Before entering into a plan, consider how you will pay back any money you might borrow. Some plans set minimum payments that cover a portion of the principal (the amount you borrow) plus accrued interest. But, unlike the typical installment loan, the portion that goes toward principal may not be enough to repay the debt by the end of the term. Other plans may allow payments of interest alone during the life of the plan, which means that you pay nothing toward the principal. If you borrow $10,000, you will owe that entire sum when the plan ends.

Regardless of the minimum payment required, you can pay more than the minimum and many lenders may give you a choice of payment options. Consumers often will choose to pay down the principal regularly as they do with other loans. For example, if you use your line to buy a boat, you may want to pay it off as you would a typical boat loan.

Whatever your payment arrangements during the life of the plan--whether you pay some, a little, or none of the principal amount of the loan--when the plan ends you may have to immediately pay the entire outstanding balance. You must be prepared to make this balloon payment by refinancing it with the lender, by obtaining a loan from another lender, or by some other means. If you are unable to make the balloon payment, you could lose your home.

With a variable rate, your monthly payments may change. Assume, for example, that you borrow $10,000 under a plan calling for interest-only payments. At a 10 percent interest rate, your initial monthly payments would be eighty-three dollars. If the rate should rise over time to 15 percent, your monthly payments would increase to $125. Even with payments that cover interest plus some portion of the principal, there could be a similar increase in your monthly payment, unless the agreement allowed keeping payments level throughout the plan.

When you sell your home, you probably will be required to pay off your home equity line in full. If you are likely to sell your house in the near future, consider whether it makes sense to pay the up-front costs of setting up an equity credit line. Also keep in mind that leasing your home may be prohibited under the terms of your home equity agreement.