Simulate installments, IOF, CET and total interest for different loan types.
Personal loan modalities vary significantly in rate. Consignado (payroll-deductible) has the lowest rates because default risk is minimal; FGTS-backed loans use the FGTS balance as collateral; CDC (Crédito Direto ao Consumidor) is used for consumer-goods financing; and unsecured personal loans have the highest rates. This tool calculates installments using the PRICE system with a fixed payment, estimates IOF from the term, and computes the CET assuming the amount actually received is the principal minus IOF. That way you compare not just the installment, but the real total cost of each option.
The installment is computed with the PRICE table, which keeps the payment fixed from start to finish: each month, interest is charged on the outstanding balance and amortization is whatever remains of the payment. IOF is estimated from the contract term, combining the daily rate (capped at 365 days) with the fixed component on the principal, and it is shown separately so you can see its weight.
The estimated CET assumes the amount actually received is the principal minus IOF, and it is the rate that equates that amount to the stream of installments. That is why it sits above the nominal interest rate, and it is the number to use when comparing loan types, not the rate in isolation.
Illustrative example, R$ 10,000 over 24 months: the fixed IOF component is 0.38% of the principal, about R$ 38, and the daily part (0.0041% per day, capped at 365 days) is around R$ 150, adding up to roughly R$ 188 of estimated IOF (illustrative values). This IOF enters the total cost even when it is embedded in the financed amount.
The same amount can carry very different installments depending on the modality: a consignado loan typically runs around 1%–2% per month, while an unsecured personal loan can range from 3% to 7% per month. Simulating each option makes it clear how much the collateral (payroll or FGTS) lowers the cost of credit.
Consignado loans for civil servants and INSS beneficiaries have a rate cap set by the government; for ordinary personal loans and credit cards there is no fixed legal cap, though Banco Central regulates the transparency of the charges. Secured modalities, consignado and FGTS-backed, tend to be cheaper precisely because they reduce the lender's risk.
This is an educational simulation: real rates depend on the bank, your credit profile and the modality. Before signing, compare the CET across offers and remember your right to early settlement with a proportional reduction of interest, guaranteed by the Consumer Protection Code.
Paste the code into your HTML and the tool shows up on your page, without J-Kit's navigation and ads. It still runs in the browser of whoever visits your site.
<iframe
src="https://jkit.tools/embed/en-US/personal-loan-calculator"
width="100%"
height="600"
style="border:0"
loading="lazy"
title="Personal Loan Calculator (Brazil)"
></iframe>These references help contextualize formulas, standards, APIs and limitations used on this page. They do not replace professional validation when a result has legal, financial, medical or operational impact.
In consignado, installments are deducted directly from the payroll or INSS benefit, which reduces default risk for the bank and allows much lower rates, typically 1%–2% per month versus 3%–7% for unsecured personal loans. In exchange, consignado requires eligible employment or a benefit and respects a maximum deductible margin of your income. When available, it is usually the cheapest option.
⚠️ Educational simulation. Actual rates depend on the bank, credit profile, and contracted modality.
PRICE system. IOF: Decreto 6.306/2007.
Outstanding balance
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