Free net present value calculator
See whether an investment is worth making. Enter a discount rate, an up-front investment, and the cash flow you expect each year. The calculator returns the net present value, a year-by-year discounted-cash-flow table, the total cash flow, and an accept-or-reject verdict — updated live, as you type.
On this page15 sections
| Year | Cash flow | Factor | Present value |
|---|---|---|---|
| 1 | $12,000 | 0.9091 | $10,909 |
| 2 | $12,000 | 0.8264 | $9,917 |
| 3 | $12,000 | 0.7513 | $9,016 |
| 4 | $12,000 | 0.6830 | $8,196 |
| 5 | $12,000 | 0.6209 | $7,451 |
| 6 | $12,000 | 0.5645 | $6,774 |
| 7 | $12,000 | 0.5132 | $6,158 |
| 8 | $12,000 | 0.4665 | $5,598 |
Estimates only, based on the values you enter. Not investment advice.
Results are estimates. Consult a professional.
What is net present value?
Net present value (NPV) is the single number that tells you whether an investment is worth making. It is the difference between the present value of every dollar a project is expected to bring in and the dollars you have to put in to get it — with future cash flows discounted back to today, because a dollar received in five years is worth less than a dollar in your hand now. A positive NPV means the project earns more than your required rate of return and adds value; a negative NPV means it destroys value. This net present value calculator returns that figure the moment you enter a discount rate, an initial investment, and the cash flows you expect each year.
NPV is the heart of discounted cash flow (DCF) analysis. DCF is the broad method of valuing something by its future cash flows; NPV is the specific number that method produces once you net the up-front cost back out. If you have ever heard an analyst say a project “clears its hurdle rate,” they mean its NPV at that discount rate is positive.
How to calculate net present value
Calculating NPV is a four-step process. The calculator above runs all four live as you type, but it is worth knowing what it is doing under the hood.
- Map out the cash flows. List the up-front outlay (the year-0 outflow) and the cash you expect each year afterward. Inflows are positive; the initial investment is a negative outlay.
- Choose a discount rate. This is your required return — often the cost of capital or WACC. It is the single most important assumption.
- Discount each future cash flow. Divide each year's cash flow by (1 + r) raised to that year's number to get its present value.
- Sum and subtract. Add up all the present values and subtract the initial investment. The result is the net present value.
A worked example using the net present value calculator
A small manufacturer is weighing a $50,000 machine expected to generate $12,000 of extra cash flow every year for eight years. Their required return — the discount rate — is 10%. Should they buy it? Here is exactly what the calculator does.
Step 1 — Enter the rate, the outlay, and the cash flows
They set the discount rate to 10%, the initial investment to $50,000, and each of years 1 through 8 to $12,000. The undiscounted cash flows total $96,000 — but that total ignores timing, so it overstates the real worth of the project.
Step 2 — Discount each year back to today
| Year | Cash flow | Discount factor | Present value |
|---|---|---|---|
| 1 | $12,000 | 0.9091 | $10,909 |
| 2 | $12,000 | 0.8264 | $9,917 |
| 3 | $12,000 | 0.7513 | $9,016 |
| 4 | $12,000 | 0.6830 | $8,196 |
| 5 | $12,000 | 0.6209 | $7,451 |
| 6 | $12,000 | 0.5645 | $6,774 |
| 7 | $12,000 | 0.5132 | $6,158 |
| 8 | $12,000 | 0.4665 | $5,598 |
| Total PV | $96,000 | — | $64,019 |
Each $12,000 is divided by (1.10) raised to its year number. The present values sum to $64,019.
Step 3 — Subtract the initial investment
The NPV decision rule: accept if NPV is positive
Once you have the number, the decision is mechanical. The NPV rule is one of the cleanest in finance:
- NPV > 0 — accept. The project earns more than your discount rate and adds value. The calculator shows an Accept verdict.
- NPV < 0 — reject. The project earns less than your required return and destroys value.
- NPV = 0 — indifferent. The project earns exactly your discount rate. It neither creates nor destroys value; non-financial factors break the tie.
When you are choosing between several projects you cannot fund at once — mutually exclusive choices — pick the one with the highest NPV, not simply the first that turns positive. NPV measures value in actual dollars, which is what ultimately matters to owners.
How to choose a discount rate
The discount rate is the assumption NPV is most sensitive to — change it a few points and a project can flip from accept to reject. There is no single “right” rate; you pick the return you could reasonably earn elsewhere at comparable risk.
- Company-funded projects. Use the weighted average cost of capital (WACC) — the blended after-tax cost of the firm's debt and equity. Build it with the WACC calculator.
- Equity-only or personal investments. Use your required return on equity, or the return on the best alternative of similar risk you are giving up.
- Higher-risk projects. Add a risk premium. Riskier cash flows deserve a higher discount rate, which lowers their present value and the resulting NPV.
A common practice is to test a range — say, your base rate plus or minus two points — and see whether the accept/reject verdict holds. If the project is positive across the whole range, the decision is robust; if it flips, the discount rate deserves more scrutiny than the cash-flow forecast.
NPV vs. IRR — which should you use?
Net present value and internal rate of return are the two pillars of capital budgeting, and they answer related but different questions. NPV tells you the dollar value a project adds at a discount rate you supply. IRR is the discount rate that would make the NPV exactly zero — a percentage you compare against your required return.
| NPV | IRR | |
|---|---|---|
| Answers | How much value, in dollars | What return, as a percentage |
| You supply | A discount rate | Nothing — it is solved for |
| Accept when | NPV > 0 | IRR > required return |
| Best for | Comparing or sizing projects | Quick rate-of-return intuition |
NPV and IRR usually agree on a single project. They can disagree on mutually exclusive projects of different sizes or with unusual cash-flow patterns.
When the two conflict — typically with projects of very different scale, or cash flows that switch sign more than once — trust NPV. IRR can produce multiple answers or none with non-standard cash flows, and its reinvestment assumption is often unrealistic. Use the IRR calculator alongside this one to see both numbers for the same cash flows.
What a positive or negative NPV really means
A positive NPV does not mean the project simply makes money — it means it makes more than your discount rate already demands. The discount rate bakes in your required return, so clearing it is a higher bar than turning a nominal profit. An NPV of +$14,000 says the project is worth about $14,000 more to you today than it costs, after you have already been compensated for the time value and risk of your money.
A negative NPV is not a sign the project loses money in raw terms; it can still throw off positive cash. It means those cash flows are not large enough or early enough to beat what you could earn elsewhere at the same risk. In that case the capital is better deployed somewhere with a positive NPV — even doing nothing and earning your discount rate would leave you better off.
Limitations of net present value
NPV is the gold standard for investment appraisal, but it rests on assumptions that are only as good as your inputs. Knowing where it strains keeps you from over-trusting a single number.
- It depends on forecasts. Future cash flows are estimates. The further out and the more uncertain they are, the shakier the NPV — garbage in, garbage out.
- It assumes one constant rate. Real costs of capital shift over a project's life, but the basic formula applies a single discount rate to every year.
- It ignores non-financial factors. Strategic fit, environmental impact, and optionality do not appear in the math, yet often matter to the decision.
- It assumes reinvestment at the discount rate. Interim cash flows are implicitly reinvested at r, which may not hold if conditions change.
The practical response is not to abandon NPV but to stress-test it: run a few discount rates, flex the cash-flow forecast up and down, and check whether the accept/reject call survives. A decision that holds across reasonable scenarios is one you can stand behind.
Where NPV is used in practice
NPV shows up wherever money is committed today for cash flows tomorrow:
- Capital budgeting. Deciding whether to buy equipment, open a location, or launch a product line.
- Business and asset valuation. The discounted-cash-flow value of a company is an NPV of its projected free cash flows.
- Real-estate and infrastructure. Appraising a property or a long-lived asset by the rental or toll income it will generate.
- Personal finance. Comparing a lump sum today against a stream of future payments — the same logic behind a pension-versus-lump-sum choice.
For related time-value tools, pair this with the present value, future value, and future value of an annuity calculators. Or browse the full Finance calculators shelf.
Methodology and sources
This calculator applies the standard net present value formula — NPV = −initial investment + Σ CF_t / (1 + r)^t — discounting each year's cash flow at the rate you supply and netting out the up-front outlay. It is the same calculation as Excel's NPV function combined with the initial outlay, and the foundation of discounted-cash-flow analysis taught in every corporate-finance curriculum. Figures are estimates based on the inputs you enter and are not investment advice.
Corporate Finance Institute — Net Present Value (NPV).Frequently asked questions about the free net present value calculator
About this net present value calculator
This net present value calculator runs entirely in your browser. Every figure you enter stays on your device — nothing is sent to a server, logged, or shared. It discounts each year's cash flow at the rate you set, sums those present values, subtracts your initial investment, and applies the NPV decision rule (accept if NPV is positive), updating instantly as you type.
Calculators Cloud offers 400+ free tools with no sign-up. The whole Finance calculators shelf includes IRR, Present value, and WACC tools alongside this one. Or browse the full calculator directory.