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METHODOLOGY & REVISIONS

30-Year Fixed Mortgage Rate

Primary source

All values come directly from Freddie Mac via FRED (MORTGAGE30US). We do not modify, smooth, or interpolate published values.

The average interest rate for a 30-year fixed-rate mortgage in the United States, published weekly by Freddie Mac. Determines monthly payments on long-term home loans and typically tracks the 10-year Treasury yield plus a lender spread.

Update schedule

Weekly — we refresh daily; upstream source publishes once per week (check Next Update below).

We gate dateModified updates to actual value changes (threshold: 0.01% absolute or 0.5% relative) to prevent freshness spoofing. If the upstream value hasn't moved, we don't claim we updated the page.

Downloadable data

Full historical series is available as CSV with primary-source attribution:

Download CSVPrimary source →

Licensed CC-BY-4.0. When citing, include both CalcFi and the primary source.

Corrections log

No corrections issued on this series.

Spot an error? Email corrections@calcfi.app. Confirmed errors are fixed within 48 hours and logged here with date and nature of the change.

How to cite

For journalism, research, or educational use, cite both the primary source and CalcFi's canonical URL. Example (APA):

CalcFi. (2026). 30-Year Fixed Mortgage Rate. Retrieved from https://calcfi.app/data/mortgage-rates/30-year-fixed/revisions. Source: Freddie Mac via FRED (MORTGAGE30US).

Full APA / MLA / BibTeX citations are on the series page.

Editorial standards

See CalcFi Editorial Standards for our full methodology, data sources, and correction policy.