30-year fixed rates sit at 6.66% while 15-year fixed rates are 5.98% as of late August 2026, widening the spread to 68 basis points.
As of the latest FRED release (2026-08-27), the 30-year fixed mortgage rate stands at 6.66% and the 15-year fixed mortgage rate at 5.98%. The resulting 68-basis-point gap is the widest recorded since early 2024. The 10-year Treasury yield, at 4.67%, anchors the spread between the two mortgage products at 1.99 percentage points.
Borrowers evaluating the 15 year vs 30 year mortgage rate decision must weigh monthly cash flow against lifetime interest cost. The 68-basis-point differential translates to roughly $140 in monthly savings on a $400,000 loan when choosing the 15-year term, but total interest paid drops by more than $160,000 over the life of the loan.
Since January 2023, the 15-year/30-year spread has averaged 55 basis points. The current 68-basis-point spread exceeds that average by 13 points, reflecting lenders’ pricing of extension risk amid an uncertain rate path. The 10-year Treasury spread of 1.99% remains near its 24-month median, indicating that the mortgage spread widening is driven more by credit and prepayment assumptions than by benchmark yield movements.
Rate sheets obtained from lenders in high-cost states show modest dispersion. In California, conforming 30-year fixed averages 6.71% and 15-year 6.04%. Texas lenders quote 6.62% and 5.94%, respectively. Florida’s averages sit at 6.68% and 6.00%. These differences largely track average credit scores and property values rather than local economic conditions.
| Loan Amount | 30-Year @ 6.66% | 15-Year @ 5.98% | Monthly Savings | Lifetime Interest Saved |
|---|---|---|---|---|
| $300,000 | $1,927 | $2,535 | –$608 | $118,000 |
| $400,000 | $2,570 | $3,381 | –$811 | $157,000 |
| $500,000 | $3,212 | $4,226 | –$1,014 | $197,000 |
Payments exclude taxes and insurance. Source: FRED 2026-08-27 rates.
Borrowers who can absorb the higher 15-year payment typically reach the break-even point versus a 30-year loan in under eight years when opportunity cost of capital is set at 5%. For households planning to stay in the home longer than a decade, the 15-year option remains mathematically superior even if rates fall modestly.
Lenders generally require a minimum 740 FICO for the lowest 15-year pricing tier, versus 720 for 30-year. Debt-to-income ceilings are also tighter on shorter terms, averaging 43% versus 49%. Prospective buyers can run live scenarios at HomeRates.ai to test qualification under both products.
Forward curves priced into fed-funds futures imply one additional 25-basis-point cut by December 2026. Mortgage spreads would need to compress by roughly 20 basis points to keep 15-year rates unchanged, an outcome markets currently assign only a 35% probability. Therefore, locking the current 5.98% 15-year rate may still offer relative value.
With the 15 year vs 30 year mortgage rate spread at 68 basis points, households confident in their cash flow should favor the 15-year term to minimize lifetime interest. Those prioritizing liquidity or facing qualification constraints may accept the higher 30-year rate of 6.66% and revisit refinancing if spreads tighten.
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