Mortgage Rates Are Back Above 7%. Should You Pay Down a 7% Mortgage or Invest the Money?
The Federal Reserve raised the federal funds rate to 3.75–4.00% on September 16, 2026, its first increase since 2023. Two days earlier the 10-year Treasury yield had crossed 5% for the first time since October 2023, and by the end of that week daily 30-year mortgage rate averages were back above 7%. If you bought or refinanced in 2020–2021 at 3%, none of this touches your payment. If you bought in the last two years, you are paying something close to 7%, and the question of whether to throw extra money at that loan just got a much clearer answer.
Quick answer
At 7%, paying extra on your mortgage is a guaranteed 7% return — above a 5% Treasury and equal to the long-run stock return most planners assume. On a $300,000, 30-year loan at 7%, $500 extra a month ends the loan 12 years 9 months early and saves $200,235 of interest. Investing that $500 at 7% instead finishes within $100 of the same wealth at year 30: a dead heat, except one path is certain. The condition that flips it: at a rate of 5% or below, investing wins by more than $130,000, so keep the cheap loan.
What the Fed hike changed, and what it did not
The Fed does not set mortgage rates; the bond market does, and it moved first. The 10-year Treasury, which 30-year mortgages are priced off, went from about 4.7% in late July to 5.0% by mid-September, and mortgage rates followed from the mid-6s to just over 7% — the mechanism we described in July when rates rose on a good inflation print.
Two things did change for anyone deciding what to do with spare cash:
- The risk-free alternative got better. A 10-year Treasury at 5% and money-market yields near 4% are real competition for a 6% mortgage. They are not competition for a 7% one.
- The rate you would refinance into got worse. Anyone hoping to refinance a 7% loan down to 6% this autumn is now waiting on a cut that the Fed's own projections do not show until at least 2027. Paying the loan down is the refinance you can do yourself, today.
The number to write on a sticky note is your own rate. Everything below sorts by it.
The math on a $300,000 loan at 7%
Run a 30-year, $300,000 loan at 7% through the mortgage payoff calculator and the baseline is stark: the required payment is $1,996 a month, and over 360 months you would pay $418,527 of interest — more than the house cost. Every extra dollar you send goes straight to principal and earns exactly 7%, tax-free and guaranteed, for as long as the loan would otherwise have run.
| Extra you send | Loan ends | Time saved | Interest saved |
|---|---|---|---|
| $100 a month | 25 yr 10 mo | 4 yr 3 mo | $69,338 |
| $200 a month | 22 yr 11 mo | 7 yr 2 mo | $116,640 |
| $500 a month | 17 yr 4 mo | 12 yr 9 mo | $200,235 |
| Biweekly payments (13 payments a year) | 23 yr 8 mo | 6 yr 4 mo | $102,424 |
| $10,000 lump sum today | 26 yr 11 mo | 3 yr 1 mo | $63,043 |
The lump sum is the one people underestimate. Ten thousand dollars sent to the principal today removes $63,043 of future interest — six times its own size — because it stops compounding against you for 27 years. A bonus sitting in a savings account at 4% has a better use.
Pay down or invest: the honest comparison at 7%
The question is never "is paying extra good?" — it always is. The question is whether the same $500 would do more in an index fund. The calculator settles this the fair way: it measures your wealth at the original payoff date, month 360, under both paths.
Invest path. Keep the loan on schedule and put $500 a month into investments at an assumed 7% a year for 30 years. Final balance: about $614,000.
Pay-down path. Send the $500 to the loan. It is gone in 17 years 4 months. Then invest the whole freed-up $2,496 a month — payment plus extra — at 7% for the remaining 12 years 8 months. Final balance: about $614,000.
The two paths land within $100 of each other. That is not a coincidence; when the mortgage rate equals the investment return, the arithmetic is a wash. What is not a wash is the risk. The 7% from the mortgage is contractual. The 7% from the market is an average that includes 2008 and 2022. So at a 7% rate the verdict on the calculator reads "close call — paying extra is a safe bet," and the tiebreaker is your own tolerance for a bad decade.
Now change one input. At a 5% assumed return — what a cautious planner or a bond-heavy portfolio might earn — the pay-down path wins by about $114,000 ($533,000 versus $418,000). At an 8% return the invest path wins by about $90,000. The whole decision lives inside that three-point band, and nobody knows in advance which end of it the next 30 years will deliver.
Sort the decision by your rate, not by the headlines
Here is the same $500-a-month comparison across the rates people actually hold, all against a 7% investment return:
| Your mortgage rate | Pay-down path at yr 30 | Invest path at yr 30 | Verdict |
|---|---|---|---|
| 5.0% | $479,000 | $614,000 | Invest — keep the cheap loan |
| 6.5% | $572,000 | $610,000 | Close call, leaning invest |
| 7.0% | $614,000 | $614,000 | Dead heat — paying down is the safe version |
| 7.5% and above | Pay-down pulls ahead | Pay it down |
The 3% loans from 2021 are not on the table: keep them forever. The 6.5%–7.5% loans from 2023–2026 are the whole conversation, and September pushed the marginal case from "invest, probably" to "either — and paying down is the one you cannot regret."
Whatever your rate, the table assumes you have already done two things. First, that you have three to six months of expenses in cash — the emergency fund calculator gives you the target, and a paid-down mortgage cannot be spent in a job loss. Second, that you have no debt at a higher rate. A credit card at 24% or a car loan at 9% beats the mortgage every time; the debt payoff planner orders them for you.
The three things the simple math leaves out
Inflation is on the borrower's side. A fixed $1,996 payment gets easier every year prices rise. At 3.4% inflation — August's CPI reading — that payment is worth about 28% less in real terms after ten years. That is an argument for not rushing to repay a fixed-rate loan, and it is why the 5% row above says invest. At 7%, the loan's real cost is still about 3.6% after inflation, which is more than a Treasury pays after inflation.
The tax deduction is smaller than people think. Mortgage interest is only deductible if you itemize, and with the 2026 standard deduction at $16,100 for single filers and $32,200 for married couples filing jointly, most households do not. If you do itemize in the 22% bracket, a 7% loan costs you about 5.5% after tax — still above a Treasury.
Liquidity is real. Money sent to principal is gone until you sell or refinance. If there is any chance you will need it — a job change, a medical bill, a move — the calculator's pay-down path assumes a certainty you may not have. Build the emergency fund first; then send the extra.
What to do this month
If your rate is 7% or higher and you have an emergency fund and no expensive debt, set up an automatic extra principal payment now; even $100 a month removes four years and $69,000. Between 6% and 7%, split the difference — half to the loan, half to investments. At 5% or lower, leave the loan alone and invest; the mortgage payoff calculator will show you the same $135,000 gap the table does, in your own numbers.
And if you were waiting for a cut to refinance: the Fed's September projections put the policy rate at 4.1% at the end of both 2026 and 2027. The refinance may come. Paying the loan down is the version of it you control.
FAQ
Does the Fed rate hike raise my existing mortgage payment?
Not if the loan is fixed-rate, which almost all U.S. mortgages are. Your payment is set for the life of the loan. The hike affects what a new loan or a refinance costs, and it raises rates on variable products — HELOCs, adjustable-rate mortgages past their fixed period, and credit cards — within one or two billing cycles.
Is paying extra on a 7% mortgage better than a 5% Treasury?
Yes, on the numbers. The mortgage prepayment returns 7% guaranteed and tax-free; the Treasury returns 5% before federal tax, which in a 22% bracket is about 3.9% after tax. The Treasury's advantage is liquidity — you can sell it — so keep your emergency fund in cash or Treasuries and send anything beyond that to the loan.
Should I make biweekly payments or just add to the monthly one?
They are the same mechanism: biweekly payments produce 26 half-payments a year, or one extra full payment, which is about $166 a month on a $1,996 payment. On the $300,000, 7% loan that saves $102,424 and 6 years 4 months. Adding $200 a month directly saves $116,640 and 7 years 2 months. Choose whichever your lender makes free and automatic; some charge for biweekly programs, and a fee erases the benefit.
I have a 6.5% mortgage. Did the hike change my answer?
Not much. At 6.5% the pay-down and invest paths finish about $38,000 apart at year 30, with investing ahead on expectation and paying down ahead on certainty. What changed is the alternative: a 5% Treasury now pays more of that 6.5% back than it did in July, so parking money in Treasuries while you decide costs you less than it used to.
Sources
- Federal Reserve — FOMC statement, September 16, 2026 -- the 3.75–4.00% target range and the accompanying projections.
- Freddie Mac — Primary Mortgage Market Survey -- the weekly 30-year fixed-rate average.
- U.S. Bureau of Labor Statistics — Consumer Price Index -- the 3.4% August 2026 annual inflation figure.
- Consumer Financial Protection Bureau — Owning a home -- prepayment and refinance basics.