Allen TX Property Taxes and Your Mortgage Payment — 2026

I'm Bond Peter Njoku (NMLS #2670329), and Allen buyers ask me about property taxes almost as often as they ask about interest rates. Collin County's combined effective tax rate runs around 1.5% of assessed value in 2026 — one of the lowest rates in the DFW metro — but Allen's established, higher-priced neighborhoods mean the dollar amount still adds up. Knowing the real number before you write an offer keeps your monthly budget honest.

What is the property tax rate in Allen TX for 2026?

Your total property tax bill in Allen combines several taxing entities layered together: Collin County, the City of Allen, Allen ISD, and occasionally a municipal utility district (MUD) in newer developments. Combined, the effective rate lands around 1.5% of assessed value for most Allen addresses in 2026. Allen ISD carries an excellent reputation, which is part of why Allen's rate holds steady even as the district invests in its schools — I pull the exact combined rate for any specific address before I quote a payment, since it does shift by neighborhood.

How much does a mortgage cost in Allen TX, taxes included?

At the approximate 1.5% effective rate: $460,000 × 1.5% = $6,900 per year, or $575 per month. That $575/month gets escrowed directly into your mortgage payment alongside principal, interest, and insurance — your lender collects 1/12th of the annual estimate every month and pays the tax bill on your behalf when it's due. On a $460,000 home at 7.0% with 10% down ($46,000), principal and interest runs about $2,752/month; add the $575 tax escrow and roughly $140/month for homeowners insurance, and your full PITI payment lands near $3,467/month.

Allen sits at the low end of the DFW rate spectrum alongside the rest of Collin County, which is one reason buyers comparing Allen to Dallas or Tarrant County neighborhoods often find the monthly gap smaller than the price-tag gap suggests.

How much does the homestead exemption save me in Allen?

Once you close and move in as your primary residence, you can file for a general homestead exemption, which removes $100,000 of your home's assessed value from school district taxation statewide. The city of Allen and Collin County may layer on additional exemptions as well. On a $460,000 home taxed at roughly 1.5%, the school-district portion of that exemption alone can save $700–$1,000 per year, and combined exemptions often bring total savings to $1,000–$1,900 annually. The exemption isn't automatic — you file it with the Collin Central Appraisal District after closing, and I remind every Allen client to submit it within their first 90 days as a homeowner.

Do Allen property taxes affect what mortgage I qualify for?

Lenders don't just look at principal and interest when calculating your debt-to-income ratio — they include the full estimated PITI payment, taxes and insurance included. That means a higher tax rate directly lowers your qualifying loan amount, even if your income and credit score stay exactly the same. On a $460,000 Allen home, that $575/month tax escrow is roughly equivalent to $82,000 of extra loan principal in how it affects your DTI math. I build the actual Allen tax rate into every pre-approval I run rather than a generic statewide estimate, so the number I give you holds up at underwriting — especially important for buyers stretching toward the top of their budget in Allen's higher price tiers.

What other exemptions can lower my Allen tax bill?

Beyond the general homestead exemption, Collin County and Allen ISD offer additional relief for specific situations. Buyers age 65 or older qualify for an added homestead exemption and a school-tax freeze that locks their Allen ISD portion at the amount owed the year they turn 65, even if the district raises rates later. Disabled homeowners qualify for a similar exemption. And every Allen homeowner has the right to protest their annual appraised value with the Collin Central Appraisal District if comparable homes in their neighborhood sold for less — I've seen Allen clients successfully lower their assessment by 5–10% by submitting recent comparable sales during the May protest window.

A recent Allen example

Last spring I worked with a couple moving from Dallas County to Allen for the school district — they were budgeting off a Dallas tax estimate near 2.0% and assumed their Allen payment would land close to what they'd been paying. On their $475,000 home, the difference between the 2.0% they'd assumed and Collin County's actual ~1.5% rate freed up roughly $198/month in their qualifying budget. That extra room let them add a home office to their search criteria without pushing their monthly payment past what they'd originally planned to spend.