This question is mostly part of the financial underwriting process. Meaning insurance companies will look at your financial worth when deciding how much coverage you will be allowed to buy.
Here’s a simple way to figure out how much coverage you can get:
Up to age 40: You can buy 35 times your yearly income.
41–50: You can buy 25 times your yearly income.
51–60: You can buy 20 times your yearly income.
61–70: You can buy 10 times your yearly income.
71–80: You can buy 5 times your yearly income.