Even an extra $100 per month invested in a retirement account can equal a six-figure payout when you are ready to retire. 

CNBC crunched the numbers and we can tell you how much investing an extra $100 a month now will equal when you are ready to retire. 

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Just a few things to remember: These numbers assume you put the money in a retirement account, will get a 4% return on your investments and will retire at age 67.

Check out this video for a full breakdown of how much your savings will grow over time. 

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Disclosure: NBCUniversal and Comcast Ventures are investors in Acorns.

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