How this instrument works
The retention ratio measures how much of a company's after-tax profit stays inside the business rather than leaving as a dividend. Subtract dividends paid from net income, divide by net income, and multiply by 100 — the result is the percentage of every profit dollar plowed back into operations, inventory, equipment, or debt reduction instead of being handed to shareholders. A retention ratio of 66.67% means roughly two dollars out of every three earned were kept; the other third went out the door as a cash payment.
Equity analysts rarely stop at the raw percentage. Multiplied by return on equity, the retention ratio becomes the sustainable growth rate — a rough ceiling on how fast a company can expand its equity base using only the profit it generates, without selling new shares or taking on more debt. A software company retaining 90% of a strong return on equity can, in theory, compound its book value quickly; a utility retaining 20% of a modest return grows its equity base far more slowly by the same arithmetic, even though both companies can be perfectly healthy.
The ratio says nothing on its own about whether the retained capital was invested well. A high retention ratio paired with a falling return on equity means profit is going into projects that do not earn much, which eventually shows up as a flat share price even while retained earnings pile up on the balance sheet. The figure is also an accounting measure drawn from net income and declared dividends, not a cash-flow measure — it ignores the capital spending and depreciation figures a reinvestment-rate calculation would net against each other.
- Enter Net income, $ — the company's after-tax profit for the period you're checking, taken straight from the income statement.
- Enter Dividends paid, $ — the total cash dividends declared to shareholders across that same period.
- Read Retention ratio, % — the share of that profit kept inside the business instead of paid out.
- Recalculate across several years to see whether the retention policy is steady or drifting toward a heavier payout.
Worked example — a $150,000 profit year
Take a company reporting $150,000 of net income for the year that declares $50,000 in total dividends. Subtracting 50,000 from 150,000 leaves 100,000, and dividing that by 150,000 and multiplying by 100 gives a retention ratio of 66.6666666667%, or about two-thirds of profit kept in the business.
That two-thirds retention is typical of a company still funding its own growth rather than returning cash to shareholders today. If the same company also reports a 15% return on equity, multiplying 15% by 66.67% gives a sustainable growth rate near 10% — a rough ceiling on how fast it could expand its equity base without issuing new shares or borrowing more, before accounting for any change in the return itself.
Questions
How is the retention ratio different from the payout ratio?
They are exact complements — retention ratio plus payout ratio always equals 100%, since one measures what a company keeps and the other what it hands out. The distinction is in how each number gets used: payout ratio speaks to dividend safety and cash return, while retention ratio typically feeds forward into a growth estimate, multiplied by return on equity to gauge how fast a company can expand using only its own profit.
How does the retention ratio feed into the sustainable growth rate?
Multiply the retention ratio by return on equity and the result is the sustainable growth rate — an estimate of how fast a company's equity, and by extension its revenue, can grow using retained profit alone, with no new debt or share issuance. A 66.67% retention ratio and a 15% return on equity imply roughly a 10% sustainable growth rate; growing faster than that means drawing on external financing rather than internal profit.
Can the retention ratio be negative or above 100%?
Yes. If dividends paid exceed net income for the period, the retention ratio turns negative, meaning the company distributed more cash than it earned and covered the gap from reserves, new borrowing, or asset sales. It can also land above 100% when net income is unusually low or negative while dividends stayed flat; check more than one period before drawing a conclusion, since a single unusual quarter can distort the figure.
Does a high retention ratio always mean strong growth?
No. The ratio only shows how much profit stayed inside the business, not whether that capital was invested well. A company retaining 90% of its earnings while return on equity keeps falling is plowing money into projects that do not earn much, and the share price can stagnate even as retained earnings grow on the balance sheet. The retention ratio and return on equity read together, not separately, explain growth quality.
Is the retention ratio the same as a company's reinvestment rate?
Not quite. The retention ratio is an accounting figure built from net income and dividends declared on the income statement. A reinvestment rate, used in discounted cash flow work, instead nets capital expenditures and working-capital changes against depreciation and cash flow — a different base that can diverge sharply from the retention ratio in capital-intensive or fast-depreciating industries.
Which net income figure belongs in the calculation?
Net income available to common shareholders — after-tax profit with any preferred dividends already subtracted — since preferred dividends are a fixed obligation, not a discretionary distribution to common shareholders. Mixing the two figures overstates how much profit common shareholders actually retain, and makes the retention ratio inconsistent with the return-on-equity figure it is normally paired against.
References
- SEC Investor.gov — Investing Basics Glossary
- NYU Stern School of Business — Aswath Damodaran, Corporate Finance
Read this first: This instrument shows arithmetic, not advice. Real offers add fees, taxes and terms that vary by lender and place — verify the figures against your actual paperwork before deciding anything.