The consequences of IOF (taxation over financial operations) increase and the possibility of 50% surcharge on products imported from the United States to Brazil on contractual and commercial relations

Good faith principles and commercial impracticability doctrine clearly support contract renegotiation or termination under these circumstances.

The consequences of IOF (taxation over financial operations) increase and the possibility of 50% surcharge on products imported from the United States to Brazil on contractual and commercial relations

Brazil's current tax and political climate has created significant uncertainty for businesses. Exporters are concerned about their U.S. market access following potential 50% surcharges, while importers face an immediate reality: IOF costs have skyrocketed over 800% (from 0.38% to 3.50%), and there is a the possibility of reciprocal 50% surcharges on U.S. imports looming.

Rather than debating the constitutionality of using a regulatory tax like IOF for revenue purposes—an issue the Federal Supreme Court has already decided by upholding the increase—this analysis focuses on the practical impact on existing contracts. Specifically, we are examining contracts signed prior to these increases that will face higher costs when goods arrive in Brazil or when foreign exchange transactions close after the tax hikes take effect.

The Business Challenge

The impact spans multiple industries. IT companies reselling or deploying imported hardware, automotive manufacturers importing vehicles and parts, pharmaceutical companies relying on imported ingredients, capital goods distributors, fertilizer suppliers, chemical manufacturers, and electronics companies all face dual exposure: IOF increases regardless of origin country, plus potential 50% surcharges on U.S. imports.

Companies must navigate everything from cost pass-through pricing on products made with imported inputs to contractual disputes over price adjustments when existing agreements contain "all taxes included" clauses but lack specific provisions for tax changes.

This analysis addresses operations with signed contracts that don't include tax adjustment clauses.

Contract Law Framework

In the absence of explicit contractual provisions for price renegotiation, we must rely on established contract law principles and civil (not consumer) law frameworks.

The foundation remains pacta sunt servanda—contracts must be honoured. This principle ensures legal certainty by requiring parties to fulfil their obligations once they've expressed their intent, providing security and predictability in commercial relationships.

However, this principle works alongside good faith requirements and the social function of contracts. Social function prevents unfair contract exploitation, oppression, or unjust enrichment, ensuring equitable outcomes. Good faith demands loyalty, honesty, and transparency throughout the entire contractual relationship, from negotiation through termination and any post-contract obligations.

In some cases, courts may interpret contract terms differently than written when there is consistent behaviour by the parties that goes against the written terms, and no objections are raised during the course of performance.

The key legal doctrines for these situations are frustration of purpose and commercial impracticability (similar to Brazil's theories of unforeseeability and excessive burden). These doctrines permit the modification or termination of contracts in cases where extraordinary, unforeseeable events result in excessive hardship for one party while providing the other with disproportionate advantages.

Both doctrines require that the triggering events be truly extraordinary and unforeseeable.

Courts will ultimately determine whether these tax increases constitute unforeseeable and extraordinary events, given their abrupt implementation and staggering magnitude:

a) IOF increased over 800% (from 0.38% to 3.5%)

b) For import duties, using combustion engines (NCM 8408.20.10) currently taxed at 18%: adding 50% creates a 68% total rate—a 277% increase

c) Technology equipment faces even worse impacts: proximity activation cards and tags (NCM 85235210) would jump from 18% to 68%—a 529% increase

While courts tend to be hesitant to use tax increases as a basis for contract revision, the current levels are of significant concern. When considered in conjunction with their political origins and the practical impossibility of fulfilling contracts requiring U.S. imports, which could result in at least 50% cost increases, these circumstances are without precedent.

Such dramatic increases weren't (and couldn't reasonably be) anticipated during contract negotiations and pricing. Companies unable to pass these tax costs on to buyers will face substantial losses or operational impossibility, especially since few operations maintain contribution margins exceeding 30%, with many limited to 5%, 10%, or 15%.

Contractual Provisions

Given political instability and upcoming tax reform, contracts must explicitly address price adjustments for tax changes, allowing cost pass-through when tax burdens shift (increases are more likely than decreases).

While some lawyers argue that Article 478 already covers this, this approach has limitations. Firstly, it primarily offers contract termination rather than modification, which parties often do not want. Secondly, judicial relief only applies from the lawsuit filing date, requiring court action with delayed effectiveness.

When feasible, contracts should detail the tax components in pricing, though this may expose cost structures. This level of transparency proves valuable during renegotiations.

The common "all taxes included" clause actually supports the burdened party's position. Since taxes were included at signing, tax increases logically require price adjustments to maintain the "all taxes included" principle.

Recommended Actions

For contracts or proposals under negotiation that have not had the formalization of signature or acceptance, it is important to adjust the content, indicating the possibility of value revision in case of tax burden change.

For contracts signed on previous dates, the most effective approach is to initiate an open and transparent dialogue with the counterpart, demonstrating the impossibility of maintaining the relationship without due adjustment.

While this may strain relationships between sales and purchasing teams, it is vital that these conversations take place in order to prepare for the imminent tariff changes.

JUDICIALIZATION OF THE ISSUE

When negotiation fails, litigation becomes necessary, though it presents significant risks for both parties.

Suppliers seeking judicial price adjustments face several challenges:

a) Courts traditionally resist tax-based contract revisions, even with these extreme increases. Success depends on judicial recognition that unforeseeability doctrine applies.

b) Article 478 remedies focus on contract termination rather than modification. Following the statute literally, the best outcome might be ending the contractual relationship—potentially as harmful as absorbing the tax increases.

Litigation risks leaving everyone worse off: buyers facing supply disruptions, suppliers losing contractual relationships.

Even in court, settlement often provides the best resolution.

Clear Risk Allocation is Essential

The only sound conclusion is that contracts must include clear clauses allocating risks and costs from sudden tax environment changes. This applies both to current U.S.-Brazil political tensions and upcoming tax reform impacts.

Legal departments should immediately review standard contract templates, especially client agreements, to add or strengthen tax adjustment and renegotiation clauses for unforeseeable circumstances.

When clients impose their standard templates, legal teams must prioritize adding or improving economic balance clauses to preserve renegotiation rights, even if they require case-by-case negotiation.