Estimate how much you may be able to borrow from your home, your monthly payment, and your projected total interest. This tool uses a fixed-rate home equity loan model.
How this mortgage home equity loan calculator works
A home equity loan lets you borrow against the value you have built in your property. In simple terms, equity is your home value minus what you still owe on your mortgage. Lenders usually cap borrowing with a combined loan-to-value ratio (CLTV), such as 80% or 85%.
This calculator estimates:
- Your maximum available equity based on CLTV limits
- Your approved loan amount (requested amount or max available, whichever is lower)
- Your monthly payment for a fixed-rate loan
- Total interest over the full loan term
- Net cash after estimated closing costs
Formula used for payment calculation
Monthly payment is calculated using the standard amortizing loan formula:
Payment = P × r ÷ (1 − (1 + r)-n)
- P = loan principal
- r = monthly interest rate (APR ÷ 12)
- n = total number of monthly payments
If your interest rate is 0%, payment is calculated as principal divided by number of months.
What to know before borrowing against home equity
1) Your house is collateral
Unlike unsecured borrowing, your home secures the loan. Missing payments can create serious financial risk, including foreclosure in extreme cases.
2) CLTV limits control borrowing power
Even if your credit and income are strong, lenders typically cap total borrowing (first mortgage + home equity loan) at a percentage of appraised value. A lower CLTV limit means lower available funds.
3) Rates can vary significantly
Home equity loan rates depend on market rates, credit score, debt-to-income ratio, and lender policy. A small APR difference can materially impact total interest over 10–20 years.
4) Fees reduce net proceeds
Appraisal, title, recording, and origination fees may reduce how much cash you actually receive. Always compare offers using both APR and out-of-pocket costs.
Example scenario
Suppose your home is worth $500,000, your mortgage balance is $300,000, and lender max CLTV is 80%.
- Max total debt allowed: $500,000 × 80% = $400,000
- Estimated max home equity loan: $400,000 − $300,000 = $100,000
- If you request $90,000, at 8.25% for 15 years, this tool computes monthly payment and total interest automatically.
When a home equity loan may make sense
- Large, one-time expenses (major renovation, debt consolidation plan with discipline, education)
- You prefer fixed payments and a fixed interest rate
- You can comfortably handle payment at today’s rates
When to be cautious
- Income is unstable or emergency savings are low
- You are borrowing for non-essential discretionary spending
- You may move soon and won’t keep the loan long enough to offset fees
Tips to improve your loan terms
- Improve credit score before applying
- Pay down revolving debt to lower debt-to-income ratio
- Request quotes from multiple lenders and compare total cost, not just payment
- Ask about lender credits and fee waivers
Important note
This mortgage home equity loan calculator is for educational estimates only. It does not include taxes, insurance, prepayment penalties, or lender-specific underwriting rules. Always confirm final numbers with your lender or financial advisor before making decisions.