Property Taxes for Homeowners: How They Work & How to Estimate

How the bill is calculated

• Assessed value: set by the county assessor, sometimes a fixed percentage of market value.
• Mill rate or tax rate: set by school districts, counties, cities, and special districts combined.
• Exemptions: homestead, senior, veteran, and disability reductions that lower the taxable base.
• Formula: (assessed value minus exemptions) times the tax rate equals your annual bill.

What buyers get wrong

• A long-time owner may have exemptions or assessment caps that do not transfer to you.
• Reassessment after sale can raise the bill by 50% or more in fast-appreciating areas.
• New construction is often taxed on land only in the first year, then jumps sharply.
• Special assessment districts for infrastructure can add hundreds per year in newer developments.
• Ask the county assessor directly what your estimated bill will be at your purchase price.

Exemptions and how to appeal

1. 1

   File for the homestead exemption on your primary residence — many owners never do.

2. 2

   Check for senior, veteran, disability, and agricultural exemptions in your state.

3. 3

   Review your assessment notice for factual errors in square footage, bedroom count, or lot size.

4. 4

   Pull three to five comparable recent sales that are lower than your assessed value.

5. 5

   File the appeal before your county deadline, usually 30 to 60 days after the notice.

Budgeting for increases

• Historically, bills tend to rise 2–5% a year in most jurisdictions.
• Some states cap annual increases for owner-occupants; many do not.
• The federal SALT deduction cap limits how much of this you can write off.
• Set aside an extra $25–$50 a month specifically for escrow growth.
• When comparing homes, compare tax rates across towns — the difference can exceed $300 a month on the same price.