Closing costs vary by lender. In addition, many of the fees associated with closing costs are negotiable such as credit checks, application fees, title searches, broker fees, appraisals, and other processing fees. One of the largest closing costs is likely to be the origination fee, which is typically 1 percent of the mortgage. You may also pay 1- 3% in up-front interest. If you put less than 20 percent down, you will also need private mortgage insurance, which includes a one-time fee of up to 1% plus a specific dollar amount that is included in your monthly mortgage payment.