Social Security Administration: What It Means for Employers

What it means in practice

What the agency is. Section 701 of the Social Security Act, codified at 42 U.S.C. 901, establishes the SSA "as an independent agency in the executive branch" and gives it the duty to administer the OASDI program under title II and the SSI program under title XVI. Its independence took effect March 31, 1995. Under 42 U.S.C. 902, the agency is headed by a Commissioner of Social Security appointed by the President with the advice and consent of the Senate for a six-year term. For an employer, the SSA is the agency that receives annual wage reports, keeps the record of each worker's covered earnings and issues the numbers used to identify those records.

How the work is split with the IRS. The two agencies divide payroll-related duties. IRS Publication 963, the Federal-State Reference Guide produced by SSA, the IRS and the National Conference of State Social Security Administrators, says the SSA administers the Social Security Act, administers benefits and maintains individual earnings records, while the IRS administers the Internal Revenue Code, including the Federal Insurance Contributions Act, and collects the taxes. In other words, the employer withholds and pays Social Security tax under the FICA rules to the IRS, and reports each employee's wages to the SSA. Publication 963 sends questions about tax collection, worker classification, Forms 941 and 944, and how to complete Forms W-2 and W-3 to the IRS, and questions about benefits, earnings records and quarters of coverage, Form W-2 records and Social Security number problems to the SSA.

How a wage report reaches the record. Under 42 U.S.C. 432, the Treasury makes information returns available to the Commissioner, the two agencies may agree on how the SSA processes them, and the Commissioner must process the withholding statements it receives. The SSA regulation at 20 CFR 422.114 describes the result: employers are told by the IRS to file annual wage reports with the SSA on Forms W-2 and W-3, and the SSA processes them "for updating to SSA's earnings records and IRS tax records," identifies reporting errors and late forms for IRS penalty action, and also processes corrected Forms W-2c and W-3c. Publication 963 adds that the SSA shares the wage data with the IRS. The employer's filing on the W-2 form is therefore both the IRS information return and the source of the worker's Social Security earnings history.

Filing with the SSA. The General Instructions for Forms W-2 and W-3 (2026) say the SSA's Business Services Online (BSO) site lets employers create up to 50 Forms W-2 or 25 Forms W-2c online, generates Form W-3 automatically, and accepts uploaded wage files for larger volumes. An employer must e-file if it files at least 10 information returns in total for the year. The SSA accepts only e-filed reports and the official red-ink paper forms or approved substitutes, so Copy A printed from IRS.gov cannot be filed. Payments, Form 941 and Forms 1099 go to the IRS, never to the SSA. Publication 15 says BSO users need a Social Security online account using a Login.gov or ID.me credential.

Earnings records. Under 42 U.S.C. 405(c)(2)(A), the Commissioner must establish and maintain records of the wages paid to each individual and the periods in which they were paid, and tell an individual what the records show on request. Publication 963 explains that when a worker or family member applies for benefits, the earnings record is used to decide eligibility and the benefit amount, which is why accurate names and numbers on wage reports matter. The record can be corrected freely only within the "time limitation" of 3 years, 3 months and 15 days after the year (42 U.S.C. 405(c)(1)(B) and (c)(4)). After that, 20 CFR 404.822 lists limited cases, such as correcting the record to agree with a tax return of wages or a state wage report.

Name and number mismatches. Under 20 CFR 422.120, if a wage report has no SSN, or a name or SSN that does not match SSA records, the SSA writes to the employee at the address on the report, or to the employer if the address is missing. The SSA notifies the IRS of reports filed without SSNs so the IRS can decide on penalties. Wages that cannot be matched go into a "Suspense File" of uncredited earnings until identifying information arrives. If 90 percent or more of the reports in a submission are unidentified or incorrect, the SSA may return the whole submission; the employer then has 45 days to resubmit, and the SSA may grant a 15-day extension (20 CFR 422.114(c) and 422.120(b)).

Reports the SSA rejects. The 2026 W-2 and W-3 instructions list conditions that cause the SSA to reject a paper or electronic report: Medicare wages and tips less than the sum of Social Security wages and tips; Social Security tax above zero with Social Security wages and tips of zero; and Medicare tax above zero with Medicare wages and tips of zero. Household employer reports are also rejected when wages fall below the household coverage threshold. The amounts reported to the SSA should also agree with the employer's Forms 941 for the year; the instructions say the IRS and SSA may contact employers about discrepancies.

Social Security numbers and SSNVS. Under 42 U.S.C. 405(c)(2)(B), the Commissioner assigns Social Security account numbers, and 20 CFR 422.103 explains that the name and number identify the record so wages can be posted to it. Publication 15 says the employee, not the employer, completes and signs Form SS-5 to apply for a card. Employers and authorized reporting agents may use the Social Security Number Verification Service (SSNVS), reached through BSO, to check that an employee's name matches an SSN. Publication 15 cautions that a person may have a valid SSN but not be authorized to work in the United States; work eligibility is handled through Form I-9 and E-Verify. More detail is on the Social Security number (SSN) page.

Annual determinations. Several payroll figures come from the SSA, not the IRS. Section 230(a) of the Act (42 U.S.C. 430) requires the Commissioner to publish the next year's contribution and benefit base in the Federal Register on or before November 1, and section 213(d)(2) (42 U.S.C. 413(d)) sets the same deadline for the quarter of coverage amount. The 2027 notice, published October 26, 2026, sets the taxable wage base at $192,300, a national average wage index for 2025 of $72,800.33, a domestic employee coverage threshold of $3,100 and an election worker threshold of $2,700. The IRS then uses the base in its employer guidance; it limits which pay counts as Social Security wages.

Quarters of coverage. A quarter of coverage, often called a credit, is the basic unit for deciding whether a worker is insured. Under 20 CFR 404.143, for years after 1977 the SSA credits one quarter for each part of a year's total wages and self-employment income that equals the amount for that year, up to four per year. Publication 963 notes that most people need 40 credits to qualify for benefits.

Prior-year pay reported in the current year. The W-2 instructions explain that box 11 lets the SSA see whether amounts reported for the year were earned in an earlier year, so it can apply the retirement earnings test correctly. Back pay and other special wage payments are reported to the SSA using Publication 957 and Form SSA-131.

Section 218 and state and local employers. Under 42 U.S.C. 418(a), the Commissioner must, at a state's request, enter into an agreement extending Social Security coverage to state and local government employees, and under section 418(g) no agreement may be terminated on or after April 20, 1983. Publication 963 says each state designates a State Social Security Administrator to act for it, and that since January 1, 1987, public employers have paid FICA taxes directly to the IRS like private employers.

Where states differ (examples). Coverage of public workers depends on each state's agreement and its modifications. In California, CalPERS states that it serves as the official State Social Security Administrator for the state's Section 218 Agreement, called the Master Agreement, and asks public agencies to complete an Annual Information Request within 30 days of notice. In Oregon, the state administrator sits within the Public Employees Retirement System, collects an administration fee from Section 218 employers, and reported more than 680 modifications to the original agreement as of 2024. Private employers follow the same federal rules in every state.

Step by step for an employer. (1) Record each new hire's name and SSN exactly as shown on the Social Security card, and verify through SSNVS where useful. (2) Withhold and deposit Social Security and Medicare tax with the IRS, applying the SSA's base for the year. (3) After year end, file Copy A of each Form W-2 with Form W-3 with the SSA, electronically if required. (4) Respond to SSA letters about unmatched names or returned files within the stated period. (5) File Form W-2c with Form W-3c with the SSA when a previously filed amount, name or SSN was wrong. (6) Update the wage base and other annual figures each January from the SSA notice and IRS guidance.

Example 1 (illustration): crediting quarters. A part-time employee is paid $7,000 of covered wages in 2027 and has no other earnings. Three quarters require $5,910 ($1,970 x 3) and four require $7,880 ($1,970 x 4), so the SSA credits three quarters of coverage for 2027. Had the same employee earned $7,880 or more, four would be credited, the yearly maximum.

Example 2 (illustration): the 2027 base. Section 230(b) multiplies the 1994 base of $60,600 by the ratio of the 2025 wage index ($72,800.33) to the 1992 index ($22,935.42). The notice shows the result as $192,353.14, rounded to the nearest multiple of $300, or $192,300. Because that exceeds the 2026 base of $184,500, it becomes the 2027 base.

Example 3 (illustration): a rejected report. A server's Form W-2 shows Social Security wages of $48,000, Social Security tips of $6,000, and Medicare wages and tips of $48,000. Because $48,000 is less than the $54,000 sum of Social Security wages and tips, the SSA would reject the report under the conditions in the W-2 instructions until the employer corrects the Medicare amount.

Question: Can an employee be paid before they have an SSN? Publication 15 says that if the employee has applied but has no number when Form W-2 is due, the employer enters "Applied For" on paper or zeros when e-filing, then files Form W-2c with the SSA once the number arrives.

Question: Does an employee name change need a correction? Publication 15 says to keep reporting under the old name until the employee shows an updated card, then file Form W-2c for the most recently filed Form W-2.

Question: Does a payroll provider take over the SSA filing duty? No. The W-2 instructions say a reporting agent or third-party payroll provider does not relieve the employer of responsibility for filing correctly and on time.

Recordkeeping. The W-2 instructions tell employers to keep a copy of Form W-3 and each Form W-2 Copy A for at least 4 years, along with reconciliation information in case the IRS or SSA asks about differences from Forms 941.

This entry describes federal rules only and does not decide whether a particular worker or payment is covered or how a benefit will be computed.

Why it matters and common mistakes

How Remindax helps

Related terms

See all terms in Payroll Tax & Withholding or browse the full HR Glossary.