Graham Stephan can afford to buy nearly anything he wants: The 29-year-old earns up to $220,000 in a single month and is on track to make a minimum of $1.6 million in 2019.

Still, the YouTube star and real estate investor is careful with his cash. “I’ve always enjoyed the aspect of not spending money, even as a kid,” he tells CNBC Make It, adding, “I end up saving about 99% of my income, just because my income is so high, and I keep my expenses so low.”

Stephan, whose net worth crossed $1 million for the first time at 26, keeps his costs down partly by refusing to spend on two things: “Number one is coffee. I think the markup of coffee at Starbucks and Coffee Bean and a lot of those places out there is absolutely ridiculous, so I just make it at home for 20 cents.”

He buys his coffee at Smart & Final, where he can get a large bag for “like half the price” of other grocery stores, he says.

“I end up saving about 99% of my income, just because my income is so high and I keep my expenses so low.”-Graham Stephan, YouTube millionaire

Secondly, “designer clothing is one of those things that I will never spend money on,” says Stephan. “I just don’t see the point in spending $700 on Gucci shoes when you could go to Aldo or Call It Spring or H&M and get very similar shoes for one, one-hundredth of the price.”

Stephan also saves money by price shopping for groceries at Trader Joe’s, Ralphs and Smart & Final, and when he goes out to eat, he typically splits a meal with his girlfriend.

He doesn’t just focus on the small stuff, though — to save the majority of his income, he finds creative ways to cut back on major expenses, like housing and transportation. He rents out the other half of the duplex he owns so that “it basically works out to be a free place for me to live,” he explains.

He bought a Tesla Model 3, which start at $35,000, in April 2019 — but, in a way, Stephan argues, the car was free. He made a YouTube video about the purchase that ended up going viral, he says, and the video itself “paid for the entirety of the car.”