If you work for yourself in Puerto Rico, the Departamento de Hacienda (Puerto Rico's Treasury Department, "Hacienda") is not the only agency that collects from you. Your Puerto Rico–source income may not owe federal income tax, but it does owe self-employment tax, which funds Social Security and Medicare. This calculator estimates your share under the Form 1040-SS rules.
How to use it
- Enter your net earnings from self-employment. This is what is left from your business or profession after you subtract business expenses, figured under the federal rules (those of Schedule C of Form 1040). The default is $40,000.
- Choose the year: 2025 or 2026. The year changes the Social Security cap.
- Read the result: the taxable base, the Social Security portion, the Medicare portion and the total.
If you were also an employee and had Social Security withheld on a 499R-2/W-2PR wage statement, the cap is shared between your wages and your self-employment earnings. The calculator does not make that adjustment. See the limitations below.
How it is calculated
Who pays
You must file Form 1040-SS if you had net earnings from self-employment of $400 or more, you do not have to file a federal income tax return (Form 1040), and you are a resident of Puerto Rico or another territory, according to the IRS instructions. The tax applies regardless of your age, even if you already receive Social Security or Medicare.
The three steps
- Taxable base: net earnings × 92.35%. This factor exists because the calculation takes out the "employer" share of the tax up front.
- Social Security: 12.4% of the base, but only up to the year's cap.
- Medicare: 2.9% of the full base, with no cap.
| Year | Social Security | Medicare | Social Security cap |
|---|---|---|---|
| 2025 | 12.4% | 2.9% | $176,100 |
| 2026 | 12.4% | 2.9% | $184,500 |
The caps come from the Social Security Administration and appear in the 2025 Form 1040-SS instructions.
The deductible half
In the federal system, people who file Form 1040 can deduct half of this tax when they figure their income. The calculator shows you that half for reference. But if you are a bona fide resident of Puerto Rico and file only Form 1040-SS, you have no federal income tax return to use it on. For your Hacienda return, ask your tax professional how to treat this payment.
Example with the default values
Hypothetical case: a graphic designer in Puerto Rico with $40,000 of net self-employment earnings in 2026 and no wages from a job.
- Taxable base: $40,000 × 92.35% = $36,940.00
- Social Security: $36,940 × 12.4% = $4,580.56 (the base is below the $184,500 cap)
- Medicare: $36,940 × 2.9% = $1,071.26
- Self-employment tax: $5,651.82
- Half, for federal reference only: $2,825.91
The tax would be the same under the 2025 rules, because the base does not reach either cap. It is filed on the 2026 Form 1040-SS, which is due April 15, 2027.
Form 1040-SS
- It is the form for Puerto Rico residents. The IRS discontinued Form 1040-PR starting with tax year 2023. Residents now use Form 1040-SS, which is also available in Spanish as Form 1040-SS (sp).
- It is also used to claim the Additional Child Tax Credit, even if you owe no self-employment tax. Read about the child tax credit.
- Dates: the 2025 form was due April 15, 2026, with an automatic six-month extension to October 15, 2026 if you filed Form 4868. The 2026 form is due April 15, 2027.
- Estimated payments: if you expect to owe $1,000 or more, you may have to make estimated payments with Form 1040-ES, which replaced Form 1040-ES(PR) starting in 2024.
For the full picture, read self-employment tax in Puerto Rico and Puerto Rico residents and the IRS.
Limitations
- It does not coordinate with wages. If you had wages subject to Social Security, the $184,500 cap (2026) is reduced by those wages. The calculator assumes you had no wages.
- It does not include the 0.9% Additional Medicare Tax for high incomes, which is figured on Form 8959.
- It does not calculate the optional methods for low earnings or losses. For 2025, the maximum income for using those methods is $7,240.
- It does not figure your net earnings for you. You must arrive at them using the federal rules of Schedule C or F.
- It does not calculate your Hacienda tax. That goes on the income tax return (planilla, Form 482). Use the income tax calculator and read about self-employed workers.
If you are married and both of you are self-employed, each spouse figures the tax separately on their own net earnings, even if you file a single joint Form 1040-SS.
Frequently asked questions
Do I have to pay federal Social Security tax if I already pay Hacienda?
Yes. They are two separate systems. Hacienda collects income tax. The IRS collects self-employment tax for Social Security and Medicare, which applies to Puerto Rico residents the same way it does in the states.
What if my net earnings are less than $400?
You do not owe self-employment tax for that year. You could still file Form 1040-SS to claim the Additional Child Tax Credit if you qualify.
Does paying this tax help me in the future?
Yes. The Social Security Administration uses what you report on Form 1040-SS to figure your credits and your retirement, disability and Medicare benefits. If you do not file, you could miss out on those credits.
Does the cap apply to Medicare?
No. The $184,500 cap (2026) applies only to the 12.4% Social Security portion. The 2.9% Medicare portion is paid on the full base.
Where do I file Form 1040-SS?
You can file it electronically or by mail, according to the IRS instructions. The instructions for the relevant year give the mailing address and the electronic payment options.
Sources
787TAX is an independent guide. It is not Puerto Rico's Departamento de Hacienda, the CRIM or the IRS. This page is general information, not tax or legal advice. Example figures are hypothetical. Found an error? Tell us.
