McKinney TX Property Taxes and Your Mortgage Payment — 2026

I'm Bond Peter Njoku (NMLS #2670329), and property taxes catch more McKinney buyers off guard than any other line item in their monthly payment. Collin County's combined effective tax rate runs around 1.5% of assessed value in 2026 — one of the lowest in the DFW metro — but McKinney's higher price tags mean the dollar amount still lands larger than a lower-rate county with cheaper homes. That trade-off matters when you're setting a real budget, not just comparing percentages.

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

Your total property tax bill in McKinney is a combination of several taxing entities layered together: Collin County, the City of McKinney, McKinney ISD, and sometimes a municipal utility district (MUD) in newer master-planned communities. Added together, the combined effective rate lands around 1.5% of assessed value for most McKinney addresses in 2026, though homes inside a MUD can run higher due to the added district assessment. I pull the exact combined rate for any specific property before I quote your payment — it varies neighborhood to neighborhood.

How much are property taxes on a $450,000 home in McKinney?

At the approximate 1.5% effective rate: $450,000 × 1.5% = $6,750 per year, or $563 per month. That $563/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.

McKinney sits at the low end of the DFW rate spectrum, which is one reason move-up buyers who could afford Dallas or Tarrant County homes often find their McKinney payment comparable despite the higher purchase price — the lower tax rate offsets part of the gap.

How much does the homestead exemption save me in McKinney?

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. McKinney's city and Collin County may layer on additional exemptions as well. On a $450,000 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 doesn't apply automatically — you have to file the paperwork with the Collin Central Appraisal District after closing, and I remind every client to do this in their first 90 days as a homeowner.

How do McKinney property taxes affect what 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 $450,000 McKinney home, that $563/month tax escrow is roughly equivalent to $80,000 of extra loan principal in how it affects your DTI math. I build the actual McKinney tax rate into every pre-approval I run, rather than using a generic statewide estimate, so the number I give you is the number that holds up at underwriting. This matters most for buyers stretching to the top of their budget, since an underestimated tax escrow can mean a denial at underwriting even after you've already gone under contract and paid for an appraisal and inspection.

What other exemptions can lower my McKinney tax bill?

Beyond the general homestead exemption, Collin County and McKinney ISD offer additional relief for specific situations. Buyers age 65 or older qualify for an additional homestead exemption and a school-tax freeze that locks their McKinney 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 McKinney 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 than the assessed value — I've seen clients successfully lower their assessment by 5–10% simply by submitting recent comparable sales during the May protest window.

A recent McKinney example

I worked with a family relocating from Tarrant County to McKinney last month — they were budgeting off a Tarrant tax estimate they'd seen online (around 2.2%) and were pleasantly surprised their McKinney payment came in lower than expected once I ran the actual combined rate. On their $460,000 home, the difference between the 2.2% estimate they'd assumed and Collin County's actual ~1.5% rate freed up about $270/month in their qualifying budget — enough to comfortably afford a home half a size class larger in the same monthly payment. We used that extra room to shop neighborhoods closer to McKinney ISD's newest elementary school instead of settling for their original search radius.