What This Calculator Does
A cash-out refinance replaces your existing mortgage with a new, larger loan — allowing you to borrow against the equity you've built in your home. The difference between your old balance and the new loan amount is paid to you in cash at closing. Unlike a home equity loan (which adds a second lien), a cash-out refinance consolidates everything into a single mortgage with one monthly payment. For example, if your home is worth $500,000 and you owe $250,000, you have $250,000 in equity. With a cash-out refinance, you might take a new $300,000 loan and receive $50,000 in cash (minus closing costs). Most lenders require you to retain at least 20% equity after the refinance, meaning you can typically borrow up to 80% of your home's appraised value.
How It Works
The calculator performs a comprehensive side-by-side comparison of your current mortgage against the proposed new loan. Here's what it analyzes: **Dual Input Modes:** You can enter either your remaining balance directly, or your original loan details (amount, term, rate, and years since origination). In the second mode, the calculator automatically computes your current remaining balance using standard amortization formulas. **APR Calculation:** Unlike the simple interest rate, the Annual Percentage Rate (APR) includes the cost of discount points and closing fees, giving you the true cost of borrowing. The calculator uses Newton's method to solve for the APR iteratively. **Break-Even Analysis:** If the new loan lowers your monthly payment, the calculator divides total upfront costs (points + fees) by the monthly savings to determine how many months until you recoup those costs. This is critical for deciding whether refinancing makes sense given how long you plan to stay in your home. **Lifetime Cost Comparison:** The calculator projects total payments over each loan's remaining term, including closing costs, to show whether you'll save money overall — not just month to month.
Why It Matters
Cash-out refinancing is one of the cheapest ways to access large sums because mortgage rates are significantly lower than personal loan or credit card rates. Common uses include: • **Home improvements** that increase property value (kitchen remodels, additions) • **Debt consolidation** — replacing 20%+ credit card debt with a 6-7% mortgage rate • **Major expenses** like college tuition, medical bills, or starting a business • **Investment opportunities** where expected returns exceed the mortgage rate However, it's crucial to understand the risks. You're converting unsecured debt into debt secured by your home. If you can't make payments, you could face foreclosure. Additionally, extending your loan term — say from 20 remaining years back to 30 — can result in paying significantly more total interest, even at a lower rate. The 2024-2025 rate environment has made cash-out refinancing particularly interesting for homeowners who locked in low rates during 2020-2021. If current rates are higher than your existing rate, you need to carefully weigh whether the cash-out benefits justify the higher monthly payment and total interest cost.
Current loan
New refinance loan
Your new monthly payment (P&I)
$2,398.20
6.000% rate · 30-year term· 80% LTV
Cash in your pocket
$50,000
Monthly savings
-$351.80/mo
Rate reduction
7.500% → 6.000%
Break-even
1.5 years
Closing costs
$6,000
Savings, if any, vary based on consumer credit profile, interest rate availability, and other factors.
Insights
Your Cash-Out Funds
Break-Even Analysis
Lower Rate Benefit
Default rates: Federal Reserve Economic Data (FRED), Freddie Mac Primary Mortgage Market Survey
How Cash-Out Refinance Is Calculated
The calculator performs a comprehensive side-by-side comparison of your current mortgage against the proposed new loan. Here's what it analyzes: Dual Input Modes: You can enter either your remaining balance directly, or your original loan details (amount, term, rate, and years since origination). In the second mode, the calculator automatically computes your current remaining balance using standard amortization formulas. APR Calculation: Unlike the simple interest rate, the Annual Percentage Rate (APR) includes the cost of discount points and closing fees, giving you the true cost of borrowing. The calculator uses Newton's method to solve for the APR iteratively. Break-Even Analysis: If the new loan lowers your monthly payment, the calculator divides total upfront costs (points + fees) by the monthly savings to determine how many months until you recoup those costs. This is critical for deciding whether refinancing makes sense given how long you plan to stay in your home. Lifetime Cost Comparison: The calculator projects total payments over each loan's remaining term, including closing costs, to show whether you'll save money overall — not just month to month.
New Loan = CurrentBalance (or computed remaining balance) + CashOut NewPayment = NewLoan × r(1+r)^n/((1+r)^n−1) Upfront Cost = Points%×NewLoan + Fees APR solved via Newton's method: finds rate r such that Payment×(1−(1+r)^−n)/r = NewLoan − UpfrontCost Lifetime Savings = CurrentTotalPayments − (NewTotalPayments + UpfrontCost) Break-even months = UpfrontCost / (CurrentPayment − NewPayment) Where: r = monthly rate, n = term in months. Assumptions: Monthly compounding; APR estimation via iterative Newton's method (200 iterations, clamped 0.0001%-5%/month) treating points+fees as financed cost reducing net proceeds; equity/LTV warnings use user-entered home value, not an appraisal.
Key Takeaways
- •Most lenders require at least 20% equity remaining after the cash-out — meaning you can borrow up to 80% of your home's current appraised value (loan-to-value ratio of 80% or less).
- •Cash-out refinance rates are typically 0.125% to 0.5% higher than standard rate-and-term refinance rates. Factor this into your comparison.
- •Using cash-out proceeds for home improvements can be doubly beneficial: you may deduct the mortgage interest on your taxes AND increase your home's value.
- •Compare the total cost of a cash-out refinance vs. a HELOC or home equity loan. HELOCs have lower closing costs but variable rates, while a cash-out refi offers a fixed rate.
- •A credit score of 740+ typically qualifies you for the best rates. If your score is below 700, consider improving it before applying — even a 0.25% rate difference saves thousands over the loan's life.
- •Don't reset a nearly paid-off mortgage to 30 years without running the numbers. Shortening the new term to 15 or 20 years often provides better long-term value despite higher monthly payments.
- •Closing costs on a cash-out refinance typically run 2-5% of the new loan amount. Some lenders offer 'no-closing-cost' refinances by rolling fees into the rate — but this increases your APR.
- •The IRS allows mortgage interest deductions on up to $750,000 of qualified mortgage debt. Cash-out proceeds used for home improvements qualify, but cash used for other purposes may not.
Related Calculators
Should I refinance my mortgage?
Compare your current mortgage to a new loan to see if refinancing makes financial sense. Calculate your break-even point and total savings.
Should I get a HELOC or cash-out refinance?
Compare a HELOC to a cash-out refinance to see which option costs less based on your situation, interest rates, and how long you need the funds.
What will my monthly mortgage payment be?
Calculate your monthly mortgage payment including principal, interest, taxes, and insurance. Understand exactly what you'll pay each month.