Finance & Investment
IRR Calculator
IRR — IRR Calculator finds the internal rate of return — the discount rate that makes the net present value of your cash flows zero — by iteration. This page runs that same calculation on your numbers, in your browser: no signup, no uploads, nothing stored.
IRR Calculator lets you work out the internal rate of return in seconds: enter your equal-period cashflows for the annualised return, all worked out locally in your browser.
Estimate only. Not financial, investment, tax, retirement, pension, crypto, or legal advice. Returns, rates, fees, taxes, inflation, market prices, product rules, and government schemes can change. Verify with official sources or a qualified professional before relying on results.
About this calculator
Get irr right and the rest of the task gets easier. IRR Calculator finds the internal rate of return — the discount rate that makes the net present value of your cash flows zero — by iteration. It matters any time money changes value over time — savings, loans, investments, prices and pay all reduce to these relationships. If 100,000 invested returns 120,000 in one year, the IRR is (120,000/100,000) − 1 = 20% . Multi-year cash flows are solved iteratively. The tool above does the same computation in your browser — free, private, nothing stored.
How to use
- Enter the period-zero cashflow first, usually a negative investment.
- Add each subsequent period's cashflow, separated by commas or new lines.
- Keep the periods equal, since IRR assumes a regular interval.
- Tap Calculate to see the internal rate of return per period.
Why use the IRR Calculator
Instant
Every figure is computed on your device the moment you tap Calculate.
Private
Your numbers stay in your browser; nothing is sent to a server or saved.
Free
No signup, no paywall, and no ads placed inside your results.
Works offline
Once the page has loaded it keeps working even on a weak connection.
Mobile-first
Laid out for phones and tablets just as much as for desktops.
Honest estimates
Uses simplified formulas for educational estimates; actual results vary with taxes, fees, compounding rules, market returns, scheme rules, inflation, and local regulations.
Common uses
Use it for ranking investment options
Use it for capital-budgeting decisions
Use it when evaluating equal-period cash flows
Use it when comparing two projects
IRR in investment appraisal
Use it when checking a return against a hurdle rate
Technical notes
IRR Calculator finds the internal rate of return — the discount rate that makes the net present value of your cash flows zero — by iteration.
Uses the cash flows you enter and solves for the rate that makes the net present value zero; it doesn't predict future performance and excludes fees and taxes unless they're in the cash flows.
All arithmetic runs in your browser using double-precision floating point, so extreme inputs may show tiny rounding differences.
Worked example
If 100,000 invested returns 120,000 in one year, the IRR is (120,000/100,000) − 1 = 20%. Multi-year cash flows are solved iteratively.
FAQ
What does the IRR represent?
It is the per-period discount rate that makes the net present value of all the cashflows equal to zero, expressed as a percentage.
Does the IRR Calculator send my data to a server?
No. The IRR Calculator runs entirely in your browser with JavaScript; the values you enter never leave your device and nothing is uploaded or saved.
In what order should I enter cashflows?
Enter them in time order starting at period zero; the first value is typically a negative outlay and later values are returns.
When should I use XIRR instead?
Use XIRR when the cashflows fall on irregular calendar dates; IRR is only correct when each flow is one equal period apart.