Property Tax Formula Explained
The Property Tax formula explained in plain English: the equation behind the Property Tax Calculator, its variables, and the assumptions it makes.
By Onias Derilus, Mortgage Capital · NMLS# 1859012 · Last Updated: June 2026
It estimates your annual and monthly property tax. The result is based on the home's assessed value, the local millage rate, and any exemptions you qualify for.
The Property Tax Formula, Explained
Annual tax = (assessed value − exemptions) × millage rate
Property tax is the assessed value times a local rate, often quoted in mills (dollars per thousand of value). Exemptions reduce the taxable value before the rate is applied, lowering the bill.
The monthly figure matters for your mortgage because lenders collect property tax in escrow as part of your payment. The calculator gives both the annual bill and the monthly escrow amount.
The formula is only the starting point. Open the property tax calculator to plug in your own numbers and see the result instantly. For a rate tied to your actual file, talk to a licensed broker before you decide.
Turn Your Property Tax Estimate Into a Real Pre-Approval
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Rates are illustrative only. APR and payments vary by credit score, loan amount, and market conditions. Subject to credit approval. Not a commitment to lend. NMLS# 1859012. Equal Housing Lender.