Which state has the lower sales tax nexus threshold, Pennsylvania or Illinois?

Both Pennsylvania and Illinois publish the same economic nexus dollar threshold of $100,000, so a remote seller would reach each state's published threshold at the same level of in-state sales. These are the thresholds published by each state's tax authority as of 2026-05-30; confirm against the official source before registering.

Do both Pennsylvania and Illinois have marketplace facilitator laws?

Yes. Both Pennsylvania and Illinois have marketplace facilitator laws, so marketplaces such as Amazon, Etsy, and eBay collect and remit sales tax on the sales they facilitate in both states. Direct-to-consumer sales you make outside a marketplace remain your own responsibility once you cross each state's threshold. Verified 2026-05-30.

Which has the lower sales tax rate, Pennsylvania or Illinois?

Pennsylvania has the lower combined state and local sales tax rate at 6.34%, compared with 8.96% in Illinois. These are the statewide base rate plus the average local rate; the exact rate depends on the customer's delivery address. As of 2026-05-30.

Do I need to register for sales tax in both Pennsylvania and Illinois?

It depends on where you cross each state's economic nexus threshold (or have physical presence there). Pennsylvania's published threshold is $100,000, and Illinois's is $100,000. You generally register in a state only once you cross its threshold, so you may have an obligation in one, both, or neither. Run the nexus calculator with your actual sales and confirm with each state's official source. Thresholds as of 2026-05-30.

When did economic nexus take effect in Pennsylvania and Illinois?

Pennsylvania's economic nexus rule took effect on 2019-07-01, and Illinois's took effect on 2026-01-01. Both stem from the 2018 South Dakota v. Wayfair Supreme Court decision, which let states require remote sellers to collect once an economic threshold is met.

Pennsylvania vs Illinois Sales Tax Nexus — Comparison 2026

Updated 2026-05-30

Compare economic nexus thresholds, state and local rates, and filing rules in Pennsylvania and Illinois.

Metric	Pennsylvania	Illinois
Economic nexus threshold	$100,000	$100,000
Transaction threshold	None	None
State rate	6.00%	6.25%
Avg. local rate	0.34%	2.71%
Combined state + local	6.34%	8.96%
Marketplace facilitator	Yes	Yes
Effective since	2019-07-01	2026-01-01

Which state is easier for sellers?

For low-revenue sellers: nexus triggers first in both states because of its threshold. If you cross that first, you register there first.

On rate: Pennsylvania is friendlier for customers with a combined state + local rate of 6.34% vs 8.96%.

Neither state has a transaction-count trigger — only the dollar threshold matters.

Pennsylvania — nexus note

Pennsylvania sales tax nexus and economic nexus threshold: more than $100,000 in annual Pennsylvania gross sales, measured by calendar year, creates economic presence for remote sellers and marketplace facilitators (eff. 2019-07-01 under Act 13 of 2019 and Sales and Use Tax Bulletin 2019-01). Pennsylvania uses a sales-only threshold -- no transaction-count test. Gross sales include taxable and nontaxable sales across channels. A marketplace facilitator with no Pennsylvania physical presence counts both facilitated and direct Pennsylvania sales; a marketplace seller counts direct sales plus marketplace sales only when the facilitator does not collect Pennsylvania sales tax on its behalf. After the first collection year, Pennsylvania measures prior calendar-year sales and starts the annual collection period in the second quarter. The state rate is 6%, with local add-ons in Allegheny County (+1%) and Philadelphia (+2%). Pennsylvania 2026 sales/use tax filing calendars list monthly, quarterly, semi-annual, and monthly-with-prepayment filer tracks; returns are due even when no taxable transactions occur in the period. Sellers without physical presence can use a Pennsylvania-certified service provider for registration, filing, collection, and remittance support. Pennsylvania DOR source data last retrieved 2026-05-30.

Illinois — nexus note

Illinois sales tax nexus and economic nexus threshold: beginning January 1, 2026, a remote retailer is subject to Illinois state and local Retailers' Occupation Tax when it has $100,000 or more in cumulative gross receipts from sales of tangible personal property to Illinois purchasers during the lookback period. The prior 200-transaction threshold applied from 2021 through 2025 but no longer applies for 2026 and later periods. Remote retailers and marketplace facilitators determine the threshold quarterly for the preceding 12-month period, and destination-based local ROT generally applies when the sale is sourced outside Illinois.

What to do next

Use the nexus calculator to check exactly which of Pennsylvania and Illinois you've already triggered. Then read each state's full guide:

Pennsylvania overview →Illinois overview →

Frequently asked questions

Which state has the lower sales tax nexus threshold, Pennsylvania or Illinois?: Both Pennsylvania and Illinois publish the same economic nexus dollar threshold of $100,000, so a remote seller would reach each state's published threshold at the same level of in-state sales. These are the thresholds published by each state's tax authority as of 2026-05-30; confirm against the official source before registering.
Do both Pennsylvania and Illinois have marketplace facilitator laws?: Yes. Both Pennsylvania and Illinois have marketplace facilitator laws, so marketplaces such as Amazon, Etsy, and eBay collect and remit sales tax on the sales they facilitate in both states. Direct-to-consumer sales you make outside a marketplace remain your own responsibility once you cross each state's threshold. Verified 2026-05-30.
Which has the lower sales tax rate, Pennsylvania or Illinois?: Pennsylvania has the lower combined state and local sales tax rate at 6.34%, compared with 8.96% in Illinois. These are the statewide base rate plus the average local rate; the exact rate depends on the customer's delivery address. As of 2026-05-30.
Do I need to register for sales tax in both Pennsylvania and Illinois?: It depends on where you cross each state's economic nexus threshold (or have physical presence there). Pennsylvania's published threshold is $100,000, and Illinois's is $100,000. You generally register in a state only once you cross its threshold, so you may have an obligation in one, both, or neither. Run the nexus calculator with your actual sales and confirm with each state's official source. Thresholds as of 2026-05-30.
When did economic nexus take effect in Pennsylvania and Illinois?: Pennsylvania's economic nexus rule took effect on 2019-07-01, and Illinois's took effect on 2026-01-01. Both stem from the 2018 South Dakota v. Wayfair Supreme Court decision, which let states require remote sellers to collect once an economic threshold is met.

Sources

date_retrieved: Pennsylvania 2026-05-30 · Illinois 2026-05-22