Pennsylvania Sales Tax Filing Deadlines 2026: Monthly, Quarterly & Semi-Annual Due Dates

2026 Monthly Filing Deadlines

2026 Quarterly Filing Deadlines

2026 Semi-Annual Filing Deadlines

PA Sales Tax Filing Deadlines by Filing Frequency

Your assigned filing frequency determines not just when you file but how Pennsylvania expects you to manage cash flow, prepayments, and recordkeeping. The PA Department of Revenue sets your frequency from the sales tax you reported in the third calendar quarter (July–September) of the prior year, reviews it each November, and may reassign you for the next calendar year — so your schedule can change. Pennsylvania uses three frequencies only: monthly, quarterly, and semi-annual. There is no annual filing option.

Monthly Filers (third-quarter tax $600 or more)

Monthly filers represent the largest group of remote sellers with PA nexus. Returns and payment are both due by the 20th of the month following the reporting period. Monthly filers above certain liability thresholds are also subject to PA's accelerated sales tax (AST) prepayment rule: if your actual tax liability for the third calendar quarter of the prior year was $25,000 or more, you must prepay 50% of the same month's prior-year tax by the 20th of the current month, with the balance due with the regular return. (PA calls this AST Level 1 at $25,000–$100,000 and Level 2 at $100,000 or more for the quarter; the prepayment is 50% at both levels.)

Practical implication: monthly filers who scale past $25K/month should plan cash flow for two PA payments per month — the AST prepayment and the regular return — once the prepayment trigger is hit.

Quarterly Filers (third-quarter tax $75–$599.99)

Quarterly filers report on calendar quarters: Q1 (Jan–Mar), Q2 (Apr–Jun), Q3 (Jul–Sep), Q4 (Oct–Dec). Each quarter's return is due by the 20th of the month following the quarter close. Quarterly filers are notsubject to the AST prepayment rule.

New registrants are typically placed on quarterly status by default. PA reassesses after 12 months of filing history.

Semi-Annual Filers (third-quarter tax under $75)

Semi-annual filers report twice a year, and this is the least frequent schedule Pennsylvania offers — there is no annual sales tax return. The first period covers January through June (return due August 20) and the second covers July through December (return due February 20 of the following year, with weekend adjustment). This frequency is most common for small sellers with steady but limited PA volume. Note that PA re-evaluates semi-annual filers on combined collections from the second half of the prior year plus the first half of the current year, and moves you up to quarterly (over $300) or monthly (over $2,400) if you cross those amounts.

What Happens if You Cross a Frequency Threshold?

If the tax you report grows past your assigned tier, you continue filing on your current schedule until PA formally reassigns you (typically with a written notice for the next calendar year, following the November review). You can also request a voluntary frequency change through myPATH if your business has shifted materially.

Next PA Sales Tax Deadlines

What Counts as Liability for Frequency Assignment

When PA sets or resets your filing frequency, it looks at the actual sales tax you reported for the third calendar quarter (July 1 – September 30) of the prior year — the tax on your taxable sales, not your gross sales. The Department runs a frequency-change review every November and assigns your schedule for the next calendar year from that third-quarter figure.

Example: report $2,000 of PA sales tax for July–September and you clear the $600 monthly threshold with room to spare; report $120 and you land in the $75–$599.99 quarterly band; report under $75 and you file semi-annually. There is no lower tier — semi-annual is as infrequent as PA sales tax filing gets.