When Italy treats you as a tax resident

Moving to Italy as an American means living under two tax systems at once. The United States taxes its citizens on worldwide income wherever they live. Italy taxes its residents on worldwide income too. So the first question for anyone planning a long stay is simple: at what point does Italy consider you a tax resident? Since 1 January 2024 the answer follows new rules, explained in detail by the Agenzia delle Entrate in Circular No. 20/E of 4 November 2024, which the agency also published in English.

The basic rule: most of the tax period

Italy's tax year is the calendar year. Under Article 2 of the income tax code (TUIR), as amended by Legislative Decree 209 of 27 December 2023, you are an Italian tax resident if, for most of the tax period, you meet at least one of these conditions:

• you have your residence in Italy within the meaning of the civil code, meaning your habitual abode;
• you have your domicile in Italy;
• you are physically present in Italy.

"Most of the tax period" means 183 days in a year, or 184 in a leap year. Fractions of a day count, and the days do not have to be consecutive. The circular states that physical presence can be shown through elements attesting material permanence in Italy, even if not continuous.

Meeting any one of the three tests is enough. That is the point many newcomers miss: you can be resident because of domicile even if you travel a lot, or because of physical presence even if you never sign a lease.

Domicile now means personal and family life

Before 2024, domicile was read through the civil code and often tied to economic interests. The 2023 decree gave it a specific tax definition: domicile is the place where a person's personal and family relationships mainly develop. The agency explains that this favors personal and family ties over purely economic ones.

According to the circular, "personal and family relationships" covers spouses and civil partners, and also stable relationships such as a couple living together. Stable social ties can also count if concrete evidence supports them; the circular gives the annual membership of a cultural or sports club as an example. If your spouse and children live in Italy, expect Italy to look at you as domiciled there.

Registering at the anagrafe creates a presumption

Most Americans on a long-stay visa register their residence with the comune (iscrizione anagrafica). For tax purposes, enrolment in the resident population registry for most of the year creates a presumption that you are resident. Since the 2023 reform this is a rebuttable presumption: you can prove the contrary with evidence. Before, it was effectively absolute.

In practice, the moment you register with the comune for most of a year, Italy will start from the position that you are tax resident. If you register on 15 March, you are enrolled for most of that year, and the presumption applies to that whole year.

Physical presence and remote work

The physical presence test was added partly with remote work in mind. The circular discusses workers who perform their activity remotely from Italy: physical presence for most of the year is added to the traditional criteria. A digital nomad working for US clients from a flat in Bologna for seven months is physically present for most of the year, whatever their employer's location.

What being resident means

The circular restates the principle: under Article 3 of TUIR, Italian residents are taxed on all their income wherever produced, without prejudice to the remedies that resolve double taxation. Non-residents are taxed only on income produced in Italy, under Article 23. For an American resident in Italy this typically means US salary or self-employment income, US investment income and some pension income all enter the Italian return, and double taxation is handled through credits and the US-Italy income tax treaty.

Dual residence and the treaty tie-breaker

You can be resident under Italian law and also treated as a US taxpayer, but the US taxes citizens on citizenship, not residence. The agency's circular explains that conflicts of residence between Italy and another country are resolved by the tie-breaker rules of the relevant double taxation convention. Those rules apply in order:

1. permanent home;
2. centre of vital interests;
3. habitual abode;
4. nationality.

For US citizens this has a limit. The IRS explains on its tax treaty page that, with certain exceptions, treaties do not reduce the US taxes of US citizens. The US-Italy treaty matters most for deciding which country taxes certain income first and for the credits you claim, not for removing your US filing obligation.

How this meets your US return

Being an Italian tax resident does not change your US duties. The IRS states that US citizens and resident aliens living abroad are subject to tax on worldwide income, and the filing rules are generally the same as at home. What changes is how you avoid paying twice:

• Foreign tax credit. You claim credit for income taxes paid to Italy on Form 1116. The IRS notes that if a foreign tax is later redetermined, you generally have to amend your US return.
• Foreign earned income exclusion. On Form 2555 you may exclude foreign earned income up to an annually adjusted limit if you meet the bona fide residence or physical presence test. Which tool works better depends on your income mix.
• Filing date. If you live abroad on the regular due date, the IRS gives an automatic 2-month extension to file, and you can request more time to October 15 with Form 4868.
• FBAR. If the combined value of your foreign accounts, including an Italian bank account, exceeds 10,000 dollars at any time in the year, you file FinCEN Form 114 electronically. It is due April 15, with an automatic extension to October 15.

Keeping track of your days

Since fractions of a day count, keep records from the start:

• boarding passes and passport stamps (and, from October 2025, Entry/Exit System records at Schengen borders);
• your lease and the date of your anagrafe registration;
• where your spouse and children live and go to school;
• club memberships, gym contracts, local commitments that show where your life is centered.

If you split time between Italy and the US, a simple spreadsheet of nights in each country, kept monthly, is far easier than reconstructing a year from card statements.

The first year

Your first year is the one that needs the most care. If you arrive in late summer, you may not hit 183 days and may not be enrolled at the anagrafe for most of the year, so you could be non-resident for that year even though you now live there. If you arrive in January and register quickly, you will very likely be resident for the whole year. The test is applied to the tax period as a whole.

Because the stakes are high on both sides, many Americans in Italy use a commercialista (Italian accountant) together with a US preparer familiar with expat returns. Give both of them the same calendar of your days and the same list of accounts.

Common questions

Is 183 days the only test for Italian tax residency? No. Since 2024 you are resident if, for most of the year, you have your residence, your domicile or your physical presence in Italy. Any one of the three is enough, and enrolment in the comune's registry creates a rebuttable presumption.

Do partial days in Italy count? Yes. The Agenzia delle Entrate circular states that fractions of a day count toward physical presence, and the days do not need to be continuous.

If I am an Italian tax resident, do I still file a US return? Yes. US citizens are taxed on worldwide income wherever they live. You use the foreign tax credit or the foreign earned income exclusion to avoid double tax, and report foreign accounts on the FBAR above the threshold.

Can the US-Italy treaty make me a non-resident of Italy? The treaty's tie-breaker rules resolve dual residence by permanent home, centre of vital interests, habitual abode and nationality. For US citizens, the IRS notes treaties generally do not reduce US tax.