As of October 2014, Bill Gates makes $17,123.29 per minute. The methodology follows an annual net worth increase of $9 billion from 2013 to 2014, which is divided by 525,600 minutes per year.
Despite retiring from Microsoft, Gates makes billions of dollars through his investment firm Cascade. Gates still owns stock in Microsoft, and he controls investments in the Canadian National Railway, Republic Services and John Deere.
Overall, Gates is worth $81 billion per estimates from Forbes magazine in October 2014. The Bill & Melinda Gates Foundation has donated more than $30 billion since 2000, a figure that by itself would make up the 16th-largest fortune in the United States.