Updated August 31, 2026
What CET brings together
Total Effective Cost expresses the charges and expenses tied to a credit operation as a single rate. Interest is only one component; the regulatory calculation uses actual cash flows and dates.
net amount received = present value of payments + expenses
Hypothetical proposal
| Item | Base scenario | With cost |
|---|---|---|
| Principal | BRL 300,000 | BRL 300,000 |
| Term and interest | equal | equal |
| Extra monthly cost | BRL 0 | BRL 150 |
BCB reference rate for fixed-rate real-estate financing: 2026-07, median of 3 institutions.
Parameters used
- Financed amount
- R$300,000.00
- Term
- 360 months
- Interest rate
- 14.9797% effective per year
- System
- SAC
- Monthly adjustment
- —
- Extra amortization
- —
Calculated results
| Scenario | Without monthly cost | With BRL 150 monthly |
|---|---|---|
| First payment | R$4,343.33 | R$4,493.33 |
| Last payment | R$844.29 | R$994.29 |
| Total interest | R$633,557.33 | R$633,557.33 |
| Total paid | R$933,557.33 | R$987,557.33 |
| Effective term | 360 months | 360 months |
| Accumulated adjustment | R$0.00 | R$0.00 |
Selected installments
| Payment no. | Payment | Interest | Amortization | Closing balance |
|---|---|---|---|---|
| 1 | R$4,493.33 | R$3,510.00 | R$833.33 | R$299,166.67 |
| 12 | R$4,386.08 | R$3,402.75 | R$833.33 | R$290,000.04 |
| 60 | R$3,918.08 | R$2,934.75 | R$833.33 | R$250,000.20 |
| 180 | R$2,748.09 | R$1,764.76 | R$833.33 | R$150,000.60 |
| 360 | R$994.29 | R$9.76 | R$834.53 | R$0.00 |
What the simulator covers
The monthly cost field shows higher nominal outflows but does not calculate regulatory CET. It omits some initial expenses, exact dates, taxes, net funds released and regulatory rules.
Use the CET disclosed by the lender and inspect its composition. Do not try to reconstruct it by simply adding percentages.
What may differ in a contract
- The lender calculates and discloses CET from the proposal's actual cash flows, dates and costs.
- Insurance, optional services and third-party expenses must be identified in the documents.
Limits of this analysis
- Mapa das Parcelas does not calculate or reproduce regulatory CET.
- The module only shows a hypothetical monthly cost and does not replace the lender's worksheet.
Sources and review
- Central Bank of Brazil — credit contracting and CET guidance · July 27, 2026
- Central Bank of Brazil — Citizen Calculator · July 27, 2026