Refinance Calculator - Should I Refinance?
See how much a lower rate saves you each month.
Monthly savings
$227
Total savings
$67,963
Old monthly payment
$1,688
New monthly payment
$1,461
Interest Comparison
Interest Over Time
Interest Over Time
| Year | Old Interest | New Interest | Savings |
|---|---|---|---|
| 1 | $16,128 | $12,383 | $3,746 |
| 3 | $15,557 | $11,842 | $3,715 |
| 5 | $14,907 | $11,244 | $3,662 |
| 7 | $14,166 | $10,584 | $3,582 |
| 9 | $13,323 | $9,854 | $3,469 |
| 11 | $12,363 | $9,048 | $3,315 |
| 13 | $11,271 | $8,157 | $3,114 |
| 15 | $10,027 | $7,172 | $2,854 |
| 17 | $8,611 | $6,085 | $2,526 |
| 19 | $6,999 | $4,883 | $2,116 |
| 21 | $5,163 | $3,555 | $1,609 |
| 23 | $3,074 | $2,087 | $987 |
| 25 | $696 | $466 | $230 |
Practical Example
Formula: monthly savings = old payment − new payment, where each payment uses M = P[r(1+r)^n] / [(1+r)^n − 1]. Total savings = monthly × remaining months.
Frequently Asked Questions
Should I refinance my mortgage?
Refinancing is often worth it when the new rate is at least 0.5-1% lower and you'll stay long enough to recoup closing costs.
How do I calculate refinance savings?
Compare the new monthly payment to the current one and multiply the difference by remaining months, then subtract closing costs.
Are there fees to refinance?
Yes — closing costs typically run 2-5% of the loan; this calculator focuses on monthly savings, not all upfront fees.
How do interest rates affect my monthly payment?
Interest rates have a major impact on monthly payments. Even a 0.5% difference in APR can change your payment by $50-$200 per month on a typical loan. Use this calculator to compare different rate scenarios side by side.
Should I choose a fixed or variable rate?
Fixed rates give you predictable payments for the life of the loan, while variable rates start lower but can rise over time. Fixed is usually safer for long-term loans (mortgages, auto); variable can make sense for short-term borrowing when you expect rates to fall.
Disclaimer: This calculator provides estimates for informational purposes only. Actual results may vary. Consult a qualified professional for personalized advice.