Second Mortgage vs. Home Equity Loan
A home equity loan is a type of second mortgage — but not every second mortgage is a home equity loan. Understanding the umbrella term versus the product keeps comparison shopping honest.
Quick answer
A “second mortgage” is any loan secured by your home behind your first mortgage; a “home equity loan” is the lump-sum, fixed-rate kind of second mortgage. The other common kind is a HELOC — a revolving credit line. All three use your home as collateral. Estimate borrowing capacity with the home equity loan calculator.
Side-by-side comparison
| Feature | Home equity loan (lump sum) | HELOC (line of credit) | Other second mortgages |
|---|---|---|---|
| How funds arrive | Single lump-sum disbursement | Draw as needed up to a limit during the draw period | Varies — e.g. piggyback purchase loans taken alongside a first mortgage |
| Interest rate | Usually fixed for the life of the loan | Usually variable, tied to a published index plus margin | Fixed or variable depending on product |
| Monthly payment | Fixed payment, fully amortizing | Interest-only or flexible during draw; amortizes in repayment period | Per loan terms |
| Best for | One-time expenses with a known cost (addition, debt consolidation) | Ongoing or phased costs (multi-stage renovation, tuition over semesters) | Specific situations like avoiding PMI at purchase |
| Lien position | Second lien behind the first mortgage | Second lien behind the first mortgage | Second (or piggyback) lien |
How much can you borrow?
Most lenders cap total liens around 80–85% of appraised value: maximum new loan equals home value times the CLTV cap minus the current mortgage balance. Enter your figures in the home equity loan calculator to see the ceiling and the payment. Rate context: there is no single official national benchmark — the home equity rate benchmarks page links CFPB guidance on pricing.
Risks both carry
- Foreclosure risk. Any second mortgage is secured by your home — missed payments can lead to foreclosure even if the first mortgage is current.
- Closing costs and fees. Origination, appraisal, and recording fees apply; compare the APR disclosures, not headline rates.
- Over-borrowing. Tappable equity is not a recommendation — borrow against a payment you can sustain if income dips.
Worked example: $400,000 home, $240,000 first mortgage
At an 85% CLTV cap, total liens may reach $340,000 — leaving up to $100,000 in borrowable equity. Taken as a lump-sum home equity loan, that $100,000 arrives at closing with a fixed amortizing payment you can budget exactly. Taken as a HELOC, the same $100,000 becomes a credit limit: draw $30,000 for phase one, pay interest only on the drawn amount, and keep the rest available. Either way the combined monthly housing debt is the first-mortgage payment plus the new second-lien payment — verify the total fits your debt-to-income ratio with the DTI calculator before signing.
Shopping checklist
- Compare APRs, not headline rates — the APR folds in origination and closing fees.
- Ask about prepayment terms — some second liens carry early-closure fees, especially HELOCs closed within a few years.
- Confirm appraisal mechanics — full appraisal, drive-by, or automated valuation each imply different costs and timelines.
- Check subordination policy — if you later refinance the first mortgage, the second-lien holder must agree to stay second; confirm the lender’s process upfront.
Frequently asked questions
Is a home equity loan the same as a second mortgage?
A home equity loan is one kind of second mortgage — the lump-sum, fixed-rate kind. HELOCs and piggyback purchase loans are other kinds of second mortgages.
How much equity can I borrow?
Most lenders cap total liens around 80–85% of appraised value: max new loan = value × CLTV cap − current balance. The home equity loan calculator computes it from your figures.
Does a second mortgage affect my first mortgage?
No — the first mortgage keeps its rate and terms. But total monthly housing debt rises, which future lenders count in your debt-to-income ratio.
Is the interest tax-deductible?
It can be when the funds substantially improve the securing residence, subject to IRS rules and limits. Consult a tax professional — this page is educational, not tax advice.
What happens if I sell with a second mortgage outstanding?
Both liens are repaid from the sale proceeds at closing — the first mortgage first, then the second. Remaining equity goes to you.
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Cite this page
LoanMatchers Editorial Team. “Second Mortgage vs. Home Equity Loan.” https://loanmatchers.com/learn/second-mortgage-vs-home-equity-loan/. Accessed 2026-09-10.
Sources
- Consumer Financial Protection Bureau — Ask CFPB — Consumer Financial Protection Bureau — consumerfinance.gov
- HUD — single-family mortgage insurance and homeownership — U.S. Department of Housing and Urban Development — hud.gov
Benchmarks are national averages from the publishers above, not offers. See our methodology.
Not financial advice. LoanMatchers is not a lender. Rates and terms vary by lender and creditworthiness. This page provides general educational information, not financial advice — consult a qualified professional before making financial decisions.
By the LoanMatchers Editorial Team. Last updated 2026-09-10. Educational information only — not financial advice.