HELOC in 2026: Borrow Against Your Home and Keep Your Mortgage Rate

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What a HELOC is, and why it keeps your rate

A home equity line of credit, or HELOC, lets you borrow against your home equity as a revolving line of credit, much like a credit card, but secured by your house. The key advantage over a cash-out refinance is that a HELOC is a second lien: it sits behind your first mortgage and leaves it completely untouched. That means your existing mortgage and its interest rate stay exactly where they are, which matters enormously if you locked in a low rate.

HELOC versus a home equity loan

People often confuse a HELOC with a home equity loan, but they work differently. A HELOC is a revolving line with a usually variable rate, where you draw what you need and often pay interest only at first. A home equity loan hands you one lump sum at a fixed rate, with principal and interest from day one. Choose a HELOC for ongoing or uncertain costs, and a home equity loan for a single known expense.

How much you can actually borrow

Your borrowing power comes down to your combined loan-to-value, or CLTV: your first mortgage plus the new line, divided by your home's value. Most lenders cap CLTV near eighty to eighty-five percent, and some go to ninety. So on a four-hundred-thousand-dollar home with two hundred thousand still owed, an eighty-five percent cap leaves room for a line of roughly one hundred forty thousand dollars, before fees and approval.

The two phases: draw period and repayment

A HELOC runs in two stages. During the draw period, commonly about ten years, you can borrow, repay, and borrow again up to your limit, and many lenders let you pay interest only. Then the line closes to new borrowing and the repayment period begins, often around twenty years, when you pay back both principal and interest. Understanding this split is the difference between a HELOC that helps and one that hurts.

The payment-shock trap

Here is the part borrowers most often underestimate. When the draw period ends, your payment can jump sharply, because you shift from interest-only to full principal and interest, sometimes at the same time a variable rate has climbed. A payment that felt comfortable for ten years can suddenly rise by hundreds of dollars a month. Plan for that increase before you ever draw a dollar.

What it takes to qualify

Lenders weigh three things: your equity, your credit, and your ability to repay. You generally need meaningful equity, with combined loan-to-value at or below about eighty to eighty-five percent, a credit score in the mid-six-hundreds or higher for approval, and a manageable debt-to-income ratio that proves you can handle the higher repayment-period payment. Stronger credit unlocks better terms.

Is the interest tax-deductible?

Sometimes, but not the way many people assume. Under current IRS rules, interest on a HELOC is deductible only if you use the funds to buy, build, or substantially improve the home that secures the loan. Use the money for a car or to consolidate other debt, and the interest is not deductible. Tax situations vary, so confirm the rules in IRS Publication 936 and with a tax professional.

The real pros and cons

On the plus side, a HELOC is flexible, you pay interest only on what you draw, it usually costs less than unsecured borrowing, and it preserves your first-mortgage rate. On the downside, the rate is usually variable so payments can rise, the payment can jump when repayment begins, and because your home is the collateral, missed payments put it at risk of foreclosure. This is borrowing with your house on the line.

How to get one and compare

Start by estimating your equity: subtract your first-mortgage balance from your home's value to see your room under an eighty to ninety percent cap. Confirm your credit and that your budget can absorb a higher payment later. Then compare lenders carefully, not just on the headline rate but on the margin over the index, the fees, the draw and repayment terms, and whether you can convert part of the balance to a fixed rate.