NEVER pay to complete the FAFSA; the FAFSA is always free. As a matter of fact, that’s what the first F stands for:
Free Application for Federal Student Aid.
If you plan to submit the form online, be sure to file at FAFSA.gov, and avoid sites like FAFSA.com that offer to file the FAFSA for a hefty fee. Always check for the “.gov” to make sure you’re in the right place!