Why Your Mortgage Payment Changed: Escrow, Explained

Every year I get a version of the same phone call, usually from someone who closed on a new home about eighteen months earlier. They have a fixed rate mortgage. Their payment just went up by three or four hundred dollars a month. They want to know how that is legal.

It is legal, it is not a mistake, and on a new build it is close to inevitable. Here is what happened.

Your payment has four parts and only two are fixed

The industry shorthand is PITI: principal, interest, taxes and insurance.

Principal and interest are locked by your note. On a thirty-year fixed loan they will be the same in year twenty-nine as they were in month one.

Taxes and insurance are not part of your loan at all. They are bills the lender collects from you monthly and pays on your behalf out of an escrow account. When those bills change, your payment changes, and your fixed rate has nothing to say about it.

How the account is supposed to work

The servicer estimates your annual property tax and homeowners insurance, divides by twelve, and adds that to your payment. It is allowed to hold a modest buffer on top, capped by federal rule at one-sixth of your estimated annual disbursements. That works out to two months when the bills are evenly spaced, which is where the “two month cushion” shorthand comes from.

Once a year the servicer runs an escrow analysis, compares what it collected against what it actually paid, and adjusts. You are entitled to a written statement of that analysis within thirty days of the end of the computation year. It is the most useful piece of mail your servicer sends you and most people file it unread.

Why new construction gets hit hardest

This is the part that matters, and it is not the servicer’s fault.

County assessors value property as of a fixed date each year. If your house was a bare lot or a partially framed shell on that date, the tax bill for that cycle reflects a bare lot or a partial shell. It does not matter that a finished house stands there by the time you close.

So at closing, your lender sizes your escrow from the only tax bill that exists, which is the land bill. Federal rules permit a servicer to estimate from comparable properties instead, but most use the last actual bill because it is the defensible number.

Then the next assessment date arrives, the assessor puts the finished house on the roll, and the bill goes from land value to house value. That is not a small adjustment. It can be several times the number your escrow was built around.

You take two hits at once

When the analysis runs, you are short in two ways.

1. A shortage. The account underfunded for the year that just passed and has to be made whole.
2. A higher ongoing monthly amount, because next year’s bill will be at the new level from day one.

Both land on the same statement, which is why the jump feels so violent. The shortage can generally be spread over at least twelve months rather than demanded at once, and it is worth asking for that if the lump sum is uncomfortable.

Worth knowing the vocabulary, because the two words get used interchangeably and they are not: a shortage means your balance is below target but still positive. A deficiency means the account has gone negative. Deficiencies can be called back faster.

The three other reasons your payment moves

Your insurance premium went up

Homeowners insurance has been rising, and the increase flows straight through escrow into your payment. This is the one line you can actually shop. Get quotes every couple of years and tell your servicer when you switch.

Oregon’s assessment caught up

Oregon limits how fast assessed value grows on an existing home. That protection does not extend to new construction or significant improvements, which get reappraised and brought onto the roll at market value. The result is that new homes see a sharper early correction than the neighbours in the older subdivision down the road.

A levy or bond passed

School bonds, fire districts, library levies. Voters approve them and they appear on the next bill. I wrote about how the whole Oregon system fits together in the property tax guide.

What to do about it

Before you close on a new build, ask your loan officer one question: is my escrow being sized on the land assessment or on the finished home? If the answer is land, ask what the payment will look like once the house is assessed. A good lender will run that estimate for you. Then budget to that number, not to the first-year number, and treat the difference as temporary breathing room rather than income.

Ask whether builder incentive dollars can prepay escrow. Closing cost credits are flexible, and funding your escrow account above the minimum is a legitimate use of them. Almost nobody asks. It is one of the more practical things you can do with a credit, and I go through the rest of the menu in the builder incentives post.

When the analysis arrives, read it. Check the tax figure against your actual county statement and the insurance figure against your actual policy. Servicers do make errors, and the only way anyone catches one is by comparing the two documents.

If you get a surplus, that is your money. Surpluses of fifty dollars or more must be refunded within thirty days.

Should you waive escrow?

Some lenders will let you handle taxes and insurance yourself, often for a fee or a slightly higher rate, and usually only with a meaningful down payment.

You keep the float and you control the timing, which in Oregon means you could pay the full year by November 15 and take the 3% discount. On a $6,000 bill that is $180 a year for doing nothing but paying early, which is a better return than the account was earning anyway.

The tradeoff is discipline. You now have to set aside several hundred dollars a month yourself and have the whole tax bill ready in November. If that is genuinely how you operate, waiving is reasonable. If it is aspirational, keep the escrow account. A missed property tax payment is a much worse problem than a payment that moves once a year.

If you are looking at a new build and want to know what your payment actually settles at rather than what it starts at, ask me and I will get you the real estimate. You can also run a first pass yourself on the payment calculator.