Pennsylvania Form RCT-101 is the annual corporate net income tax report that every corporation doing business in the Commonwealth files to calculate and pay its state tax. You start from your completed federal return, apply Pennsylvania adjustments, apportion multistate income using a single sales factor, apply the current rate (7.49 percent for tax years beginning in 2026), and submit the package electronically through myPATH at mypath.pa.gov.1Pennsylvania Department of Revenue. Corporate Net Income Tax A calendar-year corporation’s report is due May 15 of the following year.
Who Has to File
Any corporation exercising certain privileges in Pennsylvania owes the corporate net income tax and must file the RCT-101. Under 72 P.S. ยง 7402, those privileges include doing business in the state, carrying on activities beyond federally protected solicitation, owning property in Pennsylvania, or having capital employed here.2Pennsylvania General Assembly. Pennsylvania Code 72 P.S. 7402 – Imposition of Tax The requirement reaches domestic corporations organized in Pennsylvania, foreign corporations registered or operating here, and entities treated as corporations for federal income tax purposes, including certain LLCs and business trusts.3Pennsylvania General Assembly. Pennsylvania Code 72 P.S. 7401 – Definitions
You can owe the tax without ever setting foot in Pennsylvania. The statute creates a rebuttable presumption of substantial nexus for any corporation with $500,000 or more in sales sourced to Pennsylvania in the current tax year, regardless of physical presence.2Pennsylvania General Assembly. Pennsylvania Code 72 P.S. 7402 – Imposition of Tax Licensing intangible property used in the state, regularly transacting with Pennsylvania customers in intangibles, and making loans to unaffiliated Pennsylvania entities can each trigger the filing requirement on their own.
Documents to Pull Together First
You cannot complete the RCT-101 without a finished federal Form 1120 (or the applicable 1120 variant). Pennsylvania requires a complete copy of the federal return, prepared on a separate-company basis with all supporting schedules, to be attached to the RCT-101.4Pennsylvania Department of Revenue. 2024 PA Corporate Net Income Tax CT-1 Instructions REV-1200 If your corporation files a federal consolidated return, you will have to break out the schedules on a separate-company basis, including a schedule of taxes expensed.
Depending on your situation, assemble the Pennsylvania-specific schedules you will need:
- RCT-103, net operating loss schedule, if you are carrying forward a prior-year loss.
- REV-934, schedule of nonbusiness income, to separate income allocated directly to a specific state rather than apportioned.
- REV-798 (Schedule C-2), dividend deduction schedule.
- REV-1834 (Schedules C-8 and C-9), adjustments for bonus depreciation differences between federal and Pennsylvania treatment.
- REV-860 (Schedule C-5, OA, and OD), for certain adjustments to income.
- REV-802, if you are adding back intangible expenses or related-party interest.
- REV-803 (Schedule C-7), to claim a credit for tax paid by affiliated entities.
The RCT-106 is a special apportionment form used only by railroad, trucking, bus, airline, pipeline, natural gas, water transportation, and satellite television companies.5Pennsylvania Department of Revenue. RCT-106 Special Apportionment Most corporations never touch it.
Working Through the Form
The header asks for your corporation’s name, address, federal Employer Identification Number, and Pennsylvania Revenue ID. The Revenue ID is a unique 10-digit number the Department of Revenue assigns to each business taxpayer; it is separate from your federal EIN and can be found in your myPATH account or on prior Department correspondence.6Pennsylvania Department of Revenue. What ID Should I Use
Start From Federal Taxable Income
Enter federal taxable income from your separate-company federal return, then apply Pennsylvania adjustments. Common add-backs include state income taxes deducted on the federal return and bonus depreciation differences. Subtractions include income Pennsylvania does not tax, such as certain dividends reported on Schedule C-2. If you have nonbusiness income, such as gains from selling property unrelated to your regular operations, separate it on REV-934 and allocate it directly instead of running it through apportionment.
Apportion With the Single Sales Factor
Pennsylvania uses a single sales factor to apportion multistate income. One hundred percent of the apportionment weight sits on sales sourced to Pennsylvania, with no weight on property or payroll located here.7Pennsylvania Department of Revenue. 2025 PA Corporate Net Income Tax CT-1 Instructions REV-1200 Service revenue is sourced using market-based rules, so sales land where the customer receives the benefit, not where your employees perform the work. Divide Pennsylvania sales by total sales everywhere, then multiply the resulting percentage by your adjusted income to get Pennsylvania-apportioned income.
Apply the Net Operating Loss Deduction
If you have carried-forward losses from prior years, you can deduct them, but Pennsylvania caps the NOL deduction at 40 percent of taxable income after apportionment. Losses generated in tax periods beginning after December 31, 1997, may be carried forward for 20 periods, and a short tax year counts as one full period.8Pennsylvania Department of Revenue. Instructions for RCT-103 Net Operating Loss Schedule Compute the deduction on RCT-103 and carry it to the appropriate line on the RCT-101.
Apply the Rate and Any Credits
Multiply Pennsylvania taxable income by the applicable rate. For tax years beginning in 2026, that rate is 7.49 percent, and it continues to drop each year under the legislated schedule:9Pennsylvania Department of Revenue. Corporation Tax Rates
- 2027: 6.99%
- 2028: 6.49%
- 2029: 5.99%
- 2030: 5.49%
- 2031 and after: 4.99%
Reduce the gross tax with eligible credits. A corporation operating in a designated Keystone Opportunity Zone claims the KOZ credit using the RCT-101 KOZ schedule along with the approved letter from the Department of Community and Economic Development. The credit for tax paid by affiliated entities goes on REV-803, Schedule C-7. Restricted tax credits from various special programs, some of which can be purchased or assigned from other taxpayers, are reported in Section D of the RCT-101.7Pennsylvania Department of Revenue. 2025 PA Corporate Net Income Tax CT-1 Instructions REV-1200
When the Report Is Due
The RCT-101 is due on the 15th day of the month after your federal return’s due date.10Pennsylvania General Assembly. Pennsylvania Code 72 P.S. 7403 – Reports by Corporations For a calendar-year corporation whose federal Form 1120 is due April 15, the Pennsylvania report is due May 15. If that date lands on a weekend or state holiday, the deadline moves to the next business day. Fiscal-year filers apply the same logic: identify the federal due date, then look to the 15th of the following month.
Pennsylvania grants an automatic extension when you have a valid federal extension (Form 7004) on file. Include the Form 7004 with the completed RCT-101 package when you eventually submit it.4Pennsylvania Department of Revenue. 2024 PA Corporate Net Income Tax CT-1 Instructions REV-1200 An extension to file is not an extension to pay. Remit your estimated liability by the original due date to avoid interest and penalties, and remember that any payment of $1,000 or more must be made electronically.
How to Submit and Pay
The Department of Revenue expects most corporations to file the RCT-101 electronically through myPATH at mypath.pa.gov. The portal handles the return, estimated payments, extension payments, and balance-due payments in one place. If you haven’t registered, you will need your Revenue ID or federal EIN to create an account.
Electronic Payment Threshold
Any payment of $1,000 or more must be made electronically, through ACH debit in myPATH or another approved method. Smaller payments may be submitted electronically on a voluntary basis or by check. If you owe $1,000 or more and pay by paper check anyway, the Department assesses a penalty of 3 percent of the payment amount, up to a $500 maximum.11Pennsylvania Department of Revenue. EFT Payment Requirement
Paper Filing Address
If you file on paper, mail the completed RCT-101 with all supporting schedules and a copy of your federal return to:
PA Department of Revenue
PO Box 280427
Harrisburg, PA 17128-042712Pennsylvania Department of Revenue. Mailing Addresses for Department of Revenue Forms and Payments
If you owe a balance, include the CT-V payment voucher with your check so the payment lands on the correct account and period. Assemble the package in the order specified by the CT-1 instructions: RCT-101 pages 1 through 4 first, then RCT-103 if applicable, then federal Form 7004 if applicable, then all Pennsylvania schedules in the order the instructions list, followed by your complete federal return.
Estimated Payments During the Year
Corporations expecting to owe Pennsylvania corporate net income tax should make quarterly estimated payments during the tax year, each installment equal to 25 percent of expected annual liability. Payments go through myPATH, and the $1,000 electronic payment threshold applies to each installment. Underpayment interest applies if quarterly amounts fall short.
If your business income swings significantly from quarter to quarter, you may want to annualize income for each installment rather than dividing last year’s liability by four. The flat 25-percent approach is simpler and what most filers use.
What Late Filing Costs
Missing the filing deadline triggers a flat penalty of $500, plus an additional 1 percent of every dollar of tax due above $25,000.13Pennsylvania Department of Revenue. What Is the Penalty for the Late Filing of Corporate Taxes Due April 15 That 1-percent surcharge adds up quickly for larger liabilities, so even when you need an extension to finish the return, paying your estimated tax on time is the step that saves the most money.
Interest accrues on any unpaid balance from the original due date until the tax is paid in full. The Department of Revenue sets the interest rate periodically, so check the current rate on the Department’s website or in the CT-1 instruction booklet for your tax year. Late payment penalties are separate from and in addition to interest charges.