Pennsylvania Income & Tax for eCommerce Businesses

💡 Two Parallel Systems: Pennsylvania has both a Corporate Net Income Tax (one of the highest in the U.S.) and a Sales & Use Tax system. Both can apply to out-of-state eCommerce sellers with different nexus triggers. This article covers both, with a teaser of our upcoming State Sales Tax service at the end.

Part 1: Pennsylvania Corporate Net Income Tax (CNIT)

Pennsylvania imposes a Corporate Net Income Tax (CNIT) of 9.99% on C corporations with nexus in the state — one of the highest corporate income tax rates in the country. While Pennsylvania has been gradually reducing this rate (it was 11.99% as recently as 2022), it remains significantly above the national average.

The CNIT applies to corporations — not to S corporations, LLCs taxed as partnerships, or sole proprietors, which generally pay through the individual income tax system instead.

What Creates CNIT Nexus in Pennsylvania?

Pennsylvania uses both a physical presence standard and an economic nexus standard to determine whether a business owes corporate income tax:

Physical Nexus Triggers

• Having employees or contractors performing services in Pennsylvania

• Maintaining an office, warehouse, or other place of business in the state

• Owning, leasing, or using property in Pennsylvania — including inventory stored in Amazon FBA fulfillment centers

• Having a remote employee working from a Pennsylvania address (even occasionally)

Economic Nexus

Pennsylvania's Department of Revenue has adopted economic nexus standards for corporate income tax purposes as well. A business can have CNIT nexus based on a substantial economic presence in the state, even without physical ties — particularly if it is generating significant revenue from Pennsylvania customers on an ongoing basis.

Note: The exact thresholds for economic nexus under Pennsylvania's CNIT are less bright-line than for sales tax. If your business has substantial, regular Pennsylvania sales but no physical presence, a nexus review with a qualified tax advisor is strongly recommended.

PL 86-272 Protection in Pennsylvania

Federal Public Law 86-272 can protect C corporations from Pennsylvania CNIT if their only in-state activity is soliciting orders for tangible goods that are approved and shipped from outside Pennsylvania. However:

• Inventory stored in a Pennsylvania warehouse or FBA center removes this protection

• Employees or contractors doing anything beyond pure order solicitation in Pennsylvania removes this protection

• PL 86-272 does not apply to sales tax obligations — those are governed by entirely separate rules

Part 2: Pennsylvania Sales Tax — The $100,000 Threshold

For most eCommerce sellers — especially those structured as LLCs or S corps — Pennsylvania's Sales & Use Tax is the more immediate concern.

Economic Nexus Threshold

Pennsylvania implemented economic nexus for remote sellers effective July 1, 2019. The rules are:

• Threshold: $100,000 in gross sales into Pennsylvania in the previous calendar year

• No transaction count requirement — revenue only

• Gross sales include taxable, exempt, and nontaxable sales — even wholesale transactions count toward the threshold

• Marketplace sales through certified facilitators like Amazon are excluded from your individual threshold if the marketplace is already collecting and remitting tax on those sales

When Do Collection Obligations Begin?

Pennsylvania's schedule is slightly different from most states: if you cross $100,000 in calendar year 2024, your collection obligation begins April 1, 2025 — not immediately. This gives sellers time to prepare, but means you must monitor prior-year sales closely each January.

Pennsylvania's Unique Option: Notice & Reporting

Pennsylvania offers an alternative to collecting sales tax for sellers below the threshold: you can elect to comply with a "Notice and Reporting" requirement instead of registering to collect. This means notifying customers that use tax may be due and reporting customer information to the state. This election must be made by March 1 of each year. Most sellers find it simpler to just register and collect, but the option exists.

Sales Tax Rates in Pennsylvania

Pennsylvania's base state sales tax rate is 6%. Two exceptions apply:

• Allegheny County (Pittsburgh area): 7% (1% local surtax)

• Philadelphia: 8% (2% local surtax)

FBA Sellers: Pennsylvania Inventory Creates Nexus

Amazon operates major fulfillment centers in Pennsylvania. If you use FBA, your inventory may be stored in the state — creating immediate physical nexus for both CNIT (if you're a C corp) and sales tax purposes, regardless of your revenue level.

Pennsylvania is known for active auditing of out-of-state sellers. If you have FBA inventory in Pennsylvania and haven't registered for sales tax, this is a risk worth addressing proactively.

What About Sales Tax?

Pennsylvania's $100,000 sales tax threshold, its inclusion of wholesale and exempt sales in the calculation, and its unusual April 1 collection start date make it one of the more nuanced states for eCommerce sellers.

At Tall Oak Advisors, we put together this guide as a resource for our eCommerce community. Tax rules vary significantly from state to state, and we want sellers to have the information they need to make informed decisions. More info at talloakadvisors.com

Disclaimer: The information in this article is for general informational purposes only and does not constitute legal or tax advice. Tax laws change frequently. Please consult a qualified tax advisor or CPA regarding your specific situation.

Sources: Pennsylvania Corporate Net Income Tax (72 P.S. § 7401 et seq.); Pennsylvania Department of Revenue; PA Sales Tax Economic Nexus (Act 13 of 2019, eff. July 1, 2019); Pub. L. No. 86-272; Pennsylvania myPATH Registration Portal.