This was my first foray into passive income.  Putting your money in a high-interest savings account is a great idea because it is safe and usually these are e-savings accounts so that they are a bit more difficult to access (e.g. you won’t be able to raid the ATM and withdraw all your savings to buy that pair of shoes you have been eyeing).  Which means that you’ll have less opportunity to meddle with your money, which means the money will be left untouched and left to grow with compound interest.

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You don’t have to invest individually to take advantage of dividend paying stocks (i.e. investing in an ETF like DVY, which currently has a 3.16% dividend yield – almost 4%). And while your math is indeed correct, there is more to dividend paying stocks that just the math. The reason the companies pay dividends is typically because of their underlying strength, steady growth, etc. These companies can be good investments for the long run. As such, it might not make sense to sell.

The robo-advisor company charges a 0.50% fee and on top of that there the fee charged for the ETFs (which is anywhere from 0.25 to 0.5% as well).  Robo-advisor companies help you rebalance your money automatically so your original asset allocation is preserved.  Basically, you can be completely hands off and all you need to do is funnel your money in there and they will invest it for you.
While these activities fit the popular definition of passive income, they don’t fit the technical definition as outlined by the IRS’s Passive Activity Losses—Real Estate Tax Tips. Passive income, when used as a technical term, is defined as either “net rental income” or “income from a business in which the taxpayer does not materially participate,” and in some cases can include self-charged interest. It goes on to say that passive income “does not include salaries, portfolio, or investment income.”
Wealthsimple is the largest robo-advisor company in Canada, and it has over $1.9 billion assets under management.  It is backed by Power Financial Corporation and was created right here in Canada (Toronto), thanks to the founder and CEO of Wealthsimple, Michael Katchen (who was only 29 years old when he got $37 million in funding from Power Financial to start up Wealthsimple).

Are dividends passive income?

The United States Internal Revenue Service categorizes income as active income, passive income, or portfolio income.[1] It defines passive income as only coming from two sources, or "passive activities": rental activity or "trade or business activities in which you do not materially participate."[2][3] Other financial and government institutions also recognize it as an income obtained as a result of capital growth or in relation to negative gearing. Passive income is usually taxable. 

What means passive income?