TITLE: Pennsylvania Local Sales Tax Moves to Destination Sourcing Under Act 21 of 2026
What is changing in Pennsylvania?
Pennsylvania is changing how local sales tax applies to taxable sales delivered to Philadelphia and Allegheny County, home of Pittsburgh.
Under Act 21 of 2026, local sales tax is moving from origin sourcing to destination sourcing. The Pennsylvania Department of Revenue will begin enforcing the new approach on 1 October 2026.
For international sellers, the practical rule is simple:
If you must collect Pennsylvania’s 6% sales tax, you must apply the correct Philadelphia or Allegheny County local tax based on the customer’s delivery address.
Pennsylvania has a 6% statewide sales tax. Only two local jurisdictions add a local sales tax:
- Philadelphia: 2% local tax, creating an 8% combined rate.
- Allegheny County: 1% local tax, creating a 7% combined rate.
- All other Pennsylvania locations: 6% state tax only.
Before Act 21, local tax was generally sourced according to the seller’s location.
That meant:
- A Philadelphia-based seller charged the 2% Philadelphia local tax on taxable Pennsylvania sales, including deliveries outside Philadelphia.
- A seller based outside Philadelphia did not generally charge Philadelphia’s 2% local tax on taxable goods delivered into Philadelphia.
- An Allegheny County seller charged the 1% local tax based on the origin rules then in place.
From 1 October 2026, local tax follows the delivery address instead.
A taxable delivery to Philadelphia is generally subject to 8%. A taxable delivery to Allegheny County is generally subject to 7%. A taxable delivery to Reading or another Pennsylvania location outside those jurisdictions remains subject to the 6% state rate alone.
The change does not alter which products or services are taxable. It changes where the local tax applies.
Effective date and enforcement date are different
Act 21 became law in July 2026. Its legal effective date is retroactive to tax years beginning after 31 December 2025, meaning the rule technically applies from 1 January 2026.
However, the Pennsylvania Department of Revenue has provided a soft landing. It will not begin enforcing the destination-sourcing rules until 1 October 2026, giving businesses time to update systems and processes.
This creates two dates you must track:
- 1 January 2026: The retroactive legal effective period begins.
- 1 October 2026: The Department of Revenue begins enforcement.
Do not treat the enforcement delay as a cancellation of the earlier legal period. Review your 2026 transactions and keep clear records of how you assessed and handled the January-to-September period. If your historic calculations appear incorrect, document the issue and obtain current instructions from the Pennsylvania Department of Revenue before correcting filings or remitting additional tax.
Who is affected by the Pennsylvania rule?
The change affects:
- Businesses located in Pennsylvania.
- Sellers in Philadelphia or Allegheny County shipping to other Pennsylvania addresses.
- Sellers elsewhere in Pennsylvania shipping into Philadelphia or Allegheny County.
- Interstate and remote sellers with Pennsylvania sales tax obligations.
- International sellers with Pennsylvania economic nexus.
- Sellers using Amazon, Shopify, eBay, Etsy, WooCommerce or other sales channels.
Pennsylvania’s economic nexus threshold is $100,000 in gross Pennsylvania sales in a calendar year. Once an out-of-state business has economic presence, it generally must register, collect and remit Pennsylvania sales tax on taxable transactions.
For a UK, US, EU, Canadian or Australian seller, the key question is not whether the business is located near Philadelphia. The key questions are:
- Do you have Pennsylvania sales tax nexus?
- Is the sale taxable?
- Where is the product or service delivered?
- Who is responsible for collecting and remitting the tax?
Why this matters to international ecommerce sellers
A UK-based seller shipping from an overseas warehouse into Philadelphia has no Pennsylvania origin location to use for local sourcing. Once the seller has Pennsylvania collection obligations, the customer’s delivery address becomes the essential tax data point.
This is particularly important for sellers that:
- Operate a Shopify or WooCommerce store.
- Sell through Amazon, eBay or Etsy.
- Use third-party fulfilment.
- Ship from the UK, Europe, Canada or Australia.
- Sell through a US entity while managing accounting from the UK.
- Combine marketplace sales with direct-to-consumer sales.
Do not assume that a marketplace facilitator solves every Pennsylvania obligation. Platforms may collect tax on facilitated transactions, but you must still understand:
- Which transactions the marketplace collected.
- Whether the correct local rate was applied.
- How marketplace sales are treated in your Pennsylvania nexus calculation.
- Whether your direct website sales are being calculated correctly.
- Whether your reports support your Pennsylvania filings.
Direct-to-consumer sales through your own Shopify or WooCommerce website remain your operational responsibility unless another approved collection arrangement applies.
This is where structured Shopify accounting UK, Amazon FBA accounting UK and ecommerce bookkeeping UK processes can help. Your accounting workflow should connect order data, delivery addresses, marketplace reports, tax collected and filing records.
Worked example: Philadelphia, Pittsburgh and Reading
Assume your business sells a taxable product for $100 and is required to collect Pennsylvania sales tax.
| Delivery address | State tax | Local tax | Total tax | Customer total |
|---|---|---|---|---|
| Philadelphia | 6% = $6 | 2% = $2 | $8 | $108 |
| Pittsburgh, Allegheny County | 6% = $6 | 1% = $1 | $7 | $107 |
| Reading | 6% = $6 | None | $6 | $106 |
The seller’s location does not determine the local rate under the new rule. The delivery address does.
For a Shopify store, the tax engine should identify whether the delivery address is in Philadelphia, Allegheny County or another part of Pennsylvania. The same logic should apply when your order data is exported for reconciliation and filing.
Complete this compliance checklist before 1 October
Use the following checklist to prepare your business.
1. Confirm your Pennsylvania nexus position
Review your Pennsylvania gross sales for the current and prior calendar year. Include sales from relevant channels and confirm whether you have crossed the $100,000 economic nexus threshold.
If you have nexus, confirm that your registration and collection process is active. Doing this early helps you update tax logic, run test orders and verify that the correct Philadelphia or Allegheny County rate is being applied before enforcement begins.
