Get Your Refinance Recommendation
This calculator goes beyond a simple break-even calculation. It factors in your planned stay, monthly savings, closing costs, and lifetime interest to give you a straightforward verdict: refinance now, or wait.
How to Use This Calculator
The "Should I Refinance" Calculator is designed to give you a single clear recommendation rather than a collection of numbers you have to interpret yourself. But to get a reliable answer, each input needs to be accurate. Here is what each field means and where to find the right values.
Current Loan Balance
Enter your outstanding principal balance today — the amount you still owe, not what you originally borrowed. Find this on your most recent mortgage statement or your lender's online portal. If you have been paying for several years, your balance will be meaningfully lower than your original loan amount.
Current Interest Rate
This is the annual interest rate on your existing mortgage. Find it on your monthly statement or in your original loan documents. If you have an adjustable-rate mortgage, enter your current rate, not your initial teaser rate. If you are considering switching from an ARM to a fixed rate, our ARM to Fixed Calculator is better suited to that comparison.
Remaining Term in Months
Count the months from today to your loan's payoff date. If you started with a 30-year loan 6 years ago, you have 24 years (288 months) remaining. Your mortgage statement typically shows your maturity date — use that to calculate the remaining months precisely. Getting this number right is important because it determines your current monthly payment amount.
New Interest Rate
Enter the rate from an actual lender quote, not a rate you saw in a headline or advertisement. Advertised rates typically require excellent credit (760+), a specific loan type, and may include discount points. Once you have applied or received a formal Loan Estimate, use the rate from that document. Shopping at least three lenders — a bank, a credit union, and an online lender or mortgage broker — gives you the best chance of finding the most competitive rate. Even a 0.125% difference affects your payment and break-even meaningfully.
New Loan Term
Select the term your lender is offering for the new loan. Remember: choosing a longer term than what remains on your current loan will lower your monthly payment but may cost more in total interest over time. If you currently have 20 years left and take a new 30-year loan, you are adding 10 years of payments. The 15-Year vs 30-Year Calculator can help you model different term options.
Closing Costs
Enter your total estimated closing costs. Lenders must provide a Loan Estimate within 3 business days of your application. If you do not have a formal quote yet, use 2–3% of your loan balance as a rough estimate. You can get a more detailed projection with our Closing Cost Calculator.
Planned Stay — The Most Important Field
This is the single most impactful variable in the entire calculation. Enter your honest best estimate of how many more months you will live in this home before selling, moving, or potentially refinancing again. Be realistic. If you think there is a 30% chance you might relocate in 3 years, consider running the calculation with both a 36-month and a 96-month planned stay to see how the recommendation changes. The recommendation is only as good as the honesty of this number.
How the Recommendation Is Determined
Rather than giving you a list of raw numbers, this calculator makes a concrete recommendation based on the relationship between four key figures: your monthly savings, your closing costs, your break-even period, and how long you plan to stay. Here is exactly how the logic flows.
The Core Formula
The calculator compares the total cost of staying in your current loan for your planned stay period against the total cost of switching to the new loan for the same period:
Positive = refinancing saves money over your horizon. Negative = it costs more.
Break-even is then calculated as: Closing Costs ÷ Monthly Savings = Break-Even Months. If the break-even is less than your planned stay, the refinance is profitable. The verdict categories below reflect different degrees of that profitability.
The Decision Logic
The calculator evaluates your inputs and classifies the result into one of four verdicts:
Net Savings Over Your Stay
This figure is the most practical output: it is how much money you will actually save (or lose) in total if you stay for exactly the number of months you entered. A positive number means refinancing is profitable over your horizon; a negative number means it is not. You can also cross-reference with our Break-Even Calculator to focus specifically on the recovery timeline.
Real-World Example
David's Refinance Analysis
David has a $425,000 loan at 7.00% with 26 years (312 months) remaining. His lender quotes him 6.00% on a new 30-year loan with $9,500 in closing costs. David plans to stay in his home 8 more years (96 months).
Current payment: $425,000 at 7.00% over 312 months = $2,969/month
New payment: $425,000 at 6.00% over 360 months = $2,548/month
Monthly savings: $421/month
Break-even: $9,500 ÷ $421 = 22.6, rounded to 23 months
Net savings over 8-year stay: ($421 × 96) − $9,500 = $40,416 − $9,500 = $30,916
Verdict: Refinance. David's planned stay (96 months) is more than four times his break-even (23 months). After the 23-month recovery period, he saves $421 every month for the next 73 months, generating over $30,000 in net savings over his 8-year horizon. This is a clear, compelling case to refinance immediately.
When Does Refinancing Make Sense?
Not every rate drop warrants a refinance. Here are the situations where the "Should I Refinance" analysis most commonly produces a clear positive recommendation.
Rate Drop of 0.75% or More
A rate reduction of at least 0.75% typically generates enough monthly savings on a typical loan balance to produce a break-even well under 36 months. On a $400,000 loan, a 0.75% rate drop saves roughly $195/month. With $7,000 in closing costs, the break-even is about 36 months. A 1.0% drop generates approximately $260/month savings and a 27-month break-even on the same loan. While the old "1% rule" is too simplistic, it does reflect real math — larger rate drops create more favorable break-even periods.
Staying 3+ Years
The longer your planned stay, the safer and more profitable any refinance becomes. Homeowners who are confident they will remain in their home for 5, 7, or 10+ years have a wide margin of comfort even with modest rate drops and moderately high closing costs. The net savings number grows substantially with each year past break-even. If you are unsure about your plans, use a conservative planned stay estimate — the calculator will tell you if the refinance still works under pessimistic assumptions.
Eliminating PMI Through the Refinance
If your home has appreciated and your new loan-to-value (LTV) is below 80%, refinancing can eliminate private mortgage insurance (PMI). PMI typically costs 0.5%–1.5% of the loan annually, adding $200–$500/month to your effective cost. Removing PMI through a refinance can dramatically shorten the effective break-even period because your total monthly cost drops by more than just the rate savings. Check your current LTV with the LTV Calculator and model PMI removal savings with the PMI Removal Calculator.
Switching from an Adjustable to a Fixed Rate
If you have an adjustable-rate mortgage (ARM) and your fixed period is expiring, refinancing to a fixed rate locks in predictable payments for the remaining life of the loan. The break-even logic still applies, but you also gain certainty — if rates rise significantly, your fixed refinance becomes even more valuable. Use the ARM to Fixed Calculator for a complete comparison that accounts for your ARM's adjustment schedule.
Consolidating to a Shorter Loan Term
Refinancing from 30 years remaining to a 15-year loan at a lower rate can save hundreds of thousands of dollars in lifetime interest, even if the monthly payment increases. The "Should I Refinance" calculator models this — the recommendation logic accounts for the higher monthly payment by comparing total costs over your planned stay. Our 15-Year vs 30-Year Calculator is the best tool for diving deep into this type of comparison.
Common Scenarios
Here are three borrower situations that illustrate how the recommendation changes based on the rate drop, planned stay, and closing costs.
Scenario 1: Small Rate Drop, Medium Stay — Marginal
Emily has a $300,000 balance at 7.00% with 25 years (300 months) remaining. She is quoted 6.50% on a 30-year loan with $6,000 in closing costs. She plans to stay 5 years (60 months). Current payment: $2,121/month. New payment: $1,996/month. Monthly savings: $125. Break-even: $6,000 ÷ $125 = 48 months. Net savings over 60 months: ($125 × 60) − $6,000 = $7,500 − $6,000 = $1,500. The verdict is technically "Refinance" because the break-even (48 months) falls within the planned stay (60 months), but with only 12 months of net savings after recovery, this is a marginal case. If Emily is even slightly uncertain about her 5-year plans, she may be better off waiting for a larger rate drop or a no-closing-cost option.
Scenario 2: Large Rate Drop, Short Stay — Probably Not
Robert has a $450,000 balance at 7.50% with 28 years (336 months) remaining. He is quoted 6.00% on a 30-year loan with $10,000 in closing costs. However, Robert plans to move in 2 years (24 months) due to a family situation. Current payment: $3,377/month. New payment: $2,698/month. Monthly savings: $679. Break-even: $10,000 ÷ $679 = 15 months. Net savings over 24 months: ($679 × 24) − $10,000 = $16,296 − $10,000 = $6,296. On the surface this looks positive — and it is, barely. But with a 2-year horizon and a 15-month break-even, Robert has only 9 months of pure savings before selling. If the sale slips by even a few months, he would come out ahead. He should also consider asking the same lender for a no-closing-cost option to eliminate the upfront risk entirely.
Scenario 3: Solid Rate Drop, Long Stay — Clear Yes
Linda has a $380,000 balance at 7.25% with 23 years (276 months) remaining. She is quoted 6.00% on a 30-year loan with $8,000 in closing costs. Linda has no plans to move for at least 10 years (120 months). Current payment: $2,713/month. New payment: $2,280/month. Monthly savings: $433. Break-even: $8,000 ÷ $433 = 19 months. Net savings over 10 years: ($433 × 120) − $8,000 = $51,960 − $8,000 = $43,960. The verdict is an unambiguous "Refinance." With a 19-month break-even against a 120-month planned stay, Linda has over 8 years of pure savings ahead of her. This is the kind of scenario where the answer is clear and acting quickly is the right move.
Tips and Strategies
Use these practical strategies to get the most out of your refinance analysis and make the strongest possible decision.
Look Beyond the Monthly Payment
A lower monthly payment is not automatically a good refinance. If you currently have 20 years remaining and you refinance into a 30-year loan, you gain a lower payment but add 10 years of interest payments. The lifetime cost may be dramatically higher even at a lower rate. Always check the "Total Interest Saved (Lifetime)" figure, not just the monthly savings. For a full interest comparison, use the Refinance Savings Calculator.
Consider the Effect of Resetting Your Term
Resetting from 22 years remaining to a new 30-year loan is an 8-year extension. On a $350,000 loan at 6.00%, those 8 extra years cost approximately $95,000 in additional interest. If your primary goal is to minimize lifetime interest cost, you should either choose a shorter new term (15 or 20 years) or use extra monthly payments to pay down the new loan faster. Our Extra Payment Calculator can model how additional principal payments affect your payoff timeline and interest cost.
Shop Multiple Lenders
Mortgage rates and fees vary significantly between lenders — often by 0.25%–0.50% on the rate alone, and by thousands of dollars in origination fees. Shopping at least three lenders (and ideally four or five) can reduce your total closing costs by $2,000–$4,000 and improve your rate, both of which directly improve your break-even. Use each lender's Loan Estimate (standardized federal form) to make direct comparisons on Section A (origination charges) and Section B (services you cannot shop for).
Model an Honest Planned Stay
The planned stay estimate is where most refinance analyses go wrong. People tend to be overconfident about how long they will stay. Job relocations, family changes, life events — all of these shorten actual stays. If you truly plan to stay 10 years but have a 20% chance of moving in 3 years, consider running the calculation at 36 months to see if it still makes sense under that scenario. A refinance that looks good only under optimistic assumptions is riskier than one that makes sense even under conservative assumptions.
Check Whether Rates Might Drop Further
If you expect rates to fall significantly in the next 12–18 months, you might consider waiting rather than refinancing now. However, timing the market is risky — rates can also rise. A pragmatic approach: if the refinance makes clear financial sense today (break-even under 24 months), do it now rather than waiting for potentially better rates that may not materialize. You can always refinance again later if rates drop further, especially if you use a no-closing-cost option. For more context on the full refinancing process, visit our Refinance Process guide.
Frequently Asked Questions
How does this calculator determine if I should refinance?
It computes your monthly savings from the lower rate by comparing amortized payments on your current loan versus the proposed new loan. It then divides your closing costs by those monthly savings to find your break-even period. Finally, it compares that break-even to your planned stay and classifies the result as one of four verdicts: excellent savings, savings cover costs, don't refinance due to no payment reduction, or don't refinance because you won't break even in time. The net savings over your stay ties it all together into one bottom-line figure showing exactly how much money you gain or lose over your horizon.
What if I'm not sure how long I'll stay?
Use 60 months (5 years) as a conservative default — the median American homeowner stays about 8 years, but 5 years is a reasonable planning horizon for a moderate-risk assumption. If the break-even is under 60 months, refinancing is very likely worth it. Then run a second scenario at 36 months to see if the deal still works under a more pessimistic assumption. If the refinance is positive at 36 months, you have a strong margin of safety. If it only works at 60+ months, consider the no-closing-cost option to eliminate the upfront cost risk entirely.
Should I refinance if rates drop by less than 1%?
The old "1% rule" is a rough guideline, not a law. What matters is the actual dollar difference on your specific balance and term. A 0.5% drop on a $500,000 loan balance saves over $200/month — which on a $7,000 closing cost structure means a break-even of just 35 months. On a $150,000 balance the same rate drop saves about $60/month, producing a 117-month break-even. Run the numbers for your specific situation rather than relying on a percentage threshold. This calculator is designed for exactly that purpose.
Does a shorter new term affect whether I should refinance?
Yes, in important ways. A shorter term (15 or 20 years) typically comes with a lower interest rate than a 30-year loan, but the monthly payment is higher because you are paying off the principal faster. If the higher payment is affordable, a shorter-term refinance can generate massive lifetime interest savings even if the monthly payment barely changes or even increases. The "Net Savings Over Stay" figure in this calculator accounts for total payment differences, so it correctly reflects shorter-term scenarios. Pair this calculator with the 15-Year vs 30-Year Calculator for a complete comparison.
What if my closing costs are unusually high or low?
Closing costs directly determine your break-even period. Higher costs push the break-even further out; lower costs pull it in. If a lender quotes you unusually high closing costs, compare their Loan Estimate with at least two other lenders — particularly Section A (origination charges), which is entirely within the lender's control and the most negotiable part. Unusually low or zero closing costs usually mean the lender is offering a no-closing-cost option with a higher rate. Always get quotes for both options and compare them using the No-Closing-Cost Refinance Calculator.
Should I refinance if rates might drop further?
This is the classic "waiting for lower rates" dilemma. Rates are unpredictable, and waiting for a better rate means continuing to pay a higher rate in the meantime. If refinancing makes strong financial sense today (break-even under 24 months, solid planned stay), most financial advisors recommend acting rather than waiting. If you do refinance now and rates drop further in 12–18 months, you can refinance again — particularly with a no-closing-cost option, which minimizes the risk of a premature refinance. You do not need to make a single perfect refinancing decision; you can refinance multiple times as conditions improve.
How does my credit score affect whether I should refinance?
Your credit score determines what rate you qualify for, which in turn determines your monthly savings and break-even period. Borrowers with scores above 760 typically qualify for the best advertised rates. Scores between 700–759 usually still qualify for competitive rates with a small premium. Scores below 680 may face significantly higher rates that reduce or eliminate the benefit of refinancing. If your score has dropped since your original mortgage, check whether the available refinance rate still produces a favorable break-even before applying. Improving your score by 20–40 points before applying can sometimes save thousands of dollars. Check our Refinance Glossary for terms like credit score, LTV, and DTI that affect your qualification.
Does this account for tax benefits?
No. This calculator focuses on cash-flow savings — the difference in what you pay each month and over the life of the loan. The mortgage interest deduction can affect your after-tax cost of borrowing, but it applies to both your current and new loan. Since the Tax Cuts and Jobs Act of 2017 nearly doubled the standard deduction, the majority of homeowners no longer itemize, making the mortgage interest deduction irrelevant for most borrowers. For those who do itemize, the net tax impact of refinancing is typically modest and depends on your marginal tax bracket. Consult a CPA or licensed tax professional for a complete after-tax analysis of your specific situation.
External Resources
These authoritative sources provide additional context for making a well-informed refinancing decision.
- CFPB: What is mortgage refinancing and how does it work — the Consumer Financial Protection Bureau's clear explanation of the refinance process, including what to consider before applying.
- HUD: Refinancing Resources — HUD guidance on refinancing options including FHA Streamline Refinance and other government-backed programs.
- Federal Reserve: Current Interest Rates (H.15 Release) — the Federal Reserve's benchmark interest rate data, useful context when evaluating whether the current rate environment is favorable for refinancing.
- Freddie Mac: My Home Refinancing Guide — Freddie Mac's consumer guide covering refinancing basics, how to compare lenders, and what to expect during the process.
- CFPB: Loan Options — an overview of different loan types and structures, helpful for understanding how your new loan options compare.