There is a lot of advice on , but one of the most important tips is to start investing as early as possible. Twentysomethings are usually divvying up their modest paychecks to pay rent and student loans bills, build an emergency fund and still have a social life.

But, says financial advisor Brian Stivers, they shouldn’t put investing on the back burner.

CNBC Select asked Stivers, founder of Stivers Financial Services, to help calculate how much money a 25-year-old would need to invest each month to earn $1 million.

“When it comes to investing, there are three very important components,” Stivers said. “The amount you contribute monthly, your rate of return and how long you have to save.”

When crunching the numbers, he accounted for three…