How a home equity loan works
A home equity loan — sometimes called a "second mortgage" — lets you borrow a one-time lump sum against the equity in your home while keeping your existing first mortgage exactly as it is. You repay it at a fixed interest rate in equal monthly installments over a set term, so the payment never changes. That predictability is the main reason homeowners choose it over a variable-rate HELOC.
How much you can borrow is limited by your combined loan-to-value (CLTV) — the total of all loans against the home divided by its value — which lenders usually cap at 80–85%. This calculator applies that cap, subtracts your current balance, and amortizes the result at your rate and term.
The formula
Two calculations drive a home equity loan:
Loan available = (home value × max CLTV) − current balance
Monthly payment = the loan amount, amortized at your fixed rate over your term
Worked example
Your home is worth $400,000, you owe $250,000, and the CLTV cap is 85%. The maximum total of loans allowed is $400,000 × 0.85 = $340,000; subtract the $250,000 you owe and you could borrow about $90,000. Take that $90,000 at a 7.5% fixed rate over 15 years and your payment is roughly $834/month — and it stays there for the life of the loan, while your original mortgage keeps its own rate and payment.
Home equity loan vs. HELOC vs. cash-out refinance
All three tap your equity, but they behave very differently:
| Option | How you get the cash | Rate | Effect on your mortgage |
|---|---|---|---|
| Home equity loan | One fixed lump sum | Fixed | Keeps it; adds a 2nd payment |
| HELOC | Revolving line, draw as needed | Variable | Keeps it; adds a credit line |
| Cash-out refinance | Lump sum; replaces your mortgage | Fixed (whole balance) | Replaces it entirely |
For the full breakdown, read cash-out refinance vs. home equity loan.
How to qualify for a home equity loan
- Credit score — usually 620+ to qualify, with the best rates above 700.
- Equity remaining — most lenders require you to keep 15–20% equity after the loan (the CLTV cap).
- Debt-to-income — total monthly debts typically under about 43% of gross income.
- Verified income and value — pay stubs or tax returns, plus an appraisal or automated valuation.
What a home equity loan costs
Closing costs are usually far lower than a cash-out refinance because they're based on the smaller second-loan amount — often 2–5% of the loan, and some lenders (like Discover) waive origination and appraisal fees entirely. There's no rate risk once you close, since the rate is fixed. Watch for any early-repayment fees before signing.
When a home equity loan makes sense
It's the right tool when your current mortgage rate is low and worth keeping, you need a single, known lump sum (a renovation, debt consolidation, a major expense), and you want the certainty of a fixed payment. If you'd rather borrow flexibly over time, compare a HELOC; if today's rates are at or below your current rate, a cash-out refinance may be cheaper overall.
Frequently asked questions
How much can I borrow with a home equity loan?
What is a home equity loan?
How is it different from a HELOC?
What credit score do I need?
Sources: CFPB — Home equity loans and HELOCs · CFPB Owning a Home · our methodology.