The four collar counties surrounding Philadelphia — Montgomery, Delaware, Bucks, and Chester — are among the most affluent in Pennsylvania and consistently rank among the highest property tax jurisdictions in the state. Residents here often commute to Philadelphia or work in the suburban office and biotech corridor along Routes 202, 30, and 422. Their tax situations share common threads: high property values, significant SALT cap exposure, and frequent interaction with Philadelphia’s wage tax.
Property Taxes: High Bills, SALT Cap Crunch
The Philadelphia collar counties have some of Pennsylvania’s highest property tax bills:
| County | Typical Annual Property Tax | Notes |
|---|---|---|
| Chester County | $5,500 – $10,000 | Among PA’s lowest effective rates but high values |
| Montgomery County | $5,000 – $12,000 | Wide range across 62 municipalities |
| Bucks County | $4,500 – $10,000 | Lower in northern Bucks, higher near Philadelphia |
| Delaware County | $4,500 – $9,000 | Generally moderate; urban areas lower value |
The federal SALT cap of $10,000 limits the combined deduction for state income taxes and property taxes. With PA’s 3.07% state income tax, a collar county resident earning $90,000 pays roughly $2,763 in PA state income tax — leaving $7,237 of their SALT cap for property taxes. Most collar county homeowners with average property tax bills are at or near the federal cap, meaning they can’t deduct the full amount they pay.
As with all Pennsylvania counties: property taxes are not deductible on the PA state return at all. The federal SALT cap is the only place they provide any tax benefit.
Philadelphia Commuters: The Wage Tax Credit on the PA Return
Collar county residents who commute into Philadelphia for work pay Philadelphia’s non-resident wage tax of 3.44% on their Philadelphia wages. Pennsylvania provides a credit on the PA-40 for local taxes paid to other jurisdictions — so collar county residents who also pay their home municipality’s EIT (typically 1%–2%) can claim a credit for the Philadelphia wage tax paid, up to the amount of their home district’s rate.
In practice, this means a Lower Merion Township resident (Montgomery County) earning $100,000 in Philadelphia pays:
Philadelphia non-resident wage tax: 3.44%
Lower Merion/Ardmore EIT rate: ~1.25% (resident rate)
PA credit on PA-40: up to 1.25% of PA taxable income earned in Philadelphia
If you commute to Philadelphia, make sure your employer is withholding both correctly and that your PA return is claiming the credit for Philadelphia wage tax paid.
Montgomery County: The Biotech and Pharma Corridor
Montgomery County is home to an enormous concentration of pharmaceutical and biotech companies — GSK, Merck, AstraZeneca, Pfizer’s eastern operations, and hundreds of contract research organizations along Routes 202 and 76. This creates a large population of highly paid W-2 employees and 1099 research contractors.
- Stock and RSU compensation: Many pharma employees receive restricted stock units (RSUs). When RSUs vest, they’re taxable as ordinary compensation at federal, PA (3.07%), and local EIT rates. Many employees are surprised to find PA taxes vesting events even when federal withholding seems adequate.
- PA unreimbursed employee expenses: Lab equipment, required safety certifications, and professional memberships that employers don’t cover are deductible on the PA-40 — reducing 3.07% PA tax on those amounts.
- 1099 contractors in pharma: Contract research associates, clinical trial coordinators, and regulatory consultants filing Schedule C can deduct all ordinary business expenses at the federal level including home office, equipment, and professional development.
Chester County: Equestrian Properties and Agricultural Land
Chester County’s Brandywine Valley has a significant equestrian and agricultural community. Horse properties and working farms may qualify for Clean and Green (Act 319) preferential assessment — similar to NJ farmland assessment — which dramatically lowers property taxes based on use value rather than market value. When a Clean and Green property is sold or converted to non-agricultural use, rollback taxes for up to seven years may apply.
Boarding facilities, riding schools, and horse farms operating as businesses can deduct farm and equine business expenses on Schedule F (farming) or Schedule C, including feed, veterinary costs, equipment, and facility maintenance.
Bucks County: New Hope, Doylestown, and the Delaware River Towns
Bucks County has a significant small business and creative economy — art galleries, boutique retail, restaurants, and tourism-related businesses in New Hope, Lambertville-adjacent communities, and Doylestown. Self-employed Bucks County residents have the full range of federal Schedule C deductions available, plus the PA unreimbursed expense deduction for any W-2 side income.
Bucks County also has a notable commuter population to Trenton, NJ and Princeton — residents who work across the Delaware River pay New Jersey non-resident income tax on NJ-sourced wages, and claim a PA credit for taxes paid to other jurisdictions. PA and NJ have a reciprocity agreement that simplifies filing for many cross-border workers.
The PA/NJ Reciprocity Agreement
Pennsylvania and New Jersey have a reciprocal income tax agreement: residents of one state who work in the other state pay income tax only to their home state. A Bucks County, PA resident who works in Trenton, NJ pays PA income tax (3.07%) on those wages — not NJ income tax — and vice versa for NJ residents working in PA. This eliminates the dual-state filing burden for most PA/NJ cross-border commuters (though local EIT in both states is still assessed separately).
Delaware County: Working-Class Communities and Refinery Workers
Delaware County spans from the affluent Main Line suburbs (Haverford, Swarthmore, Media) to working-class communities in Chester, Darby, and Collingdale. The county’s economic diversity creates very different tax profiles:
- Chester and Darby: Lower incomes, lower home values, higher likelihood of qualifying for the federal Earned Income Tax Credit and the new Working Pennsylvanians Tax Credit (PA’s state EITC).
- Main Line suburbs: High incomes, high home values, SALT cap fully utilized, standard deduction likely beats itemizing for many households.
- Trade and refinery workers: Significant tool and equipment expenses, union dues (no longer deductible federally for W-2, but PA still allows unreimbursed employee expenses on the PA-40).