How you pay into Social Security depends on how you earn your money. If you work for an employer, 6.2% of your wages is withheld from each paycheck under the Federal Insurance Contributions Act (FICA) and sent to the federal government on your behalf, with your employer paying a matching 6.2%. If you’re self-employed, you owe both halves yourself and pay them with your federal tax return, usually through quarterly estimated payments. Household employers who cross a wage threshold also handle their own filings. In 2026, Social Security tax applies only to earnings up to a wage base of $184,500.
If You’re an Employee
Your employer withholds 6.2% of your gross wages each pay period for Social Security and remits it directly. The employer pays a matching 6.2%, for a combined 12.4%. Medicare adds another 1.45% from you and 1.45% from your employer, and Medicare has no wage cap.
The withholding stops for the year once your wages reach $184,500 in 2026. You don’t calculate anything, submit anything, or file a separate Social Security form. Your W-2 at year’s end documents what was withheld. Your only real task is checking that pay stubs and the W-2 reflect the right numbers.
Working More Than One Job
Each employer withholds independently and doesn’t coordinate with the others. If your combined wages across jobs exceed $184,500, you’ll overpay Social Security tax during the year. You can claim the excess as a credit on your federal income tax return. Nobody else will flag this for you.
If You’re Self-Employed
Under 26 U.S.C. ยง 1401, self-employed workers pay both the employee and employer shares. That’s 12.4% for Social Security plus 2.9% for Medicare, for a combined self-employment tax rate of 15.3% on net earnings.
You owe self-employment tax once your net earnings from self-employment reach $400 for the year. Net earnings means gross business income minus allowable business expenses. The Social Security portion applies only up to the $184,500 wage base; the Medicare portion has no cap.
The Half Deduction
You can deduct half of your self-employment tax when calculating adjusted gross income. This goes on Schedule 1 of Form 1040. It reduces your income tax, not the self-employment tax itself. The logic is that employees never pay income tax on their employer’s matching share, so you shouldn’t either.
Additional Medicare Tax
Net self-employment income above $200,000 (single) or $250,000 (married filing jointly) triggers an extra 0.9% Medicare tax on the amount over the threshold. There’s no employer match on this piece; it falls entirely on you and gets calculated on Schedule SE alongside your regular self-employment tax.
If You Employ Someone in Your Home
Hiring a nanny, housekeeper, or home health aide can put you on the hook as a household employer. In 2026, the obligation triggers when you pay a single household employee $3,000 or more in cash wages during the calendar year. Below that, no Social Security or Medicare taxes are owed on those wages.
Once you cross $3,000, withhold the employee’s 6.2% Social Security and 1.45% Medicare shares from their pay and pay the matching employer portions yourself. Report everything on Schedule H, attached to your personal Form 1040. File a W-2 for the employee and send Copy A to the Social Security Administration. Keep employment tax records for at least four years after the return’s due date or the date you paid the taxes, whichever is later.
Forms You’ll Use
Employees generally file nothing separate; the W-2 covers it. Self-employed workers and household employers use several IRS forms:
- Schedule SE (Form 1040) walks self-employed filers through calculating net earnings and the exact Social Security and Medicare tax owed. The result flows to Form 1040.
- Form 1040-ES calculates quarterly estimated tax payments and includes vouchers for mailing.
- Schedule H (Form 1040) reports Social Security, Medicare, and federal unemployment taxes for household employees.
- Form 1040-V is the payment voucher you include if you mail a check or money order with your annual return.
All are available on the IRS website and can be filed electronically through most tax software. Before you start, gather your Social Security number, income records, and expense documentation. Your SSN links every dollar paid to your earnings record at the SSA; if it’s wrong on the return, the money may not be credited to you.
If you’re not eligible for an SSN, you can file using an Individual Taxpayer Identification Number (ITIN), but taxes paid under an ITIN don’t build a Social Security earnings record and won’t qualify you for retirement or disability benefits.
How to Submit the Payment
Employees submit nothing. Self-employed workers and household employers move the money to the Treasury themselves.
IRS Direct Pay is the simplest route for most individuals: a direct bank transfer with no registration and immediate confirmation. It’s the IRS’s current recommended method for individuals because the Electronic Federal Tax Payment System (EFTPS) no longer accepts new enrollments from individual taxpayers. If you already have an EFTPS account, you can keep using it. You can also pay through your IRS Online Account, which shows balances and payment history. Paper filers mail a check or money order with Form 1040-V to the address in the form’s instructions.
Quarterly Deadlines
Self-employed individuals generally pay estimated tax four times a year rather than in one April lump. The 2026 due dates:
- April 15, covering income earned January through March
- June 15, covering April and May
- September 15, covering June through August
- January 15 of the following year, covering September through December
Use Form 1040-ES to estimate each payment. If you expect to owe less than $1,000 for the year after withholding and credits, you can skip estimated payments.
What Happens if You Pay Late
The failure-to-pay penalty is 0.5% of the unpaid tax for each month or partial month the balance is outstanding, capped at 25%. The monthly rate doubles to 1% if you don’t pay within 10 days of an IRS notice of intent to levy. If you’re on an approved payment plan, the rate drops to 0.25% per month.
Employers who miss payroll tax deposits face a separate tiered penalty: 2% if 1 to 5 days late, 5% if 6 to 15 days late, 10% if more than 15 days late, and 15% after an IRS demand notice. The tiers don’t stack; a 20-day-late deposit pays 10%, not the sum.
Interest also accrues on unpaid balances. For the first quarter of 2026, the individual underpayment rate is 7% per year, compounded daily. The rate adjusts quarterly based on the federal short-term rate plus three percentage points.
How Your Payments Build Credits
Paying in is how you qualify for benefits. In 2026, one credit equals $1,890 in wages or self-employment income, up to four credits per year. Earning $7,560 in covered work during 2026 gives you the full four credits.
Retirement benefits require 40 credits, roughly 10 years of work. Disability benefits require fewer, depending on your age when you become disabled. Credits you’ve earned stay on your record permanently, but retirement payments don’t start until you hit 40.
Check your record. The SSA offers a free my Social Security account at ssa.gov showing year-by-year taxed earnings and projected benefits. If you see missing or wrong earnings, request a correction through the account or by calling 1-800-772-1213, with W-2s, pay stubs, or tax returns as backup. You generally have three years, three months, and 15 days after the year the wages were paid to request a correction. After that window closes, fixing the record gets much harder and requires meeting narrow exceptions.
Who’s Exempt
Most workers can’t opt out. Members of recognized religious groups that have existed continuously since December 31, 1950, and that conscientiously oppose insurance benefits can apply for exemption using IRS Form 4029, but approval requires permanently waiving all Social Security and Medicare benefits. Certain nonresident aliens, students working at their own university, and some state and local government employees covered by qualifying public retirement systems also fall outside the Social Security tax requirement.