# Capital Expenditure (CapEx) ROI Calculator Evaluate capital expenditure projects using return on investment, simple payback period, and net present value metrics before you invest. --- - **Canonical URL:** https://dothecalculation.com/calculators/capex-roi-calculator - **Category:** Business tools - **Publisher:** Do The Calculation (https://dothecalculation.com) - **Cost:** Free, no account or sign-up required - **Privacy:** Runs entirely in the browser; inputs are never sent to a server - **Methodology:** https://dothecalculation.com/methodology --- ## Capital Expenditure (CapEx) ROI & NPV Calculator Enter your initial capital outlay, expected annual cash inflow, useful life, and cost of capital to calculate payback period, CapEx ROI, and Net Present Value (NPV). - CapEx ROI and total lifetime net inflow - Simple payback period in years - NPV discounted at your cost of capital ## Capital Expenditure (CapEx) ROI Fundamentals Capital expenditure (CapEx) is money spent on long-term assets — machinery, vehicles, real estate, or major technology infrastructure — that a business expects to generate returns over several years rather than a single accounting period. Because the payoff is spread out, evaluating a CapEx decision requires more than comparing the purchase price to the revenue it generates; it requires accounting for how much cash actually comes back, how long that takes, and what that future cash is worth today. This calculator works from four inputs — initial cost, annual cash flow, useful life, and cost of capital — and returns three things: the simple lifetime net inflow and ROI, the simple payback period, and the discounted Net Present Value (NPV). It does not model Internal Rate of Return (IRR), depreciation tax shields, or lease-vs-buy comparisons; those related concepts are covered further down. ## How to Use This Calculator Enter the initial capital investment (the upfront purchase or construction cost), the average annual net cash inflow you expect the asset to generate, its useful life in years, and your cost of capital — the discount rate reflecting what you could otherwise earn on that money, or what it costs you to borrow it. The calculator immediately returns the total lifetime net inflow, the simple payback period (how many years of cash flow it takes to recover the initial cost, ignoring the time value of money), the CapEx ROI percentage, and the NPV — the same cash flows discounted back to today's dollars at your cost of capital. ## The CapEx ROI and NPV Formulas The calculator uses these formulas: $$\text{Total Lifetime Net Inflow} = (\text{Annual Cash Flow} \times \text{Useful Life}) - \text{Initial Cost}$$ $$\text{CapEx ROI (\%)} = \frac{\text{Total Lifetime Net Inflow}}{\text{Initial Cost}} \times 100$$ $$\text{Simple Payback Period} = \frac{\text{Initial Cost}}{\text{Annual Cash Flow}}$$ Net Present Value discounts each year's cash flow individually at the cost of capital rate \(r\), then subtracts the initial cost: $$\text{NPV} = \sum_{t=1}^{N} \frac{\text{Annual Cash Flow}}{(1 + r)^t} - \text{Initial Cost}$$ Because NPV discounts cash further the longer you have to wait for it, NPV is always lower than the simple (undiscounted) lifetime net inflow — the gap between the two widens with a higher cost of capital or a longer useful life. ## Worked Example: $50,000 Equipment Purchase A manufacturer buys a $50,000 piece of equipment expected to generate $15,000 in net annual cash flow for 5 years, evaluated at an 8% cost of capital. Total lifetime net inflow: ($15,000 × 5) − $50,000 = $25,000. CapEx ROI: $25,000 ÷ $50,000 × 100 = 50%. Simple payback period: $50,000 ÷ $15,000 ≈ 3.33 years. NPV at 8%: discounting each of the five $15,000 inflows back to today and subtracting the $50,000 cost gives an NPV of approximately $9,891 — positive, meaning the project is expected to earn more than the 8% cost of capital and is worth pursuing on a discounted basis. ## Why NPV and Simple ROI Can Disagree Simple CapEx ROI and payback period ignore the time value of money — a dollar of cash flow in year five is treated the same as a dollar today. NPV corrects for this by discounting future cash flows at your cost of capital, so it better reflects whether the investment beats the return you could get elsewhere with that same capital. A project can show a healthy simple ROI while having a low or negative NPV if the cost of capital is high or the cash flows are backloaded late in the asset's useful life. When the two disagree, NPV is the more reliable decision signal for capital budgeting — it is the standard measure used in corporate finance to approve or reject capital projects. ## Beyond This Calculator: Related CapEx Concepts A few concepts commonly used alongside CapEx ROI are not calculated directly on this page. Internal Rate of Return (IRR) is the discount rate at which NPV equals zero — you can approximate it here by adjusting the cost of capital input until the NPV result approaches $0. Depreciation tax shields (the tax savings from deducting depreciation) reduce the effective cost of an asset but require your tax rate and depreciation schedule, which this calculator does not take as inputs — use the [depreciation calculator](/calculators/depreciation-calculator) to model those separately. Lease-vs-buy comparisons and Equivalent Annual Cost (EAC) analysis for assets with different useful lives are separate financial models beyond this page's scope. ## Related Calculators Compare a capital project against your company's overall funding cost with the [WACC calculator](/calculators/wacc-calculator) — a reasonable proxy for the cost of capital input above — or check whether an acquisition target's earnings justify its price with the [business valuation calculator](/calculators/business-valuation-calculator). To model the tax impact of depreciating the asset you just purchased, use the [depreciation calculator](/calculators/depreciation-calculator), and to check whether the purchase strains short-term cash reserves, run the numbers through the [working capital calculator](/calculators/working-capital-calculator). ## Frequently asked questions ### What is Capital Expenditure (CapEx)? CapEx represents major long-term investments in physical or fixed assets — machinery, real estate, vehicles, or technology infrastructure — that are capitalized on the balance sheet and depreciated over time, rather than expensed immediately. ### How does this calculator compute CapEx ROI? It computes total lifetime net inflow as (Annual Cash Flow × Useful Life) − Initial Cost, then divides that by Initial Cost and multiplies by 100 to get CapEx ROI. ### How does this calculator compute Net Present Value (NPV)? It discounts each year's annual cash flow back to today's dollars at your entered cost of capital, sums those discounted values, and subtracts the initial cost. A positive NPV means the project is expected to return more than your cost of capital; a negative NPV means it is not. ### Does this calculator compute Internal Rate of Return (IRR)? No. IRR is the discount rate at which NPV equals zero. You can approximate it by trying different cost-of-capital values in this calculator until the NPV result gets close to $0 — that rate is your approximate IRR. ### What is the difference between simple payback period and NPV? Simple payback period tells you how many years of cash flow it takes to recover your initial cost, ignoring the time value of money. NPV accounts for the time value of money by discounting future cash flows, giving a more accurate picture of whether the investment is worthwhile. ### What counts as "annual cash flow" in this calculator? It should be the net cash the asset generates each year after operating costs — for example, labor savings, added revenue, or reduced expenses attributable to the asset. It is treated as a flat, equal amount for every year of the useful life. ### What cost of capital should I use? Use your company's weighted average cost of capital (WACC) if you know it — see the WACC calculator — or a conservative estimate of your borrowing rate or required rate of return if you don't have a formal WACC figure. ### What is a good CapEx ROI or payback period benchmark? There is no universal benchmark; it depends on industry and asset type. Many businesses target a payback period under 3-5 years for equipment purchases and require a positive NPV at their actual cost of capital before approving a capital project. ### What is the difference between CapEx and OpEx? CapEx is a major upfront investment in an asset owned long-term and depreciated over time. OpEx covers ongoing operational expenses, such as rent, utilities, or subscriptions, that are deducted in the period incurred. ### Does this calculator account for taxes or depreciation? No. It works from the pre-tax annual cash flow you provide. Depreciation tax shields reduce the effective cost of an asset but require your tax rate and depreciation method — use the depreciation calculator to model that separately. ### Can useful life and annual cash flow change from year to year in real projects? Yes, but this calculator assumes a flat annual cash flow for simplicity. If your project has cash flows that vary significantly year to year — such as a ramp-up period or decline near the end of life — treat this calculator's output as an approximation and consider modeling each year separately for major investment decisions. ## Related concepts - **Net Present Value (NPV)** — The value today of a series of future cash flows, discounted at a chosen rate to account for the time value of money. - **Payback Period** — The time required for an investment's cash inflows to recover its initial cost, without adjusting for the time value of money. - **Cost of Capital** — The discount rate representing what a business could otherwise earn on its money, used to judge whether a project's returns are worth pursuing. ## Related guides - [Business Valuation Methods: A Practical Owner Guide](https://dothecalculation.com/blog/business/business-valuation-methods) — Compare market, income, and asset valuation methods, normalize revenue and profit, and use multiples as a planning range rather than a formal appraisal. ## Related calculators - [Weighted Average Cost of Capital (WACC) Calculator](https://dothecalculation.com/calculators/wacc-calculator) — Estimate Weighted Average Cost of Capital, after-tax cost of debt, and capital weights to evaluate investment and financing decisions. - [LBO Model & Debt Schedule Calculator](https://dothecalculation.com/calculators/lbo-model) — Evaluate leveraged buyout returns, debt payoff schedules, multiple of invested capital, and internal rate of return metrics. - [Business Valuation Calculator](https://dothecalculation.com/calculators/business-valuation-calculator) — Estimate your business value using practical valuation methods such as earnings multiples and asset-based approaches for buyers or investors. - [Franchise ROI & Payback Calculator](https://dothecalculation.com/calculators/franchise-roi-payback-calculator) — Model multi-year cash flows to calculate return on investment and payback period for a franchise location before you commit to buying one. - [Startup Equity Dilution & Cap Table Simulator](https://dothecalculation.com/calculators/startup-equity-dilution-calculator) — Simulate venture capital seed and Series A funding rounds, share pricing, option pool dilution, and founder equity ownership stakes. - [Discounted Cash Flow (DCF) Calculator](https://dothecalculation.com/calculators/corporate-valuation-dcf-calculator) — Estimate a company enterprise and equity value using a multi-year discounted cash flow model with terminal value assumptions. --- _This calculator is for educational and financial forecasting purposes only. Actual financial outcomes, probability distributions, and business returns depend on market variables, operational execution, data accuracy, and corporate strategy. Validate all financial models with certified financial analysts and accounting tools._ --- _Source: [Do The Calculation](https://dothecalculation.com/calculators/capex-roi-calculator). Quote freely with attribution and a link to this page._