CBT-100S: S Corporation Business Tax Return Form (2024)
New Jersey · NJ Division of Taxation · Used for tax years 2024
Form CBT-100S is the New Jersey Corporation Business Tax Return for S corporations. It reports taxable net income, tax liability, credits, payments, and any balance due or overpayment, including tax paid on behalf of nonconsenting shareholders. The form and all related forms and
Who files this form
CBT-100S is New Jersey’s S Corporation Business Tax Return. The 2024 version covers tax years ending on or after July 31, 2024, through June 30, 2025.
The form also provides filing requirements for inactive corporations. It does not state the full rules for determining which corporations must file.
What you'll need
- Federal return and attachments: Include copies of the federal return(s), forms, and schedules with the New Jersey return.
- Corporation information: Have the federal employer ID number, New Jersey corporation number, federal S corporation election date, incorporation details, and business information requested on page 1.
- Financial records: Gather income, expense, inventory, tax, and balance sheet information. Schedule A-2 must match the applicable federal Form 1125-A. Schedule F must match the applicable federal Form 1125-E.
- Shareholder information: Schedule K asks for shareholder counts, names, Social Security numbers, income shares, distributions, and other shareholder tax information.
- Partnership payment records, if applicable: Include copies of all NJK-1s for payments made by partnerships on the corporation’s behalf and reported on page 1, line 8b.
- Supporting forms and statements, as applicable: Include the forms and schedules requested for reported items, such as Form 4797, Schedule D (Form 1120-S), and Form 4562. Provide additional statements, called riders, where the questionnaire or schedules require them.
How to file
File electronically. Form CBT-100S and all related forms and schedules must be filed electronically.
The printed forms are for reference only. Do not mail them to the New Jersey Division of Taxation. The form directs filers to the Division’s website for more information.
Include the required federal return copies and supporting attachments. The return includes a signature and verification for a duly authorized corporate officer, plus preparer information if someone else prepares the return.
Common mistakes
- Mailing the reference form: The form explicitly says not to mail it. Electronic filing is required.
- Skipping required schedules: All taxpayers must answer the Annual General Questionnaire and complete Schedule A and Schedule J. All corporations must complete and submit Schedule A-4.
- Entering Schedule J’s allocation factor as a percentage: Carry the fraction to six decimal places. Do not express it as a percent.
- Using inconsistent balance sheet figures: Schedule B figures must match the corporation’s books. If they do not, explain and reconcile the differences on a rider. Consolidated information is not permitted on single returns.
- Leaving out federal attachments: The verification states that copies of federal returns, forms, and schedules must be included.
Questions people ask
What must an inactive corporation complete?
Complete page 1, the Annual General Questionnaire, and Schedules A (Parts I and II), A-2, A-3, and A-4. A corporate officer must sign and certify that the corporation conducted no business, had no income, receipts, or expenses, and owned no assets during the entire return period.
Do the surtax and Corporate Transit Fee apply to New Jersey S corporations?
No. The form states that the surtax enacted under P.L. 2018, c.48 and the Corporate Transit Fee enacted under P.L. 2024, c.20 do not apply to New Jersey S corporations.
What if page 1, line 1 would show a net loss?
Enter zero. Page 1 specifically instructs filers to enter zero if there is a net loss.
Can an overpayment be refunded or carried forward?
The form provides entries for an amount to be refunded and an amount to be credited to the 2025 tax return. It also provides an entry for an amount credited to a combined group for 2024 or 2025, with the group’s unitary ID number.