Brazil legal rate under Civil Code art. 406
The Legal Rate is neither pure SELIC nor a fixed statutory percentage: since 08/30/2024, Law 14,905/2024 changed CC art. 406 to define default interest as the difference between the month SELIC and that same period inflation (IPCA-15), with a zero floor whenever that math turns negative. This calculator applies the rate month by month to the amount entered, within the period the rule is already in force.
The month-by-month sum includes one competency (March 2025) with a 0% rate, the result of the monthly floor whenever the month SELIC does not exceed that same period IPCA-15.
The CMN Resolution 5,171/2024 zero floor acts competency by competency: even with the other 11 months positive, this single month generates neither negative interest nor a discount on the total.
The calculator does not stretch the Legal Rate backward in time; it flags the effective-date mark and points to the right tool for that stretch.
The Legal Rate (from 30/08/2024) is SELIC minus projected IPCA-15, i.e. only the real interest. SELIC includes monetary correction + interest in one number and was used as a single index until 29/08/2024.
No. Since Law 14,905/2024, the art. 406 Legal Rate is the month SELIC minus that same period IPCA-15 (approximating the real interest rate), different from the full SELIC that applied before 08/30/2024 under STJ Theme 1,368, which did not discount inflation.
The internal calculation can turn negative when the month SELIC falls below that same period IPCA-15, but CMN Resolution 5,171/2024 sets a zero floor: in those months the applied interest stays at 0%, never a discount on the principal.
Not with this tool: the Legal Rate only applies from 08/30/2024 onward. For earlier periods, art. 406 interest followed the full SELIC set by STJ Theme 1,368, computed by the Judicial Monetary Correction tool.
No: CMN Resolution 5,171/2024 sets simple interest, so each month adds its percentage on the original amount, without accruing on top of interest already accumulated in previous months.
⚠️ Educational estimate. Confirm Legal Rate values in BCB monthly communications (bcb.gov.br).
| Month | Month's rate | Month's interest |
|---|---|---|
| 2024-08 | 0.6053% | R$ 60,53 |
| 2024-09 | 0.6762% | R$ 67,62 |
| 2024-10 | 0.7042% | R$ 70,42 |
| 2024-11 | 0.3859% | R$ 38,59 |
| 2024-12 | 0.1719% | R$ 17,19 |
| 2025-01 | 0.5894% | R$ 58,94 |
| 2025-02 | 0.9022% | R$ 90,22 |
| 2025-03 | 0.0000% | R$ 0,00 |
| 2025-04 | 0.3220% | R$ 32,20 |
| 2025-05 | 0.6232% | R$ 62,32 |
| 2025-06 | 0.7760% | R$ 77,60 |
| 2025-07 | 0.8349% | R$ 83,49 |
| 2025-08 | 0.9426% | R$ 94,26 |
| 2025-09 | 1.3060% | R$ 130,60 |
| 2025-10 | 0.7364% | R$ 73,64 |
| 2025-11 | 1.0938% | R$ 109,38 |
| 2025-12 | 0.8510% | R$ 85,10 |
| 2026-01 | 0.9675% | R$ 96,75 |
| 2026-02 | 0.9622% | R$ 96,22 |
| 2026-03 | 0.1557% | R$ 15,57 |
| 2026-04 | 0.7687% | R$ 76,87 |
| 2026-05 | 0.1983% | R$ 19,83 |
| 2026-06 | 0.4506% | R$ 45,06 |
| 2026-07 | 0.7066% | R$ 70,66 |
| 2026-08 | 1.1545% | R$ 115,45 |
| 2026-09 | 0.0000% | R$ 0,00 |
1 competência(s) sem dados na série da Taxa Legal (SGS 29543). Série disponível até 2026-08. Confirme os valores nos Comunicados mensais do BCB.
Legal basis: CC art. 406 (Law 14.905/2024); CMN Res. 5.171/2024 (simple interest, zero floor); BCB SGS series 29543.