PA announces new common level ratios used for assessment appeals

The Pennsylvania State Tax Equalization Board has released updated common level ratios (CLR), which are county-specific percentages used to convert assessed values into market values. These ratios are primarily used during tax assessment appeals, but also apply to Realty Transfer Tax (RTT) calculations in certain circumstances — for example, when a property's sale price is not clearly stated or does not reflect market value. For RTT purposes, the updated CLR factors apply to documents accepted between July 1, 2026, and June 30, 2027. The CLRs for the Philadelphia region are:

• Bucks County: 5.6% of market value
• Chester County: 30.6% of market value
• Delaware County: 54.6% of market value
• Montgomery County: 29.8% of market value
• Philadelphia County: 94.3% of market value

*8/3/2026 update: The percentages were updated slightly to reflect the State Tax Equalization Board values, instead of being based on the valuation factors released by the Department of Revenue.