NPV CALCULATOR

NPV Calculator — Net Present Value, IRR & Profitability Index

Free net present value calculator for US businesses and investors. Compute NPV, IRR, and profitability index for even or uneven future cash flows, plus a sensitivity check on the discount rate.

1. Investment Details

Initial Investment ($) Enter as a positive value.

Discount Rate (%) Required return, cost of capital, or WACC.

Project Duration (Years) 1–10 years. In Uneven mode, only years 1–5 can be entered individually.

Cash Flow Type

2. Even Cash Flows

Annual Cash Flow ($) Same amount each year for the full project duration.

2. Uneven Cash Flows (Years 1–5)

Year 1 Cash Flow ($)

Year 2 Cash Flow ($)

Year 3 Cash Flow ($)

Year 4 Cash Flow ($)

Year 5 Cash Flow ($)

3. Reference & Notes

Notes

Reference Number

NPV ANALYSIS

Net Present Value Calculation

Reference: NPV-2026-001

Date:

Initial Investment $100,000.00

Discount Rate 10.00%

Project Duration 5 Years

Net Present Value (NPV) $13,723.60

                        Total PV of Cash Flows
                        $113,723.60
                    

Profitability Index 1.14

Internal Rate of Return (IRR) 17.23%

Decision ✅ Accept

Discount Rate Sensitivity

NPV at −2% $23,764.00 at 8.00%

                            NPV at Base Rate
                            $13,723.60
                            at 10.00%
                        

NPV at +2% $4,935.00 at 12.00%

Cash Flow Breakdown

Discounted Cash Flow

NPV Formula

NPV = Σ (CFₜ ÷ (1 + r)ᵗ) − Initial Investment

Where CFₜ = cash flow at time t and r = discount rate.

The NPV is $13,723.60, indicating the project is expected to generate value above the required return.

Notes

NPV analysis for investment decision making

This calculation is for informational and educational purposes. Actual investment outcomes depend on execution, market conditions, and other factors not modeled here. Consult a licensed financial or accounting professional for capital decisions.

Prepared By

Date

GUIDE

How to Use This NPV Calculator

This free NPV calculator — also called a net present value calculator — discounts future cash flows back to today to measure whether an investment creates or destroys value at your required return. Enter the initial investment, discount rate, project duration, and cash flows, and the calculator produces NPV, IRR, and the profitability index — plus a sensitivity check on the discount rate. Pair it with our Business ROI Calculator and the Business Valuation Calculator for a complete capital-budgeting picture.

Enter Investment Details

Enter the initial investment, discount rate (cost of capital or required return), and project duration.

Add Cash Flows

Choose Even for identical annual cash flows, or Uneven to enter year-by-year amounts.

Review NPV, IRR, and PI

See NPV, internal rate of return, profitability index, and the discounted cash-flow table.

Check the Decision Rule

Accept when NPV > 0 and IRR > discount rate. Reject when NPV < 0.

Save, Print or Export

Save a draft, print results, or download a PDF for your records.

NPV EDUCATION

What Does an NPV Calculator Calculate?

A net present value calculator converts a stream of future cash flows into a single dollar amount in today's money, then subtracts the initial investment. It is the primary tool of capital budgeting because it accounts for the time value of money — the fact that a dollar today is worth more than a dollar in the future.

Key NPV calculations

Net Present Value (NPV): Sum of discounted cash flows minus the initial investment.
Internal Rate of Return (IRR): The discount rate at which NPV equals zero — the project's effective annual return.
Profitability Index (PI): Present value of cash flows ÷ initial investment. PI above 1.0 indicates a value-creating project.
Discounted Cash Flow Table: Year-by-year cash flow, discount factor, and present value.
Payback period (via DCF): How long before cumulative discounted cash flows exceed the initial investment.
Sensitivity: How NPV changes when the discount rate moves up or down by 2 percentage points.

Who can use this NPV calculator?

CFOs and FP&A Teams: Screen capital projects before full budgeting.
Business Owners: Evaluate equipment, expansion, or acquisition decisions.
Real Estate Investors: Value property cash flows against a target IRR.
Startup Founders: Compare product investments against cost of capital.
Students and Educators: Explore time-value-of-money concepts with real numbers.

METHODOLOGY

NPV Calculator Methodology

MoneyTool uses standard corporate-finance formulas for NPV, IRR, and the profitability index. The calculator is transparent about what each metric does and does not capture.

1. Net Present Value (NPV)

NPV = Σ_t=1..n [CF_t ÷ (1 + r)^t] − Initial Investment

Where CF_t is the cash flow at year t, r is the discount rate, and n is the project duration in years.

2. Internal Rate of Return (IRR)

Find r such that NPV(r) = 0

IRR is solved using a hybrid bisection + Newton iteration. The bisection guarantees a bounded solution between −99% and +1000% (1e4); Newton accelerates convergence when the derivative is well-behaved. If no sign change is detected in the bracket, IRR is reported as N/A.

3. Profitability Index (PI)

PI = Total PV of Cash Flows ÷ Initial Investment

PI > 1.0 means the project creates value per dollar invested; PI < 1.0 means it destroys value. PI is especially useful when the budget is limited and you must rank competing projects.

4. Decision rule

Accept: NPV > 0 and IRR > discount rate.
Reject: NPV < 0 or IRR < discount rate.
Indifferent: NPV = 0 (project earns exactly the required return).

5. Sensitivity

The calculator reports NPV at three discount rates: −2%, base, and +2%. This shows how sensitive the project is to changes in the required return — critical for understanding project risk.

Important assumptions

Cash flows are received at the end of each year.
The discount rate is constant over the project period.
Taxes, depreciation, financing costs, and working capital changes are not modeled.
Cash flows are treated as conventional (one sign change) — IRR is not reliable for unconventional cash flows with multiple sign changes.
Uneven cash-flow mode supports up to 5 years individually; longer projects should use Even mode.
This is a planning estimate, not a full DCF valuation or capital-budgeting model.

E-E-A-T & SOURCES

NPV Information, Sources & Editorial Review

MoneyTool separates calculation results from financial education and personalized business advice. The calculator uses documented corporate-finance formulas, while external valuation guidance should be verified with authoritative sources.

Author and editorial responsibility

Methodology reviewed by the MoneyTool Finance Expert Team, a group of accountants, CPAs, and personal-finance analysts who maintain MoneyTool's calculator library and financial education content.

Last reviewed: September 2026 | Corporate-finance NPV, IRR, and PI

Next review: When calculation logic, supported inputs, or relevant guidance changes.

Authoritative U.S. finance and investment resources

U.S. Securities and Exchange Commission (SEC) — Investor.gov: SEC Investor.gov provides investor education on discounted cash flow, compounding, and evaluating investments.
U.S. Small Business Administration (SBA) — Business Guide: SBA Plan Your Business covers business planning, financial management, and capital decisions for small businesses.
U.S. Small Business Administration (SBA) — Loans: SBA Loan Programs covers SBA-backed financing used to fund capital projects evaluated with NPV.
Financial Industry Regulatory Authority (FINRA): FINRA Investor Education offers practical guidance on evaluating investments and understanding returns.
Internal Revenue Service (IRS) — Small Business Tax Center: IRS Small Business Tax Center covers depreciation, expense treatment, and business deductions that affect after-tax cash flows.
Federal Trade Commission (FTC) — Business Guidance: FTC Business Guidance covers advertising, disclosure, and fair-lending rules for business financing.
U.S. Bureau of Economic Analysis (BEA): BEA Economic Data provides national data useful for macro assumptions in capital planning.
Consumer Financial Protection Bureau (CFPB): CFPB Consumer Tools provides consumer-facing financial guidance that pairs with business finance education.

External resources are provided for education and verification. MoneyTool is not affiliated with or endorsed by the SEC, SBA, FINRA, IRS, FTC, BEA, or CFPB.

BEST PRACTICES

Tips for NPV Analysis

A single NPV number is only as good as its inputs. Test scenarios, choose a defensible discount rate, and pair NPV with IRR and PI before committing capital.

Use Realistic Cash Flows

Base projections on historical data and market evidence, not best-case assumptions.

Choose the Right Discount Rate

Use your WACC, cost of capital, or required return — a rate that reflects the risk of the specific project.

Run Sensitivity Analysis

Check NPV at ±2% or ±3% on the discount rate to see how robust the decision is.

Compare Projects

For capital rationing, use PI to rank projects with different sizes on a per-dollar basis.

Review Annually

Re-run NPV as actual cash flows come in and market conditions change.

Consult a Professional

For large capital decisions, validate NPV with a CFO, CPA, or financial advisor.

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LEARNING CENTER

Learn More About NPV and Capital Budgeting

Continue learning about net present value, time value of money, and investment valuation.

NPV Guide

Formulas, calculations, and applications of Net Present Value in capital budgeting.

Time Value of Money

The fundamental concept behind NPV, IRR, and discounted cash flow analysis.

Investment Valuation Methods

How NPV, IRR, PI, and payback differ and when to use each.

FAQ

Frequently Asked Questions About NPV

What is Net Present Value (NPV)?

NPV is the sum of the present values of all future cash flows, minus the initial investment. It measures whether an investment creates or destroys value at a given discount rate.

When should I accept a project based on NPV?

Accept a project when NPV is greater than zero, because the investment is expected to generate a return above the required discount rate. Reject when NPV is negative.

What is the difference between NPV and IRR?

NPV is a dollar value at a chosen discount rate. IRR is the discount rate at which NPV equals zero. NPV is generally preferred when comparing projects of different sizes or timing because IRR can mislead with non-conventional cash flows.

What is the Profitability Index (PI)?

The Profitability Index is the present value of future cash flows divided by the initial investment. A PI above 1.0 means the project creates value per dollar invested; a PI below 1.0 means it destroys value.

What discount rate should I use?

Use the project's cost of capital, your required rate of return, or the weighted average cost of capital (WACC) for company-wide projects. A higher discount rate reflects higher risk and time preference.

Is this NPV calculator free?

Yes. MoneyTool provides this net present value calculator free for educational and planning use.

Can I save my NPV analysis?

Yes. Save Draft stores the calculator inputs in your browser. Print Results and Download PDF can be used to keep a copy of the displayed analysis.

LEGAL

NPV Calculator Disclaimer

This NPV calculator provides estimates for informational and educational purposes. It does not constitute financial, legal, tax, accounting, or investment advice. Actual investment outcomes depend on execution, market conditions, taxes, financing structure, and other factors not modeled here.

Estimates only: Results depend on the inputs and assumptions described in the methodology.
Not a valuation: The calculator does not perform a full discounted cash flow valuation of a business.
Conventional cash flows assumed: IRR may not be reliable when cash flows change sign more than once.
Verify before committing capital: Engage a CPA or financial advisor for significant capital decisions.

Last methodology review: September 2026. Calculator logic and educational content should be reviewed again whenever the methodology, supported inputs, or relevant external guidance changes.