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Mortgage Escrow Accounts: How Escrow Analysis Works

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A fixed-rate payment can still change when taxes or insurance rise, and an escrow analysis sets the new deposit.

Published: 2026-10-19

Key takeaways

  • On a fixed-rate loan, principal and interest stay the same. Taxes and insurance inside escrow can still move the total draft.
  • Regulation X caps the cushion at one-sixth of estimated annual escrow disbursements. The monthly deposit is generally one-twelfth of what the servicer expects to pay.
  • A surplus of $50 or more goes back to a borrower who is current within 30 days. A smaller surplus can be refunded or credited to next year.
  • A shortage is a balance below the target. A deficiency is a negative balance. Repayment choices depend on the size of the gap.

Published: 2026-10-19

A fixed-rate mortgage keeps principal and interest steady, and the escrow portion of the payment can still change. The Consumer Financial Protection Bureau says property taxes and insurance premiums can change from year to year, and the escrow payment and the total monthly payment change with them.

The yearly analysis resets that deposit and labels any shortage, surplus, or deficiency.

Why can a fixed payment still change?

The CFPB loan-choice guide says fixed-rate principal and interest stay the same, while taxes, homeowners insurance, or mortgage insurance can still change the total. The payment explainer says the amount you send is often higher than principal and interest because it includes insurance and taxes. Escrow, sometimes called an impound account, collects that money so the servicer can pay the bills. When a bill rises, the escrow deposit rises with it. See the pieces on the take-home PITI page and the lines on the bill in how to read your mortgage statement.

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What does the annual analysis do?

Under 12 CFR 1024.17, an escrow analysis is the calculation the servicer uses to set the next deposits and to decide whether a shortage, surplus, or deficiency exists. Servicers must use aggregate accounting, which looks at the whole account.

The servicer runs an analysis before the account is opened and again at the end of each escrow computation year. The annual statement, with the account history and next year's projection, goes out within 30 days after that year ends. When escrow is a condition of the loan, the initial statement is due at settlement or within 45 days.

If the servicer knows next year's charge, it uses that amount. If the charge is unknown, it may use last year's charge, or last year's charge changed by no more than the most recent year's change in the national Consumer Price Index for all urban consumers.

The cushion may not exceed one-sixth of estimated total annual disbursements. State law or the mortgage documents can require a smaller cushion. Each month the servicer may collect one-twelfth of the annual escrow payments it reasonably expects, plus enough to maintain that cushion.

At closing, the servicer may also collect an opening deposit. The CFPB's escrow-limit answer says that amount is limited so the account does not go negative, plus a cushion of up to two months of estimated charges. Price that cash-to-close piece in the closing cost calculator.

What do shortage, surplus, deficiency, and cushion mean?

A shortage is the amount by which the current balance falls short of the target balance for the remaining bills, counting payments still to come and any cushion. A deficiency is a negative balance, often because the servicer advanced its own money. If that advance was not caused by a payment default, the servicer must analyze the account before it seeks repayment. A surplus is the amount by which the current balance exceeds the target. The cushion is part of the target.

If the borrower is current, a surplus of $50 or more must be refunded within 30 days. A surplus under $50 may be refunded or credited to next year's deposits. A borrower is current when the servicer receives the payment within 30 days of the due date. A later payment lets the servicer keep the surplus under the loan documents.

If a shortage is under one month's escrow payment, the servicer may leave it, require repayment within 30 days, or spread it over at least 12 months. If it is one month or more, the servicer may leave it or spread it over at least 12 months. The CFPB servicing FAQ says those options are exclusive, so the annual statement may not require a lump sum for a large shortage. The servicer may still accept a voluntary lump sum.

If a deficiency is under one month's escrow payment and the borrower is current, the servicer may leave it, require repayment within 30 days, or require two or more equal monthly payments. If it is one month or more, the servicer may leave it or require two or more equal monthly payments. The servicer must tell the borrower at least once during the year if a shortage or deficiency exists. That notice can sit on the annual statement.

How does a tax or insurance increase show up?

The dollars below are an illustration of the rule, not a servicer statement and not a quote.

Start with $3,600 a year in property taxes and $1,800 a year in homeowners insurance. Estimated disbursements are $5,400. One-twelfth is $450 a month. The cushion cap is one-sixth of $5,400, which is $900.

Next year the tax bill is $4,200 and the insurance premium is $2,040. Estimated disbursements are $6,240. One-twelfth is $520. The cushion cap is $1,040.

Suppose the analysis finds a shortage of $780. That is larger than one month of the $520 deposit, so the 12-month path is one of the two choices the rule allows. Spread over 12 months, $780 is $65 a month. During that catch-up year the illustrated escrow deposit is $520 plus $65, or $585. Principal and interest are untouched.

If the same analysis found an $80 surplus and the borrower was current, the servicer would refund $80 within 30 days, because $80 is at least $50. A $40 surplus could be refunded or applied to next year's deposits.

Principal and interest, which this analysis does not change, go in the mortgage calculator. A lump-sum principal payment is a different step, covered in mortgage recast versus refinance. If the draft changes and the tax or insurance bill did not, contact the servicer. The CFPB escrow-problem answer points to unpaid taxes and force-placed insurance, and a notice of error is the written dispute if a bill was missed.

Read the next annual statement against the tax bill and the insurance bill. The calculators and guides on this site handle the payment math.

This article is educational and is not a loan offer or financial advice.

Sources

Frequently asked questions

Does a fixed rate lock the whole house payment?

No. It locks principal and interest. Taxes, insurance, and mortgage insurance collected with the payment can still change the total.

How often is the account reviewed?

At setup and at the end of each escrow computation year. The annual statement is due within 30 days after that year ends.

Can the cushion exceed two months of bills?

Not under Regulation X. The cap is one-sixth of estimated annual disbursements, and state law or the mortgage documents can set a lower cap.

Do I have to pay a large shortage in one check?

No. When the shortage is at least one month's escrow payment, the annual statement may spread it over at least 12 months or leave it in place. You may still send a voluntary lump sum.

What if the servicer paid a bill and the account went negative?

That is a deficiency. The servicer analyzes the account before it collects an advance that was not caused by a payment default.