Your monthly mortgage payment in late September 2026 sits on a 30-year fixed rate that averaged 7.03% — and on a $400,000 loan that means roughly $2,669 a month in principal and interest alone (True Home Payment). That headline number is only half the story. The two costs that move silently inside your payment — property taxes and homeowners insurance — have risen faster than anyone expected, so the price you see on a listing tells you almost nothing about what you'll actually write a check for each month.
What does your monthly payment actually include?
Your payment is built on the acronym PITI — Principal, Interest, Taxes, and Insurance — and only the first two are fixed by your rate and loan amount. Principal is what you borrow back down, and interest is the cost of borrowing it. Both are set the day you lock your rate. Taxes and insurance, by contrast, are living numbers that a lender folds into your escrow account each month and pays on your behalf, which means they can climb from one year to the next even when your mortgage payment never changes.
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