What it means
Net worth is the residual: what would be left for the owners if every asset were sold at its balance sheet value and every debt repaid. The ratio measures how much annual profit that residual generates, expressed as a percentage.
Owners of private companies reach for it more than any other return measure because it maps directly onto their own position. Someone with $400,000 tied up in a shop wants to know whether that money is earning 4% or 24%, since the alternative is selling up and investing elsewhere.
It is the closest accounting equivalent to an interest rate on the owner's capital. The calculation is net income after tax divided by net worth, usually the average of the opening and closing balances for the year.
Using the closing figure alone can distort the answer badly in any year with a large capital injection or an unusually big dividend. One nuance trips people up constantly: a high return on net worth is not automatically good news.
A company that has paid out most of its reserves as dividends has a small net worth, so even modest profits produce a flattering percentage. The same effect appears when heavy borrowing has shrunk the equity base.
Some analysts strip intangible assets such as goodwill out of the calculation, producing a return on tangible net worth. That version is popular with lenders, who care about what could realistically be recovered rather than about figures created by past acquisitions.
In practice
Real-world examples.
Example
A three-partner architecture practice earns $600,000 after tax on a net worth of $2,000,000, a return of 30%. The partners compare that with the 5% they could earn on deposit and decide to keep reinvesting rather than draw the money out.
Example
A manufacturer borrows $8,000,000 to buy back shares. Net worth falls sharply and return on net worth leaps from 12% to 19%, but the bank covenant test now has far less headroom, so the improvement reflects a change in risk rather than in performance.
Example
A retail group reports net income of $7,000,000 on net worth of $50,000,000, a return of 14%. Its lender excludes $30,000,000 of acquisition goodwill, leaving tangible net worth of $20,000,000 and a return of 35%, which prompts a hard conversation about how thin the tangible equity base has become.
Think of it
“Return on net worth is what shareholders earn on their investment-basically ROE.
Formula
Calculation
Return on net worth = Net income / Net worth
Net worth = Total assets - Total liabilities
A family-owned distribution company reports net income of $1,800,000 for the year. Its balance sheet shows total assets of $18,500,000 and total liabilities of $11,000,000.
Net worth = $18,500,000 - $11,000,000 = $7,500,000.
Return on net worth = $1,800,000 / $7,500,000 = 0.24, or 24%.
If the owners prefer the average balance, and net worth opened the year at $7,100,000 and closed at $7,900,000, the average is ($7,100,000 + $7,900,000) / 2 = $7,500,000, which gives the same 24% in this case.Case study
Seen in the real world.
Ashfield Joinery is a fictional company used here for illustrative purposes. Two brothers had run the business for eighteen years and measured success by the size of the annual profit, which had grown steadily to $900,000.
Their accountant calculated return on net worth for the first time and produced an uncomfortable figure. Net worth had grown to $15,000,000, largely because profits had been retained rather than distributed and a large workshop had been bought outright, so the return was $900,000 / $15,000,000 = 6%. The brothers were earning less on capital worth $15,000,000 than a term deposit would have paid.
In this illustrative case the conclusion was not that the business was bad but that too much money was parked in it. Selling one of the two workshops and returning $6,000,000 to the brothers left net worth at $9,000,000 and profit at $850,000, a return of 9.4%, with the released capital invested elsewhere.
Watch out
Common mistakes.
- Reading a high return on net worth as strong performance when it is really the result of a thin equity base created by borrowing or large distributions.
- Using profit before tax in the numerator, which overstates the return owners actually receive.
- Comparing the ratio with a bank interest rate without allowing for the fact that business profits carry risk and are not guaranteed.
Questions
People also ask.
Is return on net worth the same as return on equity?
In practice yes for most companies; the terms differ mainly by convention, with net worth more common in owner-managed businesses and equity more common in listed company reporting.
What if net worth is negative?
The ratio becomes meaningless and should not be quoted; the real story is that liabilities exceed assets, which is a solvency question rather than a return one.
Should drawings by owner-directors be added back to profit?
For a genuine comparison with an outside investment, yes, add back anything above a market salary, otherwise the return is understated.
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