IRS Form CT-1

2025 Printable Template

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Form last updated: 03/2024. Please verify this is the current version before use.

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What is a CT-1 used for?

Form CT-1 is used by employers in the railroad industry to report and pay taxes under the Railroad Retirement Tax Act (RRTA). This form helps ensure the proper collection of taxes that fund retirement benefits for railroad employees.

Who needs to fill out a CT-1 form

Employers in the railroad industry subject to the Railroad Retirement Tax Act (RRTA).

How to fill out a CT-1 online?

Follow these steps to complete your CT-1 form online.

Step 1
Step 1
Access Form CT-1 from the IRS website or a PDF editor.
Step 2
Step 2
Enter your employer identification information accurately.
Step 3
Step 3
Input compensation details for employees subject to RRTA.
Step 4
Step 4
Calculate the taxes owed according to RRTA guidelines.
Step 5
Step 5
Review the completed form for accuracy.
Step 6
Step 6
Sign the form as required.
Step 7
Step 7
Submit the form to the IRS by the applicable due date.
IRS Form CT-1 Information

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Frequently Asked Questions

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Form CT-1 is the Employer's Annual Railroad Retirement Tax Return, used to report and pay taxes under the Railroad Retirement Tax Act.

Form CT-1 is generally due by the last day of February following the tax year being reported.

Yes, Form CT-1 can be filed electronically through IRS-approved e-filing options.

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