Many people who took out home-equity lines of credit (Heloc) loans, which became popular in the run-up to the housing bust, are having trouble making their payments, reports Annamaria Andriotis of The Wall Street Journal.

Helocs allow borrowers to withdraw cash from their house to pay for renovations, college tuition, or almost any other expense. These loans typically require interest-only payments for the first 10 years, but then principal payments kick in for the next 15 or 20 years.

About 840,000 Helocs that were taken out in 2006 are resetting this year in addition to principal payments on nearly one million loans expected to hit in 2017.

Borrowers who signed up for Helocs in early 2006 were at least 30 days late on $2.8 billion of balances four months after principal payments kicked in this year, according to Equifax. That represents 4.4% of the balances on outstanding 2006 Helocs. Delinquencies were at 2.9% before the reset.

Resets can lead to payments jumping by hundreds, or in some cases thousands, of dollars a month.

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