HELOC vs Second Mortgage: They're Not Actually Alternatives

The HELOC's biggest structural risk isn't the variable rate — it's the transition from the draw period to the repayment period.

On a $50,000 draw at 8.5% with a 10-year draw period and 20-year repayment:

That's a 23% jump — and it's the mild version, because the repayment period here is long. A shorter repayment period, a larger balance, or a rate rise makes it considerably sharper. A borrower who has paid $354 a month for a decade without the balance moving can be badly caught out.

Home equity loans typically carry a slightly higher rate than HELOCs at origination — but the comparison is misleading, because you're comparing a fixed rate against a variable one at a single moment in time.

A HELOC's rate is usually prime plus a margin, and it moves whenever prime moves. A HELOC quoted below a home equity loan today can sit above it in two years. If the certainty of a fixed payment matters to your budget, the home equity loan's slightly higher starting rate is buying you something real.

Some lenders offer a fixed-rate option on a HELOC, letting you lock a portion of the drawn balance at a fixed rate. That's a genuine middle ground worth asking about, though terms vary and some lenders charge for the conversion.

Both a HELOC and a home equity loan must be repaid when you sell the home. The lien is on the property, and the title can't transfer clear with it outstanding.

In practice this happens automatically at closing: the settlement agent pays off both your first mortgage and the second lien from the sale proceeds, and you receive what's left. Two things to know:

• An open HELOC must be closed, not just paid to zero. A zero balance doesn't release the lien — the line has to be formally closed and the lien released. Start this early, because it can take weeks and a delay here can hold up your closing.
• Check for early closure fees. Some HELOCs charge a fee if you close the line within the first few years. It's usually modest, but it's better discovered now than on your settlement statement.

If you owe more on both loans combined than the sale will produce, you're in a short sale situation, which requires both lenders' agreement. That's a materially different process worth professional advice.

Is a HELOC the same as a second mortgage?

A HELOC is a second mortgage. "Second mortgage" describes lien position — any loan secured by your home sitting behind your primary mortgage. Both HELOCs and home equity loans qualify. When people compare "HELOC vs second mortgage" they usually mean HELOC vs home equity loan.

Is a HELOC better than a home equity loan?

Neither is universally better. A home equity loan gives a fixed rate, fixed payment and a lump sum — better when you know exactly what you need. A HELOC gives a revolving line at a variable rate where you only pay interest on what you draw — better when the amount is uncertain or spread over time.

Does a HELOC count as a second mortgage on a mortgage application?

Yes. Lenders count it as a lien against the property and factor the payment into your debt-to-income ratio. An open but undrawn HELOC can also affect underwriting, since the available credit represents potential debt — disclose it rather than assuming a zero balance means it doesn't count.

What happens to a HELOC when you sell your house?

It's repaid from the sale proceeds at closing, alongside your first mortgage. Important detail: the line must be formally closed and the lien released, not merely paid to zero. Start that process early, since it can take weeks and hold up your closing.

What is payment shock on a HELOC?

The jump when the interest-only draw period ends and the balance begins amortizing. On a $50,000 draw at 8.5% with a 10-year draw and 20-year repayment, the payment rises from $354.17 to $433.91 — about 23%. Shorter repayment periods, larger balances or rate rises make it considerably sharper.

Is interest-only cheaper on a HELOC?

Only in the short term. Paying interest-only for ten years on a $50,000 draw at 8.5% costs $42,500 while the balance stays at $50,000. Across both phases you'd pay about $8,234 more in total interest than amortizing the same amount from day one. Interest-only defers cost rather than reducing it.