Unfortunately, filing for a green card is not always cheap. Filing your application will cost $420. In addition to the initial cost of filing, you will also have other fees that may be associated with your immigration and affidavit of support. Other costs you may want to budget include translation services, medical exams, original document replacements, legal fees, and travel expenses. Some supplemental forms may cost as much as $1,000 to file. Consider budgeting the cost of applying for a green card before filing the initial application to expedite the process.