InvestingSaving MoneySavings

This Simple Concept Changed My Mind About Saving Money

How to turn $0.01 into $10 million with compound interest

What would you say if I told you that $0.01 could turn into over $10 million in just one month?  Would you think I was crazy?  Would you think I was terrible at math? Well, before you head over to the “x” button in your browser, hear me out. I’m not lying at all. I’m going to show you what simple concept has changed my mind about saving and investing my money. I’m going to show you what compound interest is all about. Some have called it the eighth wonder of the world. I would consider it as well after doing the simple math around it. Compound interest really does rock my socks off!

Turn $0.01 into $10 Million!

When I first heard about turning $0.01 into over $10 million in just one month, I thought it was crazy. My head was spinning just trying to figure it out. The math didn’t work in my head. Now, I heard about this trick a long time ago, but never talked about it on this site. I’ve spoken about compound interest before, which is why investing and saving is so worth while. It’s really the only way I will be able to retire. It’s the only way for most people. Compound interest is helping me retire people!

Would you take $1,000 per day for a month or $0.01 doubled every day for a month? Click To Tweet

It wasn’t until I actually put this little math conundrum down on paper (OK, it was Excel) that I truly see how it works.  Here is the background. If you could double $0.01 every day for one month, what would you get?  You’re probably thinking just like me and saying “not much!”  It’s hard to comprehend this little equation. I noticed another site some time ago ask if you would rather take $1,000 each day for one month or double $0.01 everyday for one month. Most people would take the $1,000 per day!  That sounds like a lot of money and it is for most. At the end of one month, you would have $31,000!  That’s not pocket change!!  Want to guess what you would have if you double $0.01 everyday for one month?  Let me break it down…

example of compound interest


Do you see that up there?  Yes, $10.7 million when you take $0.01 and double it everyday for a month. Wow, that’s the real power of compounding interest. This is the same thing that powers investments and savings in general.  Now, let me speak some truth first. This little math trick is to just show you the real power behind compound interest. You won’t find any investment or savings account that provides you with 100% returns. That would be unrealistic and you shouldn’t focus on that. It just won’t happen!

Related: Start investing today with Betterment for as low as $25!

I show you this because I know and speak with people regularly who don’t understand compound interest. They don’t think investing is for them or don’t have time to start. I get a little cringe in my neck every time I hear it. I get that cringe because I used to be that way. “I’ll save tomorrow” was a statement that came out of my mouth on a regular basis. The same thing goes with investing. I didn’t know how to do it and it sounded like something only the one percent could do. Well, I was wrong folks. I was way wrong!

Let’s Check Out Some Real Numbers

OK, I know the math up there looks great and you might be irritated that this isn’t some get rich quick scheme. As noted, I put this together to show you how compound interest really works. It’s how investments gain value over time and how people can retire with money in the bank.

To show you some real numbers might make this a little more real for you. Let’s start with $100. You can start a Betterment account for $100 (actually less) and start investing with a long-term strategy in minutes. You could also try Wealthfront, where you’ll have no fee for up to $15,000 when you use my link.

If you were to invest starting with $100 and you contribute $100 to your investment account per month, how much do you think you’d have after 20 years? Seems like a long time, doesn’t it? Remember, investing and compound interest work best over the long run, so it’s not a short-term game to play.

What if I told you, with those numbers, you’d have saved $57,732 by just starting with $100 and adding $1,200 per year. That is very doable for most people.

Compound interest graph

The graph gives you a little visual break down on how this works, but the 8% rate of return is very doable. In fact, over the last 30 years, the S&P 500 has averaged a 10.7% return. Yes there are ups and downs, but that’s why we invest for the long run. So, when people say you can’t get 8% returns, it’s just not true. Tell them to look at historical averages of what has already happened.

Compound interest amortization

Here is the amortization break down for you for each year and how much interest you receive. As your balance increases, so does the interest you earn.

Not bad for just $100 starting out and $1,200 per year. Who wouldn’t want to earn $33,632 in interest over 20 years? Without compound interest, many of your saved money will do nothing. If you don’t invest it, it won’t go anywhere and it won’t beat inflation. Just remember that.

What if we bumped up the monthly contribution to just $150? How will that change the equation?

Updated compound interest graph

And just like that, with an extra $50 per month ($600 per year), you could have over $86,000 in your account with the same rate of return and only starting with $100. That’s quite a nice leap there. In this equation, you’re earning over $50,000 in interest alone. I’ll take that any day!

You can try this calculator as well…

Simple Savings Calculator

The simple savings calculator calculates future savings from investments.

Powered by Student Loan Hero

Everyone Should Save and Invest

I say this because I mean it. I think everyone should save and invest. It doesn’t matter how much money you make, there is always a little something you can put aside. Don’t think so?  Well, take a deep look into your expenses as you might be over paying for a service or buying stuff you don’t actually need. Too many people live paycheck to paycheck and don’t know how to get out. You get out with will power, smart money management, and using the power of compound interest to your advantage. Help your money make money for you. That’s what everyone should do!

Related: I manage all my finances with a free Personal Capital account. It’s the best thing since sliced bread!

If you still think you can’t save, then try the service called Digit. This free service will analyze your spending and pull money into a savings account based on said spending. It’s pretty cool and changed the way I save money. While you don’t earn any interest with it, it will show you how to start saving. If you do use it, you can then transfer money you start saving into an investment account or an interest-bearing savings account. They have started a new “Digit Plus” account, which is still free, but gives you a bonus ($0.05 per $100) for money you keep in your account for three months.

I recommend Betterment for beginner investors and Capital One 360 for savings. If you’re more advanced, then check out TradeKing, Scottrade, or even Motif Investing (based on themes/industries) or these other great online brokerages, who have low fees!

While you can’t expect earning a hot 100% return, investing is how I’m charging ahead toward retirement. The S&P 500 has averaged around 8% annual return for the last 30 years. While there are some ups and downs (that’s normal), the average return is 8%. You can’t get that in a savings account. It won’t happen these days. If you never started investing, then you can learn more here. I would recommend starting with a retirement account, such as a Roth IRA. Retirement is important and investing is how you get there! Just imagine earning 8% on your money every year for the next 30 years. That can be empowering! That’s compound interest my friends!

Well, there you have it. That’s how you can turn one penny into over $10 million in a month. It’s the power of compound interest and I love it! Sometimes it’s hard to comprehend something we don’t truly understand. Most people, including myself would say this is impossible and it doesn’t work, but the Excel sheet up there says otherwise. I wasn’t a believer for a long time. I didn’t really care about anything but my bank account balance. I was foolish and shortsighted. I didn’t long term. I was just focused on now. I’m lucky enough to have figured it out in my twenties. Others may not be so lucky, but it’s never too late to start stashing away money for retirement. Trust me, it’s never too late!


What do you think about this little math problem? Did you think it was possible?

Grayson Bell

Grayson Bell

I'm a business owner, blogger, father, and husband. I used credit cards too much and found myself in over $50,000 in debt. I paid it off, started this blog, and my financial life has changed. I now talk about fighting debt and growing wealth here. I run a blog management company, along with another blog. It is Empowered Shopper, which helps people get information about products they want to buy. You can also check out Eyes on the Dollar, which is a great blog that I co-own.


  1. March 16, 2015 at 9:45 am — Reply

    If only we could receive a 100% return on our money! Our money is not likely to double every day, but at 8%, we can be sure it will double every 9 years. (using the rule of 72). Starting at age 18 with $1,000 and doing nothing else, you can expect to have $2,000 by 27, $4,000 by 36, $8,000 by 45, $16,000 by 54 and $32,000 by age 63. Think about it, just put that $1,000 aside 18 year olds and you don’t touch it and you will have quite a sum when you need it most.

    • March 18, 2015 at 9:17 am — Reply

      I wish we could! You’re right though. Just look at what $1,000 can do just with compound interest.

    • jennifer rodriguez
      November 12, 2015 at 5:01 pm — Reply

      What bank or account can i get in order to get 8%

      • November 12, 2015 at 6:00 pm — Reply

        There is no bank account that can get you 8%. This post is about investing and using compound interest. If you want to earn 8%, you need to invest your money. Try a company called Betterment for starters. 8% is NOT guaranteed. You can also lose money.

  2. Dan M
    March 16, 2015 at 9:51 am — Reply

    Had I not read this article and had someone ask me the question of which I’d prefer, I absolutely would have taken the $1,000 / day option! I’ve always understood the idea of compounding interest (thanks grandma!) but seeing it in that kind of form is incredibly enlightening. Hopefully those who don’t understand the idea of compound interest or who haven’t starting investing/saving see this and get to it! Thanks Grayson!

    • March 18, 2015 at 9:18 am — Reply

      I was the same way. You can easily see $1,000 per day, but the $0.01 doesn’t really do much in our minds. It wasn’t until I popped this into a spreadsheet that is really blew my mind.

  3. March 16, 2015 at 4:14 pm — Reply

    I asked my mom about this one day and she picked the $1,000/day until I explained it to her. Then she quickly changed her mind, haha.

    • March 18, 2015 at 9:20 am — Reply

      Yeah, $31,000 compared to $10 million is a no-brainer!

  4. March 16, 2015 at 11:10 pm — Reply

    Things like that never make sense to me until I see it written down. It’s hard to think about compound interest and how well it works, but numbers don’t lie.

    • March 18, 2015 at 9:20 am — Reply

      I agree Kim. It blows my mind once I see it.

  5. March 16, 2015 at 11:15 pm — Reply

    I hadn’t heard that line about compound interest being the 8th wonder of the world, but I love it! Seeing the figures about the value of compounding makes me glad that we’re working so hard to save in our 30’s, but makes me wish that we had worked harder to invest in our early 20’s!

    • March 18, 2015 at 9:20 am — Reply

      I heard it some time ago and I believe it now! I wish I had saved more in my 20’s, but am doing my best now.

  6. March 23, 2015 at 12:12 am — Reply

    Hey Grayson,

    Thanks for spreading the Digit love!

    This brings up an oldie but goodie of mine


  7. June 29, 2015 at 3:31 pm — Reply

    Given the two options, without understanding the power of compound interest, I would have thought $1k/day would have been a better deal. My little bacon brain finds it difficult to project the earnings of compound interest. Thirty years of investing, saving and growing money in retirement can feel distant. Its great to be reminded that adding time to your money can really make your money sizzle.

    • June 29, 2015 at 3:42 pm — Reply

      I was the same way. Seeing $1k a day would be awesome, but it doesn’t compare to the other option. We love to see large numbers, but can’t project them ourselves.

  8. ma ja
    July 1, 2015 at 12:51 pm — Reply

    i would take 1k$ a day for sure if i dont get 100% profit of the 0.01$ double a day , because there is no point in that , people who live the safe mode would say i’ll go for the double 0.01 and for 30 years or more i’ll be at 60’s 70’s of my age and i would have a good money for my age , but whats the point of having such money if you are on the edge of death , doesnt worth , its remind me of a story someone told me about a guy who spend more than 50 years of his life buying lottery tickets , when he came to age of 80’s he won the lottery , the first thing he did in public he tear it apart .
    money without time doesnt worth a thing , but both together is a success for example , days ago i came a cross a video showing David Choe a graffiti guy , and i’m an artist by my self i always wonder how i could make a living and having my own studio and time and money i could work without fear of tomorrow , and i’m asking my self how this guy make a living , and when i read articles suddenly its like ohhh he got one shot of chance and he used it 200million$ worth of shares took about 5 years only , and i’m questioning my self how that doubled it self in this short period 5 years and how much percentage of profit we are talking about ? , if i look at compound interest we dont get 100% but we may get 2% where the rest go ? to whom? how can i increase the percentage to 80% – 90% , lets be logic i have to give some in return thats why not logic to have 100% , and i’m sure those shares that become 200million $ in a 5 years they have doubled in a system way which not explained not revealed , we could know how basically compound interest work as the way you explained but if thats it ?no farther ? not getting deep into things that shows why i cant get a huge profit of it and someone tells me dont even think about having the 100% or even the 80% of it , its realy pointless and very disturbing

    • July 1, 2015 at 1:40 pm — Reply

      This is a completely theoretical calculation. I think you’re looking too deep into this post. The point of the post was to make sure you understand the concepts of compound interest. Yes, you won’t find something that gives you 100% return, but that doesn’t mean you can’t find 10% or more. You’re digging for something that doesn’t exist in this post. This is showing people who are reluctant to save/invest to do so. That’s how you can grow your money. 5% return is more than zero.

  9. jennifer rodriguez
    November 12, 2015 at 5:04 pm — Reply

    But don’t you still need to have that 10 mil in order to achieve that goal how are gonna be getting all that money

    • November 12, 2015 at 6:00 pm — Reply

      The post is showing you how compound interest works.

  10. DG
    November 13, 2015 at 11:39 pm — Reply

    Sadly this would most likely only happen if it was Daily Compounding.

    However, most of the time, you can only get either quarterly or annual compounding which doesn’t add up to much.

    But if you could do Daily Compounding, it would definitely be nice. I have no clue where you could do it though.

    If you could find multiple places that you could get daily compounding at, could you let me know?

    • November 13, 2015 at 11:54 pm — Reply

      This is just a theoretical scenario. If you’d ask someone which they would take, they wouldn’t take the compounding, they would take the straight cash. It’s more quantifiable and they can do the math. This is just to show you what compounding does and why investing should be a part of your savings strategy.

      • DG
        November 14, 2015 at 12:03 am — Reply

        I’d do the compounding if I could find daily compounding.

        Other than that, I’d take the straight cash as quarterly and annual compounding don’t make much difference compared to daily compounding.

        But it is a nice theoretical scenario.

        • November 14, 2015 at 12:38 am — Reply

          Well, I’d doubt you’d get either scenario. I’d take $1,000 a day too if I couldn’t find a place to compound daily.

  11. Lisa Fermin
    November 16, 2015 at 5:23 pm — Reply

    Tell me Grayson, are you a millionaire? You give the advice but why aren’t you doing it yourself?

    • November 16, 2015 at 5:49 pm — Reply

      Lisa, did you read the post? Did you understand the concept I was telling you about? This has nothing to do with being a millionaire. This has to do with the basic principles of math and how investing and saving will get you to become a millionaire. No, I’m no millionaire, but I am doing this exact thing. Anyone who puts money into an interest bearing account or invests is doing it. This is for the people who think investing is stupid or they don’t have any money to save. This is to show the true power of compound interest. Please don’t put up a comment like this without reading the full post and understanding what it’s talking about. This post is showing people why they should invest and save their money.

  12. November 17, 2015 at 6:57 pm — Reply

    Saving money is a great start, but at these low interest rates won’t help you too much. I sometimes cringe when I see a friend or family member put a few grand in a CD. All that money locked up for 6-months, a year, and you are only getting a 1% return? I guess it’s better than no interest!

    I always recommend investing to friends and family. You don’t have to go crazy and try to find the next best thing, but it’s one of the best ways to grow your wealth. Most online brokers’ fees are relatively cheap these days. Plus, if you don’t have the time to research stocks, you can always get a decent return with an index fund.

    When I find that 100% daily return, I stop by and share it here!

    • November 17, 2015 at 11:04 pm — Reply

      Yeah, I recommend investing as well. The saving part is for those who don’t save any money at all. I wouldn’t recommend anyone put everything they have in an investment account. Need to keep some close and safe from market dips.

      • Robert @ Frugal Buzz
        November 17, 2015 at 11:49 pm — Reply

        Absolutely. Always have cash ready for dips in the markets.

  13. Chloe
    December 20, 2015 at 8:40 pm — Reply

    So basically the point of this post was to lure people with a headline that is theoretically improbable (at best) and earn some money on pay-per-click basis (which is probably WAYYYYY more lucrative than investing for the average joe). Nice try. 8% is realistic and it blows by the way. Couple that with the perpetually unstable market and there’s a decent chance you’ll lose $ too. I understand you wanted to “explain how compound interest works” but it could’ve been done without baiting people with a 100% return scenario that’s totally impossible. Most people won’t even approach 1/4 of that. Be for real.

    • December 20, 2015 at 9:12 pm — Reply

      You seem to know how it all works Chloe. Let’s break down some math since 8% returns blows so much. If I have $10,000 invested and I add only $1,200 per year ($100 per month), with an 8% return and over 25 years, I now have $163,000. That really blows doesn’t it. But since you believe my only motive here it to earn some money over pay per click advertising, let’s break that down for you as well. I earn about $2.30 per day from this post alone. If it’s consistent (which PPC clicks are certainly not), then I would earn an awesome $839.50 per year. Put that over the same amount of years (25), and I’ve earned a sweet $20,987.50.

      I don’t know about you, but I would take compounding at 8% any day over PPC advertising. There is a reason why the wealthy invest. The people I talk to on a regular basis don’t even know why they should save. This is an excellent reason to show them. This isn’t about baiting anyone. This questions people understanding of the concept. Most people would take the $1,000 per day as it seems larger instead of the paltry $0.01 compounded daily. It’s the exact same concept going on in your savings account or investment account.

      Again, no where in the article did I say this can happen to you. I even note the 8% average over the last 30 years. Yes, I’m losing money right now in the market, but it will go back up. We all lost money in 2008, but I kept in and gained it all back plus a lot more. That’s how the market works.

      So, before you try to comment on my intent with something, please think really hard about what you’re going to say. Unless you have all the facts and know what I do, then don’t accuse me of doing anything. Obviously, my math shows for itself.

  14. May
    December 26, 2015 at 2:22 pm — Reply

    Well, you are not really doubling $.01 every day…
    you only double $.01 the 2nd day…
    after that, you are doubling the previous day,
    not the $.01

    • December 27, 2015 at 3:08 pm — Reply

      Actually, that’s how doubling works. When you double something on a consecutive basis, you double the previous amount and do on. I didn’t say add $0.01 per day for 30 days, I said double.

  15. Fred Johnson
    January 1, 2016 at 10:08 am — Reply

    I think the most important point about this article that should be brought up is not to use BETTERMENT! It is not a good investing platform for the average user the returns are well below average and a lot of people are seeing negative returns with the platform. I would not wish betterment on my enemies it is a garbag investment strategy there are many better and simpler sites to use.

    • January 1, 2016 at 11:35 am — Reply

      I think that is a little harsh. I’ve used the platform for nearly four years and have a great return. 8% average between two different accounts and 12.4% in my IRA. The platform works and they handle billions in assets. I know well over 300 people who use it and love the platform. Sorry you didn’t like it, but just because you had a bad experience with it doesn’t mean it’s not good for average investors. That’s actually what the platform is built for. Maybe your risk tolerance isn’t right. Maybe you’re holding too much in bonds (bad idea right now). If you just started investing with Betterment, you will see a negative return as that’s how the market is right now. Remember, investing is a long-term game and my account shows that it works.

      I also don’t know how it could be any simpler than Betterment. You add money, set your tolerance, and you’re done. That is as easy as it gets. I’ve used well over 20 different investment platforms for research on this site and none are easier.

  16. January 5, 2016 at 8:40 am — Reply

    It’s eye-opening when you learn about compound interest. I am teaching my daughters about it at the moment. They are young so don’t quite grasp it however, never too early to learn!

    My boyfriend and I were discussing it tonight and how it impacts long term. Most don’t think about it much.

    • January 11, 2016 at 7:55 am — Reply

      Compound interest is huge. Most people don’t think it’s real, but it very much is.

  17. Jaco
    January 19, 2016 at 3:40 am — Reply

    I would much rather take that $100.00 and convert it back to my own currency @ 1-15 current exchange account, then invest it into an edge 28 fund regulated by government as a retirement annuity, 1500 a month at 28% return (compound interest) fixed at retirement age 60. It’s also tax deductable.

    • January 19, 2016 at 10:14 am — Reply

      That’s an interesting way to do it. Something I didn’t consider with this one, but that wasn’t the point of the post. If you can do that with the money, then do it!

  18. Ken
    January 25, 2016 at 3:50 am — Reply

    I recall many years ago an example of compound interest involving two people of the same age. One saved $2000 (at the time the IRA limit) a year starting at age 20 and stopped at age 30. The second started saving $2000 a year at age 30 and did not stop. By the time they reached age 65 the first person who only saved $10000 out of pocket had a slightly larger nest egg. I’m not skilled at spread sheets or math to verify this, but if true is remarkable.

    • January 25, 2016 at 11:17 am — Reply

      Yeah, the one who started 10 years earlier would have a longer period of compound interest to run up against. That’s how it works. The longer you can hold it, the better. They would have saved $20,000 since it was $2k per year for 10 years.

  19. Emily
    March 29, 2016 at 9:54 pm — Reply

    But what happens if the market is way down when it’s time for you to retire??

    We keep putting money in Iras and they keep losing money!

    So it makes me feel like maybe it’s better to save but not invest.

    And how often is interest compounded in reality?

    • March 29, 2016 at 11:31 pm — Reply

      I’m not losing money. I’ve invested through the Great Recession and I’m still at a positive. It’s still beating my savings account of 0.75%. Money is compounded differently depending on the account. Many are yearly, but if you don’t retire for 30 years, then you have quite a bit of earning to do. The truth is the market has returned on average, 8% over the past thirty years. This is through a few recessions. There are ups and downs. When you get close to retirement, you need to be cognizant of your investing strategy. I don’t throw everything into investments, I also have money sitting in savings account, but that won’t allow you to grow your net worth. That is just protection money, but you surely won’t be able to retire off of savings account earnings.

  20. May 16, 2016 at 11:39 am — Reply

    I’ve always loved the penny question. Compound interest is one of the amazing wonders of the world!

Leave a reply

Your email address will not be published. Required fields are marked *