FICA Tax in Puerto Rico: Rates, Form 1040-SS, and Penalties

FICA tax in Puerto Rico works the same way it does in any state: employees pay 6.2% for Social Security on wages up to $184,500 in 2026 and 1.45% for Medicare on all wages, and employers match both. Self-employed workers pay both halves, for a combined 15.3% on net earnings. What throws people off is that most bona fide residents of Puerto Rico owe no federal income tax on their island-source income, yet still owe FICA in full. You can end a year with zero income tax liability and still owe thousands in Social Security and Medicare tax.

Why FICA Applies When Federal Income Tax Often Does Not

Federal law defines “United States” and “State” to include Puerto Rico for FICA purposes. Under IRC Section 3121, the Commonwealth is treated like any state for Social Security and Medicare payroll taxes.¹ The IRS confirms that Puerto Rico employers are subject to FICA the same as mainland employers.²

The confusion comes from IRC Section 933, which excludes Puerto Rico-source income from federal income tax for bona fide residents who live on the island the entire tax year.³ That exclusion covers income tax only. Federal regulations make the point explicit for self-employment: Puerto Rico-source income counts toward net earnings from self-employment “despite the fact that, under section 933, such income may not be taken into account” for regular income tax.⁴

Rates for Employees and Employers

Every paycheck in Puerto Rico carries two FICA taxes. Social Security is 6.2% of wages, capped at the annual wage base. For 2026, that cap is $184,500; wages above it are not subject to the 6.2%.⁵ Medicare is 1.45% on all wages, no cap.⁶

Employers match both: 6.2% for Social Security and 1.45% for Medicare on every dollar of covered wages, out of their own funds.⁷ Combined, that’s 15.3% on wages up to the Social Security cap and 2.9% on wages above it. Employers in Puerto Rico also owe FUTA, an employer-only federal unemployment tax that is separate from FICA and does not come out of employee wages.²

Additional Medicare Tax for High Earners

A 0.9% Additional Medicare Tax applies to wages above certain thresholds: $200,000 for single filers, $250,000 for married filing jointly, and $125,000 for married filing separately.⁶ The IRS confirms it also applies to self-employment income reported on Form 1040-SS, the return Puerto Rico residents use.⁸ Employers do not match this one; the employee pays the full 0.9%.

Self-Employment Tax

If you work for yourself in Puerto Rico, you pay both halves of FICA through self-employment tax. IRC Section 1401 sets the rate at 12.4% for Social Security and 2.9% for Medicare, for a total of 15.3% of net self-employment earnings.⁹ The Social Security portion applies only up to the same $184,500 wage base, reduced by any wages you also earned as an employee that year.⁵

The tax kicks in once net earnings hit $400 for the year. Below that, no self-employment tax is due, even if you have no other filing obligation.¹⁰ Self-employed workers who cross the Additional Medicare Tax thresholds owe the 0.9% surtax on the excess as well.⁹

Every year of self-employment tax payments builds credits with the Social Security Administration that determine your eligibility for retirement benefits and Medicare later on. Skipping payments doesn’t just create a tax debt. It erodes the benefits you’d otherwise qualify for.

One partial offset: you can deduct half of your self-employment tax when calculating adjusted gross income. IRC Section 164(f) allows the deduction for the 12.4% Social Security portion and the 2.9% base Medicare portion, but not for the 0.9% Additional Medicare Tax.¹¹ For residents who owe little or no federal income tax, the deduction has limited practical value; it can matter if you have U.S.-source income or a dual filing obligation.

Filing Form 1040-SS and Paying Quarterly

Self-employed residents of Puerto Rico report earnings and calculate self-employment tax on Form 1040-SS. The IRS discontinued Form 1040-PR, the Spanish-language version, starting with tax year 2023, so all filers now use Form 1040-SS regardless of language preference.¹² The form serves Puerto Rico and other U.S. territory residents who aren’t required to file a standard federal income tax return.¹³ You need a valid Social Security number. The annual deadline is April 15.

Waiting until April usually isn’t an option. The IRS expects quarterly estimated payments throughout the year, and Puerto Rico residents now use the standard Form 1040-ES for those payments; Form 1040-ES(PR) was discontinued starting with tax year 2024.¹⁴ The four deadlines for the 2026 tax year are:

First quarter (January through March): April 15, 2026
Second quarter (April through May): June 15, 2026
Third quarter (June through August): September 15, 2026
Fourth quarter (September through December): January 15, 2027

If a deadline falls on a weekend or federal holiday, payment is due the next business day.¹⁵ The Electronic Federal Tax Payment System (EFTPS) is the simplest way to schedule payments and gives immediate confirmation numbers worth saving.

Penalties for Falling Behind

File late as a self-employed taxpayer and the IRS charges 5% of the unpaid tax for each month or partial month the return is overdue, up to 25%. If the return is more than 60 days late, the minimum penalty for tax year 2026 is $525 or 100% of the tax owed, whichever is less.¹⁶

Failing to pay adds a separate penalty of 0.5% per month on the unpaid balance, also capped at 25%. That rate rises to 1% if you still haven’t paid 10 days after the IRS issues a notice of intent to levy. Entering an installment agreement drops the rate to 0.25% per month, provided you filed on time.¹⁶

Trust Fund Recovery Penalty

Employers face a harsher consequence. FICA withheld from employee paychecks is a trust fund tax; the employer holds it on behalf of the government. An employer who withholds and fails to turn it over can be hit with the Trust Fund Recovery Penalty under IRC Section 6672, equal to 100% of the unpaid amount. Withhold $10,000 and fail to remit, and you owe $10,000 plus a $10,000 penalty.¹⁷ The IRS can pursue any individual responsible for payroll, not just the business entity.

Records to Keep

The IRS generally expects taxpayers to keep business records for at least three years from the date the return was filed. Employment tax records have a longer retention requirement of four years.¹⁸ For the self-employed, that means holding onto bank statements, invoices, receipts, mileage logs, and any documentation of gross income for at least three years after you file Form 1040-SS. Employers should keep payroll records, W-2 forms, and proof of FICA deposits for four years.

1
Office of the Law Revision Counsel. 26 USC 3121 – Definitions
2
Internal Revenue Service. Topic No. 903, U.S. Employment Tax in Puerto Rico
3
Office of the Law Revision Counsel. 26 USC 933 – Income From Sources Within Puerto Rico
4
eCFR. 26 CFR 1.1402(a)-9 – Puerto Rico
5
Social Security Administration. Contribution and Benefit Base
6
Office of the Law Revision Counsel. 26 USC 3101 – Rate of Tax
7
Office of the Law Revision Counsel. 26 U.S. Code 3111 – Rate of Tax
8
Internal Revenue Service. Topic No. 560, Additional Medicare Tax
9
Office of the Law Revision Counsel. 26 USC 1401 – Rate of Tax
10
Office of the Law Revision Counsel. 26 USC 1402 – Definitions
11
Office of the Law Revision Counsel. 26 U.S. Code 164 – Taxes
12
Internal Revenue Service. Instructions for Form 1040-SS
13
Internal Revenue Service. About Form 1040-SS, U.S. Self-Employment Tax Return
14
Internal Revenue Service. About Form 1040-ES (PR), Estimated Federal Tax on Self Employment Income
15
Internal Revenue Service. Estimated Tax
16
Internal Revenue Service. Topic No. 653, IRS Notices and Bills, Penalties and Interest Charges
17
Office of the Law Revision Counsel. 26 USC 6672 – Failure to Collect and Pay Over Tax, or Attempt to Evade or Defeat Tax
18
Internal Revenue Service. Taking Care of Business: Recordkeeping for Small Businesses