Why Did My Austin Mortgage Payment Go Up? Escrow Shortages Explained
Usually it’s your escrow account, not your loan. Your property taxes and homeowners insurance are estimated at closing, often from the seller’s last tax bill. That bill may reflect exemptions or a lower taxable value you don’t inherit. When the real bills come in, your servicer’s annual escrow analysis finds a shortage, and your payment rises for two reasons:
- Higher ongoing escrow: to cover the higher taxes and insurance going forward.
- Shortage repayment: to make up what the account came up short.
The federal limits: under 12 CFR 1024.17, your servicer’s cushion can’t exceed one-sixth of the year’s estimated escrow payments (about two months), and your servicer can’t require you to repay a shortage of one month’s escrow payment or more in less than 12 months. There’s no federal right to pay a shortage in a lump sum, but you can ask your servicer whether it accepts one.
Reviewed by Dustin Edwards, Principal, NMLS 577050 | Last updated October 19, 2026
I’ve worked in mortgage lending for 22 years. The escrow letter that shows up about a year after closing surprises many homeowners. Here’s what’s happening and what you can do about it.
The short answer
- Your principal and interest on a fixed-rate loan don’t change. Your escrow does.
- Year one in Texas is often short because the estimate used the seller’s taxes, exemptions and insurance.
- Federal rules limit the cushion your servicer can hold and how it can collect a shortage.
How escrow works on a Texas mortgage
Most Texas mortgages include an escrow account. Each month, part of your payment goes into it, and your servicer uses it to pay your property taxes and homeowners insurance when they’re due.
Federal rules (12 CFR 1024.17(c)) let your servicer collect one-twelfth of the yearly amount it expects to pay out, plus a cushion of no more than one-sixth of the estimated total annual payments from the account. The cushion covers surprises.
At the end of each escrow computation year, your servicer must analyze the account and send you an annual escrow statement within 30 days (12 CFR 1024.17(c)(3), (i)). That statement is the letter that tells you your payment is changing.
Why Austin-area buyers often come up short in year one
The seller’s exemptions don’t transfer
Your escrow estimate at closing is often built from the seller’s most recent tax bill. If the seller had a homestead exemption or an over-65 exemption, that bill was lower than yours will be. Under Texas rules, a buyer who closes after January 1 can get a prorated homestead exemption for that year only if the prior owner didn’t receive it (Texas Comptroller). If the seller had it, your own exemption generally starts the following January 1.
New construction taxed as land only
If you bought a newly built home in an area like Leander, Pflugerville or Hutto, the last tax bill may have covered only the lot. Once the appraisal district values the finished house, the bill can rise sharply.
Rising appraisals and tax rates
Your bill depends on your appraised value and the tax rates set each year by your county, city, school district and other local taxing units. Either can change.
Homeowners insurance renewals
If your insurance premium goes up at renewal, your escrow payment follows.
Shortage vs. deficiency vs. surplus: what the federal rules say
| Situation | What it means | What the servicer may do | Rule |
|---|---|---|---|
| Shortage under 1 month’s escrow payment | The projected balance is below the target (including the cushion) | Leave it, require repayment within 30 days, or spread it over at least 12 months in equal payments | 12 CFR 1024.17(f)(3)(i) |
| Shortage of 1 month’s escrow payment or more | Same, but larger | Leave it, or spread it over at least 12 months in equal payments | 12 CFR 1024.17(f)(3)(ii) |
| Deficiency under 1 month’s escrow payment | The account balance is negative | Leave it, require repayment within 30 days, or require 2 or more equal monthly payments | 12 CFR 1024.17(f)(4)(i) |
| Deficiency of 1 month’s escrow payment or more | Same, but larger | Leave it, or require 2 or more equal monthly payments | 12 CFR 1024.17(f)(4)(ii) |
| Surplus of $50 or more | The account has more than it needs | Refund within 30 days of the analysis, if you’re current | 12 CFR 1024.17(f)(2) |
| Surplus under $50 | Same, but small | Refund it or credit it to next year’s escrow | 12 CFR 1024.17(f)(2)(i) |
The deficiency and surplus rules above apply when you’re current on your payments, meaning the servicer gets your payment within 30 days of the due date. Your servicer must also tell you at least once a year if there’s a shortage or deficiency (12 CFR 1024.17(f)(5)).
Lump sum or 12 months? How to decide
Your new payment usually has two parts: the higher ongoing escrow amount, and the shortage spread over 12 months. If you pay the shortage in one lump sum, only the first part stays. There’s no federal right to pay a shortage in a lump sum, but you can ask your servicer whether it accepts one.
Illustrative example
These round numbers are an example only.
- Shortage: $1,800
- Spread over 12 months: about $150 a month added to your payment for the next year
- Paid in a lump sum: the $150 a month goes away, but your payment still reflects the higher ongoing taxes and insurance
Paying the lump sum makes sense if you have the cash and want a lower monthly payment. Spreading it out keeps your savings intact. Neither choice changes the total you owe.
How to lower next year’s payment
- File your homestead exemption. Once it applies to your tax bill and the servicer re-analyzes the account, your escrow should reflect it. See our guide to filing your Texas homestead exemption.
- Protest your appraisal if you disagree with it. Protests to the Appraisal Review Board are due by May 15 or 30 days after your notice of appraised value is mailed, whichever is later (WCAD New Homeowner Checklist). Results aren’t guaranteed.
- Shop your homeowners insurance at renewal.
- Ask for a new analysis once your exemption shows up on your bill. Contact your servicer directly; CapFi is a broker, not your servicer.
Tax bills are usually mailed in October and are due by January 31 without penalty (WCAD).
Buying soon? 4 questions to ask your lender before closing
- What taxable value and exemptions does my escrow estimate assume?
- Is the estimate based on the seller’s bill, and did the seller have a homestead or over-65 exemption?
- If it’s new construction, does the estimate include the finished house or just the land?
- How much cushion is being collected at closing?
We can go through these with you. A broker can also compare lenders for you; read why Austin borrowers use a mortgage broker, and see our guide to understanding cash to close.
FAQ
Why did my mortgage payment go up if I have a fixed rate?
Because the escrow part of your payment, for property taxes and insurance, changed. Your principal and interest stay the same.
What is an escrow shortage?
An escrow shortage means your account’s projected balance falls below the target balance, including the allowed cushion.
How much cushion can a servicer hold?
No more than one-sixth of the estimated total annual payments from the escrow account, or about two months.
Can I pay an escrow shortage all at once?
There’s no federal right to pay a shortage in a lump sum, but you can ask your servicer whether it accepts one. For a shortage of one month’s escrow payment or more, your servicer can’t require you to repay it in less than 12 months.
Will my homestead exemption lower my payment?
It can, once the exemption applies to your tax bill and your servicer re-analyzes your escrow account.
When will I get a refund of an escrow surplus?
Within 30 days of the escrow analysis, if the surplus is $50 or more and you’re current on your payments.
When will I get my escrow statement?
Within 30 days of the end of your escrow computation year.
Buying in Austin?
We’ll show you the tax assumptions behind your escrow estimate before you close. Call (512) 593-1336 (by appointment only), email info@capfilending.com, or apply online. We serve Austin and Central Texas.
Sources: 12 CFR 1024.17 (eCFR) · CFPB Regulation X §1024.17 · Texas Comptroller: Property Tax Exemptions · WCAD New Homeowner Checklist
Disclosures: CapFi Lending, NMLS #1692019. Dustin Edwards, NMLS #577050. 2617 Willow St Unit 1, Austin, TX 78702 (by appointment only). (512) 593-1336. Equal Housing Opportunity. Verify licensing at NMLS Consumer Access. See our licensing page. This article is general education, not legal or tax advice. CapFi Lending is a mortgage broker, not your loan servicer; contact your servicer about your account. Last reviewed October 19, 2026.
