Escrow Shortage Calculator: Your New Escrow Payment

When your property tax or insurance bill goes up, your mortgage escrow account can come up short. This escrow shortage calculator estimates the shortage, the cushion your servicer may hold and your new monthly escrow payment, so the letter from your servicer makes sense before your payment changes.

How to use this calculator

1. Yearly property tax. Use your newest tax bill or assessment notice. If taxes rose, enter the new amount, not last year’s.
2. Yearly homeowners insurance. Use the premium on your renewal declarations page.
3. Other escrow bills. Add anything else your servicer pays from escrow, such as flood insurance or mortgage insurance premiums. Enter 0 if there is nothing else.
4. Projected lowest balance. Your escrow analysis shows a month-by-month projection for the coming year. Find the lowest projected balance before any cushion is added. If it is below zero, enter a minus sign.
5. Cushion months. Federal rules allow at most two months. Your statement shows the cushion your servicer actually uses; enter 0 if it holds none.

How this calculator works

The calculator works out what your bills cost per month, sets the cushion as a number of those months, and compares the cushion with your projected low balance.

Yearly bills     = Property tax + Insurance + Other escrow bills
Base monthly     = Yearly bills ÷ 12
Cushion          = Base monthly × cushion months (max 2)
Shortage         = Cushion − projected low balance (if above 0)
Surplus          = Projected low balance − cushion (if above 0)
New monthly      = Base monthly + Shortage ÷ 12

The 12-month spread matches the common way servicers handle a shortage. Federal rules let servicers spread a shortage over at least 12 months (CFPB, 12 CFR 1024.17).

Worked examples

These examples are hypothetical. The tool’s default numbers are examples, not typical bills for your area.

Example 1 (the tool’s defaults): property tax $4,800, insurance $2,400, no other bills, projected low balance $300, cushion 2 months.

• Yearly bills: $4,800 + $2,400 = $7,200.
• Base monthly: $7,200 ÷ 12 = $600.
• Cushion: $600 × 2 = $1,200.
• Shortage: $1,200 − $300 = $900.
• New monthly payment: $600 + $900 ÷ 12 = $600 + $75 = $675.

Example 2 (taxes and insurance both jump): tax rises to $5,400, insurance to $3,000, and the projected low balance is −$200.

• Yearly bills: $8,400, so the base monthly is $700.
• Cushion: $700 × 2 = $1,400.
• Shortage: $1,400 − (−$200) = $1,600.
• New monthly: $700 + $1,600 ÷ 12 = $700 + $133.33 = $833.33.

If instead your projected low balance in Example 1 were $1,500, you would have a $300 surplus and no shortage, and your payment would be the base $600 a month.

What your result means

Your new escrow payment has two parts. The base monthly amount pays this year’s bills and will stay as long as the bills don’t change. The shortage share ($75 a month in Example 1) usually lasts 12 months. After that, your payment may drop, unless bills rise again.

If you have a surplus, you may get a refund check. If you are short, check your escrow statement: some servicers let you pay the shortage in one lump sum, which leaves only the base monthly amount. Your total mortgage payment is principal and interest plus this escrow amount; our mortgage escrow account guide explains each piece.

Rules that change the answer

Federal Regulation X under RESPA sets the main rules (CFPB, 12 CFR 1024.17):

• Cushion cap. The cushion can be no greater than one-sixth of the estimated total yearly escrow payments, which is why this tool limits it to two months.
• Shortage repayment. If the shortage is less than one month’s escrow payment, the servicer may leave it alone, ask for it within 30 days, or spread it over at least 12 months. If it is one month’s payment or more, the servicer may leave it alone or spread it over at least 12 months.
• Surplus refund. A surplus of $50 or more must be refunded within 30 days of the analysis if you are current on your payments.
• Annual statement. The servicer must review the account and send you an annual escrow statement.

Your loan documents or state law can set a smaller cushion. Your local tax rules matter too, since a reassessment or lost exemption can raise the tax bill; see our guide on how property taxes work.

Common mistakes

• Entering last year’s tax bill after a reassessment or a lost exemption.
• Forgetting other escrow bills, such as flood insurance or mortgage insurance.
• Using the current account balance instead of the projected lowest balance.
• Entering a negative low balance as a positive number. That hides the shortage.
• Assuming the shortage part of the payment is permanent. It usually ends after 12 months.

Comparison: shortage, surplus and your payment

Yearly bills of $7,200 and a 2-month cushion of $1,200 in every row (hypothetical).

Limits and when to get help

This is a simplified model. A real escrow analysis projects every month of the year and the exact dates each bill is due, so your servicer’s numbers may differ a little. The tool doesn’t cover deficiencies from bills already paid, partial-year insurance changes, or loans with no escrow account.

If something looks wrong, call your servicer and ask for a copy of the escrow analysis. The CFPB suggests writing to the servicer about errors (CFPB), and you can submit a complaint if it isn’t resolved. If your tax bill seems too high, contact your county assessor about an appeal. For a higher insurance premium, talk with your insurance agent about coverage and deductible options.