Argentina’s Top Court Curbs Provinces’ Discriminatory Gross-Receipts Tax

Argentina · Economy

Key Facts

• RulingsArgentina’s Supreme Court in 2026 struck down differential gross-receipts tax rates in Santa Fe and Entre Ríos.
• CasesDeloitte & Co. S.A. c/ Santa Fe and INC S.A. c/ Entre Ríos were decided together, with a consolidated decision reported on July 1, 2026.
• RatesSanta Fe charged 4.5% and Entre Ríos 5% on companies domiciled outside the province, versus lower rates for local firms.
• GroundsThe Court cited Articles 9–12 of the Constitution (prohibiting internal customs) and Article 16 (equality before the law).
• CharacterisationThe differential levies were deemed “aduanas interiores” (internal customs houses) that obstructed interjurisdictional commerce.
• ScopeThe precedent affects other provinces with similar schemes; companies may seek refunds, and provincial revenue codes face pressure to change.

Argentina’s highest court has declared that provinces cannot tax out-of-state firms at higher gross-receipts rates, striking down protectionist levies as unconstitutional internal customs.

For anyone tracking Latin America’s largest economy, a quiet but significant shift in Argentina’s fiscal federalism took place in 2026: the Supreme Court ruled that two provinces violated the national Constitution by charging higher provincial gross-receipts tax rates to companies domiciled elsewhere. The decision, which affects Santa Fe and Entre Ríos directly, curbs provincial tax autonomy and sends a warning to other jurisdictions that have used similar schemes to favour locally headquartered businesses.

What the Court Decided

The lead cases were Deloitte & Co. S.A. c/ Santa Fe, involving accounting and audit services, and INC S.A. c/ Entre Ríos, where INC is the local operator of the Carrefour retail chain. Both provinces had set higher Ingresos Brutos rates—4.5% in Santa Fe and 5% in Entre Ríos—specifically for companies with legal domicile outside the province, while local firms paid lower rates on the same activities.

A majority of the Court, comprising justices Rosatti, Rosenkrantz and Lorenzetti, found that these differential rates breached Articles 9–12 of the Constitution, which prohibit internal tariffs and customs between provinces. The justices also invoked Article 16, which guarantees equality before the law, arguing that discriminating by corporate domicile distorted competition and obstructed interjurisdictional commerce. The ruling was reported as a consolidated decision on July 1, 2026, following procedural steps from April to June of that year.

Constitutional Grounds and ‘Internal Customs’

The Court’s characterisation of the rates as “aduanas interiores” is central to the ruling. The Constitution’s framers sought to create a single internal market, and Articles 9–12 were designed to prevent provinces from erecting barriers to the free movement of goods and services. By taxing out-of-province companies more heavily, Santa Fe and Entre Ríos were effectively imposing a tariff on foreign businesses—a practice the Court deemed incompatible with the federal compact.

The equality argument under Article 16 adds a second layer. The Court reasoned that a company’s place of incorporation is not a legitimate basis for different tax treatment when the economic activity is identical. This is not merely a technical point: it means that provinces cannot use their tax codes as industrial policy tools to protect local incumbents from outside competition. The ruling explicitly rejects the notion that provincial autonomy extends to discriminatory taxation.

Impact on Companies and Provincial Revenue

For companies operating across provincial lines, the decision is a clear win. Out-of-province firms that paid the higher rates may now seek refunds for past periods, although the practical mechanics of such claims will depend on each province’s procedural rules. The precedent also puts pressure on other provinces—several of which apply similar differential schemes—to rewrite their gross-receipts codes to avoid a wave of litigation.

For provincial treasuries, the ruling is a blow to a key own-source revenue stream. Ingresos Brutos is a cumulative turnover tax and one of the provinces’ main fiscal tools. The Convenio Multilateral already allocates the tax base among provinces for multi-jurisdictional taxpayers, but the differential rates were a way to extract more from outside firms. With that option removed, Santa Fe and Entre Ríos will need to either raise uniform rates, broaden the base, or accept lower collections. The decision does not eliminate the tax itself—it only forbids discrimination by domicile.

Provincial Tax Autonomy and the Road Ahead

The ruling does not strike down provincial gross-receipts tax as a whole, nor does it question the provinces’ right to levy turnover taxes. What it does is draw a firm line: rates must be uniform for all taxpayers engaged in the same activity, regardless of where they are headquartered. This is a significant constraint on provincial fiscal discretion, but it is consistent with the constitutional design of a common market.

Observers should note that the cases concern Santa Fe and Entre Ríos specifically—not Buenos Aires Province, which has its own separate tax regime. Still, the legal reasoning is broad enough to apply to any jurisdiction with similar differential rates. The immediate effect will be a flurry of administrative adjustments in provincial revenue codes, and likely more litigation as companies test the boundaries of the precedent. For now, the Court has sent a clear signal: in Argentina, the internal market takes precedence over provincial protectionism.

Frequently Asked Questions

Does this ruling eliminate the Ingresos Brutos tax?

No. The Court only declared differential rates unconstitutional. Provinces may continue to levy the provincial gross-receipts tax, but rates must be the same for local and out-of-province companies engaged in similar activities.

Can companies that paid higher rates claim refunds?

Potentially, yes. Firms that paid the discriminatory rates in Santa Fe and Entre Ríos may seek reimbursement, though the process will depend on provincial tax procedures and applicable statutes of limitation. The ruling does not automatically create a refund mechanism; taxpayers must file claims.

Which provinces are affected by this precedent?

The rulings directly concern Santa Fe and Entre Ríos. However, several other provinces have similar differential schemes, and the constitutional reasoning could be applied to them if challenged. The decision does not specifically address Buenos Aires Province.

Connected Coverage

Sources: El Cronista; Ámbito; La Nación; El Litoral; Análisis Digital; Rosario3.

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