Interest paid on Puerto Rico bonds is tax exempt at the federal, state, and local level for investors in every U.S. state. That is broader than the exemption on ordinary municipal bonds, which usually shields state income tax only for residents of the issuing state. The catch is that the exemption covers interest and nothing else: capital gains, certain kinds of discount income, and several income-based calculations you might assume are unaffected still apply.
Why the Exemption Works in Every State
The exemption comes from federal law, not from any deal between states. The Jones-Shafroth Act of 1917, codified at 48 U.S.C. § 745, exempts all bonds issued by the Government of Puerto Rico or under its authority from taxation at every level of U.S. government: federal, state, territorial, and local.1Office of the Law Revision Counsel. 48 USC 745 Tax Exempt Bonds Because the protection sits in federal statute, no state legislature can override it.
Compare that with an ordinary muni. A California bond is federally tax exempt for everyone, but only California residents skip California income tax on the interest.2Municipal Securities Rulemaking Board. Municipal Bond Basics A Texan holding that same bond gets no state-level benefit worth the name. Puerto Rico bonds ignore that residency limit. An investor in New York City, where combined state and city income taxes can exceed 12%, sees the same full exemption as someone in a no-income-tax state. If you move between states, the exemption follows you, because it never depended on where you lived to begin with.
Where the Exemption Stops
Only interest is exempt. Sell a Puerto Rico bond at a profit and you owe capital gains tax like on any other investment. Long-term gains reach 20% federally for high earners, and short-term gains on bonds held a year or less are taxed at ordinary rates up to 37%.3Internal Revenue Service. Topic No. 409, Capital Gains and Losses State capital gains tax stacks on top in most states.
Original Issue Discount
When a Puerto Rico bond is issued below face value, the shortfall is original issue discount (OID). For a tax-exempt bond, OID is treated as tax-exempt interest that accrues gradually over the bond’s life. You don’t pay tax on it as it accrues, but you do have to add it to your cost basis each year.4Internal Revenue Service. Publication 1212 – Guide to Original Issue Discount (OID) Instruments If you sell before maturity with the wrong basis, you’ll either overstate the gain and overpay or understate it and hear from the IRS.
Market Discount Is Different
Buying a Puerto Rico bond on the secondary market below its adjusted issue price creates market discount, and market discount on a tax-exempt bond is not tax exempt. When you sell or the bond matures, the portion of your gain attributable to accrued market discount is taxed as ordinary income, not at capital gains rates. Investors regularly miss this because they assume every kind of discount on a tax-exempt bond gets tax-exempt treatment.
There is a de minimis safe harbor. If total market discount is less than 0.25% of face value multiplied by the full years remaining to maturity, the IRS treats the discount as zero and any gain qualifies for capital gains treatment. Bonds bought only slightly below par often fit inside that threshold.
Tax Interactions Most Investors Miss
Because Puerto Rico bond interest never appears as taxable income, it’s easy to assume it simply doesn’t count. Several important calculations count it anyway.
Social Security Benefits
The IRS decides how much of your Social Security is taxable by computing “provisional income,” and the underlying statute expressly adds back interest that is exempt from tax when building that figure.5Office of the Law Revision Counsel. 26 USC 86 Social Security and Tier 1 Railroad Retirement Benefits Puerto Rico bond interest is included.6Internal Revenue Service. Social Security Income A large enough tax-exempt bond portfolio can push provisional income above the thresholds where up to 85% of Social Security benefits become taxable.
Medicare Premium Surcharges
Medicare Part B and Part D premiums rise for higher-income beneficiaries through the Income-Related Monthly Adjustment Amount (IRMAA). IRMAA is calculated from modified adjusted gross income, which includes tax-exempt bond interest. Enough Puerto Rico bond interest can lift you into a higher IRMAA bracket and add hundreds or thousands of dollars a year to your premiums. The calculation uses income from two years prior, so a decision this year shows up in your premium two years later.
Net Investment Income Tax
Here the news runs the other way. The 3.8% Net Investment Income Tax does not apply to tax-exempt bond interest; the IRS excludes tax-exempt state and municipal bond interest from net investment income.7Internal Revenue Service. Net Investment Income Tax Capital gains on the sale of a Puerto Rico bond, though, are included in net investment income and can be hit by the surtax.
Borrowing to Buy the Bonds
If you use a loan or margin to buy Puerto Rico bonds, the interest you pay on that debt is not deductible. Federal law disallows deductions for interest on debt incurred to purchase or carry obligations that produce tax-exempt income.8Office of the Law Revision Counsel. 26 US Code 265 – Expenses and Interest Relating to Tax-Exempt Income The same rule reaches investment advisory fees allocated to managing a tax-exempt bond portfolio.
Reporting It on Your Return
Even though the interest is not taxable, the IRS requires you to report it, describing this as “an information-reporting requirement only” that “doesn’t convert tax-exempt interest into taxable interest.”9Internal Revenue Service. Topic No. 403, Interest Received Skipping the line invites an IRS notice, because your brokerage has already filed the same numbers.
After year-end, your brokerage sends Form 1099-INT. Tax-exempt interest sits in Box 8, the box specifically for exempt-interest income.10Internal Revenue Service. Instructions for Forms 1099-INT and 1099-OID For OID bonds, look at Boxes 2 and 11 on Form 1099-OID. Brokerage statements usually include a supplemental breakdown by jurisdiction so you can confirm the Puerto Rico portion is categorized correctly. If you sold bonds during the year, Form 1099-B shows sale proceeds and cost basis for the capital gain or loss calculation.
Report the total from Box 8 of Form 1099-INT on Line 2a of Form 1040.11Internal Revenue Service. Instructions for Schedule B (Form 1040) The amount stays off Line 2b, where taxable interest goes, but remains visible on the return. The IRS uses it for the Social Security taxability calculation and for eligibility for various credits.
Schedule B is required if you received more than $1,500 in taxable interest or ordinary dividends from other sources, and it is also required if you have accrued bond interest or are amortizing bond premium, regardless of amount.12Internal Revenue Service. About Schedule B (Form 1040), Interest and Ordinary Dividends Tax software handles most of this from the 1099 entries, but paper filers place the exempt figure on Line 2a themselves.
One common adjustment: if you bought a Puerto Rico bond between interest payment dates, you paid accrued interest to the seller as part of the purchase price. Your first interest payment then includes that accrued portion, and the 1099-INT can overstate your actual interest income. The IRS instructions let you subtract the accrued interest you paid by listing it on Schedule B as “Accrued Interest.”13Internal Revenue Service. Instructions for Schedule B (Form 1040)
Tax Exempt Is Not Risk Free
The exemption says nothing about whether you get your money back. Puerto Rico accumulated more than $70 billion in debt and over $55 billion in unfunded pension liabilities before losing access to capital markets. Congress passed PROMESA in 2016, creating a Financial Oversight Board and a restructuring process similar to municipal bankruptcy. The Commonwealth’s main plan of adjustment took effect in March 2022 and cut liabilities substantially; across all entities, total debt fell from over $70 billion to roughly $37 billion.14Financial Oversight and Management Board for Puerto Rico. Debt General obligation bondholders received only a fraction of the face value of their original holdings.
New bonds issued as part of the restructuring keep their triple tax-exempt status under 48 U.S.C. § 745 because they are still issued by the Government of Puerto Rico or its authority.1Office of the Law Revision Counsel. 48 USC 745 Tax Exempt Bonds The Puerto Rico electric power authority (PREPA) restructuring remains unresolved as of 2026. The tax treatment is a benefit; the credit quality is a separate question, and worth evaluating on its own before you buy.