A single-member LLC in Pennsylvania has tax filing requirements at four levels: federal income and self-employment tax on your personal return, Pennsylvania’s 3.07% personal income tax, local earned income and sometimes business privilege taxes, and a $7 annual report to the Department of State that keeps your LLC legally alive. Sales tax and employer withholding stack on top if you sell taxable goods or hire anyone. Here is what each one asks of you and when.
Your Federal Return
The IRS treats a single-member LLC as a “disregarded entity” by default. The LLC itself files no federal income tax return. You report its revenue and expenses on Schedule C, which flows into your personal Form 1040, and the net profit is taxed at your regular federal rate.1Internal Revenue Service. About Schedule C (Form 1040), Profit or Loss from Business (Sole Proprietorship)
That same net profit also carries self-employment tax. You calculate it on Schedule SE at a combined 15.3% rate: 12.4% for Social Security on earnings up to $184,500 in 2026, plus 2.9% for Medicare on all net earnings with no cap.2Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)3Social Security Administration. Contribution and Benefit Base This runs separately from income tax, and it is what most often catches new owners off guard.
Do You Need an EIN?
A disregarded LLC with no employees and no excise tax obligations doesn’t need its own Employer Identification Number; you can use your Social Security number for federal tax purposes. Hire an employee, file excise tax returns, or need an EIN for a business bank account, and the LLC must get one.4Internal Revenue Service. Single Member Limited Liability Companies After January 1, 2009, any single-member LLC with employees must use the LLC’s name and EIN for employment tax reporting and payment.
Electing a Different Classification
Disregarded entity treatment is a default, not a requirement. Form 8832 elects corporate treatment; Form 2553 elects S corporation treatment.5Internal Revenue Service. Form 8832 – Entity Classification Election An S corp election can lower self-employment tax by splitting income between a reasonable salary and distributions. Both elections change your filing obligations substantially and are hard to reverse, so talk to a tax professional before filing one.
Pennsylvania Personal Income Tax
Your LLC’s net profit flows to your PA-40 personal return, where Pennsylvania applies a flat 3.07% rate.6Pennsylvania Department of Revenue. 2025 Pennsylvania Personal Income Tax Return Instructions The state taxes eight classes of income; business profit is one of them.7Pennsylvania Code and Bulletin. 61 Pa. Code 121.9 – Taxable Income You report it on the state’s own Schedule C alongside the PA-40.
Don’t copy your federal Schedule C numbers over. Pennsylvania doesn’t follow all federal deduction rules, and two differences matter most.8Pennsylvania Department of Revenue. PA Schedule C – Profit or Loss from Business or Profession First, Pennsylvania disallows federal bonus depreciation entirely.9Pennsylvania Department of Revenue. Pennsylvanias Handling of Federal Bonus Depreciation (Decoupling) Second, Section 179 expensing is capped at $25,000 total across all your business activities and rental properties, regardless of how much qualifying equipment you bought.10Commonwealth of Pennsylvania Department of Revenue. Net Income (Loss) from the Operation of a Business, Profession or Farm The federal Section 179 limit sits well over $1 million, so any meaningful equipment purchase forces two separate depreciation schedules for as long as the asset is in service.
Quarterly Estimated Payments
No employer is withholding tax from your business income, so you owe estimates to both the IRS and Pennsylvania on the same calendar.
Federally, you must pay estimated tax if you expect to owe $1,000 or more after withholding and credits. The 2026 deadlines are April 15, June 15, and September 15 of 2026, then January 15 of 2027.11Internal Revenue Service. Estimated Tax Weekend and holiday deadlines roll to the next business day.
Pennsylvania follows the same quarterly schedule. You owe PA estimated payments if you expect to owe at least $430 in state tax after withholding and credits, which works out to roughly $14,000 of income not subject to employer withholding.12Pennsylvania Department of Revenue. 2026 Instructions for Estimating PA Personal Income Tax There is a safe harbor: timely payments totaling at least 100% of last year’s PA tax liability (recalculated at the current 3.07% rate against last year’s net taxable income) protect you from an underpayment penalty even if you owe more for the current year.
Sales and Use Tax
If you sell or rent tangible goods or provide certain taxable services in Pennsylvania, you must register with the Department of Revenue and collect the state’s 6% sales and use tax.13Pennsylvania Department of Revenue. Sales, Use and Hotel Occupancy Tax Philadelphia adds 2% (total 8%); Allegheny County adds 1% (total 7%).14Pennsylvania Department of Revenue. Use Tax
Registration goes through myPATH, the Department of Revenue’s online system for business tax accounts.15Commonwealth of Pennsylvania. Register My Business for Taxes The Department assigns your filing frequency by sales volume. Monthly filers owe their return and payment by the 20th of the following month. Quarterly filers hit roughly the 20th of April, July, October, and January. Weekend or holiday due dates shift to the next business day.16Pennsylvania Department of Revenue. 2025 Pennsylvania Sales, Use, and Hotel Occupancy Tax Returns If none of this applies to your business, you can skip registration entirely.
Employer Withholding If You Hire
Hiring anyone, including yourself if you’ve elected S corporation treatment, triggers employer withholding registration through myPATH. You withhold the 3.07% Pennsylvania rate from wages and file quarterly reconciliation returns.6Pennsylvania Department of Revenue. 2025 Pennsylvania Personal Income Tax Return Instructions At year end, the REV-1667 Annual Withholding Reconciliation Statement and all employee W-2s are due January 31 and must be submitted together, by the same method.17Pennsylvania Department of Revenue. Annual Withholding Reconciliation Statement
Local Taxes
Pennsylvania’s local tax layer is where owners get tripped up, because the rates and rules change from one municipality to the next.
Local Earned Income Tax
Nearly every Pennsylvania municipality taxes your net business profit through a local Earned Income Tax. The combined municipal and school district rate depends on both where you live and where the business operates. Register with the Tax Collection Committee or designated collector for your area. If your home and your business sit in different jurisdictions with different rates, allocation rules decide which gets what share.
Business Privilege and Mercantile Tax
Many municipalities also tax gross receipts through a Business Privilege Tax or Mercantile Tax. This one hits total revenue, not profit, so you can owe it in a year the LLC lost money. Rates, thresholds, and exemptions vary by ordinance, and the municipality where the business physically operates is the one whose rules you follow. Some exempt businesses below a gross receipts floor; others don’t.
The Annual Report
Every Pennsylvania LLC must file an annual report with the Department of State. The window runs January 1 through September 30, and the fee is $7.18Commonwealth of Pennsylvania. Annual Reports The report asks for the business name, registered office address, principal office address, jurisdiction of formation, at least one manager or managing member, and the names of any principal officers.
Skipping it is costly. Starting with reports due in 2027, an LLC that doesn’t file is subject to administrative dissolution six months after the due date, which strips the LLC of its legal existence and the protection of its registered name.18Commonwealth of Pennsylvania. Annual Reports For $7, put a reminder on the calendar well before September 30.