Argentina’s tax authority has decoupled the deadline for filing annual income tax returns from the date the tax must be paid, a move that reshapes the compliance calendar for millions of individuals. The revenue agency ARCA, through a resolution published on 21 July, pushed the presentation of the 2025 fiscal year sworn declaration for personal income tax (Ganancias) to 27 August 2026, while leaving the payment deadline unchanged at 27 July. The same resolution left the wealth tax (Bienes Personales) calendar untouched, with both filing and payment due on 27 July, and postponed the first advance payment for the 2026 income tax period to mid-September, staggered by tax ID number.

The measure effectively requires taxpayers to settle their liability before formally determining it, a sequence that tax practitioners in Buenos Aires describe as technically inverted. Sebastián Domínguez, a tax adviser frequently cited in the local press, noted that the tax is calculated through the sworn declaration itself, so demanding payment ahead of that formal step forces taxpayers to estimate the amount due. The government’s priority, analysts in the capital suggest, is to protect fiscal accounts: income tax is shared with provinces, and any delay in collection would ripple through subnational budgets at a time when the federal administration is trying to contain a deficit widened by mid-year bonus payments.

Other jurisdictions are navigating their own inflexion points in the tax calendar. In Italy, 20 July marked the deadline for self-employed workers and businesses subject to synthetic reliability indices (ISA) to pay the balance of 2025 income taxes and the first advance for 2026 without surcharge; those missing it can still pay by 20 August with a 0.80% increase. In Brazil, the Federal District began collecting the final instalment of the 2026 vehicle property tax (IPVA) this week, with due dates running from 20 to 24 July according to licence plate digits. Colombia, meanwhile, is preparing for the personal income tax filing season that opens on 12 August, with the tax authority DIAN already cross-referencing third-party data on more than 6.5 million filers.

The Argentine extension is also designed to give Congress time to debate a proposed “Fiscal Innocence Law” that would allow taxpayers to regularise undeclared dollar holdings without triggering asset-trajectory audits, provided the corresponding tax is paid. Separately, ARCA published updated monotributo brackets, with a 16.8% inflation adjustment taking effect on 1 August, and opened the mid-year re-categorisation window until 5 August. The next milestone to watch is whether lawmakers advance the amnesty bill before the new 27 August filing deadline, a decision that will determine how many Argentines opt into the simplified regime. The immediate test, however, is the 27 July payment date, which will reveal how many taxpayers are able to meet a liability they have not yet formally computed.