Social Security Tax Limit 2027 (and 2026): The Wage Base, the Maximum Tax, and What Self-Employed People Pay

The Social Security tax limit for 2027 is projected at $190,200, up from the official $184,500 for 2026: wages and self-employment earnings above that line owe no Social Security tax for the year. The 2027 figure is a projection from the 2026 Social Security Trustees Report, and the Social Security Administration (SSA) is expected to announce the official number on October 14, 2026, when September inflation data comes out. At the 2026 limit, an employee pays at most $11,439 (6.2%) and a self-employed person at most $22,878 (12.4%) in Social Security tax; Medicare tax has no limit.

Key takeaways:

• $184,500 is the 2026 Social Security wage base (official); $190,200 is the 2027 projection (2026 Trustees Report, intermediate assumptions) until SSA announces the figure, expected October 14, 2026
• Maximum 2026 Social Security tax: $11,439 for an employee (6.2%), matched by the employer, or $22,878 for a self-employed person (12.4%)
• W-2 wages and self-employment earnings share one wage base per person: Schedule SE (Form 1040) subtracts your W-2 Social Security wages (line 8a) before it applies 12.4% (line 10)
• Medicare tax has no cap, and the 0.9% Additional Medicare Tax starts above $200,000 ($250,000 joint), a threshold that is not indexed
• Two employers withheld more than $11,439 in total for 2026? The excess comes back on Schedule 3 (Form 1040), line 11

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What Is the Social Security Tax Limit for 2027?

The Social Security tax limit for 2027 is a projected $190,200 of combined wages and net self-employment earnings per worker. The figure is a projection, not law: it comes from Table V.C1 of the 2026 Annual Report of the Board of Trustees of the Federal Old-Age and Survivors Insurance and Federal Disability Insurance Trust Funds, released June 9, 2026, under the intermediate assumptions the Trustees set in February 2026.

SSA's official name for the limit is the contribution and benefit base, which SSA also calls the taxable maximum or maximum taxable earnings; the IRS calls it the social security wage base limit, and this article calls it the wage base. The wage base caps the Old-Age, Survivors, and Disability Insurance (OASDI) tax that employees and employers pay under the Federal Insurance Contributions Act (FICA) and the self-employed pay under the Self-Employment Contributions Act (SECA). The same base caps the earnings SSA credits toward your benefit.

If the projection holds, 2027 compares with 2026 like this:

The Trustees' low-cost and high-cost scenarios give $189,900 and $190,500 for 2027, and the intermediate projection for 2028 is $198,900. The formula section below shows why the official 2027 figure could still land at $190,500.

What Is the Maximum Social Security Tax for 2026?

The maximum Social Security tax for 2026 is $11,439 for an employee: 6.2% of the $184,500 wage base, withheld from pay, with the employer paying a matching $11,439. A self-employed person with no W-2 wages pays at most $22,878 in the Social Security part of self-employment tax, 12.4% of the same $184,500. SSA announced the 2026 base on October 24, 2025, and the IRS prints it in Publication 15 (2026), in Form 1040-ES (2026), and on line 7 of the 2026 draft Schedule SE.

The rates are set by statute and stay the same in 2027: 6.2% each for employee and employer under Internal Revenue Code (IRC) §3101(a) and §3111(a), and 12.4% on self-employment income under IRC §1401(a). With Medicare added, SSA's 2026 fact sheet lists 7.65% for employees and 15.30% for the self-employed. Use the 2026 base for your 2026 return, filed in 2027, and for the last 2026 estimated payment, due January 15, 2027.

How Do W-2 Wages and Self-Employment Income Share the Wage Base?

W-2 wages and self-employment earnings share a single Social Security wage base per person, and wages use it up first. Schedule SE (Form 1040), the IRS schedule that computes self-employment tax, handles the coordination in lines numbered the same on the 2025 form and the 2026 draft:

The 92.35% on line 4a stands in for the employer's deduction: IRC §1402(a)(12) removes half of the 15.3% combined rate from net earnings. Lines 7 through 10 carry out IRC §1402(b)(1), which excludes from self-employment income everything above the wage base minus your wages for the year, the subtraction that Treasury Regulation §1.1402(b)-1(b) spells out.

The wage base belongs to each person, never to a household: if both spouses have self-employment income, each files a separate Schedule SE, and a spouse's salary never reduces your room. Our Schedule SE line-by-line instructions cover the optional methods and church employee income that the table leaves out.

Run Your Own Wages and Side Profit Through the Wage Base

Worked Example: A $150,000 Salary Plus $60,000 of Freelance Profit

Tomasz's return shows how a W-2 salary and side income share the Social Security wage base. He is a product manager with a $150,000 salary, the same figure in boxes 3 and 5 of his Form W-2, and runs a UX research practice on the side that he reports on Schedule C. The practice nets $60,000, he files single, and nothing else changes between the two years below. The tool above opens on these numbers.

His employer withholds $9,300 of Social Security tax (6.2% of $150,000) in both years. In 2026, $20,910 of his $55,410 in net earnings sits above the wage base, which saves him $2,592.84 compared with applying the full 15.3% to all of it ($8,477.73). In 2027 the higher projected base leaves $15,210 above the line, and his self-employment tax rises by $706.80, exactly 12.4% of the $5,700 increase.

One more tax sits outside Schedule SE. Tomasz's wages plus net earnings reach $205,410. Form 8959, the IRS form for the 0.9% Additional Medicare Tax, lowers his $200,000 single-filer threshold by his $150,000 of Medicare wages and taxes the remaining $5,410 of self-employment income, which adds $48.69 in both years.

What Counts Toward the Wage Base for S Corporation Owners and Partners?

For an S corporation owner, only the W-2 salary counts toward the Social Security wage base; for a partner, trade income and guaranteed payments count as self-employment income. Salary from your own S corporation goes on Schedule SE line 8a and uses the wage base like any other paycheck, and the corporation pays the matching 6.2%. The S corporation income passed through to you on Schedule K-1 "isn't self-employment income and isn't subject to self-employment tax," according to the 2025 Instructions for Form 1120-S. A partner's trade income and guaranteed payments from Schedule K-1 (Form 1065), box 14, code A, go on line 2 as self-employment income.

Two other kinds of pay reduce the room on line 9. Railroad tier 1 compensation counts on line 8a because IRC §3231(e)(2) ties the tier 1 base to the same contribution and benefit base. Wages a misclassified worker reports on Form 8919 go on line 8c; the mechanics are in our Form 8919 guide to uncollected Social Security and Medicare tax.

How Much Self-Employment Tax Do You Pay Above the Cap?

Above the Social Security wage base, self-employment tax drops from 15.3% to 2.9% on each additional dollar of net earnings, so the tax as a share of profit starts to fall. A sole proprietor with no W-2 job reaches the 2026 wage base at $199,783 of Schedule C profit ($184,500 ÷ 0.9235); below that, self-employment tax is a flat 14.13% of profit (15.3% × 92.35%).

Ines, freelance data engineer, $240,000 of 2026 Schedule C profit, no W-2 wages, files single:

• Net earnings from self-employment: $240,000 × 92.35% = $221,640.00
• Social Security part: 12.4% × $184,500 = $22,878.00, with the other $37,140 of net earnings above the base
• Medicare part: 2.9% × $221,640 = $6,427.56
• Self-employment tax: $29,305.56, or 12.21% of her profit; half of it, $14,652.78, is deductible on Schedule 1, line 15
• Additional Medicare Tax on Form 8959: 0.9% × ($221,640 − $200,000) = $194.76

The deduction for half of self-employment tax under IRC §164(f) lowers income tax, not the self-employment tax itself, and it excludes the 0.9% surtax. Our self-employment tax guide for 2026 covers the legal ways to reduce what you owe, and the Form 8959 guide to the 0.9% Additional Medicare Tax works through the surtax line by line.

What If Two Employers Withheld Too Much Social Security Tax?

Each employer withholds 6.2% Social Security tax on the first $184,500 it pays you in 2026 without knowing about your other jobs, so two jobs can push total withholding past the $11,439 maximum. The excess comes back as a refundable credit on Schedule 3 (Form 1040), line 11, "Excess social security and tier 1 RRTA tax withheld," which flows into total payments on Form 1040, line 31. IRC §6413(c) creates this special refund, and Treasury Regulation §1.31-2 says you claim it on your income tax return as if it were withheld income tax.

Anouk, two W-2 jobs in 2026: $120,000 from a hospital and $90,000 from a university, $210,000 in total. The hospital withholds $7,440 and the university $5,580, $13,020 altogether, so her 2026 return claims $13,020 − $11,439 = $1,581 on Schedule 3, line 11.

Two limits come from the 2025 Instructions for Form 1040:

• If a single employer withheld more than the maximum, the excess can't go on your return. That employer should correct it, and if it doesn't, you file a claim for refund on Form 843.
• Married couples figure the excess separately for each spouse, because wages never combine across spouses.

The employer share stays paid. IRC §3121(a)(1) applies the wage base separately to each employer, and the special refund in §6413(c) covers only the tax taken from your pay, so Anouk's hospital and university keep paying their own $7,440 and $5,580. Employers can model that cost with our payroll tax calculator for employer taxes.

Social Security Tax Limit by Year, 2017 to 2027

The Social Security tax limit, SSA's maximum taxable earnings, rose 45% between 2017 and 2026, from $127,200 to $184,500, because the wage base follows average wages rather than prices. Values through 2026 come from SSA's contribution and benefit base history; the projected rows come from Table V.C1 of the 2026 Trustees Report (intermediate assumptions).

The flat stretches in SSA's full history come from years without a cost-of-living adjustment (COLA): the base stayed at $106,800 in 2010 and 2011 and at $118,500 in 2016 because no COLA took effect in December 2009, December 2010, or December 2015.

How Does SSA Set the Wage Base, and When Is the 2027 Figure Announced?

The Social Security Administration sets each year's wage base with a formula in section 230 of the Social Security Act (42 U.S.C. §430): the 1994 base of $60,600 times the ratio of the national average wage index (AWI) two years earlier to the 1992 AWI of $22,935.42, rounded to the nearest multiple of $300. The base never falls, and it rises only when a COLA takes effect in December of the year the determination is made.

For 2026, SSA's published computation is $60,600 × $69,846.57 ÷ $22,935.42 = $184,548.71, which rounds to $184,500. The 2027 base will use the 2025 AWI, which SSA computes from 2025 wage data and has not published yet. The Trustees' intermediate estimate of the 2025 AWI, $72,025.07, gives $190,304.74 before rounding. That is only $45.26 short of $190,350, the point at which the statute rounds up to the next multiple of $300, so a 2025 AWI about $17 higher than the Trustees assumed would make the 2027 base $190,500.

The official figure arrives on this calendar:

1. October 14, 2026, 8:30 a.m. Eastern: the Bureau of Labor Statistics publishes September 2026 consumer prices, the last input for the COLA, and SSA is expected to announce the COLA and the 2027 wage base the same day. Last year the shutdown pushed that release to October 24, 2025, and SSA announced the 2026 base that day.
2. By November 1, 2026: 42 U.S.C. §430(a) requires SSA to publish the 2027 base in the Federal Register.
3. January 1, 2027: the new base applies to wages paid and taxable years beginning in 2027.

Inflation does not size the wage base. Consumer prices decide the COLA, and the COLA only switches the increase on; the size of the increase comes from the 2025 wage index. A higher or lower COLA forecast for 2027 therefore tells you nothing about the size of the 2027 base.

What the Social Security Tax Limit Does Not Cover

The Social Security wage base caps one tax, the OASDI tax at 6.2% (12.4% for the self-employed), and leaves these alone:

• Medicare tax. The 1.45% employee and employer Medicare tax and the 2.9% self-employed rate apply to every dollar; SSA notes there has been no Medicare taxable maximum since 1994.
• Additional Medicare Tax. The 0.9% surtax starts above $200,000 of wages and self-employment income ($250,000 on a joint return, $125,000 married filing separately) under IRC §3101(b)(2) and §1401(b)(2). Those thresholds are written into the Code and do not rise with inflation.
• Income tax. Earnings above the wage base stay fully subject to federal income tax.
• Tax on Social Security benefits. Up to 50% of benefits become taxable once combined income passes $25,000 ($32,000 joint), and up to 85% once it passes $34,000 ($44,000 joint), under IRC §86; none of those amounts is indexed. The options on SSA's actuarial pages that would change benefit taxation "starting in 2027" are scored proposals, not law. The deduction of up to $6,000 for people 65 and older under IRC §151(d)(5)(C), available through 2028, lowers income tax and has nothing to do with the wage base.
• The retirement earnings test. Beneficiaries under full retirement age have $1 of benefits withheld for every $2 earned above $24,480 in 2026, and $1 for every $3 above $65,160 in the year they reach full retirement age; the Trustees project $25,200 and $67,200 for 2027. That limit reduces benefit checks, not payroll tax. The Schedule SE instructions say self-employment tax applies "no matter how old you are and even if you are already getting social security or Medicare benefits."

Common Mistakes With the Social Security Wage Base

1. Leaving W-2 wages out of your estimate. The self-employment tax worksheet in Form 1040-ES (2026) asks for expected wages on line 6. Skip it and the worksheet charges 12.4% on side income your salary already covered: $2,592.84 too much in Tomasz's 2026 case.
2. Applying 15.3% to all profit. Self-employment tax applies to 92.35% of profit, and the 12.4% part stops at the base. Ines would overstate her 2026 tax by $7,414.44 with a flat 15.3% of $240,000 ($36,720.00).
3. Asking the IRS to fix one employer's over-withholding. Schedule 3, line 11 covers only excess caused by two or more employers. A single employer that withheld more than $11,439 in 2026 owes you the refund itself, or you file Form 843.
4. Putting the 2027 projection on a 2026 return. Your 2026 return and your January 15, 2027 estimated payment use $184,500; the 2027 projection is a planning figure until SSA replaces it in October.
5. Pooling the base with a spouse. Each spouse has a separate $184,500 base in 2026 and files a separate Schedule SE, so a spouse's high salary never lowers your 12.4%.

Side-Business Profit on Record Before Schedule SE: How Jupid Helps

Every Schedule SE calculation starts from one number, the net profit on line 2. Jupid connects to your business bank account and categorizes each transaction automatically, with 95.9% accuracy, so that profit figure stays current through the year instead of being rebuilt from statements in April. Ask the AI accountant in WhatsApp or iMessage what your side business has netted so far and the answer comes from your live books; set it next to the year-to-date Social Security wages on your pay stub and you know how much wage base you have left. Try Jupid.

Sources

• SSA: Contribution and Benefit Base, 1937-2026
• SSA: Contribution and Benefit Base Determination for 2026
• SSA: 2026 Cost-of-Living Adjustment Fact Sheet
• SSA: Cost-of-Living Adjustment Information and COLA history
• SSA: The 2026 OASDI Trustees Report, Table V.C1
• SSA: Trustees Report press release, June 9, 2026
• SSA Office of the Chief Actuary: Provisions Affecting Taxation of Benefits
• BLS: Schedule of Releases for the Consumer Price Index
• BLS: September 2025 CPI Release Rescheduled
• IRS: Schedule SE (Form 1040), 2025 and 2026 draft
• IRS: 2025 Instructions for Schedule SE
• IRS: Publication 15 (2026), Employer's Tax Guide
• IRS: Publication 505 (2026), Tax Withholding and Estimated Tax
• IRS: Form 1040-ES (2026)
• IRS: Schedule 3 (Form 1040), 2025
• IRS: 2025 Instructions for Form 1040, Schedule 3 line 11
• IRS: Form 8959 (2025)
• IRS: 2025 Instructions for Form 1120-S
• 42 U.S.C. §430, Adjustment of contribution and benefit base
• IRC §3101, Rate of tax on employees and §3111, Rate of tax on employers
• IRC §3121, Definitions (wages above the contribution and benefit base)
• IRC §1401, Rate of tax on self-employment income
• IRC §1402, Definitions (net earnings and self-employment income)
• IRC §164(f), Deduction for one-half of self-employment taxes
• IRC §31(b), Credit for special refunds of social security tax and §6413(c), Special refunds
• IRC §3231, Definitions (railroad tier 1 applicable base)
• IRC §86, Social security and tier 1 railroad retirement benefits
• IRC §151(d)(5)(C), Deduction for seniors
• Treasury Regulation §1.1402(b)-1, Self-employment income
• Treasury Regulation §1.31-2, Credit for special refunds of employee social security tax

This guide is for general educational purposes and does not constitute tax, legal, or accounting advice. The 2026 wage base of $184,500 is official; the 2027 wage base used here is a projection from the 2026 Social Security Trustees Report and will be replaced by the amount SSA announces in October 2026. Line numbers follow the 2025 Schedule SE, Schedule 3, and Form 8959 and the 2026 draft Schedule SE as posted on irs.gov when this article was last reviewed on September 29, 2026. For advice specific to your situation, consult a qualified tax professional.