Blog · Finance metrics and formulas · Finance and FP&A teams
ROE and ROI compare earnings with different investment bases. Work the same business workbook both ways, reconcile the numerators, and see when company equity returns and project returns belong in separate comparisons.
ROE and ROI differ mainly in what sits beneath the return: ROE uses company shareholders' equity, while project ROI uses the cost of a specified investment. They also usually use different profit scopes, so a higher project ROI does not show that the company has a higher return on owners' capital.
Return on equity asks how much net income the company earned relative to its owners' capital. Return on investment asks what a defined investment earned relative to the cost assigned to that investment. The investment might be a project, a business unit, or another agreed management boundary.
ROE = Net income / Average shareholders' equity × 100%
Project ROI = Project net gain / Defined project investment cost × 100%
Use earnings and equity belonging to the same ownership scope. For common-shareholder ROE, that means earnings available to common shareholders and average common equity. The example below has no preferred stock or noncontrolling interests, so total company net income and equity fit together.
The CFA Institute's financial analysis techniques reading groups ROE among investment return ratios and explains that DuPont analysis separates its operating and financing components. Project ROI needs an additional definition because the investment boundary varies. OpenStax's investment-performance discussion describes the choices involved in defining income and invested capital.
| Question | ROE | Project ROI |
|---|---|---|
| What is being evaluated? | The company or defined shareholder group | One identified investment |
| Numerator | Net income for the ownership scope | Incremental net gain for the project |
| Denominator | Average shareholders' equity | Explicitly defined investment cost |
| Period | The income reporting period | The stated project measurement window |
| Funding effect | Equity and financing structure matter | Depends on the convention; often evaluated before funding choices |
| Typical owner | Controller and corporate finance | Project sponsor with finance review |
The financial ratios guide gives the existing ROE formula and DuPont bridge. The separate return on assets guide compares ROA, ROE, and ROIC; those company-capital measures should not be substituted for a general project ROI.
For ROE, bring the company income statement, opening and closing balance sheets, and equity rollforward. The SEC's financial statements guide explains that the income statement covers earnings over a period, the balance sheet reports a point-in-time position, and the statement of shareholders' equity reports changes in ownership interests.
That period-versus-date distinction is why average equity is generally more useful than an unexplained closing balance. A simple opening-and-closing average works when capital movements are reasonably spread through the year. If a large contribution or repurchase happens near the reporting date, use a monthly or more closely time-weighted average and document it.
For project ROI, bring the spending register and incremental benefit schedule, with project IDs, dates, account categories, and actual-versus-forecast labels. Decide whether the project uses pretax or after-tax gain and whether investment cost means launch spending alone or all project costs. Our return on investment guide works through a total-project-cost convention; the example here explicitly uses launch investment as its denominator.
A fictional Colorado distributor measures one completed calendar year. Its order-renewal project generated incremental revenue and incurred ongoing costs plus an upfront launch cost. All launch spending is expensed in the year; there are no project capital assets or working-capital timing differences in this example.
Finance has supplied a project tax allocation. The ROI below uses after-tax project gain divided by the gross launch investment, so its convention is visible rather than implied.
| Income-statement bridge | Calculation | Amount (USD) |
|---|---|---|
| Incremental project revenue | Supplied sales schedule | 400,000 |
| Ongoing project expense | Supplied cost schedule | 120,000 |
| Launch investment, expensed | Supplied implementation register | 200,000 |
| Project pretax income | 400,000 − 120,000 − 200,000 | 80,000 |
| Project tax expense | Supplied tax allocation | 20,000 |
| Project net gain | 80,000 − 20,000 | 60,000 |
| Other company net income | Remaining operations, after tax | 240,000 |
| Company net income | 60,000 + 240,000 | 300,000 |
The equity schedule contains these rows. There are no distributions or other equity movements.
| Equity-rollforward row | Calculation | Amount (USD) |
|---|---|---|
| Opening shareholders' equity | Supplied opening balance | 1,800,000 |
| Company net income | From the income bridge | 300,000 |
| New cash equity contribution | Supplied ownership schedule | 100,000 |
| Closing shareholders' equity | 1,800,000 + 300,000 + 100,000 | 2,200,000 |
| Average equity | (1,800,000 + 2,200,000) / 2 | 2,000,000 |
Compute the returns from those same workbook rows:
| Measure | Calculation | Return |
|---|---|---|
| Company ROE | 300,000 / 2,000,000 × 100% | 15.0% |
| Project ROI on launch investment | 60,000 / 200,000 × 100% | 30.0% |
Dollar figures are exact; percentages are shown to one decimal place. The project earns $60,000 after its launch cost, ongoing expenses, and allocated tax. The company earns $300,000 across all operations. Neither the project gain nor the launch investment represents the whole company.
First, prove the project numerator: $400,000 − $120,000 − $200,000 − $20,000 = $60,000. Then prove the company numerator: $60,000 + $240,000 = $300,000. The project contributes to company net income once.
Next, prove the equity movement: opening equity plus earnings plus new owner contributions equals closing equity. The $100,000 contribution increases the equity base; it is not sales or profit. The launch cost is included in project expenses and the ROI denominator, but it must not be subtracted again from the already-net $60,000 numerator.
The two returns can now sit in the same management report with clear labels. ROE summarizes company earnings on equity. Project ROI evaluates a particular launch decision. Calling the difference between them a performance shortfall would ignore their different scopes.
Use ROE to review company results alongside the equity movements, capital structure, and operating performance that produced them. A changing denominator can move the ratio even when the underlying business has not improved. Negative or very small equity also makes an apparently impressive percentage hard to interpret.
Use project ROI to review an identified spending decision against its own approved assumptions. Compare projects only after aligning cost coverage, tax treatment, and measurement periods. A launch-spending denominator like the one above should not be ranked directly against another team's total-cost denominator.
For advertising questions, marketing ROI vs ROAS owns the campaign calculation. For the corporate question of whether equity returns compensate for the required return, see ROE vs cost of equity.
Bring a company income statement, equity schedule, and project benefit-and-cost workbook to Covirage with each return's scope stated. Covirage maps the columns, its tools compute and check the figures, and the external AI model explains the differences with every figure traced to its rows. Create a free Covirage account and bring a sample of your own data; creating the account takes about a minute.
See Covirage for finance teams for the reporting context.
In the broad sense, ROE is an investment return measure. In company reporting, however, its equity denominator and net-income numerator are specific. A project ROI may use total project spending and incremental net gain, so the two percentages are not interchangeable.
A smaller equity denominator can increase ROE without stronger operating performance. Repurchases, distributions, losses, and financing changes can affect equity. Review the equity rollforward and changes in earnings together before attributing a rising return to better operations.
Choose the denominator that matches the question and label it. A project comparison often uses its defined investment cost regardless of funding source. A return specifically on owners' capital uses equity. Never change the denominator silently between projects or periods.
Yes. One successful project may be small relative to the whole company. Other operations can lose money or require substantial equity. Compare the project's dollar contribution with company net income and capital before expecting a project return to explain the company result.