6% vs 7% Mortgage: How Much More Does 1% Really Cost?
A one-percentage-point difference in a mortgage rate may not sound dramatic.
On a large 30-year loan, it can be.
A $500,000 mortgage at 6% costs about $2,998 per month in principal and interest.
At 7%, the same loan costs about $3,327 per month.
That is roughly $329 more every month.
On a 30-year fixed mortgage, moving from 6% to 7% increases principal and interest by roughly:
$197/month on $300,000
$263/month on $400,000
$329/month on $500,000
$493/month on $750,000
On a $500,000 loan held for the full 30 years, the higher rate produces roughly $118,000 more interest.
6% vs 7% Mortgage Payments
Here is what a one-percentage-point difference looks like across several common loan amounts.
| Loan Amount | 6% Payment | 7% Payment | Monthly Difference | Annual Difference |
|---|---|---|---|---|
| $300,000 | $1,799 | $1,996 | $197 | $2,367 |
| $400,000 | $2,398 | $2,661 | $263 | $3,156 |
| $500,000 | $2,998 | $3,327 | $329 | $3,945 |
| $600,000 | $3,597 | $3,992 | $395 | $4,734 |
| $750,000 | $4,497 | $4,990 | $493 | $5,918 |
These calculations assume a 30-year fixed-rate mortgage and include principal and interest only.
How Much Does 1% Add per $100,000 Borrowed?
There is a useful shortcut hidden in the numbers.
At these rates, every $100,000 borrowed costs approximately:
| Rate | Monthly P&I per $100K |
|---|---|
| 6% | About $600 |
| 7% | About $665 |
| Difference | About $66/month |
So a rough mental shortcut is:
≈ $66 more per month for every $100,000 borrowed
It is only a shortcut, but it makes the effect of mortgage rates much easier to visualize.
$500K Mortgage: 6% vs 7%
Now look more closely at a $500,000 loan.
| 30-Year Mortgage | 6% | 7% |
|---|---|---|
| Monthly principal & interest | $2,998 | $3,327 |
| Annual P&I | About $35,973 | About $39,918 |
| Total interest over 30 years | About $579,191 | About $697,544 |
| Difference | About $118,354 more interest |
Why Does Just 1% Cost So Much?
A mortgage is both large and long.
You are not paying the higher rate for one month or one year. Interest is calculated as the outstanding loan balance is gradually paid down over hundreds of payments.
On a 30-year mortgage, there are 360 monthly payments.
That combination — a large balance plus a long repayment period — magnifies relatively small differences in interest rates.
But You May Not Actually Pay the 30-Year Difference
The $118,000 comparison on a $500,000 loan assumes both mortgages are held for the entire 30-year term without refinancing or making extra principal payments.
Real life can be different.
You might:
- Sell the home
- Refinance
- Make extra principal payments
- Pay off the mortgage early
So the full-term interest comparison shows the mathematical effect of the rate, not a prediction of what every homeowner will actually pay.
What Does the Difference Look Like After 5 Years?
Monthly cash flow matters even if you never keep the mortgage for 30 years.
On a $500,000 mortgage, the payment difference is about $329 per month.
That is roughly the additional principal-and-interest cash outflow over five years from the higher monthly payment alone.
But there is another difference: the remaining loan balance.
At 7%, You Also Pay Down Principal More Slowly
Because more of the early payment goes toward interest at the higher rate, the loan balance falls more slowly.
For a $500,000 30-year mortgage, after approximately five years:
| After 60 Payments | 6% | 7% |
|---|---|---|
| Remaining balance | About $465,300 | About $470,500 |
| Principal repaid | About $34,700 | About $29,500 |
So the higher rate can hurt in two ways:
- You make a higher monthly payment.
- You build mortgage equity through principal repayment more slowly.
Does 1% Change How Much House You Can Afford?
Potentially, yes.
Suppose your budget allows approximately $3,000 per month for mortgage principal and interest.
At 6%, that payment supports a loan of roughly $500,000.
At 7%, the same $3,000 monthly principal-and-interest budget supports only about $451,000.
6% → about $500K mortgage
7% → about $451K mortgage
Difference:
roughly $49,000 less borrowing power
This is one reason mortgage-rate movements can quickly affect homebuyer budgets.
Monthly Payment Is Not the Full Housing Payment
The calculations above include only mortgage principal and interest.
Your actual monthly housing cost may also include:
- Property taxes
- Homeowners insurance
- Mortgage insurance
- HOA or condo fees
The Consumer Financial Protection Bureau distinguishes principal and interest from the total monthly mortgage payment because taxes and insurance can materially increase what a homeowner actually pays each month.
Example: The Same Home at 6% and 7%
Suppose a $500,000 mortgage is attached to a home with the following illustrative monthly costs:
- Property taxes: $750
- Homeowners insurance: $175
- HOA: $200
| Monthly Cost | 6% | 7% |
|---|---|---|
| Principal & interest | $2,998 | $3,327 |
| Property taxes | $750 | $750 |
| Homeowners insurance | $175 | $175 |
| HOA | $200 | $200 |
| Illustrative total | $4,123 | $4,452 |
The taxes, insurance and HOA numbers above are examples only and are not estimates for any particular property.
Should You Pay Points to Get From 7% to 6%?
Sometimes a lender may offer a lower interest rate in exchange for paying discount points upfront.
But a lower rate is not automatically worth the upfront cost.
You need another break-even calculation.
Suppose, purely for illustration, lowering the rate costs $15,000 upfront and reduces the payment by $329 per month.
That is roughly 3.8 years before the monthly payment savings recover the upfront cost, ignoring tax effects and other differences.
If you expect to sell or refinance before then, paying the points could be less attractive.
Actual points, rates and lender pricing vary, so use your Loan Estimate rather than assuming this example applies to your mortgage.
What If Rates Fall After You Buy?
You may be able to refinance later, but refinancing is not free and future rates are unknown.
A refinance can involve closing costs, a new loan term and a new break-even calculation.
That means “I can always refinance later” should not be the only reason you accept a mortgage payment that is uncomfortable today.
6% vs 7% Mortgage Calculator
Enter your own loan amount to see how much the one-point rate difference changes the monthly payment.
How Should You Compare Two Mortgage Rates?
Do not look only at the interest-rate number.
Compare:
- Monthly principal and interest
- Total monthly housing payment
- APR
- Discount points
- Lender fees and closing costs
- Cash needed at closing
- How long you expect to keep the loan
The Consumer Financial Protection Bureau's Loan Estimate is designed to help borrowers compare important loan terms and costs across mortgage offers.
FAQ
How much more is a 7% mortgage than a 6% mortgage?
On a 30-year fixed loan, the difference is about $66 per month for every $100,000 borrowed. On a $500,000 mortgage, the difference is approximately $329 per month.
What is the payment on a $500,000 mortgage at 6%?
Approximately $2,998 per month in principal and interest on a 30-year fixed-rate mortgage.
What is the payment on a $500,000 mortgage at 7%?
Approximately $3,327 per month in principal and interest on a 30-year fixed-rate mortgage.
How much does 1% add to a $400,000 mortgage?
Moving from 6% to 7% increases principal and interest by about $263 per month on a $400,000, 30-year fixed mortgage.
How much does 1% add to a $750,000 mortgage?
The monthly principal-and-interest difference is approximately $493 on a $750,000, 30-year mortgage when comparing 6% with 7%.
Does a 1% mortgage-rate difference really matter?
Yes. Because mortgages combine large balances with long repayment periods, a one-percentage-point difference can materially affect monthly cash flow, total interest and borrowing power.
Should I wait for mortgage rates to drop 1%?
No one knows exactly where future mortgage rates or home prices will move. A better starting point is whether the total housing payment available today fits comfortably within your finances.
Should I pay points for a lower mortgage rate?
It depends on the upfront cost, monthly savings and how long you expect to keep the loan. Divide the upfront cost of obtaining the lower rate by the monthly payment savings to estimate a simple break-even period.
Bottom Line
A move from 6% to 7% is not “just 1%” when you are borrowing hundreds of thousands of dollars for 30 years.
On a $500,000 mortgage, it increases principal and interest by approximately $329 per month.
That is about $3,945 per year.
If both loans are kept for the full 30-year term, the 7% mortgage produces approximately $118,000 more total interest.
And with the same monthly payment budget, the higher rate can reduce how much you can borrow by tens of thousands of dollars.
That is why mortgage rates should ultimately be translated into one number:
What does this rate do to my actual monthly payment?
Sources
- Freddie Mac — Primary Mortgage Market Survey
- Consumer Financial Protection Bureau — Principal and Interest vs. Total Monthly Mortgage Payment
- Consumer Financial Protection Bureau — Loan Estimate Explainer
- Consumer Financial Protection Bureau — Discount Points and Lender Credits
- Consumer Financial Protection Bureau — Compare Loan Offers
This article is for general informational purposes only and is not individualized mortgage, lending, financial, tax or legal advice. Actual mortgage rates, APRs, points, fees and underwriting terms vary by lender and borrower.
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