The grace period is, perhaps, the most misunderstood clause in Brazilian business credit. Sold — and often perceived by the borrower — as a relief period, a "breathing room" in cash flow before payments begin, it is, in technical practice, exactly the opposite: the period in which the outstanding balance grows the most, without a single installment being amortized. In forensic reviews of credit operations with a grace period, this pattern showed up in 17 of 20 cases analyzed — making it, by a wide margin, the most recurring pathology in the sample.
In this analysis
The mechanism, in simple terms
When a credit contract includes a grace period, here's typically what happens: the capital is disbursed, but payment of the first installment is postponed for a period — 60, 90, 180 days, sometimes more than a year. During that period, in theory, "nothing happens." In practice, the contracted interest keeps accruing on the balance, day after day. And in a significant share of the contracts reviewed, that interest is capitalized on a compound basis — interest on interest — before any amortization even begins.
The result is that, when the first installment finally comes due, the reference outstanding balance is already significantly higher than the amount originally disbursed. And since installments are usually calculated on that already-inflated balance, the operation's effective cost rises — silently, with no line in the contract explicitly telling the lay borrower so.
A didactic example, in round numbers
Imagine a company that borrows R$500,000 in working capital, with a six-month grace period before the first installment, at a rate of roughly 1.75% per month.
- Month 0: outstanding balance = R$500,000 (amount disbursed).
- If interest is capitalized month by month during the grace period, by the end of month six the balance is no longer R$500,000: it climbs to somewhere between R$550,000 and R$605,000, depending on the exact capitalization method and the ancillary charges financed alongside the principal (fees, IOF tax, insurance premium).
- In other words: before the company pays its first installment, the debt has already grown 10% to 20% — purely from the effect of the grace period.
This isn't an isolated hypothetical: in one of the audited operations, a R$500,000 balance climbed to roughly R$605,000 before the first installment came due — growth of about 21% with zero amortization. In another, smaller operation, the balance grew by roughly R$92,000 over 123 days of grace period. In a third, with an 11-month grace period, the effect was even more pronounced, due to the longer pre-amortization capitalization window.
Why this is, technically, a problem
The central point isn't that a grace period is, in itself, abusive — many companies genuinely need that breathing room to put working capital to work generating cash before payments start. The technical problem sits on two fronts:
Compound capitalization during the grace period — when not contracted clearly and in plain terms, this can run afoul of Brazilian Supreme Court Precedent 121 (Súmula 121), which bars anatocism — charging interest on interest — outside the cases expressly authorized by law.
Informational opacity — the contract, as a rule, states the monthly rate and the grace period length, but rarely gives the borrower a numerical simulation of how much the balance will grow by the first installment. The borrower signs knowing the rate and the term, but with no sense of the cumulative effect.
Add to this a frequent aggravating factor: when a grace period combines with a Price Table amortization schedule on an already-inflated balance, the negative-amortization effect can extend into the first installments paid after the grace period too — meaning that, even paying on time, the outstanding balance keeps growing for a few more months before it finally starts to fall.
Does your company have a contract with a grace period?
Request a technical simulation of the actual balance growth during the grace period.
How to protect yourself
Before signing any contract with a grace period, require the bank — in writing, not just verbally — to answer three simple questions:
- What will the exact outstanding balance be on the day the first installment is due? Not the isolated monthly rate — the projected absolute amount.
- Is interest during the grace period simple or compound? If compound, ask for the legal basis and reference index.
- Does the stated CET already incorporate the effect of the grace period, or does it only reflect the amortization period? A CET that ignores the grace period artificially understates the operation's real cost.
A grace period can, in fact, be a legitimate cash-flow management tool. But it's only real breathing room when the company knows, precisely, the size of the debt waiting on the other side of it.
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.
Frequently asked questions
What is a grace period in a business credit contract?
It's the initial period of the contract during which the company does not yet pay installments, but during which the contracted interest keeps accruing on the outstanding balance — and, in many cases, is capitalized before amortization even begins.
Does interest keep accruing during the grace period even if I'm not paying anything?
Yes. During the grace period, the disbursed capital continues to accrue interest normally; what changes is only the start date of installment payments. If capitalization is compound, the outstanding balance can grow 10% to 20% or more before the first installment is even due.
Is interest capitalization during a grace period always abusive?
Not necessarily, but when it happens on a compound basis and isn't clearly disclosed to the borrower, it can run afoul of Brazilian Supreme Court Precedent 121 (Súmula 121), which bars anatocism outside the cases expressly authorized by law. The core technical issue is transparency: the contract rarely shows the client the absolute amount the balance will reach by the end of the grace period.
Does the CET stated in the contract already reflect the effect of the grace period?
Not always. A Total Effective Cost that doesn't incorporate the balance growth during the grace period artificially understates the operation's real cost. Before signing, it's worth requiring, in writing, a numerical simulation of the projected outstanding balance on the day the first installment is due.
Dr. Lincoln Sposito
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 →