Most mortgage payments are not just principal and interest. Lenders commonly require an escrow account — sometimes called an impound account — that collects a portion of your property tax and homeowners insurance bill every month, holds it, and pays those bills on your behalf when they come due. If your monthly payment has ever gone up without your loan balance or rate changing, an escrow adjustment is almost always the reason.
How the Monthly Amount Gets Calculated
The lender estimates your annual property tax and insurance premium, divides that total by twelve, and adds it to your principal-and-interest payment. Because property taxes are reassessed periodically and insurance premiums renew annually, this estimate is not fixed. When your county reassesses your home's value and the tax bill rises, or your insurer raises the premium at renewal, the escrow portion of your payment increases to match, usually the following year rather than immediately.
Escrow Shortages and Surpluses
Once a year, the lender reconciles what it collected in escrow against what it actually paid out. If the account came up short — because taxes rose faster than the estimate assumed — you typically get billed for the shortage, either as a lump sum or spread across the next twelve months of payments, which is why a mortgage payment can jump noticeably at the annual review even without a rate change. A surplus works the other direction: if the account collected more than it needed, federal rules generally require the lender to refund the excess above a small cushion, or apply it toward the following year, depending on the size of the surplus and the loan type.
Why Lenders Require It
Escrow protects the lender's collateral. An unpaid property tax bill can result in a tax lien that takes priority over the mortgage itself, and a lapsed insurance policy leaves the home uninsured against the kind of loss that would otherwise wipe out the lender's security. Requiring escrow removes the risk that a borrower skips a tax or insurance payment, intentionally or by oversight, and it is standard on most loans with less than 20 percent down, similar to how private mortgage insurance protects the lender on low down payment loans.
Can You Opt Out?
Depending on the loan type and how much equity you have, some borrowers can waive escrow and pay taxes and insurance directly instead. Conventional loans sometimes allow this once loan-to-value drops below a certain threshold, often 80 percent, sometimes for a small fee or a slightly higher rate. Government-backed loans, including FHA loans, generally require escrow for the life of the loan with no opt-out. Waiving escrow shifts the responsibility — and the discipline of setting aside the money yourself every month — entirely onto you, which only makes sense if you are confident you will actually save that portion of the payment rather than spend it.
Reading Your Annual Escrow Statement
Once a year your servicer sends a statement showing the projected tax and insurance costs for the coming year, the new monthly escrow payment, and any shortage or surplus from the prior year. This is worth reading line by line rather than filing away, because it is the clearest signal of whether your local tax assessment or your insurance premium is the driver behind a payment increase — information that matters if you are deciding whether to appeal a tax assessment or shop for a new insurance policy at renewal. The Consumer Financial Protection Bureau outlines the specific rules lenders must follow on escrow shortage notices and surplus refunds.
What to Do If You Disagree With the Reassessment
A jump in the tax portion of the escrow payment is not automatically correct just because it appears on an official notice. Local assessors periodically revalue properties in batches, and errors in square footage, comparable sales, or property condition are common enough that most counties maintain a formal appeal process with a filing deadline, usually a matter of weeks after the assessment notice goes out. Reviewing the assessment against recent comparable sales in the neighborhood before the escrow adjustment locks in, rather than after several months of higher payments have already gone by, is the only way to catch an error early enough for an appeal to actually reduce the following year's bill rather than the one after that.
An escrow account is not an extra fee on top of your mortgage — it is a mechanism for paying two bills you would owe regardless, tax and insurance, in smaller monthly pieces instead of large annual lump sums. Understanding how the annual recalculation works removes the surprise when the payment shifts and helps you catch a tax assessment or insurance increase before it compounds into a bigger shortage the following year.