Plain-language meaning
Internal rate of return is a return measure that discounts cash flows to a net present value of zero.
Example
A simplified IRR estimate is not the same as a full iterative cash-flow IRR.
Limitations
The meaning of IRR can depend on country, institution, industry or data source. For regulated, clinical, tax, legal or safety-sensitive questions, confirm the primary source linked from the related calculator.
Using IRR in calculators
Check how IRR is used on the related calculator before comparing results. The same word can point to a formula input, a rate, a category, a unit or a rule depending on the topic.
What to check
- Match the same unit, currency, time period or measurement basis used by the calculator.
- For health, tax, finance, safety or live-data topics, check the primary source linked from the related page.
- If IRR is used as a threshold, rate or category boundary, confirm the exact definition before relying on the estimate.
FAQ
Is IRR defined the same way everywhere?
Not always. Mathematical terms are usually stable, but financial, health, legal, tax, product and data terms can vary by country, institution or source.
Why does the definition matter?
A calculator result is easier to judge when the key term, unit and assumption are clear before you compare it with another source.