IRR Calculator 2026 | Internal Rate of Return & Investment Analysis Tool

IRR (Internal Rate of Return) calculates the annualized return on investments with irregular cash flows — money going in and out at different times. Unlike simple return calculations, IRR factors in when each rupee went in or came out, giving you a time-weighted return. Enter your cash flows with dates, and it finds the discount rate that makes your net present value zero.

IRR is the metric for comparing investments when money moves at different times. It accounts for the time value of money — ₹1 lakh today is worth more than ₹1 lakh 5 years from now. Private equity, venture capital, and real estate investors use IRR as their primary benchmark. Downside: IRR can be misleading for projects with alternating positive/negative cash flows or when comparing investments of vastly different sizes. Pair it with NPV and payback period.

IRR solves: Σ(CFt / (1 + IRR)^t) = 0, where CFt = cash flow at time t. There's no direct formula — it requires iterative math, which is why a calculator is essential. Example: Invest ₹1,00,000 (negative), receive ₹40,000 in Year 1, ₹50,000 in Year 2, ₹60,000 in Year 3 → IRR ≈ 24.8%. The calculator runs the iterations automatically.

The math is precise. IRR's weakness is the reinvestment assumption — it assumes you can reinvest all intermediate cash flows at the same IRR rate, which is often unrealistic. If you receive ₹40,000 in Year 1, can you really reinvest it at 24.8%? MIRR (Modified IRR) fixes this by letting you specify a realistic reinvestment rate. IRR is a comparison tool, not a guarantee.

IRR handles multiple cash flows at different times (SIPs, partial withdrawals, irregular contributions). CAGR assumes a single lump sum — one investment, no additions, no withdrawals. For monthly SIP investments, use IRR/XIRR, not CAGR. If you bought a stock once and held it, CAGR is fine. If you added money at different points, IRR is the number you want.

IRR assumes cash flows occur at regular intervals (annual, quarterly, monthly). XIRR uses exact dates — it's IRR for irregular timing. Most real-world investments have irregular dates (contributions on different days, dividends on set dates, withdrawals when needed). XIRR is the more accurate metric for actual investment tracking, and most platforms report XIRR even if they call it IRR.

Yes — IRR is percentage-based and currency-agnostic. What changes by country: tax treatment affects your actual after-tax cash flows, and inflation rates affect real returns. Calculate pre-tax IRR first, then apply your country's tax rules to see actual returns. Use your local currency and exact dates for accurate results.

NPV (Net Present Value) tells you how much value an investment adds in today's money. IRR tells you the return rate. When IRR > your required rate (hurdle rate), NPV is positive. When IRR < hurdle rate, NPV is negative. For comparing mutually exclusive projects, NPV is often more reliable than IRR — especially when projects have different sizes. Use both together.

Yes — if your investment loses money overall. Invest ₹1,00,000, receive back ₹80,000 total → negative IRR. This happens when cash outflows exceed inflows or when returns are very poor over a long period. A negative IRR means you would have been better off not investing.

Context matters: Private equity/VC targets 20-30%+. Real estate typically 8-15%. Stock market (historical) ~10-15%. Fixed deposits 5-8%. Compare against your hurdle rate — the minimum return you'd accept for the risk you're taking. If your FD offers 7%, an investment with 9% IRR and significantly more risk might not be worth it.

MIRR (Modified IRR) fixes IRR's biggest flaw: it lets you specify a realistic reinvestment rate for intermediate cash flows instead of assuming reinvestment at the IRR rate. It also lets you specify a finance rate for negative cash flows. Use MIRR when: you expect to reinvest dividends/coupons at a rate different from the project's IRR, or when your project has both positive and negative cash flows in different periods.

Calculate IRR for each option with the same time period and same cash flow assumptions. The higher IRR wins — but only if: the projects are similar in size, duration, and risk. For different-sized projects, also compare NPV. For different durations, annualize both properly. Don't pick the higher IRR blindly — a 25% IRR on a ₹10,000 investment is ₹2,500; a 15% IRR on ₹10,00,000 is ₹1,50,000.