Property Tax Glossary

Value words on notices and bills

Ad valorem tax

An ad valorem tax is a tax based on value. In property tax, it usually means the tax is based on the value of real estate or other taxable property. Miami-Dade County’s property appraiser explains this term in its property tax glossary.

Not every line on a tax bill is ad valorem. Some bills also include service charges, district charges, or special assessments that are not based on property value.

Assessed value

Assessed value is the value placed on property for tax purposes. The New York State Department of Taxation and Finance defines it as a dollar figure determined by an assessor and used, unless exempt, to compute a tax obligation in its assessment glossary.

Assessed value may not be the same as sale price. It may be market value, a percentage of market value, or a capped value, depending on state and local law.

Market value

Market value is usually an estimate of what a property would sell for in an open market. It may be based on recent sales, location, size, condition, and property features.

Market value can matter in an appeal. But your tax bill may be based on a different number after caps, ratios, exemptions, or local formulas are applied.

Taxable value

Taxable value is the value used to calculate the tax after exemptions, caps, classifications, or other adjustments are applied.

The Florida Department of Revenue shows the basic flow as market value, then assessed value, then exemptions, then taxable value, then millage rates in its property tax system guide. Florida’s rules are not national rules, but the chart is useful for understanding the order of the calculation.

Assessment roll or tax roll

An assessment roll or tax roll is an official list of taxable property in a jurisdiction. It often includes parcel numbers, owners, values, exemptions, property classes, and other records.

If your name, mailing address, exemption, property class, or value is wrong, contact the local assessor or property appraiser. Some errors can be corrected. Others may require a formal appeal or correction request.

Parcel number

A parcel number is the identifying number for a property. It may also be called an account number, tax map number, property ID, folio number, or APN.

Use this number when searching county records, calling an office, filing an appeal, or checking whether an exemption is on the property.

Rate and bill words

Taxing authority

A taxing authority is a government body that can use property taxes to fund its budget. This may include a county, city, town, school district, fire district, water district, library district, or other local district.

One bill may include several taxing authorities. That is why a bill can rise even when one part of the rate goes down.

Levy

Levy can mean the act of imposing a tax. It can also mean the amount of tax a government decides to raise.

In plain English, the levy is tied to how much money a taxing authority needs from property taxes. Local usage varies. Read the wording on your bill or budget notice carefully.

Millage rate or mill rate

A millage rate, also called a mill rate, is a property tax rate. One mill is often one dollar of tax for every $1,000 of taxable value.

The Florida Department of Revenue explains in its millage guide that the basic formula is taxable value divided by 1,000, then multiplied by the millage rate. Other states may use different names, but the idea is similar.

Tax rate

A tax rate is the rate used to calculate a tax. It may be shown as mills, dollars per $100 of value, dollars per $1,000 of value, or a percentage.

Do not compare tax rates across states without checking how property is valued. A low rate on a high taxable value can still create a high bill.

Delinquent taxes

Delinquent taxes are property taxes not paid by the due date. Penalties, interest, collection fees, liens, tax-sale steps, or foreclosure steps may begin under local law.

If your bill is late, contact the tax collector or treasurer listed on the official bill. Ask what is owed, what dates matter, and whether any payment option is available.

Relief words people often mix up

Property tax relief

Property tax relief is a broad term. It can mean an exemption, credit, rebate, refund, freeze, cap, deferral, postponement, abatement, or appeal result.

Some relief reduces the bill before payment. Some comes later through a state filing. Some delays payment and must be repaid. Some programs are only for owners. Some include renters.

Exemption

An exemption removes part of a property’s value from taxation or reduces the taxable amount in another way. Common examples include homestead, senior, disability, veteran, surviving spouse, and agricultural exemptions.

New York’s property tax pages explain that all property may be assessed, but not all assessed property is taxable, and list common property tax exemptions. Names and rules vary by state and local government.

Homestead

Homestead usually means the home you own and use as your main residence. A homestead exemption often reduces taxes on that main home.

Rules are not the same everywhere. Texas says a general residence homestead exemption generally requires an ownership interest and use of the property as the owner’s principal residence on its property tax exemptions page. Georgia explains state homestead filing rules on its homestead exemption page.

Renters usually do not apply for homestead exemptions. Renters should look for renter credits, renter refunds, rent rebates, or circuit breaker-style programs in states that offer them.

Circuit breaker

A circuit breaker is a relief program based on property tax burden compared with income. The idea is that a household may receive relief when the tax burden is high relative to income.

Some programs are for homeowners. Some include renters. Some are part of an income tax return. Maryland describes its renters’ tax credit as based on the relationship between rent and income and modeled on a homeowners’ credit known to many as a circuit breaker on its Renters’ Tax Credits page.

Credit

A credit reduces a tax amount. It may reduce a property tax bill, or it may be part of a state income tax filing connected to property taxes or rent.

A credit may be refundable or nonrefundable. That detail matters. Use the official state tax page to see how the credit is issued.

Rebate

A rebate is usually a payment or return of part of an eligible amount after a person applies and is approved. Rebate programs often have income, age, disability, residency, ownership, rent, or filing rules.

Pennsylvania’s Department of Revenue provides forms and instructions for its Property Tax/Rent Rebate Program. Other states use different names and rules.

Refund

A refund is money returned after a tax or eligible expense has been paid or reported. Minnesota’s Department of Revenue describes a Property Tax Refund for homeowners and notes renter relief is handled through its income tax process under current rules.

A refund is not the same as an exemption. An exemption may lower the bill before payment. A refund may come later.

Freeze

A property tax freeze usually limits future increases. It may freeze assessed value, taxable value, the tax amount, or one part of the bill.

A freeze does not always mean the whole bill can never change. New construction, special assessments, school taxes, income changes, moving, or renewal rules may affect the result.

Cap

A cap limits how much a value, tax, or rate can rise. A cap may be statewide, local, tied to homestead status, or tied to a property class.

Caps can help limit increases, but they can also make bills confusing because market value, assessed value, and taxable value may all be different.

Deferral

A deferral delays payment. It does not usually erase the tax.

Read deferral programs carefully. Some are treated like a loan. Some create a lien. Some charge interest. Some must be repaid when the owner sells the home, moves, dies, cancels the program, or no longer qualifies.

Oregon explains that its senior and disabled property tax deferral lets qualified homeowners borrow from the state to pay county property taxes and that a lien is placed on the property on its deferral program page. Minnesota explains that its senior deferral is repaid as a loan plus interest when the home is sold or the deferral is voluntarily canceled on its senior deferral page.

Postponement

Postponement also means delaying payment. Some states use this word where others use deferral.

Do not treat postponement as a simple discount. Check for lien, interest, repayment, estate, sale, and mortgage language before relying on it.

Appeal and denial words

Appeal

An appeal is a formal process to challenge a property tax decision. It may involve assessed value, market value, classification, exemption denial, deferral denial, penalty, or another issue allowed by local law.

San Diego County describes an assessment appeal as a process where property owners can appeal assessed value to an independent review board that reviews evidence from both sides on its assessment appeals page. Your state or county may use a different board name.

Informal review

An informal review is a less formal conversation or review with the assessor, appraiser, or property office. It may help correct simple errors or explain how value was set.

But an informal review may not protect your right to a formal appeal. If a notice gives an appeal deadline, do not assume a phone call stops the clock.

Appeal board, board of review, appraisal review board, or value adjustment board

These are names for bodies that hear property tax disputes. The name depends on the state. Use the official appeal path named on your notice.

Filing with the wrong office can create problems. So can missing the filing window.

Comparable sales

Comparable sales, often called comps, are sales of similar properties used to support value. Good comparisons are usually nearby, similar in size and condition, and close to the valuation date.

Appeals usually depend on evidence. Photos, property record errors, repair estimates, recent sales, appraisals, or income and expense records may matter, depending on the property and appeal type.

Denial notice

A denial notice tells you that an exemption, credit, deferral, classification, appeal, or other request was not approved.

Read the reason, deadline, office name, form name, and appeal instructions. Ask whether you can send missing documents, correct the application, or file an appeal.

Lien and payment danger words

Tax lien

A tax lien is a legal claim against property connected to taxes. It may happen because taxes are unpaid. It may also happen when a deferral or postponement program secures repayment.

A lien is serious. It can affect sale, refinancing, title, estate issues, and collection. Los Angeles County’s Treasurer and Tax Collector describes recording a certificate of tax lien for certain unpaid unsecured property taxes on its property tax liens page. Other counties and states have different rules.

Tax certificate

A tax certificate is used in some places when delinquent property taxes are sold or transferred as a lien interest. It is not always the same as selling the home itself.

Hamilton County, Ohio explains on its delinquent tax page that a tax certificate transfers the state’s lien on a delinquent parcel to the purchaser, and that the purchaser holds a lien rather than ownership.

Tax sale

A tax sale is a legal process related to delinquent taxes. Depending on the state, it may involve selling a lien, selling a certificate, or eventually selling the property interest.

If you receive a tax sale notice, contact the official treasurer or tax collector right away. You may also want legal aid, a housing counselor, or a lawyer. Do not ignore the notice because an exemption, appeal, or relief application is pending.

Redemption period

A redemption period is a period when an owner may still be able to pay what is owed and protect the property after certain tax sale steps.

This is a legal deadline area. The length and rules depend on state law and the notice you received.

Payment plan

A payment plan lets a taxpayer pay overdue or current taxes in installments if the official office allows it. Not every office offers one.

Ask whether penalties or interest continue and whether the plan stops tax sale or collection steps.

Renter words

Renter credit, renter refund, or rent rebate

These terms refer to relief for eligible renters in certain states. They may be based on rent, income, age, disability, household size, or other rules.

Renters should not usually look for homestead exemptions. They should look for the renter program name used by their state revenue or tax department.

Who usually handles what

Documents these terms may point you toward

Most property tax relief or appeal questions start with documents. The exact list depends on the program. Common items include:

• Property tax bill or assessment notice.
• Parcel number or property ID.
• Proof of ownership, if an owner program is involved.
• Proof the home is your main residence, if homestead or occupancy matters.
• Income documents, if income rules apply.
• Age, disability, veteran, surviving spouse, or other status proof, if the program is based on status.
• Denial letter, late notice, lien notice, or tax sale notice, if there is a problem.
• Photos, repair estimates, sales data, or property record corrections, if you are appealing value.

Fast comparison of common relief types