Sustainable growth is the growth a company can grow at given its profitability and reinvestment decisions without taking on additional debt. The equation for sustainable growth = Retention ratio* Return on Equity. And since the retention ratio is equal to 1- Payout ratio, sustainable growth is also = (1- Payout ratio) * Return on Equity. We understand what the sustainable growth rate is and its formula.
Can I use the sustainable growth rate as my company’s revenue growth rate in the DCF valuation model?