Firm Guides · Deadlines and late-payment regularization (ravvedimento)

Tax deadlines and late-payment regularization (ravvedimento operoso): practical guide

Properly managing tax deadlines means avoiding penalties, interest and disputes, while also planning the liquidity of the business and the professional practice. This guide neatly compiles the calendar of recurring compliance obligations, how advance payments and the final balance of taxes work, the use of the F24 form with offsetting and, above all, the ravvedimento operoso: the tool that allows you to voluntarily regularize omitted or late payments by paying greatly reduced penalties.

Update warning. Penalty percentages and the rules on ravvedimento reflect the reform of the tax penalty system (D.Lgs. 87/2024) in force for violations committed from 1° September 2024. The calendar dates and the statutory interest rate must be checked year by year against the official measures: the 2026 statutory rate is set at 1.60% by the MEF decree of 10 December 2025 (Official Gazette no. 289 of 13 December 2025).

The tax calendar for businesses and professionals

Obligations are grouped into three categories: recurring monthly deadlines (payments via F24 linked to VAT (IVA), withholdings and social security contributions), periodic deadlines (quarterly and advances/balances) and annual tax return filing obligations. When a deadline falls on a Saturday or public holiday, it is postponed to the first subsequent business day.

Monthly deadlines (normally on the 16th)

• Monthly VAT : payment of VAT payable for the previous month by the 16th.
• Withholding taxes : the withholding agent (sostituto d’imposta) pays, by the 16th of the following month, the withholdings on employment income, self-employment income and commissions.
• Employees’ INPS contributions : by the 16th of the following month, in coordination with the UniEmens filing.

Periodic and annual deadlines

• Quarterly VAT (by option) : 16 May, 20 August, 16 November and adjustment for the fourth quarter in the annual return; the 1% surcharge applies to the first three quarters.
• Annual VAT balance : by 16 March, with instalments or deferral to the income tax return deadline applying 0.40% per month.
• INPS contributions for artisans and traders (fixed portion): 16 May, 20 August, 16 November, 16 February; the portion exceeding the minimum threshold follows the income-tax advances and balance.
• Balance and first advance payment of IRPEF/IRES and IRAP: by 30 June, or by 30 July with the 0.40% surcharge.
• Second advance payment: by 30 November.
• IMU: advance payment by 16 June, balance by 16 December.
• Certificazione Unica (Italian annual withholding tax statement): delivery to the recipient by 16 March; filing by 16 March, but by 30 April for certifications covering only income from habitual self-employment and commissions (art. 4, comma 6-quinquies, DPR 322/1998, as amended by D.Lgs. 81/2025).
• Modello 770 (Italian withholding tax return): by 31 October.
• Annual VAT return (Dichiarazione IVA annuale): between 1 February and 30 April.
• Redditi and IRAP returns (Modelli Redditi e IRAP): by 31 October (in 2026 the deadline moves to Monday 2 November, because 31 October falls on a Saturday).

How advance payments and the balance work

Income taxes and IRAP are paid in two stages: the balance for the closed tax year and the advance payments for the current year. The balance covers the difference between tax due and what has already been paid as advance payments; the advance payments anticipate the tax for the current period in two instalments.

Historical method and forecast method

• Historical method: the advance payment is calculated based on the tax due for the previous year. It is the safest because it is based on a certain figure.
• Forecast method: it is calculated based on the tax that is expected to be due for the current year. It is worthwhile if lower income is expected, but if the forecast is too low, penalties and interest apply on the underpayment, which can be remedied through ravvedimento (late payment self-correction).

The F24 form and offsetting

The F24 is the single form used to pay taxes, social security contributions and insurance premiums and to offset debits and credits.

• Vertical offsetting: between debits and credits relating to the same tax.
• Horizontal offsetting: between different taxes. Visto di conformità (certificate of tax compliance) required above 5,000 euros per year; from 1 January 2026 it is barred where debts entrusted to the collection agent, past due and not suspended, exceed 50,000 euros (threshold reduced from 100,000 by L. 199/2025); the bar covers the entire credit and does not apply where an instalment plan is being duly complied with.

If the F24 includes offsetting (compensazioni), it must be filed via the Agenzia delle Entrate’s online channels; an F24 with a zero balance must still be transmitted, and any omission can be remedied through ravvedimento (late voluntary correction).

Ravvedimento operoso (late voluntary correction)

Ravvedimento (art. 13 D.Lgs. 472/1997) allows those who did not pay, or paid late or in an insufficient amount, to voluntarily regularize their position by paying the reduced penalty, in addition to statutory interest and the tax. The reduction is greater the more promptly the regularization is made. For taxes administered by the Italian Revenue Agency it remains available even after findings have been recorded in an official report (processo verbale) and after notification of the draft assessment notice (schema di atto): the bar applies only upon service of liquidation or assessment notices, of the irregularity notices under artt. 36-bis and 36-ter of DPR 600/1973 and 54-bis of DPR 633/1972, and of recovery acts (art. 13, comma 1-ter, D.Lgs. 472/1997).

The reform of penalties from 1° September 2024

For breaches committed from 1° September 2024, the base penalty for failure to pay or late payment has decreased from 30% to 25%. Based on this, two automatic reductions apply:

• Payment within 90 days: penalty reduced by half, therefore to 12.5%.
• Payment within 15 days: the 12.5% is further reduced to 1/15 for each day of delay (about 0.8333% per day).

Attention to the temporal regime. For breaches up to 31 August 2024 the 30% base penalty still applies with the old fractions.

Reductions by time brackets

Statutory interest (interessi legali)

Voluntary disclosure (ravvedimento) also requires the statutory interest (interessi legali), calculated day by day: tax × statutory rate × days / 365. The rate is set each year by an MEF decree; if the delay spans multiple years, the rate in force applies to each period.

Numerical example

VAT liability of 10,000 euro not paid by the 16 March 2026 deadline and regularized on the 10 April 2026, with 25 days late: short-term voluntary disclosure (ravvedimento breve), base penalty halved to 12.5% reduced to 1/10.

• Tax: 10,000.00 euro
• Reduced penalty: 10,000 × 1.25% = 125.00 euro
• Statutory interest (at 1.60%): 10,000 × 1.60% × 25/365 = 10.96 euro
• Total: 10,135.96 euro

The same debt regularized within 5 days would cost about 41.67 euro in penalties: acting promptly is very worthwhile. Tax, penalty and interest are paid with the same F24 form, each with its own tax code.

Mistakes to avoid

• Paying the tax and forgetting the penalty and interest: voluntary disclosure (ravvedimento) is completed only with all three components.
• Incorrect tax (tributo) codes or incorrect reference year in the F24.
• Getting the date of the infringement wrong and therefore the applicable regime (25% from 1 September 2024, 30% before).
• Confusing the recording of findings with service of a notice: after an official report (processo verbale) voluntary disclosure is still possible (at 1/5), whereas after service of a tax assessment notice, an automated-control notice (avviso bonario) or a recovery act it is no longer allowed for that infringement.
• Applying the wrong statutory interest rate when the delay spans a change of year.

Checks for 2026

Before payments and voluntary disclosures (ravvedimenti) in 2026, it is advisable to confirm: the statutory interest rate set by the MEF decree; the filing deadline for the Redditi and IRAP returns; any extensions for ISA taxpayers; postponements of deadlines that fall on Saturdays or public holidays. Studio Ponchio is available for the precise calculation of penalties and interest and for the correct completion of the F24.

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