{"inputs":{"cashflows":[-1000000,80000,85000,90000,1400000]},"result":{"irr":0.14791,"irrPercent":14.791},"notes":"Per-period rate solved by bisection. The first cash flow is period 0 and is normally negative. Returns null when no rate can be bracketed — typically a series with no sign change.","disclaimer":"Quick screen only — not investment, tax, or legal advice. Excludes capital expenditures, income taxes, and reserves."}