Refinance Calculator
Analyze mortgage refinancing benefits
Calculate actual savings from refinancing by comparing interest savings against prepayment fees. Use this to decide whether to refinance when rates drop.
🔄 What is Refinancing?
Refinancing means replacing your current loan with a new one at a lower rate. Consider refinancing when rates drop 0.5%+ below your current rate. However, factor in prepayment fees, stamp duty, and registration costs to determine actual benefit.
🏠 Mortgage Calculator
Monthly Payment
$1.5K
Total Payment
$547.2K
Total Interest
$247.2K
82.4% of principal
📊 Principal vs Interest
Principal
$300.0K
Interest
$247.2K
📅 Payment Schedule
| Year | Annual Payment | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | $18,240.67 | $4,839.68 | $13,400.99 | $295.2K |
| 2 | $18,240.67 | $5,062.01 | $13,178.66 | $290.1K |
| 3 | $18,240.67 | $5,294.56 | $12,946.11 | $284.8K |
| 4 | $18,240.67 | $5,537.79 | $12,702.88 | $279.3K |
| 5 | $18,240.67 | $5,792.20 | $12,448.47 | $273.5K |
| 6 | $18,240.67 | $6,058.29 | $12,182.38 | $267.4K |
| 7 | $18,240.67 | $6,336.61 | $11,904.06 | $261.1K |
| 8 | $18,240.67 | $6,627.71 | $11,612.96 | $254.5K |
| 9 | $18,240.67 | $6,932.19 | $11,308.48 | $247.5K |
| 10 | $18,240.67 | $7,250.65 | $10,990.02 | $240.3K |
| ... Total 30 years | ||||
💰 Interest Rate Comparison
| Rate | Monthly | Total Interest | Difference |
|---|---|---|---|
| 3.5% | $1,347.13 | $185.0K | -$62.3K |
| 4.0% | $1,432.25 | $215.6K | -$31.6K |
| 4.5% | $1,520.06 | $247.2K | +$0.0 |
| 5.0% | $1,610.46 | $279.8K | +$32.5K |
| 5.5% | $1,703.37 | $313.2K | +$66.0K |
Mortgage Calculation Result
Monthly $1.5K
✨ Total interest $247.2KLoan $300.0K, 4.5% rate, 30 years
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Important Note
This calculator is for reference only. Actual loan terms may vary based on lender, credit score, and collateral value. Contact your financial institution for accurate information.
📐 Refinance Benefit Calculation
Interest Savings = (Old Rate - New Rate) × Balance × Remaining Term
Refinance Cost = Prepayment Fee + Stamp Duty + Registration
Net Benefit = Interest Savings - Refinance Costs
📝 How to Calculate
- Enter current loan balance and rate
- Enter remaining loan term
- Enter new loan rate
- Check prepayment fee rate (typically 1.4-1.5%)
- Compare total savings vs costs
📊 Refinance Simulation ($250K balance, 20yr remaining)
| Rate Reduction | Annual Savings | 20yr Total | Prepay Fee(1.5%) | Net Benefit |
|---|---|---|---|---|
| 0.5%p | $1,250 | $25,000 | $3,750 | $21,250 |
| 1.0%p | $2,500 | $50,000 | $3,750 | $46,250 |
| 1.5%p | $3,750 | $75,000 | $3,750 | $71,250 |
| 2.0%p | $5,000 | $100,000 | $3,750 | $96,250 |
💡 Refinance Checklist
- Consider refinancing when rate difference is 0.5%+
- Check prepayment fee waiver period (usually after 3 years)
- Larger balances mean greater refinance benefits
- Longer remaining terms mean more interest savings
- Good credit score can negotiate lower rates
❓ FAQ
Typically 1.4-1.5% of balance within 3 years of the loan. Many banks waive fees after 3 years. Contact your bank for exact fees.
Loan inquiries may temporarily lower your score slightly, but since you're paying off existing debt, overall impact is minimal.
Yes, you can request a rate reduction from your current bank. This often avoids prepayment fees while lowering your rate.
📚 Local Method & Assumption Guide
Formula Logic
Core formulas use public finance, loan, ratio, and unit conversion standards.
Source Scope
References follow publicly available standards and country-level common practices.
Assumptions
Taxes, fees, rates, and limits vary by region and institution.
Result Interpretation
Use this result as a baseline scenario. For decisions, compare with your lender quote and local tax treatment.
Locale Preset
Currency: USD
Units: imperial
Tax logic: US payroll estimate
Regulatory Note
This tool uses regional presets for estimation. Contract terms and legal limits may differ by lender, bank, or local law.
Recommended Next Actions
- Compare at least 2-3 local providers before final submission.
- Re-check fees, tax treatment, and prepayment clauses in writing.
- Run a stress scenario with +1-2% interest and lower income.
Before a real financial decision, confirm with local institution rules.