You can do the math and convert it as a loan equivalent. If you get a loan for a car, you're paying the value of the vehicle + an extra fee for the convenience of not having the full amount upfront to purchase it. When you lease a car, you're doing the exact same thing. The only difference is that the car company is not legally obligated to disclose your effective interest rate. You can calculate it yourself here:

https://www.calculator.net/lease-calculator.html?ctype=fixpa...

A $20,000 car leased over three years for $400 a month that depreciates to $10,000 at the end of the term has an effective interest rate of 9.539%

The effective interest rate is the difference in the actual depreciation of the vehicle and what your buy out price is at the end of the lease. The dealer has the ability to set the price at the end so they can manipulate how much over true depreciation you're spending.