Your U.S.–Italy Dual Tax Filing Calendar: What to Expect Each Year

This article walks through the year as we run it on behalf of clients. The dates that anchor the calendar are April 15 for the U.S. estimated tax payment, June 30 for the Italian prior-year balance and the first installment of the next year’s estimate, and October 30 for the Italian return itself plus the second installment. The full IRS quarterly schedule, the automatic two-month expat extension to June 15, the FBAR deadline running on its own track, and the final October 15 U.S. filing window all sit alongside those anchor dates and have to be tracked together.

For the underlying mechanics of why both countries tax you in the first place, the canonical JSBC piece is The Glide Slope: How to Move to Italy Without Crashing Your Retirement. This article assumes the dual-filer position is settled and asks: what does the year actually look like in practice?

January and February: Documents Arrive

The year opens with the documents that drive both returns. U.S. payors are required to issue Form W-2 (employee wages) and Form 1099 (independent contractor income, dividends, interest, brokerage activity, pension distributions, Social Security via Form SSA-1099) by January 31. Brokerage 1099 composites typically arrive between mid-February and mid-March, with corrected versions sometimes following into April. We collect everything at this stage, including the Italian-side prior-year data we will need to project the current year’s foreign tax credit position.

Italian-side documents follow a different rhythm. The Certificazione Unica from any Italian employer or pension payor arrives by mid-March. Italian bank statements and Stato Patrimoniale data for IVAFE and IVIE computation are pulled directly from the institutions, generally available throughout the spring.

Early in the Year: Automatic U.S. Extension Filed

As soon as the new filing year begins, we file an automatic extension on the U.S. side for every client. Form 4868 pushes the federal filing deadline from April 15 to October 15. Americans living abroad already qualify for an automatic two-month extension to June 15 by virtue of being out of the country, with a further extension through October 15 available on request, but we file the formal extension proactively regardless of how soon we expect to have the return ready. The extension is a no-cost insurance policy against the late-filing penalty (5% per month, capped at 25%) if anything unexpected delays the work later in the cycle.

The extension protects the time to file. It does not extend the time to pay, which is why the April 15 estimated payment described below still matters even when the formal return is filed months later.

April 15: U.S. Q1 Estimated Tax Payment and FBAR Original Due Date

April 15 is the busiest U.S.-side date of the year. Three things land at once.

The first is the Q1 estimated tax payment for the current year. Under IRC Section 6654, individuals are required to pay estimated tax in four quarterly installments (April 15, June 15, September 15, and January 15 of the following year) where their withholding will not cover the year’s liability. For dual filers without U.S. wage withholding, the entire current-year tax is paid through these four installments. We calculate the projected liability and pay the Q1 portion on April 15.

Where the projection is incomplete, which is the common case because Italy has not yet finalized its forms or its tax data for the year, we default to the IRS safe harbor. The safe harbor protects against the underpayment penalty if the taxpayer has paid in either 100% of the prior year’s tax liability (110% if AGI exceeded $150,000) or 90% of the current year’s actual liability, whichever applies.

The second is any balance due on the prior-year return. Even though Form 4868 extends the filing deadline to October 15, the balance due is technically owed on April 15. Where the prior-year position cannot be finalized in time, we pay the projected balance with the extension and reconcile when the return is filed.

The third is the FBAR original due date. FinCEN Form 114 (Report of Foreign Bank and Financial Accounts) is technically due on April 15 each year, but FinCEN grants an automatic extension to October 15 for all filers, no application required. The October 15 FBAR deadline aligns with the extended Form 1040 deadline, which is the date we work toward.

June 15: U.S. Q2 Estimated Payment and Expat Filing Deadline

June 15 carries two U.S.-side obligations.

The Q2 estimated tax payment is due. The four installments do not have to be equal where income is uneven across the year, and we adjust each installment as new information arrives, but the cumulative paid-in figure must meet the safe harbor at each milestone.

June 15 is also the automatic expat filing deadline. Americans whose tax home and abode are outside the United States on April 15 receive an automatic two-month extension to file the 1040 (no form required, but the return must include a statement explaining the extension). Because we file Form 4868 in April, we are already extended to October 15, so this date passes without action for our clients. Filers who never extended formally and rely only on the automatic expat rule must either file by June 15 or submit Form 4868 on that date.

June 30: Italian Prior-Year Balance and First Installment

June 30 is the heaviest day in the Italian tax calendar. Two payments are due on the same date, both transmitted through Form F24, the unified Italian payment form used for income tax, regional surcharges, IVAFE, IVIE, INPS, and most other federal-level taxes.

The first payment is the saldo, the full balance due for the prior tax year. For a client who recently moved to Italy and is filing their first Italian return, this is the single payment that covers the entire prior year’s IRPEF, IVAFE on foreign financial assets at 0.2%, IVIE on foreign real estate at 1.06%, and the regional and municipal addizionali surcharges.

The second payment is the primo acconto, 40% of the estimated tax for the current year. The estimate is computed under the historical method, taking the prior year’s Italian tax as the baseline, with adjustments for what was already reported on the U.S. return and for items that will not recur. Italy permits a previsionale method (estimating from current-year facts where the taxpayer expects a materially lower liability) but most filers use the historical method to avoid the underpayment risk that comes with under-projecting.

June 30 is also when the Agenzia delle Entrate finalizes the official Modello Redditi PF forms for the year. From this point forward we begin preparing the Italian return in earnest.

June 30 to October 30: Italian Return Preparation and Review

This window is when the Italian filing comes together.

The income items that flow from the U.S. return into the Italian base are walked through category by category. W-2 wages, 1099 self-employment income, dividends, interest, capital gains, and pension and Social Security distributions each have a treaty distributive article that determines which side has the primary taxing right and which side claims the credit. The Italian return picks up the residence-country share of each category and reconciles against the U.S. return that was prepared earlier in the year.

The IVAFE computation is run on every foreign financial asset held during the year, which for most clients means Schwab, Fidelity, or Vanguard brokerage accounts, U.S. retirement accounts, and any other reportable holdings. IVIE is computed on foreign real estate and reduced by the foreign property tax actually paid (U.S. state and local property tax counts here).

The credito d’imposta for U.S. tax paid on doubly-taxed income is calculated under Article 165 of TUIR. The Italian credit is limited to the Italian tax on the same income and runs through a per-country, per-category mechanism that does not always close the gap fully, particularly where the U.S. and Italian rates diverge or where Italian flat-rate taxes are involved.

Drafts go to the client for review and approval as each section is ready. We aim to have the full return finalized and submitted well before the October 30 deadline.

September 15: U.S. Q3 Estimated Payment

The Q3 estimated tax payment for the current year is due. By this point we usually have a clearer picture of the year’s actual income and can refine the cumulative paid-in position, particularly for clients with variable self-employment income, capital gains, or year-end equity compensation events.

October 15: Final U.S. Filing Deadline and FBAR Deadline

October 15 is the final U.S. filing deadline for individuals who filed Form 4868 in April. Three items land together.

The Form 1040 is transmitted with all attached schedules and informational forms: Form 1116 for foreign tax credits, Form 2555 for the Foreign Earned Income Exclusion where it produces a better result than the credit, Form 8938 for specified foreign financial assets above the thresholds, Form 8621 for any PFIC holdings, Form 8858 for foreign disregarded entities, and Form 5471 for any SRL ownership above the reporting threshold.

FinCEN Form 114 (FBAR) is filed by the same date through the BSA E-Filing System. The FBAR runs on its own track, separate from the 1040, but the deadline aligns. For dual filers in Italy this typically covers Italian bank accounts, fondo pensione balances, polizza vita cash values, and any other foreign financial accounts whose aggregate value exceeded $10,000 at any point during the year.

Any final balance due on the 1040 is paid through EFTPS, IRS Direct Pay, or by check on the same date.

October 30: Italian Return Filed and Second Installment Due

By October 30 we aim to have the Italian return fully filed.

The Modello Redditi PF is transmitted electronically through the Agenzia delle Entrate’s Fisconline or Entratel portal. The same F24 used for the June payments is used again for any final balance and for the secondo acconto.

October 30 also triggers the secondo acconto, the remaining 60% of the estimated tax for the following year. Together with the June 40% installment, this completes the full estimated payment for the upcoming Italian tax year.

January 15: U.S. Q4 Estimated Payment

January 15 of the following year is the Q4 estimated tax payment for the year just ended. This is the final installment in the four-quarter cycle and the last opportunity to true up the cumulative paid-in figure before the next April 15 reconciliation.

For clients who had an unexpected late-year income event (a year-end bonus, a fund distribution, a capital gain on a December sale, equity compensation that vested in Q4) this is the date to top up the safe harbor before the underpayment-penalty clock starts running.

When Filings Run Past the Deadlines

For clients with more complex situations (foreign trusts, significant foreign assets, returns that require the full October 15 extension cycle to close out, or Italian-side issues that require additional documentation from third parties) filing occasionally runs past one of the deadlines.

The Italian late-filing penalty for a return filed within 90 days of the deadline is small, typically under €100 once ravvedimento operoso reductions are applied, and is not the primary concern. What matters far more is that all tax payments have been made on time and in the correct amounts. Unpaid balances on the Italian side accrue legal interest plus a percentage surcharge for each month past due, and the Agenzia delle Entrate’s enforcement attention is concentrated on missed payments rather than on slightly delayed forms. We sequence the work so the payments land on time even in the rare cases where the form filing itself slips.

On the U.S. side, the late-filing penalty (5% per month) and the late-payment penalty (0.5% per month) are both calculated on the unpaid balance. Because we file Form 4868 in April and pay the safe harbor estimate at the same time, the late-payment penalty is the only meaningful exposure for our clients, and the safe harbor reduces it to zero in most cases.

Why the Coordination Matters

The reason the calendar matters, rather than just being a list of deadlines, is that the two systems do not align on their own.

The U.S. return is filed before the Italian return computes the Italian tax that should be credited on the U.S. side. Done correctly, this is handled by reading prior-year Italian numbers forward, claiming the credit on the right basket of the U.S. Form 1116, and reconciling adjustments on the next cycle. Done incorrectly, the foreign tax credit position is wrong on every U.S. return for years.

The Italian return is filed after the U.S. return is complete, using the U.S. numbers as inputs for the credito d’imposta. Errors in the U.S. return propagate forward into the Italian return.

We require both returns to be coordinated in the same engagement for exactly this reason. Preparers who only see one side cannot reconcile the credit positions cleanly, and clients who use a U.S. accountant for the 1040 and a separate Italian commercialista for the Modello Redditi PF often end up paying more total tax than they should, because the credit position never aligns across the two filings.

The Bottom Line

The year has more dates than most clients realize, but the structure is predictable. April 15 carries the Q1 estimated payment, the Form 4868 extension, and the technical FBAR original due date. June 15 carries the Q2 estimated payment and the automatic expat filing deadline. June 30 is the Italian saldo for the prior year plus the primo acconto. September 15 carries the Q3 estimated payment. October 15 is the final U.S. filing deadline, the FBAR deadline, and the Form 1040 transmission. October 30 is the Italian return filing target and the secondo acconto. January 15 of the following year closes the cycle with the Q4 estimated payment.

In between, we file the U.S. extension early, prepare the U.S. return through the spring, draft the Italian return through the summer, finalize both for client review through the fall, and reconcile credit positions across the two sides at every stage. Every Italian payment runs through F24. Every U.S. payment runs through EFTPS or direct debit. Every credit position is reconciled across the two returns rather than computed in isolation.

Our job is to keep you compliant on both sides of the Atlantic without surprises. The calendar is predictable. The work is substantial but ordered. We will guide you through each date as it comes.

This article is for informational purposes only and does not constitute tax or legal advice. Filing dates, safe-harbor thresholds, and Italian acconto percentages are accurate as of the date of publication but are subject to change. Consult a qualified cross-border tax professional before relying on the calendar described here.

Sources: IRS Publication 17 and Form 1040 Instructions; IRC Section 6654 (Estimated Tax); IRS Form 4868 Instructions; FinCEN BSA E-Filing System (FBAR); Agenzia delle Entrate Modello Redditi PF Istruzioni; TUIR Article 165 (foreign tax credit); D.L. 78/2009 Article 19 (IVAFE); D.L. 201/2011 Article 19 (IVIE).