Selic real ex-ante
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The Selic real ex-ante calculator helps estimate the expected real interest rate by adjusting the nominal Selic rate against projected inflation (IPCA). It uses the formula: (1 + Selic) / (1 + IPCA) - 1. The result shows loan costs or investment returns in real terms before inflation occurs. This tool is useful for investment decisions or comparing loan costs in inflationary environments.
This calculator is particularly relevant in economies with significant inflation, like Brazil. For example, if the Selic is 12% and the projected IPCA is 8%, the real ex-ante rate will be approximately 3.7%. This allows investors to assess whether an investment generates real gains or only compensates for the cost of living increase.
Note that the Selic real ex-ante is a theoretical calculation based on projections. Actual inflation may differ, altering the final outcome. Negative real rates indicate that loan costs or investment returns do not exceed inflation, even before maturity.
Frequently asked questions
What is the Selic real ex-ante rate?
It is the real interest rate calculated before inflation occurs, adjusting the Selic rate by projected IPCA. It shows the real cost of loans or investment returns in terms adjusted for expected inflation.
What is this calculator used for?
It helps evaluate investment or loan decisions in inflationary contexts by showing expected real gains before inflation happens.
What does a negative real rate mean?
It indicates the nominal interest rate does not compensate for expected inflation. In this case, investments or loans do not generate real gains, only maintaining purchasing power.
How does actual inflation affect the outcome?
The ex-ante calculation uses projected inflation, not actual inflation. If real inflation differs, the final result may vary significantly.