Refinance Calculator — Free Mortgage Savings (2026)
Calculate your savings from refinancing your mortgage, compare new rates and terms, and find the break-even point to know if refinancing pays off.
Current Mortgage
New Loan
Refinance Summary
New Payment
$1,670.33
Break-Even Point
1y
Lifetime Savings
$45,356.40
Refinancing looks like a good option!
About this calculator
Comprehensive Guide to Mortgage Refinancing
Refinancing means replacing your current mortgage with a new loan, ideally with better terms. The primary goal is usually to lower your interest rate, reducing monthly payments and total interest paid. However, refinancing isn't free—closing costs typically run 2-5% of the loan amount ($4,000-$15,000 on a $300,000 mortgage). Understanding whether refinancing makes financial sense requires calculating the break-even point—when your monthly savings exceed your closing costs.
Refinancing can be transformative financially. A 1% rate drop on a $300,000 mortgage saves roughly $200/month and $70,000 over 30 years. But only if the closing costs are recovered through savings. The key question: "Will I stay in the home long enough for the monthly savings to exceed closing costs?" Answering this requires accurate math, not guessing.
How to Use the Refinance Calculator
Using our refinance calculator is straightforward:
Enter Current Loan Details
- Current loan balance (not original amount)
- Current interest rate
- Years remaining on mortgage
- Current monthly payment
Enter New Loan Terms
- New interest rate (refinance offer)
- New loan term (years)
- Estimated closing costs
- Any cash-out amount (if applicable)
View Comparison
- New monthly payment
- Monthly savings
- Break-even point in months/years
- Total lifetime savings (if keeping home)
Analyze Decision
- If you'll stay past break-even: refinance makes sense
- If you might move sooner: refinancing is risky
- Consider other factors beyond pure math
Evaluate Trade-Offs
- Shorter term = faster payoff but higher payment
- Longer term = lower payment but more interest
- Cash-out option = convenient but increases total debt
Refinance Formulas
Monthly Payment on New Loan
M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]
(Same formula as original mortgage calculation)
Monthly Savings
Monthly Savings = Current Payment - New Payment
Break-Even Point
Break-Even (months) = Closing Costs / Monthly Savings
Break-Even (years) = Break-Even (months) / 12
Total Lifetime Savings
Total Savings = (Monthly Savings × Total Months Remaining) - Closing Costs
Example: $100 monthly savings, $3,000 closing costs, 20 years remaining
- Break-even: $3,000 / $100 = 30 months (2.5 years)
- Total savings: ($100 × 240 months) - $3,000 = $21,000
Practical Refinancing Examples
Example 1: Rate Drop Makes Refinancing Obvious
Current Mortgage:
- Balance: $250,000
- Rate: 6.5%
- Years remaining: 25
- Monthly payment: $1,650
Refinance Offer:
- New rate: 5.5%
- New term: 25 years (same)
- Closing costs: $4,000
New Mortgage:
- New payment: $1,452
- Monthly savings: $198
Analysis:
- Break-even: $4,000 / $198 = 20.2 months (< 2 years)
- Remaining term: 25 years
- If staying 25 years: $198 × 300 months - $4,000 = $55,400 total savings
- Decision: REFINANCE—break-even in under 2 years with 23+ years of savings remaining
Example 2: Moving Soon Scenario
Current Mortgage:
- Balance: $300,000
- Rate: 6%
- Years remaining: 27
- Monthly payment: $1,799
Refinance Offer:
- New rate: 5%
- New term: 27 years
- Closing costs: $5,500
New Mortgage:
- New payment: $1,610
- Monthly savings: $189
Analysis:
- Break-even: $5,500 / $189 = 29 months (2.4 years)
- If moving in 2 years: No savings (break-even takes 2.4 years)
- If moving in 5 years: $189 × 60 - $5,500 = $5,840 savings
- Decision: WAIT if moving within 2 years; REFINANCE if staying 3+ years
Example 3: Shorter Term Refinance
Current Mortgage:
- Balance: $200,000
- Rate: 4.5% (already good rate)
- Years remaining: 27 (30-year, 3 years paid)
- Monthly payment: $1,013
Refinance Offer:
- New rate: 4.0% (tiny improvement)
- New term: 20 years (shortening loan)
- Closing costs: $3,500
New Mortgage:
- New payment: $1,212
- Monthly change: +$199 (paying MORE!)
- Interest savings: From paying off 7 years early
Analysis:
- Break-even: Not applicable (payment increases!)
- But: Paying off 7 years earlier saves significant total interest
- Total interest old plan: ~$149,000 remaining
- Total interest new plan: ~$89,000
- Savings: $60,000 in interest, own home 7 years earlier
- Decision: REFINANCE if budget allows higher payment; otherwise KEEP
Example 4: ARM to Fixed-Rate Conversion
Current ARM Mortgage:
- Balance: $280,000
- Current rate: 4.5% (ARM, increasing to 6% next year)
- Years remaining: 23
- Monthly payment (current): $1,418
- Payment (projected at 6%): $1,680
Refinance to Fixed:
- New rate: 5.25% (fixed)
- New term: 23 years
- Closing costs: $3,800
New Mortgage:
- New payment: $1,553
- Compared to current: +$135/month
- Compared to projected 6%: -$127/month
Analysis:
- Why refinance despite higher payment? Rate protection
- If rates climb to 7%+, ARM payment climbs further
- Fixed 5.25% protects against future increases
- Break-even: Breaks even around year 3 as ARM increases
- Decision: REFINANCE—trade small near-term increase for long-term rate certainty
Example 5: Cash-Out Refinance Trade-Off
Current Mortgage:
- Balance: $200,000
- Rate: 5%
- Years remaining: 25
- Monthly payment: $1,266
Cash-Out Refinance Offer:
- New loan amount: $240,000 (taking out $40,000 cash)
- New rate: 5.25% (slightly higher rate for cash)
- New term: 25 years
- Closing costs: $4,000
New Mortgage:
- New payment: $1,419
- Monthly increase: $153
Analysis:
- You receive: $40,000 - $4,000 closing costs = $36,000 cash
- For this cash, you pay extra $153/month × 300 months = $45,900 more total
- Cost of $36,000 cash: $45,900 over 25 years
- Equivalent to 4.3% cost of money
- Use cases: Pay off higher-rate credit cards (18%+), or urgent needs
- Decision: ONLY if using cash for something worth the 4.3% effective cost
Key Refinancing Concepts
The Break-Even Analysis
Most important calculation. If break-even > time you'll stay in home, don't refinance. If break-even < 30% of remaining loan term, usually safe to refinance (plenty of years for payoff).
Rate Lock Timing
Rates change daily. Lenders offer rate locks (typically 30-45 days free). Lock in when rates are attractive. Be prepared to close within lock period or rates might change.
No-Cost vs. Paid Refinances
No-cost refi: Lender covers closing costs, you get higher rate (usually 0.5% higher). Good for short-term planning. Paid refi: You pay closing costs, you get better rate. Good for long-term planning.
ARM Adjustments
If on ARM (Adjustable Rate Mortgage), refinancing to fixed-rate when rates are reasonable locks in stability. ARMs reset quarterly/annually, creating payment uncertainty.
Opportunity Cost Consideration
Closing costs could be invested instead. $5,000 invested at 7% grows to $24,000 over 30 years. This is why break-even must be conservative—multiple years of savings needed to justify opportunity cost.
Impact of Interest Rate on $200,000 Mortgage (30 years)
| Rate | Monthly Payment | Total Paid | Total Interest |
|---|---|---|---|
| 5.0% | $1,074 | $386,512 | $186,512 |
| 5.5% | $1,136 | $409,032 | $209,032 |
| 6.0% | $1,199 | $431,639 | $231,639 |
| 6.5% | $1,267 | $456,120 | $256,120 |
| 7.0% | $1,331 | $479,016 | $279,016 |
A 1% higher rate adds roughly $20,000-25,000 in total interest.
When is refinancing a good idea?
Good times to refinance: (1) Rates dropped 1%+ from your current rate; (2) You'll stay in home past the break-even point; (3) You're converting ARM to fixed-rate for stability; (4) You can afford the new payment; (5) Closing costs are reasonable (<3% of loan). Bad times: (1) Rates only dropped 0.25-0.5%; (2) You might move soon; (3) You're near end of loan (refinancing resets clock); (4) Closing costs are high.
How long does a refinance take?
Typically 30-45 days from application to closing. Process: (1) Submit application; (2) Lender gets appraisal and credit report; (3) Underwriting review (1-2 weeks); (4) Clear conditions; (5) Final approval; (6) Closing. Some lenders claim faster (15-21 days), but typical is 30-45. During this time, rate is locked (for a fee if you want extended lock).
What closing costs should I expect?
Typically 2-5% of loan amount: Appraisal ($300-500), title search ($200-300), title insurance ($500-1,000), attorney fees ($500-1,500), loan origination ($200-1,000), points (optional, 0.5-2%). Example: $300,000 refi = $6,000-15,000 closing costs. Can sometimes be rolled into loan (financed) or absorbed by lender (no-cost refi with higher rate).
Should I refinance if rates only dropped 0.25%?
Probably not unless planning to stay 10+ years. $300,000 loan, 0.25% rate drop = $62/month savings. Closing costs of $3,000-5,000 take 50-80 months to recover. Only makes sense for very long-term owners. Exception: If refinancing for term change (30 to 15 years) or type change (ARM to fixed), the break-even math changes.
Can I refinance if I have PMI?
Yes, and refinancing might eliminate PMI! If your home appreciated and equity > 20%, a refinance to a new appraisal might drop PMI. Additionally, if credit improved, you might qualify for better rates. Do the math: PMI elimination + rate drop can make refinancing very attractive. Some lenders offer faster PMI removal after refi.
FAQ
How accurate is this calculator? This calculator provides estimates based on inputs you provide. Actual results may vary based on market conditions and individual circumstances.
Can I rely on this for decisions? Use this as a planning tool, not financial advice. Consult professionals (financial advisor, tax accountant) before major decisions.
What assumptions does this use? Check the methodology section for assumptions. Market rates, inflation, returns, and other factors change and affect accuracy.
Related Calculators
Mortgage Calculator • Mortgage Payoff Calculator • Interest Rate Calculator
Sources & References
- Federal Reserve - Consumer Resources
- CFPB - Consumer Resources
- Federal Trade Commission - Money Matters
Disclaimer
This calculator is provided for educational and informational purposes only. It is not financial, legal, tax, or investment advice. The results are estimates based on the assumptions and inputs you provide.
Actual results may differ significantly due to:
- Changing interest rates and market conditions
- Taxes, fees, and charges not accounted for in the calculation
- Individual circumstances and variables not captured by the calculator
Please consult with a qualified financial advisor, tax professional, or attorney before making any financial decisions. Past performance does not guarantee future results. Always verify important calculations independently before relying on them.
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