Property tax calculator PA: how to estimate your bill and fight it

Last updated 2026-07-09

How does property tax actually work in Pennsylvania?

Pennsylvania has 67 counties, and every single one runs its own assessment system. That means there is no statewide property tax rate to plug into a simple formula. Your bill is the product of two numbers: your property's assessed value (set by the county assessor) and the combined millage rate (set each year by your county, municipality, and school district).

Millage is just tax per $1,000 of assessed value. A millage rate of 20 mills means you owe $20 for every $1,000 of assessed value. Add together the county mills, municipal mills, and school district mills, and you have your total millage. Multiply that by your assessed value, divide by 1,000, and you have your bill before any exemptions.

The wrinkle is that "assessed value" does not mean market value in most Pennsylvania counties. Pennsylvania law under the General County Assessment Law (72 P.S. § 5020-101 et seq.) allows counties to assess at some fraction of market value, called the common level ratio (CLR) ^[1]. The State Tax Equalization Board (STEB, now folded into the Pennsylvania Department of Revenue) certifies a CLR for each county every year ^[2]. In some counties the CLR is close to 100%, meaning assessed value nearly equals market value. In others, like Allegheny County, assessed value may be only 54% of what a home would sell for today.

That gap matters enormously for appeals, but we will get to that. First, let's build the calculator.

What is the formula to calculate your Pennsylvania property tax bill?

The math has three steps.

Step 1: Find your assessed value. Look at your most recent tax notice or look up your parcel on your county assessor's website. This is the number the county has assigned to your property, not what you paid for it or what Zillow shows.

Step 2: Find your combined millage rate. The county, municipality, and school district each publish a millage rate annually. Your county's tax claim bureau or assessor's office lists these. The Pennsylvania Department of Community and Economic Development (DCED) also publishes a statewide millage table each year ^[3].

Step 3: Do the arithmetic.

What you need	Where to get it
Assessed value	County assessor parcel lookup or your tax bill
County millage	County tax claim bureau website
Municipal (borough/township) millage	Municipality website or DCED table
School district millage	School district or DCED table
Common Level Ratio	PA Dept. of Revenue, annual CLR list

Formula:

`Estimated annual tax = (Assessed value / 1,000) × (County mills + Municipal mills + School mills)`

Example: A home in Montgomery County with an assessed value of $280,000 and a combined millage of 31.8 mills would owe approximately $8,904 per year before exemptions.

If you want to work backward from your home's likely sale price to check whether you are over-assessed, use the CLR:

`Indicated assessed value = Market value × CLR`

If the number the county has on file is higher than that indicated value, you are a candidate for an appeal. property tax taxation explains how assessors set value in more detail if you want to go deeper on that side of the equation.

What are the property tax rates by county in Pennsylvania?

Effective property tax rates, expressed as a percentage of market value, vary enormously across Pennsylvania's 67 counties. The table below shows a sample based on data from the Tax Foundation and DCED millage schedules ^[3][4]. Effective rate combines all taxing bodies and uses the county's CLR to convert assessed value to a market-value equivalent.

County	Median home value (approx.)	Effective tax rate (approx.)	Notes
Allegheny	$165,000	2.1%	Last reassessment 2012; CLR ~54% [2]
Philadelphia	$250,000	1.4%	Last reassessment 2023
Montgomery	$380,000	1.6%	Frequent reassessments
Bucks	$395,000	1.6%	School millage is the largest component
Chester	$415,000	1.5%	One of the wealthiest counties in PA
Lancaster	$240,000	1.8%	Rural parcels can differ sharply
Luzerne	$145,000	2.7%	Older assessments; high school millage
Centre	$230,000	1.4%	Penn State tax-exempt land affects base

These figures are approximations drawn from published millage schedules and CLRs. Your actual bill will differ because school district millage within a single county can vary by several mills depending on which district your parcel falls in. Always pull the actual millage schedule for your specific school district from your county assessor or from the DCED table ^[3].

Statewide, Pennsylvania's average effective property tax rate is approximately 1.49% of market value, which places it above the national average of roughly 1.1% ^[4]. Philadelphia runs its own way because of how its school district is funded.

How do I use the common level ratio to spot an over-assessment?

The Common Level Ratio is the single most useful number for a Pennsylvania homeowner who suspects their assessment is too high. The Pennsylvania Department of Revenue publishes the CLR for each county every year, typically in the fall ^[2]. The ratio tells you what fraction of market value the county's assessed values represent, based on actual arm's-length sales.

Here is the practical use. Say the CLR for your county is 0.82 (82%). That means the county intends for assessed values to equal 82% of what properties actually sell for. If your home's assessed value is $300,000, the county is implying your market value is roughly $300,000 / 0.82 = $365,854.

Now check what your home would actually sell for today. If you believe the real market value is, say, $320,000, then your "correct" assessed value should be $320,000 × 0.82 = $262,400, not $300,000. That $37,600 gap is your basis for an appeal.

Pennsylvania's assessment appeal statutes reinforce this. Under the Fourth to Eighth Class County Assessment Law and related statutes, the assessment ratio must be uniform, and the CLR is the benchmark courts use to test that uniformity ^[1]. The state Supreme Court in Downingtown Area School District v. Chester County Board of Assessment (2004) confirmed that the CLR is the appropriate equalizer in appeals, though the specific legal standards have evolved since then.

One thing to know: if a county has done a recent countywide reassessment, the CLR may be very close to 1.0, meaning assessed value nearly equals market value. In that case the CLR adjustment matters less, and you are simply arguing about whether the assessor's opinion of market value is too high.

How do you calculate property taxes on a rental property in Pennsylvania?

The math for a rental property is identical to the residential formula above. Pennsylvania does not apply a separate millage rate to investment property versus owner-occupied residential property at the county assessment level. Your rental property tax estimate is:

`Annual tax = (Assessed value / 1,000) × Combined millage`

What does differ for rental property owners is strategy. Residential homeowners can claim the Homestead Exclusion (described in the next section), but a property you rent out does not qualify for that exclusion unless you live there as your primary residence.

For a rental property tax calculator, you need one extra input: what is the income capitalization value of the property? Commercial appraisers use the income approach, more than sales comps, to estimate market value. If your rental generates $24,000 in annual net operating income and cap rates in your area are 6%, the income approach puts market value at $400,000. If the county has it assessed at an equivalent market value of $480,000, you have an argument.

Allegheny County and Philadelphia County assessors do consider income data for income-producing properties, so if you own a duplex or small apartment building, pulling your actual rent rolls and expense statements is worth the effort before an appeal hearing.

For landlords who own property across multiple counties, the DCED's annual municipal statistics page is the fastest way to compare effective millage across jurisdictions ^[3]. See also online tax payment for property for managing multi-property payment schedules.

What exemptions reduce your Pennsylvania property tax bill?

Pennsylvania offers several exemptions and programs that can materially lower your bill. Knowing about them before you run your estimate matters, because the calculator math above gives you the gross bill, not what you will actually owe after exemptions.

Homestead Exclusion (Act 50 of 1998 / Act 1 of 2006). Every owner-occupied primary residence in Pennsylvania qualifies for the Homestead Exclusion ^[5]. The exclusion reduces your assessed value by a set dollar amount before calculating the school district tax. The exclusion amount varies by school district. In many districts it is $15,000 to $30,000 off the assessed value. File once with your county assessor; the exclusion stays in place until you move or sell. Deadline is typically March 1 of the year you want the exclusion, though counties vary.

Senior citizen tax freeze programs. The Pennsylvania Property Tax/Rent Rebate Program, administered by the Department of Revenue, provides rebates of up to $1,000 for homeowners age 65 and older, widows/widowers age 50 and older, and people with disabilities age 18 and older, with income limits ^[6]. The income threshold for homeowners is currently $35,000 per year (with half of Social Security excluded from that calculation). Applications are due June 30 each year.

Local senior freeze programs. Many counties and municipalities layer additional freezes or reductions on top of the state program. Allegheny County, for example, has its own Senior Citizen Tax Relief program.

Disabled veterans. A 100% service-connected disability rating can qualify a veteran for a full exemption from real estate taxes under the Veterans' Real Property Tax Exemption Act (51 Pa. C.S. § 8904) ^[7]. The application goes through the county assessor.

Clean and Green (Act 319). Agricultural and forest land can be taxed at use value rather than market value under this program, which can cut assessed values dramatically for farms ^[8].

After applying any exemptions you qualify for, recalculate:

`Taxable assessed value = Assessed value minus applicable exclusions` `Actual tax = (Taxable assessed value / 1,000) × Combined millage`

What are the property tax appeal deadlines in Pennsylvania?

Missing the deadline ends your appeal for the year. Pennsylvania's deadlines are set by individual county ordinance within the framework of state law, so the exact date varies by county.

The standard deadline for a formal appeal to the county Board of Assessment Appeals (or Board of Property Assessment Appeals and Review in Allegheny County) is August 1 of the tax year in most counties ^[1]. But several counties use different dates. Here is a sample of deadlines that were in effect recently:

County	Appeal deadline (typical)	Board
Philadelphia	First Monday in October	Board of Revision of Taxes (BRT)
Allegheny	March 31	Board of Property Assessment Appeals and Review
Montgomery	August 1	Board of Assessment Appeals
Bucks	August 1	Board of Assessment Appeals
Chester	August 1	Board of Assessment Appeals
Lancaster	August 1	Board of Assessment Appeals
Luzerne	September 1	Board of Assessment Appeals

Always verify the current deadline directly with your county board. Dates can shift by a week or two depending on when assessment notices go out. Allegheny County's March 31 deadline is notably earlier than most, and it catches homeowners off guard every year.

After an unfavorable board decision, you can appeal to the Court of Common Pleas within 30 days of the board's decision, and from there to Commonwealth Court ^[1].

For a broader look at how the appeal process works in Pennsylvania and what evidence to bring, see our guide to property tax taxation.

How do I actually appeal a Pennsylvania property tax assessment myself?

The appeal process is more accessible than most homeowners assume. You do not need an attorney or a contingency-fee service to file.

Step 1: Pull the appeal form. Your county assessor or board of assessment appeals office has a standard form. Many are available online. In Allegheny County it is called the "Appeal of Real Property Assessment" form from the Board of Property Assessment Appeals and Review ^[9].

Step 2: Gather your evidence. The single strongest piece of evidence is a recent sale of your own property, if you bought within the past 12 to 24 months at arm's length. If you paid less than what the county says your market value is, that sale is your best argument. If you did not recently sell, you need comparable sales (comps), pulled from your county recorder of deeds or from public MLS data. Three to five comps of similar homes that sold in the past year, adjusted for size, condition, and location, build the core of your case.

Step 3: Use the CLR. Present both your opinion of market value and the resulting indicated assessed value using the county's published CLR. Show the board what your assessed value should be.

Step 4: File before the deadline. File the form, your evidence, and any filing fee (usually $25 to $75, varies by county) with the board. Keep a copy of everything.

Step 5: Show up. Board hearings are informal administrative hearings, not courtrooms. You present your comps and your argument. The assessor may or may not attend. Speak plainly, stick to numbers, and ask the board to reduce your assessment to the amount supported by your comps and the CLR.

If you want a structured framework for gathering comps, organizing the packet, and writing the one-page summary the board actually reads, the TaxFightBack DIY Appeal Kit walks through every step in county-specific detail, so you keep 100% of any savings without paying a contingency firm.

For a sense of how other jurisdictions handle the process, miami dade property taxes and detroit property taxes show how much appeal procedures vary by state.

Which counties have the highest and lowest property taxes in Pennsylvania?

The honest answer is that "highest" depends on whether you measure by effective tax rate, total dollar bill, or millage. Here is a breakdown using all three lenses, drawn from Tax Foundation and DCED data ^[3][4].

By effective rate (tax as % of market value): Luzerne County (approximately 2.7%), Monroe County (approximately 2.6%), and Pike County (approximately 2.4%) tend to rank highest. These counties have older, stale assessments and high school millage relative to property values. Forest County and Cameron County tend to rank lowest, often below 1.0%, but those counties have very small tax bases and rural property values.

By median dollar bill: Allegheny and Montgomery County homeowners pay the largest median total bills in absolute dollars simply because home values are higher, even when their effective rates are moderate.

The school district effect: In most Pennsylvania counties, school district millage accounts for 60% to 75% of the total property tax bill. That means two homes in the same county but different school districts can have materially different bills on identical properties. The Pittsburgh School District, for example, carries a much higher millage than some suburban Allegheny County districts.

If you are buying property and want to compare jurisdictions, the DCED's "Local Government Financial Statistics" publication lists millage rates for every county, municipality, and school district ^[3]. It is published annually and is the primary source practitioners use. Comparing that to how other high-tax states calculate bills, like nyc property tax or la county property tax, puts Pennsylvania's variation in national context.

Does Philadelphia calculate property taxes differently from other PA counties?

Yes, and the differences are significant. Philadelphia is a consolidated city-county, which means there is no separate city and county millage. The City of Philadelphia and School District of Philadelphia each set their own rates, and those rates apply to all taxable property in the city.

Philadelphia assesses property at 100% of market value (after its 2023 reassessment cycle), and it publishes Actual Value Initiative (AVI) assessments for every parcel ^[10]. The combined millage rate for 2024 was approximately 8.636% of assessed value (the city's rate is expressed as a percentage of value rather than mills per $1,000, which is effectively the same math).

Philadelphia also has unique abatement programs that can dramatically reduce the effective bill. The 10-year tax abatement on new construction and substantial renovation was modified by Philadelphia City Council; as of 2022, new residential construction abatements are graduated rather than full ^[10]. These abatements can mean two identical homes a block apart pay very different taxes during the abatement period.

The appeal body in Philadelphia is the Board of Revision of Taxes (BRT), and the deadline is the first Monday in October for assessment appeals. Philadelphia homeowners can also access the Longtime Owner Occupants Program (LOOP) if their assessment increased by more than 50% and they meet income and residency thresholds ^[10].

For comparison on how large metro areas handle assessment and appeals, see hennepin-county-property-tax (Minneapolis) and santa clara property tax (Silicon Valley).

What free tools and official resources can I use to estimate my Pennsylvania property tax?

You do not need to buy software or pay a service to estimate your bill. Here are the genuinely useful free resources.

County assessor parcel lookup tools. Every Pennsylvania county assessor maintains a public parcel search where you can look up any property's assessed value, owner of record, and usually recent sales history. Allegheny County's Real Estate Portal is one of the more detailed examples ^[9]. Philadelphia's property search is at property.phila.gov ^[10].

DCED Municipal Statistics. The Pennsylvania Department of Community and Economic Development publishes an annual table of all millage rates by county, municipality, and school district ^[3]. Download it, find your specific taxing bodies, add the three millage numbers together, and you have your combined rate.

PA Department of Revenue CLR list. The Department of Revenue publishes the current Common Level Ratio for every county, updated annually ^[2]. This is your most important number for an appeal.

County recorder of deeds. Recent comparable sales data is public record in Pennsylvania. You can search deeds online for most counties to find what similar homes sold for. Allegheny County, Bucks, Chester, and Montgomery have online deed search tools.

PA Property Tax/Rent Rebate program calculator. The Department of Revenue has an online tool to check rebate eligibility ^[6].

The one thing these free tools do not do is tell you whether you are over-assessed or help you build a formal appeal packet. That is where a structured approach, like using the TaxFightBack DIY Appeal Kit, saves time by combining the CLR math, comp selection, and board submission into a single workflow. But the raw data is all public and free.

Frequently asked questions

How do I calculate my Pennsylvania property tax bill?

Multiply your county-assessed value by the combined millage rate (county + municipal + school district), then divide by 1,000. For example, a $200,000 assessed value with a combined rate of 25 mills equals $5,000 per year. Subtract any Homestead Exclusion or other exemptions from the assessed value before calculating. Find your exact millage on your county assessor's website or the DCED annual municipal statistics table.

What is the average property tax rate in Pennsylvania?

Pennsylvania's average effective property tax rate is approximately 1.49% of market value, according to Tax Foundation data. That places it above the national average of roughly 1.1%. The range across counties runs from under 1.0% in rural Forest County to over 2.7% in Luzerne County, depending largely on school district millage and how recently the county conducted a reassessment.

What is the common level ratio and why does it matter?

The Common Level Ratio (CLR) is the fraction of market value that a county's assessed values represent, certified annually by the Pennsylvania Department of Revenue. If the CLR is 0.70, the county intends assessed values to equal 70% of market value. Use it to check whether your assessment implies a reasonable market value for your property. If the implied market value is too high, you have grounds to appeal.

How do I appeal my property tax assessment in Pennsylvania?

File an appeal form with your county Board of Assessment Appeals before the local deadline (August 1 in most counties; March 31 in Allegheny; first Monday in October in Philadelphia). Attach evidence: recent comparable sales, your purchase price if you bought recently, and the CLR calculation showing what your assessed value should be. Most boards hold informal hearings where you present your case without an attorney. Filing fees typically run $25 to $75.

What is the Homestead Exclusion in Pennsylvania and how do I apply?

The Homestead Exclusion, established under Act 50 of 1998 and expanded by Act 1 of 2006, reduces the assessed value of your primary residence for school district tax purposes by a district-set dollar amount, commonly $15,000 to $30,000. File a one-time application with your county assessor, generally by March 1 of the tax year you want the exclusion. The exclusion stays in place as long as the home is your primary residence.

Do rental properties get taxed differently in Pennsylvania?

The millage-rate formula is the same for rental properties as for owner-occupied homes. The key difference is that rental properties do not qualify for the Homestead Exclusion, which is reserved for primary residences. For income-producing properties, assessors may also use an income capitalization approach to value, so having your rent rolls and net operating income documented can support an appeal if the assessed value implies an unrealistic market value.

Who qualifies for Pennsylvania's Property Tax/Rent Rebate Program?

Homeowners age 65 and older, widows and widowers age 50 and older, and disabled persons age 18 and older qualify if their annual income is $35,000 or less (with 50% of Social Security excluded from that calculation). Rebates reach up to $1,000 depending on income tier. The program is administered by the Pennsylvania Department of Revenue, and applications are due by June 30 of the following year.

How often does Pennsylvania reassess property values?

There is no statewide reassessment schedule. Each county decides when to reassess, and some have not done a countywide reassessment in decades. Allegheny County's last reassessment was in 2012. Philadelphia completed one in 2023. The longer a county waits, the more the CLR drifts away from 1.0, which creates both large inequities and larger opportunities for successful appeals based on the gap between assessed and true market value.

Can a disabled veteran get a property tax exemption in Pennsylvania?

Yes. Under the Veterans' Real Property Tax Exemption Act (51 Pa. C.S. § 8904), a veteran with a 100% permanent and total service-connected disability rating may qualify for a full exemption from real estate taxes on their primary residence. The application goes through the county assessor, and the veteran's surviving spouse may also qualify. Income limits and other conditions apply, so confirm current requirements with your county.

What evidence do I need to win a Pennsylvania property tax appeal?

The strongest evidence is a recent arm's-length sale of your own property. If you paid less than what the county's CLR-implied market value suggests, that sale price alone can win the appeal. If you did not recently sell, gather three to five comparable sales of similar properties within the past 12 months, adjusted for size, condition, and distance. Calculate the CLR-indicated assessed value for your home and show it is lower than the county's figure. Include photos of condition issues if applicable.

What is the property tax appeal deadline in Allegheny County, PA?

Allegheny County's appeal deadline is March 31 of the tax year, which is earlier than almost every other Pennsylvania county. File with the Board of Property Assessment Appeals and Review. The county mails assessment change notices in January, giving homeowners roughly two months to decide and file. Missing March 31 locks you out until the following year. Check the Allegheny County website each January for any date changes.

Does Pennsylvania offer a senior citizen property tax freeze?

Pennsylvania does not have a true statewide assessment freeze for seniors, but the Property Tax/Rent Rebate Program provides annual cash rebates of up to $1,000 for qualifying seniors and disabled homeowners. Some individual municipalities and counties layer additional local programs on top of that. The state has also periodically debated broader relief legislation, so it is worth checking the Department of Revenue site each year for program updates.

How do I find my Pennsylvania property's assessed value?

Your most recent tax bill states the assessed value directly. You can also look it up for free on your county assessor's online parcel search tool. Every Pennsylvania county maintains a public database of assessed values by address or parcel ID number. Allegheny County's Real Estate Portal and Philadelphia's property.phila.gov are among the most user-friendly examples. The assessed value shown is what the county multiplies by the millage rate to calculate your bill.

What is the Clean and Green program and how does it lower property taxes?

Clean and Green, established under Act 319 of 1974, allows eligible agricultural land, forest land, and open space to be taxed based on use value rather than market value. For a farm worth $800,000 on the market but generating income equivalent to a $200,000 use-value appraisal, the tax savings can be dramatic. Enrollment is through the county assessor. Withdrawing from the program or converting the land to another use triggers rollback taxes for up to seven prior years.

Sources

1. Pennsylvania General Assembly, General County Assessment Law, 72 P.S. § 5020-101: Pennsylvania counties assess property under the General County Assessment Law; appeal deadlines and procedures are set by county ordinance within this framework
2. Pennsylvania Department of Revenue, Common Level Ratio real estate valuation factors: The Pennsylvania Department of Revenue publishes an annual Common Level Ratio for each county, certifying the ratio of assessed to market value based on actual sales
3. Pennsylvania Department of Community and Economic Development (DCED), Local Government Financial Statistics: DCED publishes annual millage rates for every Pennsylvania county, municipality, and school district
4. Tax Foundation, Property Taxes by State 2024: Pennsylvania's average effective property tax rate is approximately 1.49% of market value, above the national average of roughly 1.1%
5. Pennsylvania Department of Education / Department of Revenue, Homestead and Farmstead Exclusion (Act 50 of 1998, Act 1 of 2006): Owner-occupied primary residences qualify for the Homestead Exclusion, which reduces the assessed value used to calculate school district taxes
6. Pennsylvania Department of Revenue, Property Tax/Rent Rebate Program: The Property Tax/Rent Rebate Program provides rebates up to $1,000 for qualifying homeowners age 65 and older with income at or below $35,000; applications due June 30
7. Pennsylvania Consolidated Statutes, Veterans' Real Property Tax Exemption Act, 51 Pa. C.S. § 8904: Veterans with 100% permanent and total service-connected disability ratings may qualify for a full real estate tax exemption on their primary residence
8. Pennsylvania Department of Agriculture, Clean and Green Program (Act 319 of 1974): Agricultural and forest land enrolled in Clean and Green is taxed at use value rather than market value, with rollback taxes triggered upon conversion
9. Allegheny County, Board of Property Assessment Appeals and Review, Real Estate Portal: Allegheny County's appeal deadline is March 31; the county's last countywide reassessment was in 2012; parcel data is searchable online
10. City of Philadelphia, Office of Property Assessment: Philadelphia assesses at 100% of market value following its 2023 reassessment; appeal deadline is the first Monday in October before the Board of Revision of Taxes; LOOP and abatement programs are documented here