Pre-approval requires the lender to pull the credit information (see Step 1) and assess your financial situation. The lender will then give you a letter that states the amount they would be willing to lend you. If you get in a multiple-offer scenario, being pre-approved may give you an edge because the seller will have more confidence that you will be approved for a loan large enough to purchase their home.
However, the devil is in the details. You have to pay back your 401k loans, with interest – typically at 2% above the prime rate. On larger loans, that means several years’ worth of three-figure monthly payments and several thousand in interest charges. Plus, if you take out a 401k loan before applying for a mortgage loan, your credit utilization ratio will spike, which could raise your mortgage loan’s interest rate or cause the bank to think twice about lending to you in the first place.