The chart below provides some straightforward benchmarks to get you thinking about how much you might need to save for retirement depending on your age. It considers your desired annual spending after you retire, and the amount you'd need to maintain that lifestyle.
Suppose you are a 40-year-old earning $100,000 a year. Assuming you save 9% of your salary every year, your savings grow at 10% each year on average, and you account for a 2% annual inflation rate, you would need to have approximately $288,691 in savings today to retire at 65 while sustaining your current lifestyle.
The table, below, illustrates the estimated retirement savings one would need to accumulate at various ages to sustain an average annual salary of $50K, $100K, $150K, or $200K during retirement.
Projected retirement savings by age and annual salary