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Corporation Income Tax

The corporation income tax applies to every Maryland corporation and every other corporation that has a nexus with Maryland.

Effective January 1, 2008, the tax is imposed at an 8.25 percent rate on the Maryland taxable income, defined as the Maryland modified income, which is the corporation federal taxable income adjusted by state modifications. Corporations engaged in multistate operations must allocate Maryland modified income using an apportionment formula, generally consisting of receipts, property and payroll factors.

Certain corporations are also subject to new reporting requirements.

Maryland corporations may also be eligible for business tax credits which may be claimed against the corporation income tax by filing Form 500CR.

S corporations, partnerships and limited liability companies should not file a corporation income tax return. These businesses must file as pass-through entities.

 Corporation Income Tax Information
Captive Real Estate Investment Trusts
Nexus Information
Administrative Releases
Choose the Right Corporation Tax Form
Filing the Corporation Tax Return
Due Dates and Extension Information
Computing the Apportionment Factor
Estimated Corporation Taxes
New Reporting Requirements
Pass-Through Entities
Business Tax Credits
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Important Reminders
 Corporation Income Tax Related Forms
Form 500, Corporation Income Tax Return
Form 500CR, Business Tax Credits
Form 500D, Declaration of Estimated Corporation Income Tax
Form 500DM, Decoupling Modification
Form 500E, Application for Extension of Time to File Corporation Income Tax Return
Form 500UP, Underpayment of Estimated Income Tax by Corporations
Form 500X, Amended Corporation Income Tax return



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