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What’s the difference between a Freddie Mac Fixed Rate Mortgage and a Fannie Mae Fixed Rate Mortgage?

For most borrowers, there’s very little difference between a Freddie Mac Fixed Rate Mortgage and a Fannie Mae Fixed Rate Mortgage. Both are government-sponsored enterprises (GSEs) that purchase loans from lenders like PDCU, and both offer conforming fixed-rate loans with similar terms, credit requirements, and down payment options.

The biggest difference is behind the scenes: Freddie Mac loans are typically underwritten using Loan Product Advisor®, while Fannie Mae loans use Desktop Underwriter®. Some of the qualification guidelines—such as how income or co-borrowers are evaluated—may vary slightly between the two systems. In many cases, lenders will run your application through both and choose the one that offers the best approval path.

Both options can help you secure a stable, fixed-rate mortgage with predictable monthly payments—and your lender will help match you with the right one based on your financial profile.