NPV Calculator – Net Present Value & Investment Project Analysis 2026

NPV is the difference between the present value of all future cash inflows and the initial investment. It tells you how much value (in today's dollars) a project will create. If NPV > 0, the project adds value. If NPV < 0, the project destroys value.

$100 in the future is worth less than $100 today because: (1) Money can earn interest if invested today, (2) Inflation reduces purchasing power, (3) Future cash is uncertain. Discounting converts future dollars to today's equivalent value.

The discount rate is your required rate of return—the minimum return needed to justify an investment. It reflects: (1) Your cost of capital, (2) Project risk (higher risk = higher rate), (3) Opportunity cost (return you'd get elsewhere). Common rates: 8-12% for large firms, 15-25% for growth companies, 40-80% for startups.

Profit = revenues minus costs (simple). NPV = present value of all future profits, adjusted for time value of money and initial investment. NPV accounts for WHEN cash flows occur. A profitable project today might have negative NPV if returns are too slow. NPV is the superior metric for investment decisions.

Positive NPV means the project will generate returns ABOVE your required rate of return. If NPV = +$50K, the project creates $50K in value (in today's dollars) beyond your cost of capital. Generally: Accept positive NPV projects if capital is available.

Negative NPV means the project fails to meet your required return threshold. The project destroys value relative to your hurdle rate. Example: NPV = -$10K means the project returns 2% when you require 10%. Generally: Reject negative NPV projects unless strong strategic reasons exist (e.g., competitive necessity).

NPV = 0 means the project exactly meets your required return. It's a break-even point: the project generates your hurdle rate and nothing more. Decision: Often reject unless strategic factors favor it. If you can find alternatives with positive NPV, pursue those instead.

Yes! A project can be profitable (total revenue > total costs) but still have negative NPV if the returns come too slowly. Example: $100K investment returning $30K/year for 4 years = $20K profit, but NPV might be -$5K if discount rate is 10%. This means the timing doesn't justify your return requirement.

Use WACC (Weighted Average Cost of Capital) = (% debt × cost of debt) + (% equity × cost of equity). Adjust upward for project-specific risk. Example: If company WACC is 10% and project is riskier than average, use 12-15%. For startups, venture capitalists use 40-80%. When unsure, consult CFO or finance team.

NPV is superior for rigorous capital budgeting decisions because it: (1) Accounts for time value of money, (2) Considers all cash flows over project life, (3) Directly tells you value created. Use NPV when: investment is significant, long-term, or multiple projects need ranking. Payback is faster for quick risk assessment. ROI is simpler for communication but inferior analytically.

Rank projects by NPV (highest NPV first). If capital is limited, calculate Profitability Index (NPV ÷ initial investment) to see return per dollar invested. Example: Project A (NPV=$100K, cost $500K, PI=0.20) vs Project B (NPV=$80K, cost $300K, PI=0.27)—Project B is more efficient. When unconstrained, accept all positive NPV projects.

NPV handles unequal cash flows perfectly—discount each year's cash flow individually. Example: Year 1: $50K, Year 2: $100K, Year 3: $75K all at 10% discount rate. The calculator will discount each separately based on its timing. Variable cash flows are common and NPV is designed for them.

Two approaches: (1) Nominal dollars: Include inflation in cash flow projections and use nominal discount rate. (2) Real dollars: Remove inflation from cash flows and use real discount rate (approximately = nominal rate - inflation rate). Choose one approach and stick to it—mixing causes errors. Most companies use nominal approach.

Sensitivity analysis tests how NPV changes when you vary key assumptions (discount rate ±2%, revenue ±10%, etc.). It shows: (1) Which variables most impact NPV, (2) Project robustness (does NPV stay positive in worst case?), (3) Break-even points. Example: At what discount rate does NPV become zero (that's the IRR)?

NPV shows dollar value created (in today's dollars). IRR shows the percentage return the project generates. If IRR > discount rate, NPV will be positive. If IRR < discount rate, NPV will be negative. NPV is superior for decision-making; IRR is good for communicating the percentage return. Rank multiple projects by NPV, not IRR.

Terminal value (project sale price, salvage value, or continuing value) can dramatically impact NPV. Example: Real estate project with terminal sale in Year 20 might have terminal value of $500K. Include this in Year 20 cash flows—it often determines whether NPV is positive or negative. Don't ignore terminal value for long-horizon projects.

Profitability Index (PI) = NPV ÷ Initial Investment. Shows value created per dollar invested. PI > 1.0 = good project (creates more than $1 of value per $1 invested). When capital is scarce, rank projects by PI (not NPV). Example: Project A (NPV=$100K, PI=0.20) might be less efficient than Project B (NPV=$60K, PI=0.30) if you can only fund one.