$
%
Your current or expected rate
%
$
6.75% on $360,000 loan
How different rates affect your payment
Monthly P&I
Total Interest
$396,310
-234/mo
Monthly P&I
Total Interest
$437,969
-118/mo
Monthly P&I
Total Interest
$459,160
-60/mo
Monthly P&I
Total Interest
$480,583
Monthly P&I
Total Interest
$502,232
+60/mo
Monthly P&I
Total Interest
$524,100
+121/mo
Monthly P&I
Total Interest
$568,470
+244/mo
See how rate changes affect monthly payment
5.75%
$2,101
6.25%
$2,217
6.50%
$2,275
6.75% (base)
$2,335
7.00%
$2,395
7.25%
$2,456
7.75%
$2,579
Practical implications for your mortgage
$1,440/year
At 6.75%
$1,440/year more
What these numbers mean for you
Base rate (6.75%): $2,335/month, $480,583 total interest
±0.25%: Changes payment by ~$60/month
±0.5%: Changes payment by ~$120/month
±1.0%: Changes payment by ~$239/month
A 1% rate difference costs/saves $86,080 in interest over 30 years
Use this to decide: Is it worth paying points to buy down? Should you float or lock? How much does timing matter?
On a $360,000 loan, every 0.25% rate change affects your payment by $60/month($720/year). A 1% difference means $239/month more or less—that's $2,868/year and significant interest over 30 years.
Here are the exact formulas behind your numbers. No black boxes — just math.
Payment at Each Rate
Payment Change per 0.25%
Total Interest at Each Rate
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