Insurers have pushed big rate increases because of losses from natural disasters and rising costs to repair homes. Surging home values in recent years, meanwhile, have lifted property taxes for many homeowners.

These ballooning expenses are rewriting the math of homeownership. In September, 32% of the average single-family mortgage payment went to property taxes and home insurance, the highest rate ever for data going back to 2014, according to Intercontinental Exchange.

The analysis is based on borrowers who use escrow accounts to pay their taxes and insurance as part of their monthly mortgage payments.

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Nationwide, taxes and insurance make up more than half of the monthly mortgage payment for 9% of single-family mortgages. That is up from less than 4% at the end of 2014.