PRONAMPE Inverted: When Brazil's Emergency Credit Program Becomes a Compound-Interest Trap on SELIC

Brazil's National Program to Support Micro and Small Businesses (PRONAMPE), created by Law 13,999/2020 amid the public-health emergency, had a clear goal: offer working capital at controlled interest rates to companies that would otherwise struggle to access credit on sustainable terms. The law itself expressly bars charging fees or additional charges beyond the program's own parameters (art. 3, §2).

In two cases I recently reviewed — PRONAMPE working-capital operations contracted with different institutions, one with a hybrid rate (fixed component + SELIC), involving amounts around R$141,000 and R$150,000 — I found a pattern I call "PRONAMPE inverted": the very instrument created to lower the cost of emergency credit, in practice, produced compound capitalization on a floating index (SELIC) that substantially inflated the outstanding balance before the first installment was even due.

The mechanism: long grace period + daily compound capitalization

Both cases share a common structural element: a relatively long grace period (215 days in one case; 11 months in the other) during which no installment is paid, but interest — calculated on a hybrid rate combining a fixed component with the prevailing SELIC — keeps accruing, on a compound basis, day after day.

This is different from a simple payment "pause," which is how the market usually markets this type of grace period to clients ("financial breathing room for the first months"). In practice, each day of grace in which the balance isn't paid turns into capital on which the next day charges interest — and so on, in a compound-interest regime that Brazilian Supreme Court Precedent (Súmula) 121, in force since 1963, expressly bars even when "agreed" contractually. In one of the cases analyzed, this dynamic inflated the balance substantially before even the first installment — growth that does not stem from the company's use of the credit, but purely from the calculation mechanics applied during a period when it wasn't actually enjoying any relief.

The "seesaw effect": Price table over a floating index

A second recurring technical element in these cases is what I call the "seesaw effect": applying the Price amortization table — a fixed-installment system originally designed for stable, pre-fixed interest rates — to a rate that is, in practice, floating and tied to SELIC. When the index moves upward between contracting and each installment's due date, the Price system does not absorb that variation well: the result is principal amortization inconsistent with what a constant-amortization (SAC) system would produce, generating additional distortions in the projected outstanding balance.

One-click contracting and lost informational friction

An aggravating factor identified in one case was contracting the credit through a banking app in a "one-click" flow — a hint of what consumer-protection literature calls a dark pattern: an interface design that deliberately reduces the informational friction a borrower needs to understand, before signing, the effects of the grace period, the capitalization, and the hybrid rate they are accepting. When the speed of digital contracting replaces a clear month-by-month CET disclosure, the "convenience" of subsidized credit turns into opacity.

What the forensic recalculation shows

In both cases, the same forensic methodology was applied: isolate the effect of interest capitalization during the grace period (replacing it with simple interest, proportional to elapsed time), correct the mismatch between the contracted amortization system and the floating index, and compare the resulting CET with the reference parameter of the credit program itself (BNDES/PRONAMPE), not the free-market rate. In one case, this correction reduced the total effective cost to a range between 15.28% and 16.05% per year — still far from the originally disclosed cost, but within a parameter consistent with the spirit of a subsidized emergency credit program.

What a business owner should verify before contracting

• Demand a month-by-month CET simulation, including the grace period — not just the rounded annual CET.
• Ask explicitly whether interest compounds daily or accrues on a simple basis during the grace period.
• Be wary of any contracting flow that can be completed in a few clicks, without a clear step presenting the projected payment schedule.

A well-structured credit program should not need speed to be accepted — it should be able to persuade through the transparency of its terms.

This article is part of a series on technical pathologies in business credit operations, based on expert opinions prepared by the author. Individual cases are treated in aggregate and anonymized form, with no identification of the companies or individuals involved.

Dr. Lincoln Sposito

PhD in Business Administration | Judicial Expert Witness | Data Science (MIT)

Specialist in banking audits and financial forensics, combining the statistical rigor of data science with the analysis of banking-system architectures to dismantle predatory charges against SMEs. Learn more about the expert →