By May 15 of each year, congressional members, key staffers and top officials in the executive branch must file forms covering the preceding calendar year that detail their personal finances. By law, they must list their assets and liabilities, their income (excluding their government salaries), asset transactions, gifts they received and more. Although the 2012 STOCK Act now requires all mortgages to be listed, property values need not be listed unless they produce income, meaning primary residences are generally not listed as assets. They must include the source of their spouse's income, but need not report the amount.
Why should Americans care about the personal finances of their federal lawmakers? There are several key reasons:
Personal financial disclosure reports tell you a lot, but not everything. For example, lawmakers are only required to disclose their assets in broad ranges, meaning a truly accurate snapshot of a lawmaker's wealth is difficult to ascertain. Contact your member of Congress and let your voice be heard if you don't consider this level of disclosure adequate. But Congress did pass legislation to address concerns that lawmakers might trade on non-public information that was conveyed to them in the course of their work. The STOCK Act was signed into law in April, 2012. Read more about the STOCK Act here.
https://www.opensecrets.org/personal-finances/why-this-matters