The ROI for birth control is an astounding 114,266%. Compare this to what our condom investment of 5.98 would have returned if we instead invested it in the stock market. At an 8% annualized return (what most experts expect from the market), our 5.98 would turn into Let’s say you’re a twenty-something with money to invest. Maybe you just started your first real job. Of course you’ll want to fund your 401(k), especially if there’s an employer match. ...,095.13 in 18 years. That’s a ROI of 270%.