How it works
What this calculadora actually does
Tesouro SELIC calculadora is built to give you a clean, explainable answer without the usual wall of ads — type the numbers, read the result, keep moving.
Run the net number, not the headline rate: that is where surprises hide. Put the real cash figures in, even if they are rough — then run the sums and the rest of this page explains what the answer means.
Project returns on Brazilian Tesouro SELIC (LFT) with daily marked-to-market yield, custody fee and IR regressive table.
Following the method end to end
Here's what happens when you plug real numbers in.
Project returns on Brazilian Tesouro SELIC (LFT) with daily marked-to-market yield, custody fee and IR regressive table.
When to use this calculadora
Tesouro SELIC calculadora is aimed at people arriving with questions like these:
- "Tesouro selic 2029"
- "Rendimento tesouro selic"
- "LFT taxa custódia"
- "What is tesouro selic"
- "How to calculate tesouro selic"
- "Tesouro selic formula"
When to reach for something else
Every tool has an edge where it stops being the right answer. Tesouro SELIC calculadora is no exception:
- For legally binding tax or medical decisions — cross-check with HMRC, NHS or a qualified professional.
- For very large or very small extremes the rounding error outgrows the useful precision.
- When the underlying rate or threshold has changed since the page was last reviewed — always verify with the primary source.
- When the input you have is already a derived figure (net of something) — feeding it in as "gross" will double-subtract.
Mistakes we see over and over
Every time you run the sums for a new scenario, one of these creeps in — it's worth knowing them ahead of time.
- Entering a monthly figure into an annual field (or vice versa).
- Forgetting a leading zero on decimals (.5 instead of 0.5 breaks some inputs).
- Trusting a single reading when the underlying number naturally fluctuates.
- Comparing two answers that used different assumptions — always re-run both.
- Skipping the formula box. If you don’t understand the method, the answer is just a vibe.
The sources behind the numbers
Where the maths needs an external authority, we cross-check against:
- Tesouro Nacional
- B3
Works well alongside
If this question keeps coming up for you, the same cluster of tools usually comes next:
- SELIC Rate calculadora — Brazilian SELIC-linked returns — apply the daily and annualised SELIC to any amount and period.
- CDI calculadora — Brazilian CDI-indexed investments — apply percentage-of-CDI (e.g. 110% CDI) returns and net-of-IR tax.
- Poupança vs CDB calculadora — Compare Brazilian poupança savings (tax-free but lower rate) against CDB (subject to IR) on the same maturity and amount.
- Tesouro IPCA+ calculadora — Project returns on Tesouro IPCA+ (NTN-B) — real yield plus inflation (IPCA), IR regressive table and reinvestment.
How we keep this accurate
Our calculadoras run on pure, unit-tested functions — the same logic lives in the browser and in the CI test suite. When tax rates, thresholds or official figures move, the update lands within 24 hours of the announcement. You can read the editorial policy and corrections policy.
Found an out-of-date number on Tesouro SELIC calculadora or anywhere else in the Finance toolkit? Send it to the editorial desk and we'll patch it. Or browse the full calculadora directory for the next tool you need.