What it means
A company that earns a profit has two choices for each dollar: return it to the owners or keep it to fund growth. The plowback ratio measures how the company splits the decision.
Young, fast-growing companies typically plow back everything, because they have more profitable projects than cash and shareholders prefer capital gains to dividends. Mature companies with fewer growth opportunities pay out more.
Utilities and consumer staples often retain only 30% to 50%; technology companies in their growth phase often retain 100%. The ratio matters because retained profit is the cheapest capital a company has.
It requires no issue costs, no negotiation with lenders and no dilution of existing shareholders. The sustainable growth rate, the rate at which a company can grow its sales and assets while keeping its financial structure constant, is the plowback ratio multiplied by the return on equity.
A company earning 15% on equity and retaining 60% of its profit can grow at about 9% a year from its own resources; to grow faster it must borrow more or issue shares. Whether a high plowback ratio is good depends on what the retained money earns.
If the company reinvests at a return above its cost of equity, retention creates value and shareholders are better off than if they had received the cash. If it reinvests at a lower return, retention destroys value: the shareholders would have done better with a dividend they could invest elsewhere.
Investors therefore read the plowback ratio alongside return on equity and return on incremental capital, and they are wary of companies that retain heavily while earning poor returns, which is often a sign of empire-building. The ratio can also be distorted.
Share buybacks return cash to shareholders without appearing as dividends, so a company with a high plowback ratio on paper may be distributing heavily through buybacks. A one-off profit or loss changes the ratio without changing the dividend policy.
Analysts usually look at the ratio over several years and include buybacks in the payout when judging it.
In practice
Real-world examples.
Example
A software company retains 100% of profit for a decade, funding product development and acquisitions, then begins paying a dividend once growth slows and cash accumulates.
Example
A regulated water utility retains about 40% of profit, enough to fund its mandated investment programme, and pays out the rest because regulators cap its returns.
Example
A family business retains 80% of profit to fund a factory expansion, and the owners accept lower dividends for three years in exchange for a larger business afterwards.
Think of it
“Plowback ratio shows what percentage of profits get 'plowed back' into the business rather than paid out.
Formula
Calculation
Plowback Ratio = (Net Profit minus Dividends) / Net Profit = 1 minus Dividend Payout Ratio
Sustainable Growth Rate = Plowback Ratio x Return on Equity
Worked example. A company reports net profit of $50,000,000 and pays dividends of $15,000,000. Its return on equity is 14%.
- Plowback ratio = ($50,000,000 minus $15,000,000) / $50,000,000 = 70%
- Dividend payout ratio = 30%
- Sustainable growth rate = 70% x 14% = 9.8% a year
If the company also bought back $10,000,000 of shares, total distributions were $25,000,000 and the effective plowback ratio was 50%, giving a sustainable growth rate of 7.0%.
Value test: the company's cost of equity is 10%. Retaining $35,000,000 at a 14% return creates about $1,400,000 of value a year above what shareholders require ($35,000,000 x (14% minus 10%)). If return on equity were 8%, the same retention would fall $700,000 short of the shareholders' required return, and a higher payout would serve them better.
Growth test: the company wants to grow sales 15% a year. With a sustainable growth rate of 9.8%, it needs external funding for the difference. If equity is $357,000,000 and the company wants to keep its debt-to-equity ratio unchanged, growing assets by 15% requires roughly $18,600,000 of additional equity beyond retained profit, meaning a share issue, a lower dividend or a higher debt ratio.Case study
Seen in the real world.
A listed industrial conglomerate had retained 85% of its profits for fifteen years, building a cash pile and acquiring businesses in unrelated sectors. Its return on equity had fallen from 16% to 7% over the period as each acquisition earned less than the last. Shareholders, who had received almost nothing in dividends, pointed out that the company's plowback had funded value destruction: $2 billion retained at 7% when they required 10%.
An activist investor won a seat on the board and pushed through a new policy: payout of 60% of profit, buybacks with surplus cash, and a rule that any acquisition must clear a 12% return hurdle. The company's growth slowed, but its return on equity rose to 11% over three years as low-return businesses were sold, and its share price rose 45%. The board's lesson was that retention is only a virtue when the retained money earns more than its owners could.
Watch out
Common mistakes.
- Reading a high plowback ratio as a sign of investment in growth without checking what the retained money earns.
- Ignoring buybacks. A company can retain little in substance while showing a high plowback ratio on dividends alone.
- Comparing plowback ratios across industries. Utilities and growth companies have different opportunities and appropriately different ratios.
Questions
People also ask.
What is a good plowback ratio?
One that matches the company's opportunities. High is right when the company earns above its cost of capital on new investment; low is right when it does not.
How is the plowback ratio related to the dividend payout ratio?
They sum to 100%. A payout ratio of 40% means a plowback ratio of 60%.
What is the sustainable growth rate?
The growth a company can fund from retained profit without changing its leverage: plowback ratio times return on equity.
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