Calculator
Example Data Table
| Item | Example Value |
|---|---|
| Current balance | $275,000.00 |
| Current rate | 7.250% |
| Remaining term | 25 years |
| New rate | 6.250% |
| New term | 20 years |
| Closing costs | $4,200.00 |
| Discount points | 1.00% |
| Cash-out | $0.00 |
| Roll costs into loan | Yes |
Formula Used
Monthly payment formula: M = P × [r(1 + r)^n] ÷ [(1 + r)^n - 1]
M is the scheduled monthly payment.
P is the loan principal.
r is the monthly interest rate, which equals annual rate ÷ 12.
n is the total number of monthly payments.
New loan amount: Current balance + cash-out + financed costs.
Points cost: Base refinance amount × points percentage.
Break-even months: Total refinance costs ÷ monthly savings.
Net lifetime savings: Current interest - (new interest + refinance costs).
How to Use This Calculator
Enter the current loan balance and your present mortgage rate.
Add the remaining loan term in years and months.
Include any extra monthly payment on the current loan.
Enter the proposed refinance rate and new term.
Add closing costs, discount points, and any cash-out amount.
Choose whether refinance costs are paid upfront or financed.
Submit the form to see monthly payment changes, break-even timing, and total interest comparison.
Use the CSV and PDF buttons to save or share the results.
Home Loan Refinance Planning Guide
Why refinance analysis matters
Home loan refinance calculators help borrowers compare real financing outcomes. A lower rate looks attractive. Still, the lowest rate does not always create the best deal. Payment size, closing costs, loan term, and cash-out choices all matter. This calculator brings those factors together in one place. It shows the payment effect. It also shows break-even timing and long-run interest impact.
What this calculator compares
Refinancing can reduce monthly pressure. It can also shorten payoff time. Some borrowers refinance to remove years from the loan. Others refinance to improve cash flow. A careful comparison prevents costly assumptions. Small rate changes can create meaningful savings on large balances. Yet expensive fees can erase those gains. That is why a refinance decision should always be measured, not guessed.
Break-even and lifetime savings
This tool compares your current mortgage against a proposed replacement loan. It uses the remaining balance, current rate, remaining term, and optional extra payment. Then it models the new rate, new term, points, closing costs, and cash-out amount. It also checks whether costs are paid upfront or added into the new balance. That gives a more realistic payment estimate. It also improves interest forecasting. You can test different term lengths quickly. You can see when lower payments hide higher total borrowing costs.
Better mortgage planning
Break-even months show how long savings take to recover refinance costs. This number is useful when you may move soon. Monthly savings alone can mislead. A longer term may lower payments but increase total interest. A shorter term may raise payments but reduce lifetime borrowing cost. Strong refinance analysis should review both cash flow and total interest. That balance is important for families managing budgets, equity goals, and long-term housing plans.
Use this calculator before requesting quotes or locking a rate. Test several scenarios. Compare no-point and point-based offers. Review shorter and longer terms. Add expected cash-out only when needed. The best refinance option fits your budget, timeline, and payoff goals. Clear numbers support calmer decisions. Better comparisons often lead to better mortgage outcomes. This page also helps you document results for lenders, planners, or household budgeting reviews.
FAQs
How does this refinance calculator estimate the new payment?
It applies the standard amortization formula using the new loan amount, interest rate, and term. If you roll costs into the refinance, the financed balance increases before the payment is calculated.
What is break-even in a mortgage refinance?
Break-even is the number of months required for monthly savings to recover refinance costs. It helps you judge whether the refinance still makes sense if you expect to move or sell soon.
Should I choose the lowest rate automatically?
Not always. A lower rate can come with points, fees, or a longer term. The better choice depends on payment relief, total interest, break-even timing, and how long you expect to keep the loan.
Why can a refinance lower my payment but increase lifetime cost?
A longer term spreads repayment over more months. That often reduces the monthly payment. However, paying interest over a longer period can increase the total borrowing cost.
What happens when I roll closing costs into the loan?
Your upfront expense drops, but the new principal increases. That usually raises total interest and can reduce monthly savings. It is helpful when cash is tight, but it changes the long-run cost.
How do points affect refinancing results?
Points are prepaid interest charges. Paying points can reduce the rate, but they add cost at closing. This calculator includes points in the refinance cost and can finance them when selected.
Can I compare extra payments in both loans?
Yes. Enter optional extra monthly payments for the current loan and the refinance scenario. The calculator adjusts payoff time, interest totals, and comparison results based on those added amounts.
Is cash-out refinancing always a good idea?
No. Cash-out increases the new loan amount. It may help with large planned expenses, but it also raises debt and can reduce refinance savings if used without a clear purpose.