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IRR measures the return in a project's dated cash flows, while ROIC measures operating profit against invested capital. Compare both measures on the same equipment investment, reconcile the inputs, and see why the percentages differ.
IRR vs ROIC compares the return in a cash-flow stream with operating profit earned on a capital balance. IRR answers how the timing of a project's payments and receipts translates into a return; ROIC answers how much after-tax operating profit a business earns on its invested capital during a period. They can describe the same investment and still produce different percentages.
The first distinction is time. A project IRR needs the initial outlay and the receipts and payments through the end of the project. A ROIC calculation needs operating profit for a period and a capital balance matched to that period.
| Question | IRR | ROIC |
|---|---|---|
| Main input | Project cash flows in date order | After-tax operating profit and invested capital |
| Time covered | The cash-flow life being evaluated | A stated operating period |
| Depreciation | Not a cash payment; affects cash through taxes | Reduces operating profit and asset book value |
| Capital recovery | Included when cash is received | Reflected in the capital schedule |
| Main management use | Review a proposed investment's cash returns | Review capital productivity in operations |
IRR = The rate r for which the sum of CFt / (1 + r)^t equals zero, including the initial cash flow at t = 0.
ROIC = Net operating profit after tax / Average invested capital.
Microsoft's IRR documentation defines IRR using regular cash-flow intervals and connects it to a zero net present value. For ROIC, Aswath Damodaran's financial definitions pair after-tax operating income with book capital invested in operating assets. This article uses average opening and closing invested capital; document that choice because beginning capital is another convention.
For the full capital mapping, use the separate guide to return on invested capital. The comparison here is about why a cash return and an accounting return differ.
Consider an illustrative US manufacturer buying equipment for $900,000 at the start of a project. The equipment operates for three annual periods, is depreciated evenly over those periods and has no disposal proceeds. There is no additional working capital, replacement spending or financing in this deliberately simple case.
The project schedule should identify the equipment payment, annual revenue, cash operating expenses, depreciation, operating taxes and any disposal proceeds. The asset register provides opening and closing net book values. Keep the approved forecast separate from actual results so a forecast IRR cannot be mistaken for an achieved return.
The operating schedule is identical in each year:
| Annual operating row | Calculation | Amount (USD) |
|---|---|---|
| Revenue | Project sales | 1,000,000 |
| Cash operating costs | Production and operating payments | 600,000 |
| Depreciation | 900,000 / 3 | 300,000 |
| EBIT | 1,000,000 - 600,000 - 300,000 | 100,000 |
| Operating tax | 100,000 × 25% assumed rate | 25,000 |
| NOPAT | 100,000 - 25,000 | 75,000 |
| Operating cash flow | 75,000 + 300,000 | 375,000 |
The assumed tax rate is a planning input, not a statement of a company's actual tax liability. All revenue is collected and all cash operating costs and taxes are paid in the period. Those assumptions explain why there is no receivables, inventory or payables adjustment.
The capital versus operating budget guide covers where the equipment purchase and ongoing costs belong. Keep that classification intact when assembling both returns.
Treat the equipment payment as time zero and each operating receipt as an annual period-end amount.
| Period | Cash-flow description | Net project cash flow (USD) | Present value at unrounded IRR (USD) |
|---|---|---|---|
| 0 | Equipment payment | -900,000 | -900,000.00 |
| 1 | Operating cash flow | 375,000 | 334,688.75 |
| 2 | Operating cash flow | 375,000 | 298,710.83 |
| 3 | Operating cash flow | 375,000 | 266,600.42 |
| Total | 225,000 | 0.00 |
The annual IRR is 12.04%, rounded to two decimal places. The present values use the unrounded rate, approximately 0.120443983, and round dollars only for display. Their sum is the check: the discounted receipts exactly recover the initial investment, within calculation precision.
With the cash flows in B2:B5, the workbook formula is:
=IRR(B2:B5)
For actual payment dates that are not regularly spaced, use a dated return calculation. Microsoft's XIRR documentation specifies paired cash-flow and date ranges and a 365-day basis. A monthly periodic return should also be labeled monthly rather than presented as an annual percentage.
Covirage is not affiliated with Microsoft.
The IRR financial model article covers the broader schedule; do not shorten this project to only the attractive receipt years.
The equipment is the only invested capital in this example. Depreciation reduces its book value even though the annual operating profit and cash receipts remain unchanged.
| Year | Opening capital (USD) | Closing capital (USD) | Average capital (USD) | NOPAT (USD) | ROIC |
|---|---|---|---|---|---|
| 1 | 900,000 | 600,000 | 750,000 | 75,000 | 10.00% |
| 2 | 600,000 | 300,000 | 450,000 | 75,000 | 16.67% |
| 3 | 300,000 | 0 | 150,000 | 75,000 | 50.00% |
Each denominator is opening capital plus closing capital, divided by two. Each return is $75,000 divided by that average, rounded to two decimal places. Closing capital also reconciles to opening capital less $300,000 of annual depreciation.
The third-year ROIC is high because the equipment is almost fully depreciated. Nothing in the operating table shows better sales, lower cash costs or higher profit. The project's IRR remains 12.04% across the full cash-flow sequence; averaging the annual ROIC percentages does not reconstruct it.
Use project IRR alongside net present value when reviewing an investment before approval. Check the timing assumptions, final recovery and dollars at risk. Compare an unlevered, after-tax project return with a finance-approved hurdle on the same basis; debt proceeds and interest belong in a different cash-flow view, covered in equity IRR versus project IRR.
Use ROIC in operating reviews to ask whether profit growth justifies capital tied up in assets and working capital. Read it with the asset-age schedule and cash requirements. A mature unit with depreciated equipment can show a higher accounting return than a new unit before either unit's operating economics have changed.
Bring a sample of your own project cash-flow workbook, operating statement and capital schedule: Covirage maps the columns, and its tools compute and check the figures. The external AI model explains the comparison with every figure traced to its rows. Create a free Covirage account, then set up your business and bring your file.
See Covirage for finance teams for the supporting context.
No. IRR uses the full cash-flow sequence, including the initial investment and final receipts. ROIC uses one period's operating profit and a defined capital balance. Depreciation, working capital, project life and the averaging convention can make them differ even when both calculations are correct.
Normally use net operating profit after tax rather than net income. Net income includes financing effects such as interest, while invested capital includes funding from both lenders and shareholders. Finance should approve the operating tax adjustment and reconcile it to the profit schedule.
Evaluate the project's cash flows and net present value at an approved discount rate, with IRR as a supporting measure. Use ROIC to track operating performance after launch. Neither percentage replaces a review of cash needs, assumptions, risks and the project's dollar value.