If your mortgage payment increased by $200–$400/month, it’s likely your property tax assessment. 68% of mortgaged homeowners saw increases last year. The cause is almost always the same: a higher tax assessment flowing through your escrow account. You’re not alone. This is one of the most common — and most confusing — financial surprises for Texas homeowners. Here’s what’s actually happening and what you can do about it.
What Is an Escrow Account and Why Does It Affect My Mortgage?
Your mortgage lender collects property taxes and homeowner’s insurance as part of your monthly payment. That money goes into an escrow account. When your property tax bill comes due, your lender pays it from that account.
Here’s the key: your lender estimates how much tax you’ll owe next year. If the county raises your assessed value, your estimated tax goes up — and your lender increases your monthly payment to cover the difference. This is why your mortgage payment can jump even when your interest rate hasn’t changed.
How Does a Tax Assessment Increase Become a Monthly Payment Spike?
A property tax increase doesn’t hit you once a year. It hits you every single month through escrow. Here’s the math:
Using a common 1.73% tax rate, here is how much an assessment increase will actually cost you:
+$20,000 Assessment Increase
Annual Tax Hike: ~$346/year
Monthly Escrow Jump: ~$29/month
+$40,000 Assessment Increase
Annual Tax Hike: ~$692/year
Monthly Escrow Jump: ~$58/month
+$60,000 Assessment Increase
Annual Tax Hike: ~$1,038/year
Monthly Escrow Jump: ~$87/month
+$80,000 Assessment Increase
Annual Tax Hike: ~$1,384/year
Monthly Escrow Jump: ~$115/month
And that’s just the tax portion. If your lender also had an escrow shortage from the previous year, they’ll add a catch-up amount to your monthly payment. That can double the impact in the first year.
What Can You Do About It?
The escrow increase is the symptom. The property tax assessment is the cause. If the county over-assessed your home, you have a legal right to challenge that number. It’s called a property tax protest, and it’s free to file.
Here’s what most homeowners don’t realize: if you successfully protest and get your assessed value lowered, the reduction flows back through your escrow. Your monthly payment comes back down.
Texas law says your assessed value can never go up from a protest. The worst that can happen is nothing changes. And if the numbers show your home is over-assessed compared to similar homes nearby, the odds are in your favor. Across Texas’s major counties, 70–99% of homeowners who protested at the informal stage received a lower value.
How Do I Know If My Home Is Over-Assessed?
You can check where your assessment stands versus similar homes nearby — free, in about 60 seconds. No signup required. Just enter your address at CheckMyPropertyTax.com and see your results instantly.
If the numbers show your home may be over-assessed, a protest-ready evidence packet is available for $39.99. It includes a fairness comparison report, a condition evidence tool, and filing instructions for your county. No contracts. You keep 100% of your savings.
Frequently Asked Questions
Why did my mortgage payment go up if my interest rate didn’t change?
Almost certainly your property tax assessment increased. Your lender collects taxes through escrow as part of your monthly payment. When taxes go up, your monthly payment goes up.
Can I protest the escrow increase directly?
No — the escrow increase is your lender’s response to higher taxes. The fix is to protest the property tax assessment itself. If you get a lower assessed value, the savings flow back through escrow and your monthly payment decreases.
When does my escrow payment adjust after a successful protest?
Most lenders conduct an annual escrow analysis. After a successful protest, your lower tax amount will be reflected at the next analysis, typically reducing your monthly payment for the following year.
Can my value go up if I protest?
No. Texas law says your assessed value can never increase as a result of a protest. The worst that happens is nothing changes.
What is the deadline to protest my 2026 assessment?
May 15, 2026 (or 30 days after you receive your appraisal notice, whichever is later).