Refinancing replaces one loan with a cheaper one, at a price. The question is never "are rates lower" but "are they enough lower to pay back the closing costs before you move, sell or refinance again". That is arithmetic. The illustration below uses the Freddie Mac national benchmark; local purchase-rate advertisements are market context, not refinance offers.
The Freddie Mac national average for the week of 2026-09-17 is 6.95%. For market context, the lower endpoint among the ordinary published zero-point purchase rate-table entries checked 2026-09-19 is 6.25%, at Florence Bank; that lender marks it effective 2026-07-31. It is neither a refinance quote nor a borrower-specific cheapest-lender result. Loan amount, LTV, credit, occupancy, membership, property, underwriting, fees and points differ; the survey page carries every table entry and date.
Freddie Mac no longer publishes average fees or points with PMMS. Its national figure is a note-rate benchmark, not a like-for-like zero-point cost comparison or a refinance quote.
The Arithmetic, Worked Once
Take a hypothetical $300,000 balance on a fresh 30-year schedule at 7.95%, exactly one percentage point above this week's 6.95% national benchmark. The principal and interest payment falls from about $2,191 to $1,986 a month, a simplified difference of $205. Against an assumed $4,000 of closing costs, that illustration breaks even after 20 months. This is not a lender quote or a prediction of your refinance terms; replace every assumption with your current loan and a written refinance offer.
Two honest corrections to that clean number. First, closing costs are not one figure: appraisal, title and recording run differently by lender and by loan, and $4,000 here is an assumption you should replace with a written quote. Second, a refinance into a fresh 30-year term lowers the payment partly by stretching your remaining balance back over thirty years. If you are eight years into a mortgage, comparing payments alone flatters the deal; matching the new term to your remaining years is the like-for-like comparison, and it will show a smaller saving than the payment gap suggests.
How Often Waiting Has Paid, Since 1971
The classic rule of thumb says refinance when rates are a point below yours. How often does that chance actually arrive? The weekly record since 1971 can answer for the past: for every week in the series, did a rate at least one point lower appear within the following years?
- Within three years of a given week, a rate a full point lower appeared 48% of the time.
- Within five years, 62% of the time.
- A two-point drop within five years: 32% of the time.
Those are frequencies in one 55-year record that includes the great rate collapse of the 1980s, not odds for the future; nobody can hand you the next five years. What the record does say is that the one-point chance has been common but far from guaranteed, and the two-point refinance most people are quietly waiting for arrived in under a third of the five-year windows.
The 30-Year Rate, Every Week Since 1971
6.95%the national average for the week of 2026-09-17
The shape explains the folklore. Anyone who borrowed in the early 1980s refinanced into a huge saving almost no matter when they acted, and that memory became the advice. Anyone who borrowed at the 2021 floor may never see a reason to refinance at all. Both are the same chart.
What This Does Not Mean
None of this says whether you should refinance; it says how to check. The sequence that answers it for a specific loan: your current rate and remaining balance from your statement, a written quote with all costs from at least one local desk and one national one, and the break-even division above. If the months to break even are fewer than the months you expect to keep the house, the arithmetic is in favour.
The local quotes move weekly, and how local published note rates compare with the national average is tracked here continuously. The longer view, what a mortgage has cost in every year since 1971 and what each level did to the payment, is its own record.
Sources
- Freddie Mac, Primary Mortgage Market Survey, via FRED. The weekly average 30-year fixed rate, April 1971 to this week.
- Published rate pages of western Massachusetts banks and credit unions. Ordinary published zero-point purchase-rate context checked 2026-09-19; lower displayed endpoint effective 2026-07-31.
"Figures through" is the period the publisher's data describes; "checked" is only when we last asked. The full sourcing: sources and method.