Property tax lookup: how to find your assessment, bill, and payment history

Last updated 2026-07-09

What is a property tax lookup and what can you actually find?

A property tax lookup is a search of your county's public records database. Almost every county now runs an online portal where you pull your parcel's assessed value, the tax bill amount, payment due dates, exemptions applied, and a full ownership and sales history. No phone call required.

Here is what most county portals show for free:

• Assessed value (what the assessor says your property is worth for tax purposes)
• Taxable value (assessed value after exemptions, like homestead or senior)
• Tax bill breakdown (how much goes to the school district, municipality, library district, and so on)
• Payment history (paid, delinquent, or in a payment plan)
• Property characteristics (square footage, lot size, year built, bedroom count as recorded by the assessor)
• Sales history (the last few recorded sale prices for your parcel)
• Comparable parcels (some portals let you search nearby sales directly)

That last item matters most if you think your assessment is too high. Your property tax records are the starting point for any appeal, and no paid service gives you better access to them than the county does for free.

One thing most county portals hide: the assessor's internal notes and the mass-appraisal model inputs. Those usually take a public-records request.

How do you search for property tax records by address or parcel number?

The fastest path is a direct search: type your county name plus "property tax search" or "assessor parcel lookup." The official county assessor or treasurer site should land in the first two results. If a third-party site asks for a fee, close the tab. The county's own portal is free.

Once you are on the right site, you can usually search three ways:

1. Street address (most common, works for residential owners) 2. Parcel number (APN or PIN) (the most precise, printed on any prior tax bill) 3. Owner name (works in most jurisdictions, though some restrict it for privacy)

After you pull up your parcel, screenshot or print the assessed value page and the property characteristics page. Those two pages are what you compare against comparable sales and your neighbors' assessments when you build an appeal.

If the county portal is clunky or down, two workarounds help. The USDA's National Agricultural Library keeps a directory of county government offices ^[1], and most state department of revenue sites link to every county assessor portal in the state. A handful of states, including Illinois, run a statewide lookup that covers all 102 counties.

For what the assessed value actually means and how it's built, see our explainer on property assessment value.

How does property tax lookup work in Sacramento County, California?

Sacramento County splits property tax duties across two offices. The Assessor's Office sets the value. The Tax Collector handles bills and payments. You need both portals for the full picture.

Sacramento County Assessor parcel search is at assessor.saccounty.gov. Search by APN or address and you get the Proposition 13 base year value, the current assessed value, any enrolled exemptions (the homeowner's exemption is $7,000 off assessed value under California Revenue and Taxation Code Section 218 ^[2]), and the property characteristics on file.

Sacramento County Tax Collector (tax.saccounty.gov) shows the actual bill, the two installment due dates (December 10 and April 10 each fiscal year), and payment status. Miss December 10 and you eat a 10% penalty under California Revenue and Taxation Code Section 2617 ^[2].

Proposition 13 caps annual assessed value increases at 2% unless the property sells or gets new construction. So the assessed value on a long-held Sacramento home can sit far below market. That is common, and it's nothing to appeal. The situation worth contesting is a recent reassessment that lands above actual market value. Sacramento County assessment appeals go to the Assessment Appeals Board, and the regular-roll filing window typically opens July 2 and closes November 30 ^[3].

The Assessor's site also runs a comparable sales search that pulls recent arm's-length sales in your neighborhood. That's the useful part for a DIY appeal. You can benchmark your assessed value against what similar homes actually sold for.

How does property tax lookup work in Shelby County, Tennessee?

Shelby County (Memphis) runs its lookups through two offices, same split as Sacramento.

Shelby County Assessor of Property (assessor.shelby.tn.us) handles value. Search by address, owner name, or parcel ID and you get the appraised value (the assessor's estimate at 100% of market), the assessed value (a percentage of that depending on property class), and any exemptions. Tennessee law sets the residential assessment ratio at 25% of appraised value, commercial at 40%, and industrial at 40% ^[4]. A Memphis home appraised at $200,000 carries a $50,000 assessed value before exemptions.

Shelby County Trustee (shelbycountytrustee.com) shows the actual bill and payment status.

Tennessee reassesses on a four-year cycle, and state law requires all counties to reappraise at 100% of market value. Shelby County's last general reappraisal finished in 2021, with the next due in 2025. The Tennessee State Board of Equalization publishes the appeal guidance, and informal appeals go to the Shelby County Board of Equalization first ^[4]. For the statewide framework, see our guide to the state of Tennessee property tax assessment.

One thing the Shelby portal does well: it shows the assessor's property record card with the exact characteristics (square footage, bedroom count, grade, condition rating) used in the mass appraisal. If any of those are wrong, that's your cheapest appeal argument.

How do you do a Will County, Illinois property tax lookup?

Will County, Illinois (Joliet area, south of Chicago) ranks among the highest-tax counties in the country by effective rate. The average effective rate has run roughly 2.5% to 2.8% of market value in recent years, per the Lincoln Institute 50-state study ^[11], against a national median closer to 1.1%.

Will County splits its tax functions across three offices:

• Will County Assessor's Office: sets the equalized assessed value (EAV), one-third of estimated market value under Illinois law (35 ILCS 200/1-50) ^[6]
• Will County Supervisor of Assessments: handles exemptions and the local Board of Review appeal
• Will County Treasurer: sends the bill and collects payments

The lookup portal is at willcountysoa.com (Supervisor of Assessments). Search by PIN (parcel index number), address, or owner name. The result shows the assessor's fair market value estimate, the assessed value (one-third of that), exemptions (general homestead is $6,000 off EAV, senior homestead adds $5,000 ^[6]), and the equalized assessed value after exemptions.

Will County bills come in two installments. The first is typically due in June (historically June 3), the second in September. Exact dates shift by year, so verify with the Will County Treasurer's site (willcountytreas.us). The Illinois late penalty runs 1.5% per month, and it stacks fast.

Objection deadlines matter here. Will County Board of Review complaints for a triennial reassessment year must be filed within 30 days of the published assessment date. Check whether your township sits in a reassessment year before you assume the window is open. Miss the deadline by one day and you wait three years.

Illinois also runs a Property Tax Appeal Board (PTAB) as a second-level appeal above the county Board of Review. PTAB decisions are published and searchable, which makes Will County one of the better-documented places to find comparable appeal outcomes ^[5].

What do the numbers in a property tax lookup actually mean?

This is where most homeowners get lost. Here is a plain-language decoder.

Appraised value (or fair market value estimate): What the assessor believes the property would sell for between a willing buyer and seller. The starting number.

Assessment ratio: A state-set percentage of appraised value used to reach the taxable base. It swings widely by state and property class.

Assessed value: Appraised value times the assessment ratio. In Illinois it's roughly 33%. In Tennessee it's 25% for residential. In California it's 100% (but Prop 13 caps the base).

Equalization factor: Some states, Illinois most visibly, apply a state multiplier to local assessed values so different counties end up at a uniform assessment level statewide. Illinois publishes county-specific equalization factors every year ^[5].

Taxable value: Assessed value minus any exemptions you qualify for (homestead, senior, disability, veteran).

Tax rate (mill rate): The rate applied to taxable value to produce your bill, expressed in mills (dollars per $1,000 of taxable value) or as a percentage.

Tax bill = (Taxable value / 1,000) × mill rate

Here is a simplified example across three counties:

County	Market Value	Assess. Ratio	Assessed Value	Homestead Exempt	Taxable Value	Est. Rate	Est. Bill
Sacramento CA	$500,000	100% (Prop 13 base)	$500,000	$7,000	$493,000	1.1%	$5,423
Shelby TN	$200,000	25%	$50,000	$0 (no general homestead)	$50,000	4.05/100	$2,025
Will County IL	$300,000	~33%	$99,000	$6,000 (general)	$93,000	~8.5% of EAV	~$7,905

These are illustrative, using published ratios and approximate recent rates. Your actual bill depends on your specific tax district overlaps. Verify with your county treasurer.

The gap between assessed value and market value is what makes an appeal possible. If the assessor's market value estimate beats what your home would actually sell for, you have an argument. If the assessment ratio or equalization factor got applied wrong, that's a second argument. If your recorded characteristics are wrong (the assessor thinks you have 2,200 sq ft and you have 1,850), that's often the easiest win. See our broader guide on values assessment for how assessors build these numbers.

How do you use a property tax lookup to check if your assessment is too high?

The lookup is more than a bill viewer. It's the foundation of any appeal. Here's how to use it as a diagnostic.

Step 1: Pull your property record card. It shows every physical characteristic on file: square footage, lot size, bed and bath count, garage, pool, condition rating. Errors here are common. A contractor pulls a permit for a renovation and the assessor tacks on square footage that never got built. Or the record still shows a garage that burned down in 1998. Every error you find is a ground for appeal that needs zero market-value argument.

Step 2: Pull 5 to 10 comparable sales. Use the county's own comparable sales search (Sacramento and most large counties have one) or the county GIS parcel viewer. Look for sales in the last 6 to 12 months, within a half-mile, similar size and age. These comps are the same data the assessor uses.

Step 3: Divide each comp's sale price by the assessor's fair market value estimate for that parcel. If your ratio runs consistently higher than your neighbors', your assessment is likely out of line. This is an equity analysis, and it's a legitimate appeal argument in almost every state.

Step 4: Look up comparable assessed values, more than sale prices. In many states you can argue that a neighbor with an identical home is assessed lower. That's a uniformity or equity appeal. Pull your neighbors' assessments from the same portal.

If you have a credible case after those four steps, you're ready to file. TaxFightBack's appeal kit walks through organizing the evidence into the exact format most county boards want, so you keep 100% of whatever reduction you win.

For county-specific appeal context, we have detailed guides for Bexar County property taxes, Denton County property tax, OC property tax, and Clark County property tax.

What are the most common property tax lookup portals by state?

No single national database covers every county. Here are the most reliable free sources by type.

States with a centralized statewide portal:

• Illinois: My Tax Illinois and the Illinois Comptroller (some lookup functions), plus county-level sites
• Tennessee: the Tennessee Comptroller's mapping and reappraisal portals ^[4]
• New York: the NY State Office of Real Property Tax Services posts assessment rolls by municipality
• Florida: the Florida Department of Revenue links to all 67 county property appraisers

Large counties with standalone portals worth using:

• Los Angeles County: assessor.lacounty.gov
• Cook County IL: cookcountyassessor.com
• Harris County TX: hcad.org
• Maricopa County AZ: mcassessor.maricopa.gov
• King County WA: kingcounty.gov (Assessor section)
• Philadelphia: philadelphiataxcenter.phila.gov (see our Philadelphia property tax guide)
• Montgomery County MD: montgomery county property tax
• Loudoun County VA: loudoun county property tax
• DeKalb County GA: dekalb county tax assessor

When a county has no portal: some rural counties still run no online parcel search. Call the county assessor's office directly and ask for your assessment card by mail, or check whether your state's department of revenue posts a statewide roll.

Third-party aggregators like Zillow, Redfin, and Realtor.com do pull assessment data, but it often lags by 6 to 18 months and sometimes misstates the source figures. Verify with the official county source before any number goes into an appeal filing.

How do you look up property taxes for a home you want to buy?

Buyers use these lookups differently than current owners. A few things to check before you close.

The current owner's tax bill is not your tax bill. In states with acquisition-value assessment (California under Prop 13, Michigan under Proposal A, Florida under Save Our Homes), the assessed value resets to market value when the property sells. A seller paying $4,000 a year in California can turn into $12,000 a year for you, because the Prop 13 base resets to your purchase price ^[2].

In most other states, the assessment does not automatically reset on sale. The assessor may or may not reassess in the year after purchase. In Illinois, assessments run on three-year township cycles, so a newly bought home might not get fully reassessed for up to three years.

How to estimate your post-purchase bill: find the current mill rate for the property's tax districts (usually on the county treasurer site), apply it to your purchase price adjusted by the assessment ratio, and subtract any exemptions you'll qualify for after closing (like the homestead exemption, which most states make you apply for in the year of purchase).

Delinquent taxes run with the land, not the seller. Always pull the county treasurer's payment history during due diligence. A delinquent tax lien can survive a sale and become your problem. This is no hypothetical. Unpaid property taxes are a leading reason title insurance claims get filed.

What should you do if the information in your property tax lookup is wrong?

Wrong data in the assessor's record happens more than most people think. Mass appraisal systems process hundreds of thousands of parcels off permit data, aerial imagery, and the occasional field review. Errors pile up.

Physical characteristic errors (wrong square footage, wrong bath count, a pool that isn't there) get fixed by contacting the assessor's office and providing documentation: a floor plan, a permit showing the original construction, photos. Most counties have a simple correction request form. Fixing a characteristic doesn't automatically drop your bill. The assessor reruns the valuation with the corrected data. But if the error was inflating your value, the bill should fall.

Ownership errors (wrong owner name after a sale) get fixed through the recorder's office. A recorded deed triggers the ownership update. If it hasn't posted, give the deed recording number to the assessor.

Exemption errors (your homestead exemption vanished from the lookup) show up often after a refinance or a transfer between spouses. Contact the assessor's exemptions division. In most states, if the exemption was legitimately yours and got dropped by mistake, you can get it applied retroactively for the current year, though recovering prior years varies by state law.

If correcting data isn't enough and you still believe the value is too high, that's when you file a formal appeal. Deadlines are firm in most jurisdictions. Miss one and you live with the overassessment until the next cycle. For the basics on how property taxes are set and deducted, the IRS has a plain-language overview of real property taxation worth a read ^[7].

How do property tax exemptions show up in a lookup, and how do you claim missing ones?

When you pull your parcel, look for a section labeled "exemptions" or "deductions." You should see each exemption listed by name and the dollar amount it knocks off your assessed or taxable value.

Common exemptions that should appear:

• Homestead / Principal residence: reduces assessed value or gives a flat dollar credit. Illinois general homestead is $6,000 off EAV, the California homeowner's exemption is $7,000 off assessed value ^[2], and Tennessee has no general homestead but does offer a greenbelt classification for agricultural land ^[4].
• Senior citizen: extra reduction above an age threshold. Often income-tested.
• Disability: varies widely by state. Some are flat reductions, some full exemptions.
• Veterans / surviving spouse: many states exempt part or all of the home's value for service-connected disability.

If an exemption you qualify for isn't showing, you probably need to apply. Most exemptions are not automatic. The typical process is a one-page application to the county assessor with proof (a driver's license showing the address for homestead, a birth certificate or ID for age, a VA rating letter for veterans).

Deadlines vary by state and county. In Illinois, the general homestead application deadline is typically July 1 of the tax year. In California, the homeowner's exemption claim must be filed by February 15 to apply to the current year ^[2]. Miss it and you wait a full year. Check your county assessor's site for the exact date.

Will County property tax lookup: a step-by-step walkthrough

Will County earns its own walkthrough because it stacks high rates, a confusing three-office structure, and triennial reassessment cycles that leave a narrow appeal window.

Step 1: Go to willcountysoa.com. This is the Will County Supervisor of Assessments site. Click "Property Search."

Step 2: Search by address or PIN. Your PIN is a 14-digit number on any prior tax bill. No bill handy? Search by address.

Step 3: On the results page, note:

• Fair cash value (the assessor's market value estimate)
• Assessed value (should be roughly one-third of fair cash value per 35 ILCS 200/1-50) ^[6]
• The equalization factor (the state multiplier, published by the Illinois Department of Revenue each year) ^[5]
• All exemptions claimed and their values
• The equalized assessed value (EAV) after the multiplier and exemptions

Step 4: Check your bill and payment status at willcountytreas.us. The treasurer's site breaks down where each dollar goes: school district, county, municipality, fire district, park district. In Will County, school district levies typically run 60% to 70% of the total bill.

Step 5: Compare your EAV to neighbors. Use the same portal to search nearby addresses with similar homes. If your EAV runs well above comparable parcels, you have an equity argument for the Board of Review.

Step 6: If you're in a reassessment year, note the date the township reassessment was published in the local newspaper. The official notice runs there, not by mail. Your 30-day complaint window starts from that date. The Will County Board of Review complaint form lives on willcountysoa.com.

For the broader Illinois appeal picture, the Illinois Department of Revenue's Property Tax section lays out the full PTAB process if you need to go above the county level ^[5].

Frequently asked questions

How do I find my property tax assessment online for free?

Go straight to your county assessor's website. Search your county name plus "property tax search" or "parcel lookup." The official county site is always free. Skip third-party sites charging fees for the same public data. Search by address, parcel number, or owner name to pull your assessed value, tax bill, and property characteristics.

Will County property tax lookup: where do I go?

Use willcountysoa.com (Supervisor of Assessments) for assessed values, EAV, and exemptions. Use willcountytreas.us (Treasurer) for your bill and payment history. You need both sites for the full picture. Will County's effective property tax rate has run roughly 2.5% to 2.8% of market value, among the highest in the nation.

What is the Sacramento County property tax assessment lookup tool?

Sacramento County's assessor portal is at assessor.saccounty.gov. Search by APN or address to see your Proposition 13 base year value, current assessed value, and enrolled exemptions. For your bill and due dates, use the Tax Collector at tax.saccounty.gov. The December 10 and April 10 installment deadlines are set by California Revenue and Taxation Code Section 2617.

How does Shelby County property tax assessment lookup work?

Search assessor.shelby.tn.us for the appraised value and assessed value (25% of appraised for residential under Tennessee law). Then check shelbycountytrustee.com for the actual bill and payment status. The property record card on the assessor's site shows the physical characteristics used in the appraisal, and errors there make a strong appeal argument.

Is the assessed value on a property tax lookup the same as market value?

Not necessarily. Assessed value comes from the assessor's market value estimate, but most states apply an assessment ratio. Tennessee residential is 25% of appraised value, Illinois about 33%, California 100% but Prop 13 caps annual increases at 2%. Check your state's ratio to translate assessed value back to the implied market value estimate.

Can I use a property tax lookup to check my neighbor's assessment?

Yes. County property tax records are public. Search any parcel in the county by address or parcel number and see the assessed value. Comparing your assessment to similar neighboring homes is an equity analysis, and it's a legitimate, commonly used appeal argument. If identical homes next door are assessed lower, that gap is evidence of unequal treatment.

How often does county property tax assessment data update online?

It varies. Most counties update assessed values annually once the assessment roll is finalized, usually in spring or summer. Payment status typically updates within a few business days of a payment posting. Property characteristic data can lag a year or more after a permit is pulled. Treat portal data as a starting point and verify with the assessor when preparing an appeal.

What if my property tax lookup shows I have no homestead exemption?

You probably need to apply. Most homestead exemptions require a separate application to the county assessor with proof of primary residence. Deadlines are strict: February 15 in California, typically July 1 in Illinois. If the exemption was on your record and disappeared, contact the assessor's exemptions division. Some counties will retroactively restore an erroneously removed exemption for the current tax year.

Does a property tax lookup show if taxes are delinquent?

Yes. The county treasurer portal shows whether taxes are current, delinquent, or in a payment plan. Delinquent taxes accrue penalties and interest, and in most states a tax lien attaches to the property and survives a sale. If you're buying, check the treasurer portal during due diligence. Unpaid property taxes are a leading cause of title insurance claims.

How do I use my property tax lookup results to appeal my assessment?

Pull your property record card and check for characteristic errors (wrong square footage, features that don't exist). Then search 5 to 10 recent comparable sales near your property and compare the assessor's market value estimates for those parcels against yours. If your implied market value beats what comparables support, you have a market-value appeal. If your assessed value runs higher per square foot than similar neighbors, you have an equity appeal.

Are property tax lookup portals the same as GIS parcel viewers?

Related but different. GIS parcel viewers show geographic and spatial data (lot boundaries, zoning, aerial imagery). Property tax lookup portals show the financial and assessment data. Many counties integrate both into one portal or link them. For a DIY appeal, use the assessment portal for the numbers and the GIS viewer to map comparable properties in your neighborhood.

What is an APN or PIN and where do I find mine?

APN (Assessor's Parcel Number) and PIN (Parcel Index Number) are regional terms for the same thing: a unique numeric identifier for your parcel in county records. It's always printed on your property tax bill. In Illinois it's a 14-digit number. In California it's typically three sets of numbers separated by dashes. No bill? The county recorder's office can look it up from your deed.

Can I look up property taxes for commercial properties the same way?

The same portals work for commercial parcels, but the methodology differs. Commercial properties are often assessed by income capitalization rather than sales comparisons, and ratios can differ (in Tennessee, commercial is assessed at 40% of appraised value versus 25% for residential). The property record card for commercial parcels often carries less publicly visible detail than residential records.

How do I look up property taxes for a home I'm considering buying?

Search the address on the county assessor and treasurer portals for the current assessed value, bill amount, and whether taxes are current. Then check whether the state resets assessment at sale (California does under Prop 13, most other states vary). Estimate your post-purchase bill using the published mill rate applied to your expected purchase price times the state's assessment ratio, minus any exemptions you'll qualify for.

Sources

1. USDA National Agricultural Library: USDA maintains reference directories of government offices used to locate official county property records portals.
2. California State Board of Equalization, Property Tax Publications and Proposition 13 / Revenue and Taxation Code: California Proposition 13 caps annual assessed value increases at 2%; homeowner's exemption is $7,000 under R&T Code Section 218; late payment penalty is 10% under R&T Code Section 2617; homeowner's exemption deadline is February 15.
3. Sacramento County Assessment Appeals Board: Sacramento County regular-roll assessment appeals filing window typically opens July 2 and closes November 30.
4. Tennessee Comptroller of the Treasury, Division of Property Assessments: Tennessee law sets the residential property assessment ratio at 25% of appraised value and commercial at 40%; Shelby County's most recent general reappraisal completed 2021; informal appeals go to the county Board of Equalization first; Tennessee offers a greenbelt classification for agricultural land.
5. Illinois Department of Revenue, Property Tax: Illinois publishes annual county equalization factors and provides guidance on the Property Tax Appeal Board (PTAB) process.
6. Illinois Compiled Statutes, 35 ILCS 200 (Property Tax Code): 35 ILCS 200/1-50 sets assessed value at one-third of fair market value; general homestead exemption is $6,000 off EAV; senior homestead is an additional $5,000.
7. Internal Revenue Service, Topic No. 503 Deductible Taxes: IRS plain-language overview of real property taxation and deductibility of state and local property taxes.
8. Will County Supervisor of Assessments: Will County property lookup portal showing fair cash value, assessed value, EAV, exemptions; Board of Review complaint process with 30-day filing window from published reassessment notice.
9. Sacramento County Assessor's Office: Sacramento County parcel search by APN or address showing Prop 13 base year value, current assessed value, enrolled exemptions, and property characteristics.
10. Shelby County Assessor of Property: Shelby County property lookup showing appraised value, assessed value, exemptions, and property record card with the assessor's physical characteristic data.
11. Lincoln Institute of Land Policy, 50-State Property Tax Comparison Study: The national median effective property tax rate is approximately 1.1% of market value; Will County IL rates run among the highest in the country. The Lincoln Institute 50-state study is the primary academic source for cross-jurisdictional rate comparisons.