Excellent
7,486 reviews
Before going into the details, here is your quick checklist for starting an S Corp in Pennsylvania.
An S corporation is a federal tax classification under Subchapter S of the Internal Revenue Code. It is not a standalone business structure.
An eligible Pennsylvania LLC or C corporation files IRS Form 2553 to request S corp status. Once approved, the business does not pay federal corporate income tax on its profits. Instead, income and losses pass through directly to shareholders' personal tax returns, where they are taxed at the individual level.
To start an S corporation in Pennsylvania, you first form a business entity, either an LLC or a C corporation, through the Pennsylvania Department of State. After your entity is active, you file Form 2553 with the IRS within the required deadline.
Pennsylvania recognizes the federal S corp election, and doesn’t require any separate state-level filing. Unlike C corporations, which pay Pennsylvania's 7.49% Corporate Net Income Tax on business profits, S Corps pass income through to shareholders. Those shareholders then pay tax at Pennsylvania's 3.07% flat personal income tax rate.
One exception applies: If a Pennsylvania S corporation has recognized built-in gains from a prior C corporation period, those gains may be subject to Pennsylvania corporate net income tax at the entity level.
Filing Form 2553 on time is one of the most important steps in the process. Miss the window and your election will not take effect until the following tax year.
| Scenario | Deadline | Effective Tax Year |
|---|---|---|
| Existing business, calendar year | March 16, 2026 | 2026 |
| New business formed January 15, 2026 | April 1, 2026 | 2026 |
| New business formed June 1, 2026 | August 15, 2026 | 2026 |
| Filed during prior year (2025) | December 31, 2025 | 2026 |
For existing calendar-year businesses, IRS rules require you to file Form 2553 by the 15th day of the third month of the tax year. In 2026, March 15 falls on a Sunday, so the deadline shifts to March 16, 2026.
New businesses have 2 months and 15 days from their formation date to file. Miss that window, and you will need to request a late election with a reasonable cause statement, or wait until the following tax year for the election to take effect.
If you wanted your S corp election to take effect at the start of 2026, you could have filed Form 2553 at any point during calendar year 2025. For all 2026 filings, use the deadlines above.
LLC members who do not elect S corp status pay self-employment tax (15.3%) on all net profits from the business. With an S corp election, you split your income between a W-2 salary and distributions. Only your salary is subject to payroll taxes. Distributions are not, which can produce meaningful savings at higher income levels.
As an S Corp owner, you pay yourself a reasonable salary for the work you do in the business. Any remaining profits can then be taken as distributions. Distributions are not subject to self-employment taxes, which allows you to keep more of what your business earns while staying fully compliant with IRS requirements.
The Tax Cuts and Jobs Act allows qualifying S corp owners to deduct up to 20% of their qualified business income (QBI) from their personal tax returns under Section 199A. Distributions from an S corp may qualify for this deduction, reducing your taxable income further. W-2 salary payments do not qualify, so structuring your compensation correctly matters. [2]
Pennsylvania S corp shareholders pay state income tax at the flat 3.07% personal income tax rate on pass-through profits. That is significantly lower than the 7.49% Corporate Net Income Tax rate that applies to C corporation income at the entity level. Electing S corp status lets you take advantage of that lower rate on your business earnings.
Electing S corp status does not change your LLC's legal structure, operating agreement, or management setup. Your members run the business exactly as before. You keep the same liability protection and operational control. The only change is how the IRS treats your business income, not how Pennsylvania recognizes your legal entity.
A C corporation pays federal income tax and Pennsylvania's 7.49% Corporate Net Income Tax on its profits at the entity level. When those profits are distributed to shareholders as dividends, shareholders pay income tax a second time on their personal returns. An S corp election eliminates this second tax layer. Profits pass through directly to shareholders and are only taxed once at the individual level.
S corp shareholders can deduct business losses on their personal tax returns, up to the amount of their basis in the company. C corporation shareholders have no equivalent benefit; losses stay at the corporate level. This pass-through of losses is particularly valuable during startup years or periods of lower revenue.
C corporations that retain earnings beyond reasonable business needs may be subject to the IRS accumulated earnings tax. S corporations avoid this penalty because profits pass through to shareholders each year rather than accumulating at the entity level. This gives Pennsylvania S corp owners more flexibility in how they manage earnings without triggering additional federal tax exposure.
C corporations file Form 1120 and manage corporate-level taxes separately from their shareholders' personal returns. S corporations file Form 1120-S, and each shareholder receives a Schedule K-1 reporting their share of income or loss. Many business owners find the S corp pass-through structure more manageable at tax time compared to maintaining separate corporate and personal tax layers.
Selling a C corporation can trigger taxation at two levels: the corporation pays tax on the gain from an asset sale, and shareholders pay tax again on distributions. An S corp election can allow a sale to be structured to avoid this double layer of tax on the gain, potentially increasing after-tax proceeds when Pennsylvania business owners plan an exit or ownership transfer.
An S corp is a tax classification, not a standalone entity. You must have an active Pennsylvania LLC or C corporation registered with the state before you can file your IRS election. Here is how the full process works.
If you do not already have a registered Pennsylvania business entity, your first step is to form one. Choose the structure that fits your business goals. An LLC is simpler to maintain and works well for most small business owners. A C corporation is a better fit if you need to attract investors or issue multiple classes of stock.
Forming an LLC before your S Corp election is the most common path. Pennsylvania LLC filings go through the Pennsylvania Department of State. Here are the key steps:
For a full walkthrough of each step, visit our How to Start an LLC in Pennsylvania guide.
If you need a corporate structure before your S Corp election, here are the steps to form a C Corp in Pennsylvania:
For a complete walkthrough, visit our How to Start a C Corporation in Pennsylvania guide.
Already have an active Pennsylvania LLC or C corporation? Skip directly to Step 2.
Once your Pennsylvania LLC or C corporation is active, you file IRS Form 2553, the Election by a Small Business Corporation, to officially request S corp tax treatment from the IRS. This single form changes how the federal government taxes your business income from that point forward. Pennsylvania state recognizes the federal election, so no separate state filing is required with the Pennsylvania Department of State or the Pennsylvania Department of Revenue.
Form 2553 collects the following information:
All shareholders must sign the consent portion of the form before it is submitted. An unsigned form will be rejected by the IRS.
You can submit Form 2553 by mail or fax. There is no filing fee.
Faxing is typically faster than mailing. Keep your fax confirmation receipt. The IRS will send a CP261 acceptance notice to confirm your S corporation election. If your election is not accepted, you will receive a letter explaining the issue. [3]
If you file after the standard deadline, you may still be eligible for a late election under IRS Revenue Procedure 2013-30, provided you meet certain requirements. See the section below on what to do if you miss the deadline.
After your S corp election is in place, you may need to register with the Pennsylvania Department of Revenue using Form PA-100 through myPATH to set up applicable state tax accounts, such as employer withholding or sales tax, if required
Why You Need to Register
You can complete the PA-100 registration online through the Pennsylvania Department of Revenue's myPATH portal. Registration is required even though S corporations do not pay entity-level income tax in Pennsylvania, because the state still requires annual pass-through reporting.
Once your S corp election takes effect, IRS rules require you to pay yourself a W-2 salary if you work in the business. This is not optional. Owner-employees of S corporations cannot simply take all their compensation as distributions.
The IRS expects your salary to reflect what someone performing similar work, in the same industry, and in the same region would typically earn. There is no fixed formula, but the IRS flags S corps where owner salaries appear unusually low relative to distributions.
Setting your salary too low risks the IRS reclassifying distributions as wages, which would make them subject to payroll taxes. Setting it too high means you are paying more in payroll taxes than necessary.
Payroll adds ongoing administrative requirements to your business. Many Pennsylvania S Corp owners work with a payroll provider or accountant from day one to keep their compliance records clean and accurate.
Every S corporation files its own federal tax return each year using IRS Form 1120-S. This is a separate return from your personal Form 1040, and it is due by March 16, 2026, for calendar-year S corporations. Each shareholder receives a Schedule K-1 showing their individual share of income or loss, which they use to complete their personal federal tax returns.
Pennsylvania requires S corporations to file Form PA-20S/PA-65, the Pennsylvania S Corporation/Partnership Information Return, each year.
Key details for the PA-20S/PA-65:
Extension: A six-month extension is available by filing a request by the original due date. The extension moves the filing deadline to October 15 for calendar-year filers, but does not extend the time to pay any tax owed
Built-in gains exception: If your S corp has built-in gains from the time it was a C corporation, those gains may be subject to Pennsylvania's Corporate Net Income Tax at the entity level. This applies only in specific situations, not to regular operating income
After the PA-20S/PA-65 is filed, each shareholder receives a PA Schedule RK-1 or NRK-1 showing their share of S corp income. Shareholders use this to complete their Pennsylvania personal income tax return (Form PA-40), which is due April 15. Pass-through income is taxed at Pennsylvania's flat 3.07% personal income tax rate.
Once your S corp is active, there are ongoing requirements to stay in good standing. Here is what applies specifically to Pennsylvania S corporations.
S corporations file Form 1120-S with the IRS each year by March 15 for calendar-year filers (March 16 in 2026 because March 15 falls on a Sunday). This return reports total income, deductions, and credits, and issues Schedule K-1 to each shareholder. A six-month extension is available by filing IRS Form 7004 by the original deadline. The extension moves the filing deadline to September 15, 2026, but does not extend your time to pay any tax owed. [5]
Your Pennsylvania S corp must file Form PA-20S/PA-65 with the Pennsylvania Department of Revenue each year by April 15 for calendar-year filers. This return reports each shareholder's share of pass-through income. Missing the deadline can result in penalties. An extension request filed by April 15 extends the filing date to October 15.
All businesses registered with the Pennsylvania Department of State must now file an Annual Report to stay in good standing. The deadlines are based on your entity type. The annual reports of corporations are due by June 30. For LLCs, the deadline is September 30, and for other entities, it is December 31 each year.
The IRS requires S corp owner-employees to receive a reasonable salary for work performed in the business. This salary is subject to payroll taxes. The IRS scrutinizes compensation levels in S Corp audits. Underpaying yourself to maximize distributions is one of the most common compliance issues the IRS reviews.
S corp owners who work in the business must be on the payroll. Federal employment taxes are deposited on a quarterly schedule using Form 941. If your Pennsylvania S corp has employees, you must register with the Pennsylvania Department of Labor and Industry for unemployment compensation tax and remit contributions on schedule.
Pennsylvania does not require a general state business license, but many industries require licenses or permits through specific state agencies. Check the Pennsylvania Department of State, the relevant professional licensing board, and your local county or municipality to confirm what applies to your specific business. Philadelphia and other Pennsylvania cities may also have local business privilege tax requirements.
Missing the IRS filing deadline does not automatically end your options. The IRS provides a path for late elections under Revenue Procedure 2013-30, as long as certain conditions are met.
To qualify for late election relief, your business must meet the following:
If you miss the March 16, 2026, deadline for the current tax year, your S corp election may still apply to 2026 if you file with a valid, reasonable cause explanation.
For LLCs filing a late election, you may also need to file IRS Form 8832 (Entity Classification Election) alongside Form 2553. This step is required when an LLC needs to first elect corporate tax treatment before the S corp designation can apply.
Late elections involve additional IRS review. Many business owners work with a formation service or tax professional to make sure the paperwork is complete and the reasonable cause statement is properly written before submission.
Circumstances change. There may come a point when S corp status no longer fits your business, and revoking the election is the right move.
To revoke the election, shareholders holding more than 50% of the company's stock must file a written revocation statement with the IRS service center where Form 2553 was originally submitted. There is no IRS form for this. It is a letter sent to the same Ogden, UT address used for Form 2553.
File the revocation on or before March 16 of the current tax year (for calendar-year businesses), and it takes effect for that year. File it after that date, and the revocation takes effect the following year.
Once an S corp election is revoked, the entity generally cannot re-elect S corp status for five years without IRS consent.
If any of these situations apply to your Pennsylvania business, it is worth reviewing your tax designation with a qualified accountant before filing a revocation.
Internal Revenue Service. About Form 2553, Election by a Small Business Corporation. Accessed on April 30, 2026.
Internal Revenue Service. Qualified Business Income Deduction. Accessed on April 30, 2026.
Internal Revenue Service. Understanding Your CP261 Notice. Accessed on April 30, 2026.
Internal Revenue Service. Form 941, Employer's Quarterly Federal Tax Return. Accessed on April 30, 2026.
Internal Revenue Service. About Form 7004, Application for Automatic Extension of Time. Accessed on April 30, 2026.
Pennsylvania Department of Revenue. Capital Stock and Foreign Franchise Tax. Accessed on April 30, 2026.
myPATH. Online portal for business tax registration (PA-100), filing PA-20S/PA-65, and managing Pennsylvania tax accounts
Pennsylvania Department of State. Entity formation, name search, Certificate of Organization, Articles of Incorporation, and all Department of State filings
Pennsylvania Department of Revenue. Guidance on pass-through tax treatment, PA-20S/PA-65 filing requirements, and shareholder reporting
Pennsylvania Department of Labor and Industry, Unemployment Compensation: Register for Pennsylvania unemployment compensation tax if your S corp has employees
IRS, Where to File Form 2553: Current mailing addresses and fax numbers by state
IRS, S Corporations Overview: Federal S Corp requirements, compliance, and tax treatment
IRS, Free EIN Application: Apply for your federal Employer Identification Number at no charge
Pennsylvania Small Business Development Center (SBDC): Free advising, training, and resources for Pennsylvania small business owners
U.S. Small Business Administration, Pennsylvania District Office: Federal loans, grants, and business development programs for Pennsylvania businesses
USPTO, Federal Trademark Registration: Protect your business name and brand at the federal level
