How much you can borrow for a mortgage depends on the limits for the type of loan you're getting, your lender's limits, and your financial situation: your credit, your income, and the amount of cash you have available for a down payment. For a conforming mortgage (the type most people get, backed by the government-sponsored enterprises Fannie Mae or Freddie Mac instead of a government agency), a 20% down payment allows you to avoid paying mortgage insurance. On a $400,000 home, a 20% down payment would mean you need $80,000 up front. You can potentially get a conforming mortgage with a down payment as low as 3%.  Note that this calculation may be different if you qualify for a different type of mortgage like an FHA or VA loan, which require down payments of at least 3.5%, or if you're looking for a "jumbo loan" over $647,200 in most parts of the US in 2022 (excepting Alaska, Hawaii, Guam, and the US Virgin Islands). You don't have to go with the first bank to offer you a mortgage. Like anything else, different servicers offer different fees, closing costs, and products, so you'll want to get a few estimates before deciding where to get your mortgage.