Is U.S. Social Security Taxable in Italy? Why the Answer Is (Almost) Always Yes

The Governing Rule: Residence-Country Taxation, With a Citizenship Gate

Two rules decide the outcome and pull in opposite directions. The treaty assigns the right to tax a social security pension to the country where the recipient lives,¹ so an Italian resident’s U.S. Social Security is Italy’s to tax; but the treaty also preserves the right of the United States to tax its own citizens as if it did not exist, through the saving clause.² The United States already exempts the benefits of people who live in Italy, on the basis that the residence country should tax them,³⁴ yet it attaches a condition to Italy that it attaches to no other country: a U.S. citizen reaches that exemption only if he or she is also an Italian citizen.³ That condition is the saving clause at work, because the carve-out that would otherwise hand Social Security to the residence country is, for Italy, open to a U.S. citizen only when Italian citizenship is present too.²

The practical map is therefore:

• Resident of Italy who is not a U.S. citizen (Italian or other-country national): Social Security is exempt from U.S. tax and taxable only in Italy. The benefit administrator stops withholding U.S. tax once Italian residence is established under the treaty.³
• Resident of Italy who holds both U.S. and Italian citizenship: the same. The United States cedes the benefit and Italy taxes it.
• Resident of Italy who is a U.S. citizen but not an Italian citizen: the saving clause keeps the benefit taxable in the United States, where up to 85 percent of it is included in income,⁵ while Italy also taxes it as the country of residence. The result is concurrent taxation, resolved through the foreign tax credit rather than through exemption.²

Not All “Social Security” Is the Same Benefit

The rule above applies to contributory Social Security: the monthly retirement, survivor, and disability benefits earned through payroll contributions, all taxed alike where the recipient lives, subject to the citizenship gate above.⁶ One point on that list carries a trap: disability (SSDI) is a contributory benefit that follows the retirement rule, but not every “disability” payment is SSDI, as the separate discussion below explains.³

Two categories sit outside the rule and are routinely confused with it:

• Supplemental Security Income (SSI) is administered by the same agency but funded from general revenue and means-tested, not earned through contributions. It is not a Social Security benefit and is not taxable at all,⁷ it sits outside the U.S.-Italy totalization framework,⁸ and it generally cannot be paid to someone living abroad, so it rarely reaches an Italian return. It is not a social security pension for treaty purposes.
• Government-service pensions, including civil service, military retired pay, and state or local government pensions paid for past government service, are taxable only in the United States, whatever the recipient’s residence.⁹ This is the mirror image of the Social Security rule, and confusing the two is the single most frequent error.

Private U.S. retirement income is a third track. Distributions from IRAs, 401(k)s, and similar voluntary arrangements are not Social Security; they too are taxed where the recipient lives.¹¹⁰ The Italian tax authority took exactly this line when it treated the payout of a U.S. voluntary pension fund to an Italian-resident heir as taxable only in Italy, held the U.S. withholding to be contrary to the treaty, and pointed the taxpayer to a U.S. refund claim or, failing that, the treaty’s mutual agreement procedure.¹¹¹²

Disability Income Is the Most Error-Prone Category

Disability is where the analysis breaks down most often, because disability income is not one thing. The four common forms are taxed under four different rules, and the payment has to be sorted into the right category before any treaty question is asked.

SSDI behaves like Social Security. It is computed on the same basis as retirement benefits,³ so it is taxed where the recipient lives, subject to the same dual-citizenship gate. For an Italian resident, SSDI is Italian-taxed pension income unless the recipient is a U.S.-only citizen, in which case the saving clause keeps it taxable in the United States as well.²

Underneath the U.S. rules sit two different ideas of what disability pay is for. Money that replaces lost earnings is generally taxable, like the wages it stands in for; money that compensates for the permanent loss of a body part or its use, paid without regard to time missed from work, is generally tax-free, because it pays for something the person lost rather than for income.¹³

Employer or insurance disability pensions do not behave like Social Security. A disability pension funded by an employer is taxed in the United States as wages until the recipient reaches minimum retirement age, and only becomes pension income from that point on.¹⁴ That shift is not cosmetic in a cross-border file: while the payment counts as wages it is governed by the treaty’s rule for employment income,¹⁵ and it moves to the rule for pensions at minimum retirement age.¹ Because the dual-citizenship condition attaches only to the social security pension, not to wages or private pensions, the same person can face a different allocation between the two countries before and after that birthday.

Government disability annuities are a separate track again. A federal civil-service disability annuity is taxed as wages until minimum retirement age and as an annuity afterward,¹⁶ but because it is paid for past government service it is taxable only in the United States, regardless of that shift or of Italian residence.⁹

Two more forms drop out of the Italian base entirely: veterans’ disability benefits, which are not taxable at all,⁷ and SSI, the means-tested welfare benefit.

It is worth being clear about why no Italian ruling addresses U.S. disability benefits by name. The tax authority has built a consistent line that settles the characterization generically. Italian law treats foreign pension income of every kind as pension income, including one-off sums paid in return for contributions even when they are not linked to the end of a job,¹⁷¹⁸ and the authority has applied that reading repeatedly to U.S.-source retirement money, including payouts from U.S. pension funds.¹⁹¹¹²⁰ The consequence is that Italy does not import the U.S. wages-versus-pension distinction that turns on minimum retirement age. It characterizes the income by what it is at source, a payment under a foreign pension or social security system, and taxes it as pension income whatever the United States calls it. Foreign disability pensions are handled the same way.²¹

The retroactive lump sum is also less open than it first looks on the Italian side. SSDI often arrives as a large arrear covering several prior years, and Italian law already has a settled mechanism for back payments, taxing them separately from current income.²² The real difficulty is the seam between the two systems. U.S. rules let the recipient spread the arrear back over the years it relates to,⁵ while Italy taxes the whole sum in the year it is received. That mismatch in both timing and method is where the foreign tax credit stops lining up, and it should be modeled rather than assumed away.

Where the Law Is Genuinely Unresolved

Three areas resist a clean answer.

First, the U.S.-only citizen who lives in Italy. The treaty gives Italy the residence-country right and the saving clause preserves the U.S. right, so both claims are valid at the same time. Credit is supposed to neutralize the double tax, but it is imperfect: Italy taxes Social Security as ordinary pension income at rates reaching 43 percent, the United States taxes up to 85 percent of the benefit, and the order in which the credits apply does not always produce a full offset. No Italian ruling resolves the credit mechanics for this pattern.

Second, there is still no Italian ruling squarely on U.S. Social Security retirement income. The authority’s guidance on the social security pension has grown up around other treaties and around neighbouring U.S. items, such as employer Medicare and medical-insurance contributions, which it has held not taxable in Italy.²³ Advisers are extrapolating from the treaty text and from U.S. guidance rather than applying an Italian ruling on point.

Third, on disability the open question is the cross-border seam rather than the Italian label, which is settled by analogy. When the United States treats a payment as wages before minimum retirement age while Italy already treats it as a pension, the two countries may reach for different treaty rules on the same income; and when a lump sum is spread over prior years in the United States but taxed separately on receipt in Italy, the credit does not compute cleanly. A careful file documents the basis for the position it takes rather than asserting certainty.

Why Many Commercialisti Get This Wrong

The errors are predictable, and they cluster around four confusions.

The most common is treating Social Security as a government pension. Because it is paid by a state agency, advisers assume it is a public pension taxable only in the United States. It is not. A government pension is paid for past government service and is indeed taxable only at source; Social Security is contributory insurance and is taxable where the recipient lives.⁹¹ The allocation itself is settled, private pensions to the country of residence and public-service pensions to the paying country, and the Italian and EU courts have confirmed it.²⁴ The mistake is not in the rule but in filing Social Security under the wrong one.

The second is importing the logic of other treaties. Some Italian treaties, including the one with France, leave social security pensions taxable in both countries, and the authority has read the French treaty exactly that way.²⁵ An adviser who applies that source-country reflex to the United States lands on the wrong answer, because the U.S. treaty assigns the income to the country of residence and gates it on citizenship. The treaties are not interchangeable, and the social security pension is one of the provisions where their wording diverges most.

The third is treating U.S. withholding as proof of where the income belongs. Tax withheld at source in the United States does not establish a U.S. right to tax under the treaty, as the pension-fund ruling above shows.¹¹ Reading the benefit statement or the U.S. withholding form as the last word leads to over-taxation in the United States and under-reporting in Italy.

The fourth is confusing the totalization agreement with the tax treaty. The totalization agreement decides which country a worker pays social security contributions to and how periods of coverage combine for eligibility;⁸ it says nothing about how a benefit is taxed once it is paid. That is the tax treaty’s job alone. Citing the totalization agreement on a taxation question is a category error.

The 7 Percent Regime Applied to Social Security

A new resident pensioner can elect a flat 7 percent substitute tax, in place of IRPEF, on all foreign-source income, U.S. Social Security included.²⁶ Social Security qualifies on both counts the regime turns on: it is foreign-source pension income, which is the income that admits a person to the regime, and it is then among the foreign income the 7 percent rate reaches.²⁶²⁷ The option is made in the return for the year residence is transferred, applies to that year and the following nine, and is paid in a single instalment by the income-tax balance date.²⁶ It requires no Italian residence in the prior five years, transfer from a country that exchanges tax information, and residence in a qualifying municipality in Sicily, Calabria, Sardinia, Campania, Basilicata, Abruzzo, Molise, or Puglia, or a designated earthquake-zone municipality; the population ceiling for those municipalities was raised from 20,000 to 30,000 in March 2026.²⁶²⁸

The interaction with the U.S. side follows the citizenship analysis above. Where the benefit is exempt from U.S. tax, for a non-U.S. citizen or a dual U.S.-Italian citizen, the 7 percent is the only tax on it. Where the recipient is a U.S.-only citizen, the saving clause keeps the benefit taxable in the United States, and the two charges must be reconciled by credit. The regime complicates that step: income taxed under it carries no Italian foreign tax credit, which survives only for the foreign States the taxpayer expressly excludes from the option.²⁶ The 7 percent itself is creditable against U.S. tax,²⁹ but it is small set against U.S. tax on up to 85 percent of the benefit, so a U.S.-only citizen usually keeps a residual U.S. liability. Because the option must be in place in the first Italian return after the move, it belongs in the pre-move plan rather than a later filing.

Practical Implications

For a client who receives U.S. Social Security and lives in Italy, settle three things in order: the type of benefit (contributory retirement, disability, or survivor, as opposed to SSI or a government pension); the client’s citizenship, since dual U.S.-Italian citizenship is what removes the U.S. claim; and the resulting pattern of taxation.

On the U.S. side, where the benefit qualifies, take the treaty position on the return and arrange for the benefit administrator to stop withholding once Italian residence is recognized.³ For a U.S.-only citizen who cannot reach the exemption, the benefit stays on the U.S. return and the work shifts to the foreign tax credit.

On the Italian side, report it as foreign pension income, with no tax withheld at source, so the liability is settled through the annual return and paid by F24.¹⁷ If the client has only just moved, weigh the 7 percent regime above before fixing a claiming-age decision, since it must be elected in the first Italian return.

One caution for the planning conversation: the decision of when to claim Social Security should be modeled with Italian tax built in, not as a U.S.-only calculation.

Notes & Sources

1. U.S.-Italy Convention to avoid double taxation (Washington, 23 August 1999; ratified by Legge 3 marzo 2009, n. 20), Article 18, social security pension provision. ↩
2. Same Convention, Article 1, saving clause, preserving each State’s right to tax its own citizens. ↩
3. IRS Publication 915 (2025), Social Security and Equivalent Railroad Retirement Benefits, including the country list noting that for Italy a U.S. citizen must also be an Italian citizen. irs.gov/publications/p915 ↩
4. IRS Publication 54 (2025), Tax Guide for U.S. Citizens and Resident Aliens Abroad. irs.gov/publications/p54 ↩
5. Internal Revenue Code §86, governing inclusion of Social Security benefits in income and the lump-sum election for prior-year benefits. ↩
6. IRS Publication 554 (2025), Tax Guide for Seniors, confirming Social Security benefits comprise retirement, survivor, and disability benefits and exclude SSI. irs.gov/publications/p554 ↩
7. IRS Publication 907 (2025), Tax Highlights for Persons With Disabilities, on SSI and veterans’ disability benefits. irs.gov/publications/p907 ↩
8. SSA POMS GN 01701.100 and GN 01701.135, U.S.-Italy Totalization Agreement; SSI and Medicare are excluded. policy.ssa.gov ↩
9. Same Convention, Article 19, pensions for government service, taxable only in the paying State. ↩
10. Same Convention, Article 22, other income, taxable in the State of residence. ↩
11. Agenzia delle Entrate, Risposta a interpello n. 290/2025, payout of a U.S. voluntary pension fund to an Italian-resident heir. agenziaentrate.gov.it ↩
12. Same Convention, Article 25, mutual agreement procedure. ↩
13. IRS Publication 525 (2025), Taxable and Nontaxable Income, distinguishing disability pay that replaces lost wages (taxable) from amounts paid for the permanent loss or loss of use of part of the body, computed without regard to time absent from work (excludable). irs.gov/publications/p525 ↩
14. IRS Publications 17 and 575 (2025): an employer-funded disability pension is taxed as wages until minimum retirement age and as pension income thereafter. irs.gov/publications/p575 ↩
15. Same Convention, Article 15, income from employment. ↩
16. IRS Publication 721 (2025), Tax Guide to U.S. Civil Service Retirement Benefits, on disability annuities. irs.gov/publications/p721 ↩
17. Article 49, comma 2, lett. a) TUIR, treating foreign “pensioni di ogni genere” as employment-equivalent income. ↩
18. Agenzia delle Entrate, Circolare n. 21/E del 17 luglio 2020. ↩
19. Agenzia delle Entrate, Risposta a interpello n. 229/2024, liquidation of a U.S. pension fund. agenziaentrate.gov.it ↩
20. Agenzia delle Entrate, Risposta a interpello n. 292/2025, foreign pension income and the substitute regime. agenziaentrate.gov.it ↩
21. Agenzia delle Entrate, Risposta a interpello n. 385/2023, invalidity and survivor pension analyzed under the social security provision. agenziaentrate.gov.it ↩
22. Article 17, comma 1, lett. b) TUIR, separate taxation of arrears; Agenzia delle Entrate, Risposte a interpello n. 483/2019 and n. 367/2020. agenziaentrate.gov.it ↩
23. Agenzia delle Entrate, Risposta a interpello n. 124/2024, U.S. Medicare and medical-insurance contributions not taxable in Italy. agenziaentrate.gov.it ↩
24. Corte di Cassazione, ordinanza n. 3343 del 23 febbraio 2023; Court of Justice of the European Union, joined Cases C-168/19 and C-169/19. ↩
25. Agenzia delle Entrate, Risposta a interpello n. 113/2026, French social security pension taxable in both States. agenziaentrate.gov.it ↩
26. Article 24-ter TUIR (D.P.R. 917/1986): a flat 7 percent substitute tax on all foreign-source income for holders of foreign-source pension income under Article 49, comma 2, lett. a) who transfer residence to a qualifying municipality in Sicily, Calabria, Sardinia, Campania, Basilicata, Abruzzo, Molise, or Puglia, or to a designated seismic-zone municipality. Requires no Italian tax residence in the prior five years and transfer from a State with an administrative cooperation agreement; valid for the year of transfer plus the following nine; income covered by the option carries no Italian foreign tax credit, which survives only for foreign States expressly excluded from the option (comma 8). normattiva.it ↩
27. Agenzia delle Entrate, Risposta a interpello n. 616/2021, confirming a U.S. complementary pension (SEPP) as foreign pension income within the Article 24-ter regime. agenziaentrate.gov.it ↩
28. Article 26, comma 1, of Law no. 34 of 11 March 2026, raising the population ceiling for eligible municipalities from 20,000 to 30,000 inhabitants. ↩
29. IRS Publication 514 (2025), Foreign Tax Credit for Individuals. irs.gov/publications/p514 ↩

This article is general information, not tax or legal advice. The treatment of any specific benefit depends on the facts, the benefit type, and the recipient’s citizenship and residency. Contact JSBC before acting.