A 1% rate reduction on a $300,000 mortgage saves approximately $170 per month and over $60,000 in total interest on a 30-year loan. Your actual savings depend on your loan balance, rate reduction, closing costs, and how long you stay in the home.
Refinancing savings come in two forms: monthly savings (lower payment each month) and lifetime savings (less total interest paid). Both matter, but they tell different stories depending on your situation.
Real savings examples by loan size
Here's exactly how much different rate reductions save across common loan balances. All examples assume a 30-year fixed mortgage.
Monthly savings by loan balance and rate reduction
| Loan balance | 0.5% reduction | 1% reduction | 1.5% reduction |
|---|---|---|---|
| $200,000 | $57/mo | $113/mo | $168/mo |
| $300,000 | $85/mo | $170/mo | $252/mo |
| $400,000 | $114/mo | $226/mo | $336/mo |
| $500,000 | $142/mo | $283/mo | $420/mo |
| $750,000 | $213/mo | $424/mo | $630/mo |
A real-world example — full breakdown
Here's a complete before-and-after calculation for a typical homeowner refinancing from 7.5% down to 6.25%:
Example: $320,000 loan, from 7.5% to 6.25%
Calculate your personal savings
Enter your current loan details and the new rate you've been quoted to see your exact monthly savings, break-even point, and lifetime savings.
Use the Refinance Calculator →How to calculate your own savings
You can estimate your savings in three steps:
Find your new monthly payment
Use the refinance calculator with your current balance, new rate, and new term to see what your payment would be.
Calculate your monthly savings
Subtract your new payment from your current payment. This is how much extra cash you'll have each month.
Factor in closing costs
Divide your closing costs by your monthly savings to find your break-even in months. Multiply monthly savings by how long you'll stay, then subtract closing costs for your true net savings.
When savings don't justify refinancing
Not every refinance saves money. Watch out for these situations:
- You're nearly done paying off your loan. In the final years, most of your payment is principal. Resetting to a new 30-year loan means paying more interest overall even at a lower rate.
- You plan to move soon. If you'll sell before your break-even point, closing costs wipe out the savings.
- The rate drop is too small. A 0.25% reduction on a small loan balance may not generate enough monthly savings to justify $5,000–$10,000 in closing costs.
- You extend your term significantly. Refinancing a 15-year loan into a new 30-year loan lowers your payment but dramatically increases total interest paid.
How to maximize your savings
The bigger your rate reduction and the larger your loan balance, the more you save. To get the best rate possible:
- Improve your credit score to 740+ before applying
- Shop at least three lenders and compare APR not just rate
- Consider a shorter loan term — 15-year rates are 0.5%–0.75% lower
- Avoid rolling closing costs into the loan if you can pay them upfront
See real refinance rates in minutes
Compare personalized offers from multiple lenders — free, no commitment, no impact to your credit score.
Compare Refinance Rates →Common questions
How much can I save by refinancing my mortgage?
A 1% rate reduction on a $300,000 30-year mortgage saves approximately $170 per month and over $60,000 in total interest. Your savings depend on your loan balance, rate reduction, and how long you stay in the home.
How do I calculate my refinance savings?
Subtract your new monthly payment from your current payment to get monthly savings. Then subtract closing costs from total savings over your planned stay to get your net savings.
Is saving $100 a month worth refinancing?
Saving $100 per month can be worth it if your closing costs are low. At $100 savings with $3,000 in closing costs, you break even in 30 months. If you plan to stay longer, refinancing saves you money.
How much does a 0.5% rate reduction save?
A 0.5% rate reduction on a $300,000 30-year mortgage saves approximately $85 per month and around $30,000 in total interest over the life of the loan.
What is the average savings from refinancing?
The average homeowner who refinances saves between $150 and $300 per month. Over the life of a 30-year loan, total interest savings typically range from $30,000 to over $100,000.