ARCA tax calendar 2026 and Argentina's national holidays with business days, from your AI assistant

What you can ask

• What ARCA due dates do I have in September 2026 as a monotributista with a CUIT ending in 3?
• When is VAT due this month for a responsable inscripto with a CUIT ending in 8?
• When is form F.931 for payroll contributions due for an employer with a CUIT ending in 0?
• What are Argentina's national holidays in 2026?
• Are there any holidays in Argentina in September 2026?
• How many business days does October 2026 have in Argentina?
• Does the November 20 holiday get moved this year?
• When is the next long weekend in Argentina?

Which due dates the calendar covers

The calendar covers four profiles and the national obligations of each one:

• Monotributista: the monthly fee payment, which combines the integrated tax and the social security contributions.
• Autónomo (self-employed): the monthly pension contribution and the advance payments for income tax and personal assets tax.
• Responsable inscripto (VAT-registered): the monthly VAT return (through IVA Simple, mandatory for everyone since the November 2025 period) and the advance payments for income tax and personal assets tax.
• Employer: form F.931 for payroll contributions.

Each date is adjusted by the last digit of the CUIT, which determines the exact day within the due date week. It covers the national obligations administered by ARCA; provincial taxes, such as ingresos brutos (gross receipts tax), and municipal fees are not in this calendar.

National holidays and business days

You can ask for the holidays of a full year or of a single month, and the assistant returns them with their type: fixed (observed on the day they fall), movable (may be moved to a Monday, following the rule in the national holidays law) and bridge holidays (the non-working days the government sets each year). For movable holidays it serves the date on which they are actually observed, not the nominal one, which is what you need for counting deadlines.

With that it calculates the month's business days, discounting weekends and holidays. It is the count you need for an administrative deadline, for projecting billing in a short month, or for knowing how many school or work days a period has. Coverage starts in 2021 and includes next year as soon as its decree is published.

How to ask so the answer is useful

For due dates, give the assistant the two things it needs: your profile (monotributista, autónomo, responsable inscripto or employer) and the last digit of your CUIT. If you leave them out, it will ask. You can combine both tools in a single query: "does this month's monotributo due date fall on a holiday?". When a due date falls on a non-business day, the answer tells you the next business day it moves to. And if you manage several clients, ask for the full month by profile and build the schedule in one pass.

Tools that answer it

You ask in plain language and your assistant picks the tool. The names are listed so you can recognize them in the answer:

Sources and update frequency

• ARCA: due dates: official due date calendar by tax and CUIT ending digit.
• Argentina Datos: fixed, movable and bridge national holidays, since 2021.

Due dates follow the calendar ARCA publishes and are calculated for your profile and CUIT ending digit. Holidays cover 2021 through next year and are updated when each year's decree is published.