Quick guide
How to use this calculator
- Enter a single internally consistent property scenario.
- Use the field labels to preserve each page's specific investment, transaction, lease, development, or lodging convention.
- Review the calculator-specific boundary before interpreting the result.
Calculation method
Calculation method
IRR is the annual rate that makes the NPV of the time-zero investment and five year-end cash flows equal zero.
Entered fixed decimals use exact rational arithmetic except the explicitly approximate IRR root. Money rounds only for display and supported nonzero amounts remain visible.
Worked example
Worked example
Investing 100,000 followed by four 8,000 cash flows and 128,000 in year five produces an annual IRR of approximately 11.1987%.
IRR is the annual rate that makes the NPV of the time-zero investment and five year-end cash flows equal zero.
Supported inputs
Precision and limits
Visible input limits
Amounts accept up to 30 digits and 12 decimal places and are capped at 1e12 per input. Whole-number periods are capped at the page's stated range; rates are capped at 1000%.
International scope
No currency, tax regime, lease law, lender threshold, local market feed, appraisal, or jurisdiction-specific charge is assumed.
Decision boundary
Results are visitor-entered arithmetic scenarios, not appraisals, forecasts, loan approvals, legal or tax determinations, or investment recommendations.
Calculator-specific assumptions
Cash flows are annual and periodic. Some cash-flow patterns have multiple IRRs or no supported root; IRR is not a recommendation.