Why Did My Mortgage Payment Change? PITI, Escrow and Shortage Letters
Your mortgage payment changed because the tax and insurance part of it changed, not the loan. On a fixed-rate loan the principal and interest never move, but your servicer collects York County property taxes and homeowners insurance through an escrow account, re-checks that account once a year, and adjusts the payment to match the new bills.
I get this call every winter. Someone's payment jumped $80 or $150, a letter arrived with the word "shortage" in it, and they assume something went wrong. Nothing went wrong. This post walks through the four numbers in a payment, why York County bills make escrow move, and how to read the shortage letter so you can decide whether to pay the lump sum.
What are the four numbers in a mortgage payment?
PITI stands for principal, interest, taxes and insurance, and your monthly payment is all four added together. Principal pays down the balance, interest is the lender's charge, and the last two are not the lender's money at all. The servicer collects one-twelfth of your estimated annual property tax and insurance premium every month, holds it in escrow, and pays those bills when they come due. Federal escrow rules (RESPA, 12 CFR 1024.17) cap the monthly escrow collection at one-twelfth of the expected annual disbursements, plus a cushion of no more than one-sixth of that annual total, which is two months' worth.
Why does my lender escrow my York County taxes and insurance?
Because an unpaid tax bill becomes a lien that outranks the mortgage, lenders would rather pay it themselves. In York County you get two rounds of real estate bills a year: the county and municipal bills are mailed around February 15, and the school district bills go out around July 1. The school bill is the big one. Under a 2026-2027 millage of 25.6861 mills for Dallastown Area, versus 7.55 for the county and 1.40 for York Township, roughly three-quarters of a York Township homeowner's property tax goes to the school district. Your servicer pays each bill inside the discount period, and the CFPB notes that if you do not carry escrow and stop paying taxes or insurance yourself, the servicer can force-place insurance at a higher cost and set up an escrow account anyway.
Why did my fixed-rate payment go up?
Because the servicer ran its annual escrow analysis and found that next year's taxes and insurance will cost more than this year's collection. Under 12 CFR 1024.17 the servicer must analyze the account at the end of every escrow computation year and send you an annual statement within 30 days. If the school district raised millage, the county raised its rate, or your insurer raised the premium, the projected disbursements go up and the monthly escrow portion rises with them. That is the whole story behind most payment increases on fixed-rate loans.
What does the escrow shortage letter mean, and should I pay the lump sum?
A shortage means the account ended the year with less in it than the rules require, usually because last year's bills came in higher than the estimate. The letter is not a missed payment and not a collection notice. Here is a worked example using 2026-2027 numbers for a York Township home in the Dallastown Area School District:
| Item | Last year's estimate | This year's actual |
|---|---|---|
| Property tax (assessed $151,000 at 34.6361 combined mills) | $5,230 | $5,530 |
| Homeowners insurance | $1,400 | $1,600 |
| Annual escrow need | $6,630 | $7,130 |
| Monthly escrow (annual divided by 12) | $552.50 | $594.17 |
The account came up $500 short last year, and the new monthly escrow is $41.67 higher. Under the federal rule, a shortage of one month's escrow payment or more must be offered as equal monthly installments over at least 12 months; here that is another $41.67 a month. So the payment rises by $83.33 for 12 months, then drops back by $41.67 once the old gap is repaid. Paying the $500 lump sum only removes that second $41.67. It does not stop the first one, because next year's bills are simply higher. If the account has a surplus of $50 or more instead, the servicer has to refund it within 30 days.
How do I check the escrow analysis for mistakes?
Compare the two numbers the servicer projected against the bills you can see yourself. Pull your parcel on the York County assessment site and multiply the assessed value by your municipality's combined millage from the county's 2026-2027 millage list; that should match the tax line. Then compare the insurance line to your policy's declarations page. The classic error is a double insurance payment in the year you switched carriers, which shows up as an inflated projection. If the insurance number is what jumped, that is your cue to re-shop the policy.
See the real monthly payment
Principal, interest, York County taxes and insurance together, the way your lender will quote it.
Open the mortgage calculatorOr call or text Phil directly: 717-356-9413.
Questions people ask
Can I get rid of escrow and pay taxes myself?
Some lenders allow it on conventional loans once you have enough equity, and some charge a fee for the waiver. Ask your servicer in writing what its rules are, and remember you would then owe the February and July bills in lump sums.
What is the difference between a shortage and a deficiency?
A shortage means the balance is positive but below the required level. A deficiency means the account actually went negative because the servicer paid a bill with money that was not there yet. Both get repaid the same way, spread over at least 12 months if they equal a month's escrow or more.
Why is my escrow cushion so large?
The cushion is capped at one-sixth of the annual disbursements. On $7,130 a year that is $1,188. If the servicer is holding more than that at the low point of the year, ask for an explanation.
If a letter arrived with numbers that do not add up, send me a photo of it. I read these all the time and it takes two minutes to translate. Call or text me at 717-356-9413. This is general information, not legal or tax advice.
