Pennsylvania Corporate Tax Calculator (C-Corp State Tax)

A corporation weighing a Mid-Atlantic headquarters will find Pennsylvania's flat 7.49% corporate income tax rate sitting just below Connecticut's and New Hampshire's matching 7.50% figures, near-identical numbers that place all three states in the upper third of the national range.

Pennsylvania applies the 7.49% rate uniformly to all apportioned C-corporation income, with no bracket thresholds, so the marginal and effective rates are identical at every income level. Compared with neighboring Maryland's 8.25% and Delaware's 8.70%, Pennsylvania's 7.49% is the lowest of the three, though still well above lower-rate states like Indiana's 4.90% or Missouri's 4.00%.

Pennsylvania's 7.49% rate turns the calculator's $500,000 example into $37,450.00 of state tax, just $50.00 less than what Connecticut or New Hampshire would generate on the identical income at their matching 7.50% rate, a difference driven entirely by that single basis point of rate.

Pennsylvania is cutting the highest flat corporate rate in the country down to one of the lowest, on a fixed statutory glide path. The 2026 rate of 7.49% is a waypoint on that schedule, not a stable number, and it is falling by a set increment each year until the phase-down completes. Any Pennsylvania projection past the current year must step the rate down rather than hold it.

1. Read the income field as the taxable base. The single income input is taken as Pennsylvania taxable corporate income exactly as typed. The code applies no modification, allocation or deduction to it before the rate stage; it is the base.
2. Apply the single statutory rate. Pennsylvania's 7.49% rate is multiplied against that figure with no bracket lookup, because the schedule has one band running from the first dollar: $500,000 x 7.49% = $37,450.00.
3. Subtract credits and floor the result at zero. The credits field is subtracted from the step-2 figure and the difference is clamped at $0.00, so no credit entry can drive the liability negative. With the field at its $0 default the $37,450.00 stands; enter $15,000 of credits and the page returns $22,450.00, a reduction of exactly the credit entered because the subtraction is a straight one.
4. Derive the reported rates from those two numbers. The effective rate is the tax divided by the income entered, 7.49% here, and the top statutory bracket is reported separately as 7.49%. Net after-tax retained profit is the income less the tax, $462,550.00. Those four outputs are the whole of what the engine produces.

Using this calculator's baseline scenario: a corporation with $500,000 in taxable income apportioned to Pennsylvania.

1. Start with apportioned taxable income. The corporation has already apportioned $500,000 of its total taxable income to Pennsylvania using the state's statutory apportionment formula, before any state-level tax is applied.
2. Apply Pennsylvania's flat statutory rate. Pennsylvania taxes all C-corporation income at a single flat rate of 7.49%, regardless of income size, so no bracket lookup is required: $500,000 × 7.49% = $37,450.00.
3. Pennsylvania corporate tax due: $37,450.00.
4. Net retained profit. Subtracting the state tax liability from taxable income leaves $500,000 − $37,450.00 = $462,550.00 in after-tax profit retained by the corporation, before any separate federal tax liability is applied.

Because Pennsylvania uses a single flat rate rather than graduated brackets, the 7.49% effective rate is identical to the marginal rate at every income level: a corporation earning $50,000 and one earning $50 million both face the same 7.49% state rate on their apportioned income.

Pennsylvania's corporate net income tax is stepping down under Act 53 of 2022 from 9.99% toward 4.99%, and 7.49% is the 2026 figure. The rate is flat, so the twelve-row schedule rises in identical steps of $83,333.33 of income and $6,241.67 of tax.

The marginal cost of the next unit. Raising apportioned income from $500,000 to $510,000 moves the tax from $37,450.00 to $38,199.00. Every additional $1,000 of Pennsylvania income costs exactly $74.90, at every income level. At $5,000,000 the engine returns $374,500.00, ten times the baseline exactly.

Right method against wrong method, and this is the expensive one. Pennsylvania's rate was 9.99% as recently as tax year 2022, and a great deal of published material still carries it. Applying 9.99% to the $500,000 baseline gives $49,950.00 against the correct $37,450.00, overstating the liability by $12,500.00 on a mid-sized filer and by $125,000.00 at $5,000,000 of income. Running the opposite way, a filer who has already read that the rate is heading to 4.99% and budgets on that basis arrives at $24,950.00 and understates the 2026 bill by $12,500.00.

The reverse question: how much income sits behind a given bill? Divide by 0.0749. A $37,450.00 bill corresponds to $500,000 of apportioned income; a $100,000.00 bill to $1,335,113.48. There is no bracket and no minimum tax in this computation to bend the line.

Where the credit field stops. The engine subtracts entered credits from the computed tax and floors the result at zero. Against the baseline, $37,449 of credits leaves $1.00, $37,450 leaves $0.00, and $50,000 also leaves $0.00 with $12,550 of credit dropped. Pennsylvania's own credits, including the Research and Development credit, are transferable and carry forward under state law; neither behaviour is modelled here and no output reports the unused amount.

What is not computed. Pennsylvania's net operating loss deduction is capped as a percentage of taxable income under 72 P.S. 7401, and this calculator applies no NOL at all. No apportionment is performed either: Pennsylvania uses a single sales factor with market-based sourcing, and the resulting figure is what you are expected to type in. Each $1,000 of over-entry costs $74.90 in the displayed answer.

• Federal Taxable Income Starting Point. Net corporate earnings are determined under IRC § 63 before Pennsylvania modifications. This calculator starts one step later: the income box is read as the finished Pennsylvania taxable figure and nothing is derived from a federal return.
• Pennsylvania Additions & Subtractions. The Pennsylvania tax deducted federally is added back, and the state applies its own bonus depreciation position and related-party addbacks. No addback and no subtraction is computed anywhere in this page's code path, so enter an income figure that already reflects them.
• Apportionment Factor Allocation. Pennsylvania apportions on a single sales factor with market-based sourcing for services and, in recent years, for intangibles. The engine performs no apportionment of any kind. The word does not appear in the primitive this page binds to; the figure you type is taken as the Pennsylvania figure and multiplied by the rate as it stands.
• Net Operating Loss (NOL) Deductions. Allowable Pennsylvania NOL carryforwards reduce the base, subject to the state's percentage cap on how much income a carryforward may offset in one year. No loss deduction is applied by this calculator. If a carryforward is available, subtract it yourself before entering the income.
• Federal corporate income tax (21% under IRC § 11).
• Specialized gross receipts taxes (e.g. Ohio CAT, Washington B&O, Texas Franchise Tax) where applicable.
• Minimum entity franchise tax fees or annual report filing charges.
• Base Erosion and Anti-Abuse Tax (BEAT) or Global Intangible Low-Taxed Income (GILTI) provisions.
• Local municipal corporate earnings taxes (e.g. NYC General Corporation Tax).

• Rounding 7.49% to 7.50%: Treating Pennsylvania's rate as identical to Connecticut's or New Hampshire's rather than the single basis point lower, a small but real difference on a large taxable base.
• Improper Apportionment Sourcing: Applying market-based sourcing vs cost-of-performance rules incorrectly for service revenue apportioned to Pennsylvania.
• Ignoring Unitary Group Combined Reporting: Failing to account for Pennsylvania's mandatory combined return requirements across related entities.
• Neglecting State NOL Carryforward Caps: Overlooking Pennsylvania's annual percentage limitations on net operating loss deductions, which matter more once the 7.49% rate is applied to a larger taxable base.

• Pennsylvania Department of Revenue: Corporate Tax Statutes and Guidance (2026). revenue.pa.gov
• Multistate Tax Commission (MTC): Uniform Apportionment and Allocation Guidelines. mtc.gov