Mortgage Refinance Calculator
Refinance Calculator
The decision to refinance depends on your specific financial situation, including your current interest rate, remaining loan balance, expected time in the home, and closing costs. As a general guideline, refinancing is worth considering when you can reduce your interest rate by at least 0.75 to 1 percentage point. However, smaller rate reductions can still make sense for high loan balances. On a $500,000 loan, a 0.5 percent rate reduction saves about $150 per month, while on a $150,000 loan, the same reduction saves only about $45 per month.
Your remaining loan term also matters. If you are 10 years into a 30-year mortgage, refinancing to a new 30-year loan restarts the amortization clock, meaning you will pay mostly interest for the first several years again. In this situation, consider refinancing to a 15-year or 20-year loan to align the new term with your remaining original term. This strategy captures the rate reduction while avoiding extended interest costs.
The refinance breakeven point is the most important single metric in the decision. Calculate it by dividing total closing costs by the monthly savings. For example, $6,000 in closing costs divided by $150 monthly savings equals 40 months. If you plan to stay in the home longer than 40 months, refinancing saves money. If you expect to move or sell before then, the refinance costs more than it saves. Be realistic about your plans — many homeowners overestimate how long they will stay in a home.
The Mortgage Refinance Calculator helps homeowners evaluate whether refinancing their existing mortgage makes financial sense. Refinancing activity in the United States fluctuates significantly with interest rate movements. When rates drop by one percentage point or more, refinance applications typically surge by 50 to 100 percent as homeowners rush to lock in lower payments. Understanding when refinancing works in your favor requires careful analysis of your specific loan terms, current rates, closing costs, and how long you plan to stay in your home. Refinancing involves replacing your current home loan with a new one, ideally at a lower interest rate, with different terms, or both. While the prospect of lower monthly payments is appealing, refinancing comes with closing costs that must be recovered through monthly savings over time. This calculator performs a detailed comparison between your current loan and a proposed refinance loan.
Refinancing can serve multiple financial goals. The most common reason is to secure a lower interest rate, which reduces monthly payments and total interest costs. Another important but often overlooked benefit of refinancing is the ability to change from an adjustable-rate mortgage to a fixed-rate mortgage. Borrowers with ARMs approaching their adjustment period may face significant payment increases when rates reset, making refinancing into a fixed-rate loan a prudent risk-reduction strategy even if the new rate is not substantially lower than their current ARM rate. Another common strategy is to shorten the loan term, such as refinancing from a 30-year to a 15-year mortgage. This typically increases monthly payments but dramatically reduces total interest paid and builds equity much faster.
Timing is critical when considering a refinance. A good rule of thumb is to consider refinancing when you can lower your rate by at least 0.5 to 1 percentage point. The breakeven period is the key metric: if you plan to sell or move before reaching breakeven, refinancing will cost you money rather than save it.
Enter your current loan balance, interest rate, and remaining term. The calculator estimates your current monthly payment. Enter the proposed new rate, term, and total closing costs. If rolling closing costs into the new loan, adjust the balance accordingly.
Press Calculate to see your current versus new payment, monthly savings, total interest comparison, and breakeven months. For example, a $200,000 balance at 7 percent with 25 years remaining refinanced to 5.5 percent with $6,000 closing costs saves approximately $90 per month and breaks even in about 32 months.
The breakeven period is critical: divide closing costs by monthly savings to get months to breakeven. If you plan to stay beyond that, refinancing makes sense. If you expect to move before then, it likely costs you money.
The breakeven calculation is straightforward: divide your total closing costs by the monthly savings from the lower payment. For example, if refinancing costs $5,000 in closing costs and saves $150 per month, your breakeven is about 33 months. If you plan to stay in the home for 5 years, refinancing saves you roughly $4,000 after recouping costs. If you might move in 2 years, you would lose about $1,400. The breakeven period can be shortened by choosing a no-closing-cost refinance, where the lender covers fees in exchange for a slightly higher rate. In that case, the breakeven is immediate, but the long-term savings are smaller. This calculator shows you the exact breakeven point for your specific numbers, giving you a clear decision rule based on how long you expect to remain in the home.
Monthly payment for a fixed-rate amortizing loan:
Monthly savings from refinancing:
Breakeven period measured in months:
Monthly payment for a $250,000 loan at various rates and terms:
| Rate | 15-Year | 20-Year | 30-Year |
|---|---|---|---|
| 4% | $1,849 | $1,515 | $1,194 |
| 5% | $1,977 | $1,650 | $1,342 |
| 6% | $2,110 | $1,791 | $1,499 |
| 7% | $2,247 | $1,938 | $1,663 |
| 8% | $2,389 | $2,091 | $1,835 |
Shop with at least three to five lenders and compare both rates and closing costs. A slightly higher rate with lower closing costs might be better if you plan to move within a few years. Paying discount points to buy down the rate makes sense if you plan to stay for many years.
Consider the total cost, not just the monthly payment. Extending the loan term can lower payments but increase total interest. Always ask for a loan estimate document from each lender for standardized fee comparison.
Understanding the difference between rate-and-term refinancing and cash-out refinancing is important when evaluating your options. A rate-and-term refinance replaces your existing loan with a new one at a different rate or term without changing the principal balance. This is the most common type and what this calculator models by default. A cash-out refinance replaces your loan with a larger one, allowing you to pocket the difference as cash. Cash-out refinancing can be used for home improvements, debt consolidation, or other large expenses. However, cash-out refinancing typically comes with slightly higher rates than rate-and-term, and the increased loan balance means larger monthly payments and more total interest. Mortgage lenders generally limit cash-out to 80 percent of your home equity. This calculator focuses on rate-and-term refinancing, so if you are considering cash-out, subtract the cash you plan to take from the new loan amount.
For more information, see the Debt Consolidation Calculator.
Many lenders advertise no-closing-cost refinances, but the term can be misleading. A true no-cost refinance has no closing costs at all, but this is rare. Most no-closing-cost refinances work by paying a higher interest rate in exchange for the lender covering the closing costs. The lender calculates the total closing costs and offers a rate high enough that the increased interest payments over time offset the upfront fees they are waiving.
The trade-off is straightforward: a no-closing-cost refinance gives you immediate savings with no upfront payment, but the long-term interest cost is higher because of the elevated rate. For example, refinancing a $250,000 loan could involve paying $5,000 in closing costs with a 5.75 percent rate, or paying zero closing costs with a 6.25 percent rate. The no-cost option saves $5,000 upfront but adds about $75 per month in extra interest. After 67 months, the low-cost option becomes cheaper. If you plan to move within 5 years, the no-cost option wins. If you plan to stay longer, paying the closing costs is better.
This calculator does not consider tax implications of refinancing or prepayment penalties. The analysis assumes you keep the new loan for its full term. If you sell or refinance again, actual interest savings will be less than projected. Prepayment penalties are a critical concern when refinancing. Some mortgages include a prepayment penalty clause that charges a fee if you pay off the loan within a certain period, typically the first three to five years. These penalties are expressed as a percentage of the outstanding balance or as a fixed number of months of interest. For example, a 2 percent prepayment penalty on a $250,000 loan would cost $5,000, potentially wiping out years of savings from the refinance. Always check your current loan documents for prepayment penalty terms before proceeding with a refinance application.
- What is the breakeven point?
- When cumulative monthly savings equal total refinancing costs. Divide closing costs by monthly savings. If breakeven is 20 months, stay past that for savings.
- How do I calculate total interest savings?
- Difference between remaining interest on current loan and total interest on new loan. The calculator compares both schedules.
- Is refinancing worth it if I plan to sell soon?
- No, if selling before breakeven point. You would pay more in closing costs than you save in monthly payments.
- What factors affect whether I should refinance?
- Current vs new rate, remaining balance, closing costs, expected time in home, credit score, and monthly cash flow goals.
- How does extending my loan term affect total interest?
- Extending the term lowers monthly payment but can increase total interest despite a lower rate. The calculator shows both scenarios.
Last updated: July 10, 2026
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