Real Estate / Refinance Calculator
🏦 Refinance 🆓 Free 🇺🇸 US Mortgage

🏦 Mortgage Refinance Calculator

Enter your current loan details and new loan terms to instantly see your monthly savings, break-even point, total interest saved, and true net benefit after closing costs. The calculator tells you directly whether refinancing makes financial sense based on how long you plan to stay - not just whether your rate is going down.

🏦 Refinance Calculator

🔴 Current Loan (Existing Mortgage)
🟢 New Loan (Refinance Offer)
💰 Closing Costs & Fees

⚠️ Disclaimer: Estimates only. Consult a licensed mortgage advisor before refinancing.

📊 Side-by-Side Loan Comparison

Metric 🔴 Current Loan 🟢 New Loan Difference
Run the calculator first to see comparison.

📐 How Refinance Calculator Works

Monthly Mortgage Payment Formula

M = P × [r(1+r)ⁿ] / [(1+r)ⁿ − 1] Where: M = Monthly payment P = Principal (loan balance) r = Monthly interest rate (annual rate ÷ 12) n = Number of monthly payments (term in months) Example: $350,000 at 6.5% for 30 years r = 6.5% ÷ 12 = 0.5417% n = 360 months M = $350,000 × [0.005417 × 1.005417³⁶⁰] ÷ [1.005417³⁶⁰ − 1] M = $2,212.24/month

Break-Even Point

Break-Even Months = Total Closing Costs ÷ Monthly Savings Example: Closing Costs = $5,500 Monthly Saving = $200 Break-Even = $5,500 ÷ $200 = 27.5 months (~2.3 years) If you plan to stay longer than 27.5 months → Refinance! If you plan to move sooner → Probably not worth it.

Total Interest Calculation

Total Interest = (Monthly Payment × Term Months) − Principal Current loan total interest = (M_cur × n_cur) − Balance New loan total interest = (M_new × n_new) − Balance Interest Saved = Current Total Interest − New Total Interest Net Benefit = Interest Saved − Closing Costs

When to Refinance - Rules of Thumb

✅ Refinance if: → New rate is at least 0.5–1% lower → You'll stay in the home past break-even point → You want to shorten loan term (15yr vs 30yr) → You want to switch ARM → Fixed rate → You need cash-out for home improvements ❌ Avoid refinancing if: → Moving soon (before break-even) → Resetting to a longer term (e.g. 30yr again) despite lower rate - may pay more total interest → Closing costs too high vs savings → Credit score has dropped significantly

Closing Costs Explained

Typical refinance closing costs: 2–5% of loan balance Common fees: Origination fee: 0.5–1% of loan Appraisal: $300–$700 Title search/ins: $700–$1,500 Recording fees: $100–$500 Points (optional): 1% of loan per point (lowers interest rate) No-closing-cost refi: Costs rolled into rate or balance → Higher rate but no upfront payment → Makes sense if staying short-term

❓ Frequently Asked Questions

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💡 Quick Tips

Rate drop needed≥ 0.5–1%
Typical closing costs2–5%
Good break-even< 24 months
Typical appraisal$300–$700
Origination fee0.5–1%
1 point costs1% of loan
1 point saves~0.25% rate

🔗 Related Calculators

📋 Amortization Schedule 🏡 Home Affordability 💵 Down Payment 📜 Closing Costs

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Refinance Calculator - When Refinancing Makes Sense and When It Doesn't

Refinancing can save tens of thousands of dollars over a loan's lifetime - or cost money if done at the wrong time. The difference usually comes down to one variable: the break-even point. A lower rate always reduces monthly payments, but refinancing involves closing costs that take months or years to recoup. The break-even analysis tells you exactly when the savings begin.

The break-even formula: Break-Even Months = Total Closing Costs ÷ Monthly Payment Savings. Example: closing costs $7,500, monthly saving $187 → break-even = 40 months (3.3 years). If you plan to stay longer than 40 months, refinance. If you're selling in 2 years, refinancing costs more than it saves - even with a significantly lower rate.

Refinancing Scenarios - When It Makes Sense

Strong Case to Refinance

  • Break-even point well inside your remaining tenure
  • Rate drop of 0.75%+ on a large balance ($300K+)
  • Switching from adjustable-rate mortgage (ARM) to fixed before rate resets
  • Removing PMI: if home value rose and you now have 20%+ equity
  • Shortening from 30-year to 15-year and can afford higher payment
  • Cash-out for high-return investments (at careful analysis)

Weak Case to Refinance

  • Planning to sell within 2–3 years (can't break even)
  • Small remaining balance - closing costs are a large % of savings
  • Extending back to 30 years on a nearly-paid loan (total interest cost explodes)
  • Credit score has worsened since original loan
  • Rate drop is marginal (under 0.5%) and closing costs are high
  • Cash-out for depreciating expenses (vacations, cars)

The 1% Rule - Why It's Outdated

Many homeowners have heard "refinance only if the rate drops by at least 1%." This was a reasonable heuristic in the early 2000s when average loan balances were lower and closing costs were proportionally higher. Today it's often wrong in both directions:

  • On a large loan ($500K+): A 0.5% rate drop saves $200–$300/month. With $6,000 in closing costs, break-even is 20–30 months - refinancing is clearly beneficial.
  • On a small remaining balance ($80K, 8 years left): Even a 2% rate drop might only save $70/month. Closing costs of $4,000 take 57 months to recoup - longer than the remaining term.

The only reliable analysis is the break-even calculation using your actual numbers. The calculator above does this precisely.

Mortgage Points - Are They Worth Buying Down?

Discount points allow you to pay extra upfront to get a lower interest rate. One point = 1% of the loan amount, typically reducing the rate by 0.125–0.25% depending on the lender. The decision is the same break-even analysis:

If 1 point costs $3,000 and reduces the rate by 0.25% (saving $50/month on a $300K loan), break-even = 60 months. Worth it if staying 5+ years. Each scenario is different - enter the points cost in the calculator above and it will show the combined break-even including both closing costs and points.

No-Cost Refinancing - The Trade-Off

Some lenders offer "no-cost refinancing" where closing costs are rolled into the loan or offset by a slightly higher interest rate. This removes the upfront cash barrier but has trade-offs:

  • Rolled-in closing costs: Closing costs are added to the loan balance. You pay interest on the closing costs for the life of the loan - a $8,000 closing cost rolled into a 30-year loan at 7% costs approximately $19,200 total.
  • Higher rate in exchange for lender credits: Lender pays closing costs, but gives you a slightly higher rate. You save upfront but pay more monthly. Break-even still applies - calculate whether the higher rate costs more over your remaining tenure than paying closing costs outright.
  • No-cost refinancing makes most sense when you're uncertain about your tenure, when rates might fall further, or when cash-flow is constrained.