Lesson 4 of 8
Reading a return on assets
Return on assets has no cross-industry level, because asset intensity varies by an order of magnitude, and it quietly punishes a company that grew by buying.
By Javier Sanz
Founder of ValueScreener. Built Ninety Nine, a securities services provider, and sold it to a tier-one global bank; ran operations and internationalization at Alpaca, the brokerage API.
Who writes thisEditorial processLinkedIn (opens in a new tab)X (opens in a new tab)
In one minute
- As commonly published, return on assets divides a return belonging only to shareholders by a capital base funded by shareholders, lenders and other creditors together.
- Adding after-tax interest back to the numerator repairs the mismatch in one line, and shows the same business as identical under two financing arrangements.
- A company that grew by acquisition reports a lower return on assets than an identical one that built the same business, because goodwill inflates the denominator with nothing operational changing.
Return on assets, as commonly published, divides net income by total assets.
Return on assets, as commonly published equals Net income divided by Total assets.
Example112.5 ÷ 1,000.0 = 11.3%
It is not internally consistent: the numerator is what is left after lenders are paid, but the denominator belongs to shareholders and lenders together.
Return on assets, consistent version equals After-tax operating profit divided by Total assets.
Example150.0 ÷ 1,000.0 = 15.0%
Return on assets by sector, US companies
- Technology · 639 companies0.97%
- Financial Services · 778 companies1.18%
- Industrials · 553 companies3.08%
- Utilities · 104 companies2.40%
- Consumer Defensive · 189 companies3.34%
Median, all US companies: 1.03%
The mismatch, and the line that repairs it
The published version reports the same business nearly four points apart, purely because of financing. Adding after-tax interest back reconstructs after-tax operating profit in both columns: 200 of operating income times one minus a 25 percent tax rate is 150.0 either way. Stephen Penman's reformulation, in Financial Statement Analysis and Security Valuation, separates operating from financing activity so operating profitability can be measured without the financing decision inside it; the interest add-back is the one-line version. Carried further, it stops being return on assets and becomes return on invested capital, the next lesson.
Bought, not built
The businesses are the same. One company built it; the other paid 900 for it, recognising a 400 premium as goodwill. Buffett's goodwill appendix in the 1983 shareholder letter separates accounting goodwill, the residue of a purchase price, from economic goodwill, the capacity to earn a high return, which does not appear on a balance sheet unless somebody bought it. If you are asking whether the acquirer's capital was well spent, the acquirer's lower figure is the honest one, because it includes the price paid.
What ASC 842 did to the denominator
Operating leases came onto the balance sheet as a right-of-use asset under ASC 842, effective for fiscal years beginning after 15 December 2018. A lease-heavy company reported a smaller denominator and a higher return on assets in every pre-transition year, then stepped down at adoption because a standard changed where an obligation is recorded. A ten-year series crosses that line for every lease-heavy filer, and it is a candidate accounting event before it is a candidate business event.
Financial companies' one percent, and what it is not
Across the 778 Financial Services companies with a computed return on assets on 2026-09-07, the median was 1.18 percent, against a return on equity median of 9.8 percent across the sector's 681 companies with a computed ROE on the same date. Most of the gap is the balance sheet: a bank or insurer is funded overwhelmingly by deposits or policyholder money, so a thin return on a very large asset base becomes a respectable return on the small slice the shareholders funded. Return on assets is comparable across companies that fund themselves similarly; it is a comparison of funding models everywhere else.
Do it on a real 10-K
- Average total assets across the two balance sheets in Item 8.
- Note goodwill and acquired intangibles separately, and compute the ratio with and without them.
- Build after-tax operating profit as operating income times one minus the effective tax rate, and divide by the averaged denominator.
Check yourself
Why is return on assets, as commonly published, internally inconsistent?
- It uses the wrong tax rate
- The numerator belongs to shareholders alone but the denominator belongs to shareholders and lenders together
- It ignores depreciation
Show the answer
Answer: B.
Adding after-tax interest back to the numerator repairs exactly this mismatch, as the worked example shows.Two identical businesses, one built and one bought for a premium over its net assets. What happens to the acquirer's return on assets?
- It is unaffected
- It is lower, because goodwill inflates the denominator with nothing operational changing
- It is higher, because acquisitions always improve returns
Show the answer
Answer: B.
The premium is recognized as goodwill, which raises total assets while net income stays the same.A sector's return on assets looks much lower than its return on equity. What is the most likely explanation?
- The sector is unprofitable
- The sector is funded mostly by other people's money, such as bank deposits
- The two ratios measure the same thing and should be equal
Show the answer
Answer: B.
High leverage turns a thin return on a large asset base into a larger return on the smaller equity slice shareholders funded.Sources
- Penman, Financial Statement Analysis and Security Valuation, on separating operating from financing activity.
- Berkshire Hathaway shareholder letter, 1983 (goodwill appendix): accounting goodwill against economic goodwill.
- ASC 350, Intangibles, Goodwill and Other, and ASC 842, Leases.
- The return on assets distribution published on the open research pages of ValueScreener, built 2026-09-07.
What this leaves out
- This page prints no band at which return on assets becomes good; asset intensity differs too widely between industries for one to be honest.
- The distribution figures were built 2026-09-07 from filed statements and are rebuilt on a cadence; later readers see different numbers.
- The interest add-back assumes one tax rate applies cleanly; a company with losses carried forward will not reconcile as neatly as the worked example.
- Nothing here is advice about any security.