By ALEX VEIGA
AP Business Writer

Rising home values and low interest rates are a powerful combination for homeowners looking for more financial breathing room.

The trend, fueled by the two-year housing recovery, has helped spur many borrowers to take out a home equity line of credit against the value of their home.

Such a loan, also known as a “HELOC,” can give borrowers more financial flexibility and typically at a lower interest rate than a credit card. But HELOCs can also pose risks, should interest rates rise sharply or home values plummet.

When the housing market crashed in late 2007 it wiped out the equity many borrowers had in their home, prompting lenders to slash their available credit. Others overextended themselves financially, assuming home prices would continue to rise and boost their ability to use borrow more money against their equity.

That’s not deterring many homeowners from using a portion of their homes’ value as a piggy bank. Available credit extended via HELOCs to U.S. homeowners jumped 27 percent to $120 billion in the 12 months ended June 30, according to Experian Decision Analytics data.

“It’s important to think about whether the payments are affordable and whether it’s worth putting the equity in your house at risk,” said Debbie Goldstein, executive vice president at the Center for Responsible Lending.

Here are five tips to help determine whether a HELOC is right for you.

1. KNOW THE BASICS

Home equity lines of credit essentially function like a credit card or a traditional line of credit. Borrowers can tap a portion of their available credit, pay it off, and use it again for the term of the credit line or draw period, which is typically 10 years.

After that, any unpaid balance converts to a loan that must be repaid over a predetermined period, typically 10-20 years. In some cases, a lender will require payment in full at the end of the draw period.

One key benefit HELOCs have over standard bank loans that are not secured by real estate is borrowers can deduct their interest payments on balances up to $100,000 against their tax liability.

2. CONSIDER THE INTEREST RATE

Because the terms of HELOCs can vary, it’s essential to understand how interest rates will be applied on your loan.

Beyond determining the length of the draw period and starting interest rate, you’ll want to know whether the terms of the loan include payment in full at the end of the draw period, and how much time, if any, you’ll have to pay back the balance.

Lenders generally base the starting interest rate on HELOCs on the prime rate. Look for lenders that offer to cap that prime rate over the life of the loan, which will protect against a spike as rates fluctuate over the draw period.

Interest rates on HELOCs have been trending lower this year. The average now is around 4.87 percent, according to Bankrate.com. That’s based on a $30,000 line of credit with a combined loan-to-value ratio of 80 percent. The loan-to-value ratio is determined by weighing how much a borrower would owe on home loans against what the property is worth.

Many economists predict loan rates could go higher beginning next year, when the Federal Reserve is expected to start raising interest rates.

3. DON’T ASSUME YOU’LL QUALIFY

Having equity in your home doesn’t automatically qualify you for a HELOC.

Expect that lenders will want to review your credit and income history going back a couple of years, as well as a couple of months of bank statements.

“They’re going to look at your ability to have saved, your ability to have cash reserves,” said Cyndee Kendall, regional mortgage sales manager at Bank of the West. “Do you have the wherewithal to pull from savings to make a payment if need be.”

The size of your credit line will also depend on how much equity you have relative to any other mortgages on the property. This is assessed by determining your combined loan-to-value ratio.

It’s generally calculated by adding what you currently owe on your mortgage with the proposed credit line amount, then dividing that total by the home’s current appraised value.

For example, someone who owes $200,000 on their mortgage, wants a $30,000 HELOC and whose home is valued at $350,000, would have a combined loan-to-value ratio of 65.7 percent.

Most lenders won’t approve HELOCs where the borrower’s combined loan-to-value ratio is above 80 percent, though some go as high as 90. Ideally, borrowers need at least 20 percent equity, said Mike Kinane, retail lending senior product manager at TD Bank.

4. WEIGH THE RISKS

Relying on a fixed-rate loan to pay back the balance of a HELOC years into the future means you won’t know what that rate is for many years and could end up paying significantly more over time.

“That (rate) will be whatever the market rate is at that moment 10 years from now,” Kendall said.

5. CONSIDER ANOTHER OPTION

If you need funds that you know you won’t be able to pay off within a couple of years, consider a home equity loan, said Kevin Meehan, certified financial planner at Wealth Enhancement Group.

Such loans also tap home equity, but generally come with a fixed principal and interest payment. This eliminates the potential shock payment risk of a variable interest rate.

“Instead of accessing a HELOC, if you have debt elsewhere, it might be the better long-term decision to roll it all together … where you have longer to pay it off with no interest rate risk,” Meehan said.