To determine the income needed to sponsor a family member, you will need first to determine the size of your household, which includes yourself, your spouse (if you are married), and any dependents you have.
Then, your income will need to be 125% of the poverty guidelines. For example, if the federal poverty level for a family of four is $27,750 (in 2022), your income must be $34,687. The amount will vary based on your family size, location, and whether or not you’re in the military.  This is why Form I-864P is important for completing your Affidavit of Support.
It’s important to note that the requirements differ for sponsors on active duty in the U.S. armed forces who petition for their spouse or child. For these cases, the sponsor’s income must be at least 100% of the poverty guidelines.