social Security stops. The employee-only Additional Medicare Tax of 0.9% applies to wages above $200,000, and that threshold has never been indexed — so wage growth alone brings more employees above it each year.
What happens if an employer withholds Social Security above the wage base?
The over-collected amount must be refunded to the employee, and the employer's own over-payment requires correction — generally through Form 941-X and, if the Form W-2 has been filed, Form W-2c. The error is detectable at year end because Box 3 will exceed the annual maximum and Box 4 will not equal 6.2% of Box 3, which makes it worth validating before filing rather than after.
Do prior employer wages count in an acquisition?
Sometimes. In specific statutory successor situations following certain acquisitions, wages paid by the predecessor may count toward the successor's wage base, avoiding a duplicate base on the same employees. Because it depends on the transaction structure and on statutory conditions being satisfied, resolve it with tax advisors before the first post-closing payroll — the error is costly in either direction.
Going Deeper
The 2027 taxable maximum is announced in October 2026 and was not available when this guide was written. Take the figure from the Social Security Administration's announcement, and verify your system stops withholding at the correct ceiling by testing a calculation rather than only checking the field value.
