Refinance Calculator
Compare your existing mortgage against a refinanced loan to calculate monthly savings, lifetime interest reduction, break-even period, points, and closing costs.
Refinance Calculator
The refinance calculator can help plan the refinancing of a loan given various situations, and also allows the side-by-side comparison of the existing or refinanced loan.
• Input your current remaining loan balance, current payment, and interest rate in the Current Loan panel.
• Configure the new term, interest rate, discount points, closing fees, and optional cash-out equity in the New Loan panel.
• Review the side-by-side payment variance, lifetime interest reduction, break-even period, and trajectory chart.
Current Loan
New Refinanced Loan
Refinancing saves you $77,890.55 in total lifetime costs!
Break-even period: 729 months (~60.8 years to recoup closing costs)
Comprehensive Side-by-Side Comparison
| Metric | Current Loan | Refinanced Loan | Difference / Impact |
|---|---|---|---|
| Monthly Payment | $1,800.00 | $1,791.08 | -$8.92 / mo |
| Interest Rate | 7.00% | 6.00% | -1.00% |
| Total Loan Term / Remaining | 23 yrs, 10 mos | 20 yrs, 0 mos | 46 months shorter |
| Total Interest Paid | $264,249.19 | $179,858.64 | -$84,390.55 |
| Upfront Closing Costs & Points | $0.00 | $6,500.00 | +$6,500.00 |
| Net Overall Savings | — | — | Save $77,890.55 |
Cumulative Cost & Break-Even Trajectory
Cumulative cash outflow comparisonWhat is Loan Refinancing & When Does It Make Sense?
Refinancing involves replacing an existing debt obligation with a new loan under updated terms, interest rates, or borrowing structures. Borrowers commonly refinance mortgages, auto loans, and student debt to lower monthly payments, reduce total interest, or unlock accumulated equity.
Rate-and-Term Refinance
The most common strategy: lowering your annual percentage rate (e.g., from 7.0% down to 6.0%) or adjusting duration (e.g., 30-year to 15-year) to accelerate equity building.
The Break-Even Rule
Always ensure you plan to stay in the home longer than the break-even period ($ClosingCosts / \Delta PMT$). If fees are $6,000 and you save $200/month, you break even in 30 months.
Cash-Out Refinancing
Borrowing a larger principal than your remaining balance to extract cash for home improvements, high-interest debt consolidation, or major investments.
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Understanding Refinance Calculator & Formula
The Refinance Calculator on CalculatorScale.com is engineered to deliver instant, mathematically verified calculations conforming strictly to standard institutional equations. Whether planning long-term investments, managing household budgets, tracking clinical fitness targets, analyzing academic genetics, calculating veterinary dosages, or converting dimensional units, every calculation updates dynamically in real time without lag.
Every formula used in this tool adheres to certified international standards, including World Health Organization biometric metrics, veterinary clinical guidelines, NIST physical conversion constants, and standard biological equations. Results are computed entirely client-side inside your browser with complete data privacy, ensuring your sensitive numbers and statistics never leave your device.
Our calculators are 100% free with no registration, subscriptions, or paywalls required. You can toggle between imperial and metric units, customize input parameters, export calculation summaries, or embed this calculator directly into your own website or blog.
How to Use the Refinance Calculator
- 1 In the "Current Loan" panel, enter your remaining balance ($), monthly payment ($), and current interest rate (%), or switch to original loan info to auto-derive remaining principal.
- 2 In the "New Loan" panel, specify the proposed loan term (years), new interest rate (%), discount points (%), closing fees ($), and optional cash-out equity ($).
- 3 Click "Calculate" to generate the side-by-side comparison table, monthly payment variance, net lifetime savings, and break-even payoff timeline.
- 4 Review the interactive trajectory chart to inspect cumulative cash outflows and the exact break-even crossover date.
Refinance Calculator — Frequently Asked Questions
Q1 What is the "Break-Even Period" in mortgage refinancing? ▾
The break-even period is the number of months it takes for your monthly payment savings to equal the total upfront closing costs (fees and discount points). For example, if closing costs are $6,000 and you save $200 per month, your break-even point is 30 months (2.5 years).
Q2 When does it make financial sense to refinance a mortgage? ▾
Refinancing typically makes sense if you can lower your interest rate by 0.75% to 1.00% or more, shorten your loan term to save on total interest, switch from an adjustable-rate mortgage (ARM) to a stable fixed rate, eliminate private mortgage insurance (PMI), and plan to stay in the property past the break-even period.
Q3 What is the difference between rate-and-term refinance and cash-out refinance? ▾
A rate-and-term refinance changes only the interest rate and/or loan duration without changing the principal balance. A cash-out refinance borrows a larger amount against built-up home equity, paying off the original mortgage and distributing the remaining cash difference to the homeowner.
Q4 What are discount points and should I pay them? ▾
One discount point costs 1% of the loan amount and typically lowers your interest rate by approximately 0.25%. Paying points makes sense if you intend to keep the loan for many years, allowing the ongoing monthly interest savings to far outweigh the upfront cash cost.
Q5 What fees are included in mortgage refinancing closing costs? ▾
Refinancing closing costs generally range from 2% to 5% of the loan principal and include lender origination fees, home appraisal, title search and title insurance, credit report fees, recording fees, and prepaid interest and escrow reserves.
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