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How Much Does a 1% Drop in Mortgage Rates Actually Save?

Author
Raja
Raja writes every article on Smart Personal Finance. Since January 2025 he has published 44 long-form guides — around 85,000 words in total — covering investing, market analysis, cryptocurrency, budgeting and everyday money decisions.

The 1% Question Every Homeowner Is Asking Right Now
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Mortgage rates just touched their highest level since January 2025 the 30-year fixed averaged 6.95% as of September 17, four weeks in a row of increases, and a lot of that is tied straight back to the Fed’s rate hike earlier this month. So it’s no surprise people keep asking some version of the same thing: if rates dropped even one point, how much would that actually put back in my pocket?

The honest answer is: more than you’d think for your monthly payment, and a genuinely large amount if you look at the full 30 years. Let’s actually run the numbers instead of just gesturing at “you’d save some money.

The Real Math, Using Today’s Rates
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Take a fairly typical $300,000 loan. At today’s average of 6.95%, your monthly principal-and-interest payment lands around $1,986. Drop that rate by one full point, to 5.95%, and the same loan costs about $1,789 a month.

That’s a difference of roughly $197 every single month.

Doesn’t sound life-changing on its own, maybe. But stretch it out:

  • Per year: about $2,364
  • Over 30 years: close to $71,000 in payments you never make

That last number is the one that tends to surprise people. A single percentage point, held constant across the loan, works out to more than double what you originally borrowed being paid in interest savings alone by the time you’re done.

What It Looks Like at Different Loan Sizes
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The dollar amount obviously scales with how much you borrowed, but as a rough rule of thumb, a 1-point drop trims your monthly payment by about 10%, no matter the loan size. Here’s how that plays out:

Loan AmountMonthly Savings (1-Point Drop)
$200,000~$131
$300,000~$197
$400,000~$263
$500,000~$328

If you want your own number, take your current monthly payment and knock off roughly 10% it won’t be exact, but it’ll get you close enough to know whether it’s worth chasing down an actual quote.

Why the Starting Point Changes Everything
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Here’s the part most quick calculators skip: a 1-point drop doesn’t save you the same amount at every rate level. Going from 8% to 7% saves you more than going from 4% to 3%, even though it’s the same one-point move. That’s because payments respond more sharply to rate changes when rates are already high which, conveniently, is exactly where we are right now.

So if anything, today’s environment is actually one of the better times for a 1-point drop to matter in dollar terms, precisely because rates are sitting near 7% instead of near 3%.

Term Length Matters Too
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Everything above assumes a 30-year fixed loan. If you’re on a 15-year instead averaging 6.26% right now the monthly savings from a 1-point drop are a bit smaller, since you’re paying down principal faster and less of your payment is interest to begin with. But the total interest saved over the shorter life of the loan is still meaningful, just compressed into fewer years.

Should You Actually Refinance for 1 Point?
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This is where the math has to meet reality. A refinance isn’t free closing costs typically run 2% to 5% of your loan amount, so on that same $300,000 loan, you might be looking at $6,000 to $15,000 upfront.

The way to think about it: divide your closing costs by your monthly savings, and that tells you your break-even point in months.

$9,000 in closing costs ÷ $197 in monthly savings ≈ 46 months to break even.

If you’re confident you’ll stay in the home past that point, the refinance pays for itself and then some. If you might sell or move before then, it may not be worth it you’d be paying for savings you never get to fully collect.

The Bottom Line
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A 1% drop in your mortgage rate isn’t a rounding error. On a typical loan, it’s real money a couple hundred dollars a month, and tens of thousands over the full term. Whether it’s worth acting on comes down to your specific loan size, your current rate, and how long you plan to stay put. But it’s worth actually running your own numbers rather than assuming a single point “doesn’t make much difference” because on paper, it clearly does.

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