Land in Italy after 2 July and €20,000 of work costs €3,048 more

A professional who lands in Italy on 3 July 2026 and starts invoicing that autumn is a non-resident in Italian tax law for the whole of 2026, including the months spent working in Milan. The regime forfetario is shut to non-residents, so €20,000 of Italian invoices billed between landing and 31 December carries €3,828.04 of income tax instead of the €780.00 the flat tax would have charged — €3,048.04 more on the same work.53

Land a day earlier and none of it applies. Someone who arrives on 2 July is resident for 2026 and can bill on the flat tax from the first invoice. The line between the two dates is not the move, the visa or the registration at the town hall. It is a day count.

A tax year, not an arrival date

Italy decides residence for a whole tax period at a time. Article 2, comma 2 of the TUIR, as rewritten with effect from 2024, treats a person as resident when per la maggior parte del periodo d’imposta, considerando anche le frazioni di giorno — for the greater part of the tax period, counting parts of days — they have their residence, their domicile or their physical presence in Italy.1 There is no split year, and no version of the test that runs from the day of arrival.

2026 has 365 days, so the greater part of it is 183. Counting from 2 July to 31 December inclusive gives exactly 183; from 3 July, 182. That single day decides the year. The same qualifier governs all three routes to residence and the presumption that attaches to being on the town hall’s register, so none of them is available on a shorter count than the calendar allows.

Being a non-resident does not put the income out of Italy’s reach. Article 23, comma 1, lettera d) sources redditi di lavoro autonomo to the place the activity is carried on, not the place the client sits, so work done from an Italian desk for a client in Berlin or Boston is Italian income and is declared in Italy.2

What the arrival year costs

A non-resident’s Italian tax is computed under article 24, and two of its provisions do most of the damage. Comma 2 allows only five of the deductions in article 10 — lettere a), g), h), i) and l). Compulsory pension and welfare contributions are lettera e), which is not among them, so a non-resident pays tax on income they have already handed to a social security institution.34 Comma 3 keeps the article 13 detrazione and removes the family ones outright.

On the other side, the flat tax charges a rate on a presumed share of turnover rather than on income: comma 64 sets the base at receipts times the coefficient for the activity, 78% for professional services, and comma 65 sets the rate at 5% for the tax year the activity began in and the four after it.67 On €20,000 of invoices that is €15,600.00 of income and €780.00 of tax, or 3.9% of what was billed. Ordinary taxation as a non-resident charges 23% on the whole €20,000 and gives back a detrazione of €771.96, leaving €3,828.04 — 19.14%.89

The detrazione here is the schedule in article 13, comma 5 rather than the straight-line approximation the calculators on this site use, which runs €110.01 higher at this income and would have made the gap look smaller than it is.

Against the standard 15% rate, which is what a founder who has run something in the previous three years would be paying, the same arrival year costs €1,488.04.

The exception that does not reach

Comma 57, lettera b) does not shut every non-resident out. It carves out those resident in an EU or EEA state that exchanges tax information and who produce in Italy redditi che costituiscono almeno il 75 per cento del reddito complessivamente prodotto — income amounting to at least 75% of everything they earned that year.5

The trouble is what the test is measured over. It compares a whole year of Italian income with a whole year of income from everywhere, and the months before the move are in the denominator. Someone who earned at a steady rate at home until they left and at a steady rate in Italy afterwards clears 75% only if the Italian rate is a multiple of the old one, and the multiple is fixed by the calendar: three times over on 3 July, six times on 1 September, nearly nine on 1 October, thirty-two on 1 December.

Run the same test across every day of the year and it closes on itself. At an even earning rate the latest arrival that still produces 75% of the year’s income in Italy is 2 April, at 75.07%, and every date that clears the test is a date on which the person is resident for the year anyway and needs no carve-out. The exception is available, in practice, to people who do not need it.

When the arrival year costs nothing

A short year is not automatically an expensive one. The article 13 detrazione is €1,265.00 up to €5,500 of income, which is exactly 23% of €5,500, so a non-resident billing €5,000 in Italy owes no income tax at all — while the flat tax would have taken €195.00 from them.9 The two lines cross at €6,453.21 of billing against the 5% rate, and at €9,877.27 against the standard 15%. Below those points the exclusion costs nothing, and it is a busy autumn rather than a late arrival that makes it expensive.

If the clients are Italian

Everything above assumes the invoices go to clients outside Italy, so no Italian withholding agent is involved and the tax is settled on a return. Where the payer is an Italian business, the second comma of article 25 of D.P.R. 600/1973 has it withhold una ritenuta a titolo d’imposta nella misura del 30 per cento on compensi paid to a non-resident — a final 30%, not a payment on account, with no detrazione behind it and no return in which to recover any of it. It does not apply to work performed abroad, or to payments made to an Italian permanent establishment.10 On the same €20,000 that is €6,000.

The discounted year that goes with it

The 5% rate is granted for the tax year the activity began in and the four after it, so it is anchored to the start of the business and not to the day the regime starts applying.7 An activity begun in 2026 and taxed ordinarily for 2026 therefore enters the flat tax in 2027 with four discounted years left rather than five. What one of those years is worth was measured in the piece on opening dates: €2,883.27 for a professional billing €50,000 a year.

What this does not settle

The comparison is Italian income tax on an identical invoice book, and three things sit outside it. Contributions are the first: what a person owes INPS turns on where they are insured, and none of the documents here decides that. Their absence flatters the smaller number twice over, because the flat-rate base is taken net of contributions actually paid and a non-resident cannot deduct them at all. The regional and municipal surcharges are the second, and they run the same way — the substitute tax replaces them and ordinary taxation does not.

Real costs are the third. Ordinary taxation allows them against the income and the flat rate never does, so a business with heavy costs recovers part of the gap; the point at which that happens is the subject of a separate piece. And a treaty between Italy and the country someone came from can stop the same income being taxed twice, which is a different question from whether an Italian regime is open: nothing in a treaty admits a taxpayer to a national scheme whose conditions they do not meet.

Residence itself is a question of fact, and the day count is only its shortest form. A person with a home and a family in Italy from January is resident from January whatever the stamps in their passport say, and registering with a comune in September does not make anyone resident for a year that is already more than half spent.