Cash-out Refinance Calculator
Reviewed by Hamza Gujjar, Algorithm Architect & Software Developer
Last updated: August 20, 2026Refinancing to Pull Cash Out, Not Just to Lower a Rate
A standard refinance replaces one mortgage with another at a better rate or term. A cash-out refinance does that too, but borrows more than the existing balance and hands the owner the difference in cash — funding renovations, debt consolidation, or anything else, secured against the home's equity rather than an unsecured loan. The tradeoff is a larger loan balance and, usually, a reset amortization clock.
The Formula
Cash Out = New Loan Amount − Current Mortgage Balance − Closing Costs
Lenders cap the new loan at a maximum loan-to-value ratio (commonly 80% for conventional cash-out refinances), which limits how much equity can actually be converted to cash regardless of how much equity exists on paper.
Where This Calculation Matters
- Funding a renovation without a separate loan — rolling renovation costs into a single first-mortgage rate is often cheaper than a personal loan or credit card.
- Consolidating higher-interest debt — replacing credit card or personal loan balances with mortgage-rate debt can cut total interest paid, though it converts unsecured debt into debt secured by the home.
- Comparing against a HELOC — a cash-out refinance replaces the whole mortgage at one rate, while a HELOC layers a separate, often variable-rate line on top of the existing mortgage; the right choice depends on the rate spread between the two.
- Checking feasibility before applying — running the LTV cap against current equity shows immediately whether enough cash-out capacity exists to justify the closing costs of a full refinance.
A Worked Example
A $450,000 home with a $220,000 current mortgage balance, refinancing to 80% LTV with 2% closing costs:
| Item | Amount |
|---|---|
| New loan amount (80% of $450,000) | $360,000.00 |
| Closing costs (2% of new loan) | $7,200.00 |
| Current mortgage balance paid off | $220,000.00 |
| Cash out to owner | $132,800.00 |
| New monthly payment (6.75%, 30 yrs) | $2,334.95 |
How to Use This Calculator
- Enter Current Home Value and Current Mortgage Balance.
- Adjust Max LTV % if your lender's cap differs from the 80% default.
- Enter Closing Cost % (defaults to 2%) for the new loan.
- Enter the New Interest Rate and New Loan Term for the refinanced mortgage.
- Select Calculate to see the cash-out amount and the new monthly payment.
Related Calculations
Check available equity before refinancing with the Home Equity Calculator, or compare against a line of credit instead using the HELOC Calculator.
Principles of Cash-Out Mortgage Refinancing and Equity Extraction
A cash-out refinance calculator computes the net cash proceeds, new monthly mortgage payment, closing costs, and financial break-even timeline when replacing an existing home loan with a larger mortgage to liquidate accumulated home equity. In personal real estate finance, cash-out refinancing provides low-interest capital for high-ROI home renovations, high-interest credit card consolidation, or real estate investment.
The Fundamental Cash-Out Refinance Formulas
Net Cash Payout to Borrower = Maximum New Loan - Existing Mortgage Balance - Total Closing Costs
Refinance Break-Even Period (Months) = Total Out-of-Pocket Closing Costs / Monthly Savings
Cash-Out Refinance vs. HELOC vs. Home Equity Loan
| Financing Feature | Cash-Out Refinance | Home Equity Line of Credit (HELOC) | Home Equity Loan (HELOAN) |
|---|---|---|---|
| Lien Position | Replaces Primary 1st Mortgage | Subordinate 2nd Mortgage Lien | Subordinate 2nd Mortgage Lien |
| Interest Rate Type | Fixed Rate (30 or 15 Years) | Variable Rate (Tied to Prime Rate) | Fixed Rate (5 to 30 Years) |
| Closing Costs | 2.0% to 4.0% of Total Loan ($6,000 to $12,000) | Low or Zero Upfront Costs ($0 to $500) | Low Closing Costs ($500 to $1,500) |
| Primary Risk | Resets 30-year amortization clock; loses existing low primary mortgage rate | Payment shock when draw period ends; rate hikes | Higher fixed interest rate than primary mortgage |
IRS Tax Rules on Cash-Out Refinance Interest Deductibility
Under IRS Publication 936, mortgage interest on cash-out funds is tax-deductible only if the proceeds are spent on capital home improvements. Using cash-out funds to eliminate student loans or purchase vehicles makes that portion of mortgage interest non-deductible.
Step-by-Step Worked Calculation Example
Example: Liquidating Home Equity on a $600,000 Property
Problem: A home is appraised at $600,000. Current first mortgage balance = $320,000. The lender approves a new 30-year fixed cash-out refinance at 80.0% LTV. Closing costs equal 2.50% of the new loan amount. Calculate: (1) Maximum new loan amount; (2) Total closing costs; and (3) Net cash check received by homeowner at closing.
Step 1: Calculate Maximum New Loan Amount (80% LTV):
New Loan = $600,000 × 0.80 = $480,000.00
Step 2: Calculate Closing Costs (2.5% of $480,000):
Closing Costs = $480,000 × 0.025 = $12,000.00
Step 3: Calculate Net Cash Proceeds Paid Out to Homeowner:
Net Cash = $480,000 (New Loan) - $320,000 (Payoff Existing Loan) - $12,000 (Closing Costs)
Net Cash Payout = $480,000 - $332,000 = $148,000.00 Cash in Hand
Conclusion: The homeowner accesses $148,000 in liquid cash while consolidating all debt into a single primary mortgage.
Fannie Mae & Freddie Mac Cash-Out Seasoning Requirements
Conventional conforming mortgage underwriting guidelines mandate strict Title Seasoning Rules before a homeowner can extract cash equity:
- 6-Month Ownership Rule (Fannie Mae): At least 6 months must elapse between the property's original purchase date and the new cash-out refinance note date.
- 12-Month Delayed Financing Exception: If the original home was purchased with 100% liquid cash, the buyer can refinance immediately up to the original purchase price.
- VA Cash-Out Refinance (Veterans): Requires a minimum of 210 days seasoning and 6 full monthly mortgage payments made on the previous loan.
Debt-to-Income (DTI) Underwriting Caps
Mortgage underwriters evaluate the borrower's total monthly debt payments (new mortgage principal, interest, taxes, insurance + auto loans + student debt) divided by gross monthly income, strictly capping maximum DTI at 43.0% to 50.0%.
Loan-Level Price Adjustments (LLPAs) on Cash-Out Refinancing
Fannie Mae and Freddie Mac assess mandatory Loan-Level Price Adjustments (LLPAs) on cash-out refinances (typically adding a 0.375% to 1.750% upfront pricing fee or higher interest rate) due to the higher statistical default risk of equity extraction.
Appraisal Contingency and Low Valuation Pitfalls
If an independent certified residential appraiser values the property lower than expected, the maximum allowable 80.0% loan amount shrinks proportionately.
Borrowers must either reduce their cash-out withdrawal request or provide documented recent neighborhood comparable home sales to petition the lender for an appraisal reconsideration of value (ROV).
Private Mortgage Insurance (PMI) Avoidance Thresholds
By restricting cash-out refinance borrowing to a maximum 80.0% Loan-to-Value (LTV), homeowners avoid mandatory monthly Private Mortgage Insurance (PMI), saving $150 to $300 per month in unnecessary lender fees.
Escrow Account Balance Transfers
Remaining escrow funds from the previous mortgage are refunded via paper check within 30 days post-closing.