{
  "accessedAt": "2026-10-08",
  "unit": "percent",
  "sourceAgency": "Freddie Mac",
  "scope": "US national conventional conforming single-family purchase mortgage applications; not a Bay Area jumbo quote",
  "method": "Annual averages calculated by author as simple arithmetic mean of published weekly 30-year FRM observations on official PMMS archive pages. Not loan-count or balance weighted. Year-end values are last publication in each calendar year.",
  "methodologyBreak": {"date": "2022-11-17", "description": "Freddie Mac changed from lender survey to Loan Product Advisor application data; ARM and points series discontinued."},
  "rates": [
    {"date": "2021-12-30", "30y": 3.11, "annualAverage": 2.9576923077, "annualAverageRounded": 2.96, "observationCount": 52, "method": "Simple mean of 52 official weekly PMMS 30-year FRM values; date and 30y denote last publication of year", "sourceUrl": "https://www.freddiemac.com/pmms/archive?year=2021"},
    {"date": "2022-12-29", "30y": 6.42, "annualAverage": 5.3440384615, "annualAverageRounded": 5.34, "observationCount": 52, "method": "Simple mean of 52 official weekly PMMS 30-year FRM values; methodology changes November 17; date and 30y denote last publication of year", "sourceUrl": "https://www.freddiemac.com/pmms/archive?year=2022"},
    {"date": "2023-12-28", "30y": 6.61, "annualAverage": 6.8067307692, "annualAverageRounded": 6.81, "observationCount": 52, "method": "Simple mean of 52 official weekly PMMS 30-year FRM values; date and 30y denote last publication of year", "sourceUrl": "https://www.freddiemac.com/pmms/archive?year=2023"},
    {"date": "2024-12-26", "30y": 6.85, "annualAverage": 6.7211538462, "annualAverageRounded": 6.72, "observationCount": 52, "method": "Simple mean of 52 official weekly PMMS 30-year FRM values; date and 30y denote last publication of year", "sourceUrl": "https://www.freddiemac.com/pmms/archive?year=2024"},
    {"date": "2025-12-31", "30y": 6.15, "annualAverage": 6.5950943396, "annualAverageRounded": 6.60, "observationCount": 53, "method": "Simple mean of 53 official weekly PMMS 30-year FRM values; date and 30y denote last publication of year", "sourceUrl": "https://www.freddiemac.com/pmms/archive?year=2025"},
    {"date": "2026-10-08", "30y": 7.40, "15y": 6.73, "annualAverage": null, "method": "Latest published weekly PMMS mean; not annual average; confirmed against FRED MORTGAGE30US same date", "sourceUrl": "https://www.freddiemac.com/pmms", "verificationUrl": "https://fred.stlouisfed.org/series/MORTGAGE30US"}
  ],
  "calculations": {
    "method": "Standard monthly amortizing payment P*r/(1-(1+r)^(-360)), r=annualRate/12; payments rounded to dollar; 20 percent down and 30 years; not lender quotes",
    "exclude": ["points", "closing fees", "insurance", "HOA", "maintenance", "utilities", "supplemental tax"],
    "propertyTaxScenario": {"annualAssumedRate": 0.012, "method": "Illustrative assumption only; use parcel-specific actual tax and direct assessments"},
    "paymentScenarios": [
      {"price": 2000000, "downPayment": 400000, "principal": 1600000, "taxAssumptionMonthly": 2000, "payments": [{"annualRate": 0.05, "principalInterestMonthly": 8589}, {"annualRate": 0.06, "principalInterestMonthly": 9593}, {"annualRate": 0.07, "principalInterestMonthly": 10645}, {"annualRate": 0.074, "principalInterestMonthly": 11078}]},
      {"price": 2500000, "downPayment": 500000, "principal": 2000000, "taxAssumptionMonthly": 2500, "payments": [{"annualRate": 0.05, "principalInterestMonthly": 10736}, {"annualRate": 0.06, "principalInterestMonthly": 11991}, {"annualRate": 0.07, "principalInterestMonthly": 13306}, {"annualRate": 0.074, "principalInterestMonthly": 13848}]}
    ]
  }
}