HELOC vs. mortgage: what's the difference?

Both are secured by your home. One buys the house; the other lets you borrow against what you've already paid off.

Reviewed by Shawn Way, NMLS #1007298★ 4.9 from 111 reviewsUpdated October 28, 2026

HELOC vs. mortgage at a glance

Lien position: why a HELOC is often a "second mortgage"

Both loans are secured by your home, and either lender can foreclose if you stop paying. The difference is order. Your purchase mortgage is normally recorded first; a HELOC opened later is recorded behind it as a second lien. In a foreclosure or sale, the first lender is paid before the second. On a home with no mortgage, a HELOC can be the first lien. More in is a HELOC a second mortgage?

Revolving vs. installment, variable vs. fixed

A mortgage gives you the full amount once, and you repay it on a set schedule. Your payment on a fixed-rate loan doesn't change, apart from taxes and insurance held in escrow.

A HELOC works more like a credit card secured by your house. You're approved for a limit, draw what you need, pay interest only on what you've drawn, and can reuse the line as you repay it during the draw period. Most HELOCs are variable: when the prime rate moves, your rate moves with it, subject to any caps in your agreement. Some lenders let you lock part of a balance at a fixed rate; see fixed-rate HELOCs.

Rates and costs

HELOC rates are typically higher than first-mortgage rates because the lender is in second position and the loan is smaller and more flexible. As of October 28, 2026, prime is 7.00%, and typical HELOC APRs run about 7.25%–8.75% for borrowers with 760+ credit and 8.00%–9.75% APR around 720. Why the gap exists is covered in why HELOC rates are higher than mortgage rates.

The trade-off runs the other way on closing costs. A mortgage usually involves an appraisal, title insurance, origination charges and other fees. HELOCs often cost much less to open, and some lenders absorb most costs, though watch for annual fees or early-closure fees. See HELOC closing costs.

Example: $60,000 for a remodel

Illustrative numbers. You own a $500,000 home with a $300,000 mortgage at 3.5% and need $60,000 for a kitchen.

Option 1: cash-out refinance. You replace the mortgage with a new $360,000 loan. If the new rate were 6.5%, your entire $360,000 balance would carry that rate, not just the $60,000, and you'd pay full mortgage closing costs.

Option 2: HELOC. You keep the 3.5% mortgage and open a $60,000 line. Your CLTV is ($300,000 + $60,000) ÷ $500,000 = 72%, within the usual 80%–85% cap. At 7.75% APR, interest-only on the full $60,000 is about $4,650 a year, or roughly $388 a month, and you only pay interest on what you've drawn so far.

When your first-mortgage rate is well below today's rates, adding a HELOC usually beats replacing the whole loan. Compare both with the HELOC vs. cash-out calculator.

When to use each

Use a mortgage to buy a home, to refinance when you can lower your rate on the whole balance, or when you want a single fixed payment for decades. See our mortgage and loan programs.

Use a HELOC when you already have a mortgage you want to keep, need money in stages or for an uncertain amount, or want a line available for emergencies. It fits projects and debt payoff better than long-term financing of the home itself. Remember the rate can rise, and payments usually increase when the draw period ends.

Questions people ask

Is a HELOC better than a mortgage?

Neither is better in general; they do different jobs. A mortgage finances the purchase of a home, while a HELOC lets you borrow against equity you've built without replacing your first loan.

Can a HELOC replace a mortgage?

Yes, a HELOC can replace a mortgage. Some people use a first-lien HELOC to pay off their mortgage, but the variable rate then applies to the whole debt. See paying off a mortgage with a HELOC.

Can you have a mortgage and a HELOC at the same time?

Yes, that's the most common setup. The HELOC sits behind the mortgage as a second lien, and lenders limit your combined balances to about 80%–85% of the home's value.

Why is a HELOC rate higher than my mortgage rate?

The HELOC lender is paid second in a foreclosure, the loan is smaller, and the line is flexible, so it carries more risk. Your mortgage rate may also have been locked when rates were lower.

Is HELOC interest tax-deductible like mortgage interest?

Only sometimes. HELOC interest is deductible like mortgage interest only if you itemize and use the money to buy, build or substantially improve the home that secures the line. See HELOC interest and taxes.

To see your own numbers, get your HELOC rate from Shawn. Your home secures any HELOC or mortgage, rates can change, and this is general information, not an offer to lend.

More in HELOC guides

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• HELOC vs. home equity loan
• HELOC vs. reverse mortgage
• HELOC vs. 401(k) loan
• HELOC vs. credit card
• Paying off your mortgage with a HELOC
• HELOC or home equity loan for debt consolidation?
• Paid-off home: HELOC or cash-out refinance?

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