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Property Tax Math Worksheet

Try a simple property-tax worksheet without entering an address. It shows how assessment, rate, credits, and charges interact, but it is not an official bill estimate.

Data status: Levy Year 2025 property tax worksheet assumptions

Last checked: 2026-05-20. This worksheet uses Levy Year 2025 source material as a starter example. It does not produce an official tax bill.

FY26 Actual

The Short Version

FY26 Actual Other

Montgomery County property-tax bills depend on taxable assessment, the levy-year tax-rate schedule, credits, special districts, and property-specific charges.

This worksheet starts with an example Levy Year 2025 total rate of 1.1512 per $100 of assessed value. Replace that starter value with the total rate from your own tax class or bill.

The worksheet does not decide whether you qualify for a credit. For context, the County Tax Information page says the County Property Tax Credit has been $692 for each eligible property for several years.

Try The Tax Math

Your entries stay on this page. The worksheet does not ask for an address, save entries, or look up your property record. Use it to see how rate, assessment, credits, and charges interact.

This worksheet is not an official Montgomery County bill estimate. Use your tax bill, SDAT record, and the official rate schedule before making personal decisions.

Bill Math
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Use taxable assessment if you have it. Market value, phased assessment, and taxable assessment can differ.

The starter value is 1.1512 from Levy Year 2025 source material. Replace it with the total rate from your tax class or bill.

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Enter a credit only if you know it applies. For context, the County Tax Information page says the County Property Tax Credit has been $692 for each eligible property for several years.

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Homestead Cap Example
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The official Homestead Tax Credit page describes a 10% limit for most Montgomery County locations, with Kensington listed as a local exception. Eligibility depends on SDAT records.

Assumptions To Know

  • The worksheet does not ask for an address or save entries.
  • The main estimate is taxable assessment divided by 100, multiplied by a total tax rate.
  • The default rate is an example from Levy Year 2025 source material; it is not guaranteed to match a specific address, municipality, special district, or future levy year.
  • Credits and charges are optional manual entries. The worksheet does not decide eligibility.
  • The Homestead example uses a simplified cap calculation and is not a substitute for SDAT records.

The basic formula is simple: taxable assessment divided by 100, multiplied by the total rate per $100 of assessed value. Then any entered credits are subtracted and any entered charges are added.

Why Your Actual Bill May Differ

A real bill can differ because the correct rate depends on levy year, tax class, municipality, special district, and property-specific charges. The worksheet does not know those facts unless you enter them.

Credits can also change the bill. SDAT and official county records determine whether a property is a principal residence, whether a Homestead Tax Credit applies, and whether an income-based or age-based credit applies.

If you recently bought a home, changed use, had a reassessment, live in a municipality, or have special charges on the bill, use the official bill and source pages instead of this worksheet.

What People Often Misunderstand

A rate is not the whole bill. A lower rate on a higher taxable assessment can still produce a higher payment, and a credit can reduce the amount due without changing the rate.

Another common mistake is to treat one tax class as countywide. The official table has many lines because location and property details can change the total rate.

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