Short answer. Annual average 30-year fixed mortgage rates were below 4% from 2012 to 2021 — ten consecutive years. The lowest reading in that span was 2.96% in 2021.
Mortgage rates dropped below 4% in 2012 and stayed there for ten years, until the Federal Reserve's 2022 hiking cycle drove them back above 5% in March 2022 and back above 6% by November 2022.
The full sub-4% run
- 2012: 3.66%
- 2013: 3.98%
- 2014: 4.17% — briefly above 4%, taper-tantrum-driven
- 2015: 3.85%
- 2016: 3.65%
- 2017: 3.99%
- 2018: 4.54% — back above 4% briefly
- 2019: 3.94%
- 2020: 3.11%
- 2021: 2.96% — record low
- 2022: 5.34% — back above 4% (and stayed there)
The lock-in legacy
Roughly 40% of U.S. mortgaged owners hold loans below 3%, and 76% hold loans below 5%. The arithmetic of refinancing or trading up is so unfavorable at current rates that listing inventory has stayed near multi-decade lows.
Why the sub-4% era ended
The 2022 hiking cycle was the fastest in 40 years: 525 basis points across 11 meetings. Mortgage rates moved with it. The 30-year fixed jumped from 3.11% (annual avg 2020) to 5.34% (2022) to 6.81% (2023) — a 3.7-percentage-point rise over three years. The Federal Reserve's $40B/month MBS purchase program ended in March 2022; quantitative tightening began in June 2022. Both withdrew the structural buyer of mortgage-backed securities that had compressed mortgage spreads through the pandemic. The mortgage-Treasury spread also widened from its pre-pandemic norm of ~1.7 points to roughly 2.5 points by late 2023, reflecting prepayment-risk uncertainty and reduced primary-dealer balance-sheet capacity.
What it would take to return below 4%
A return to sub-4% mortgage rates would require some combination of: 10-year Treasury yields back around 2.5%, a normalized mortgage-Treasury spread of 1.5–1.75 points, and either a renewed QE program or a structurally lower neutral federal funds rate. None of these are base-case for 2026–2028 absent a recession deep enough to push the Fed back to zero. Most analysts now treat 5.5%–6.5% as the practical equilibrium 30-year fixed under normal conditions — see what's a "normal" U.S. mortgage rate for the methodology.
Related
- Lowest 30-year mortgage rate ever — the 2.96% record
- The U.S. housing rate-lock effect, explained
- The 30-year mortgage rate today
- What's a "normal" U.S. mortgage rate?
- U.S. housing market in 2021 — the 2.96% record-low year
Sources
U.S. Census Bureau Survey of Construction; National Association of Realtors Existing Home Sales report; Freddie Mac Primary Mortgage Market Survey; National Bureau of Economic Research Business Cycle Dating Committee.