Your First Year as an S-Corp in New Jersey: The Complete 2026 Compliance Checklist

Short answer: A first-year S-Corp in New Jersey carries three layers of compliance. You file a federal S-Corp return, you run payroll, and you file New Jersey returns on top. The owner must take a reasonable W-2 salary before any distributions. This guide maps every form and deadline for 2026. For the full chain handled as one engagement, work with an NJ S-Corp CPA. To model the tax math first, run our free S-Corp savings calculator.

Electing S-Corp status is one decision. Running an S-Corp is a calendar. Many owners make the election, feel relief, then realize a stack of new filings just started. The list below is that stack, in order, with each form and its 2026 due date.

What the S-Corp Election Commits You To

The election changes how the IRS taxes your profit. It does not remove your business filings. It adds new ones.

Three things start the moment the election takes effect:

• A separate federal return. The business files Form 1120-S each year. Profit and loss pass through to your personal return on a Schedule K-1.
• Payroll for the owner. An owner who works in the business is an employee. You take a W-2 salary before distributions.
• New Jersey returns. New Jersey taxes the S-Corp through the CBT-100S. Payroll adds two NJ filings each quarter.

Most owners elect S status to cut self-employment tax. That benefit is real for profitable businesses. The trade-off is the compliance calendar below. For the structure decision itself, see our guide on S-Corp vs LLC for NJ business taxes.

Your First-Year S-Corp Compliance Calendar

Here is the full first-year sequence for a calendar-year S-Corp. Dates below use 2026 as the example year. Confirm each one against the primary sources linked at the end.

Step 1: Lock in the election with Form 2553

The election is what makes you an S-Corp. Miss it and you stay taxed as before.

• Form: IRS Form 2553, Election by a Small Business Corporation.
• Deadline: No more than 2 months and 15 days after the start of the tax year. For calendar-year owners, that is mid-March.
• Also allowed: You can file any time during the prior tax year.
• Missed it? Late relief is often available under Rev. Proc. 2013-30. The window runs 3 years and 75 days from the intended start date.

New Jersey no longer needs a separate state election. For tax years beginning on or after December 22, 2022, New Jersey follows your federal S election automatically. You still register the corporation with the state and confirm shareholder consent.

Still running a default LLC while you decide? Our first-year LLC compliance checklist for NJ maps the calendar you are on now.

Step 2: Put the owner on payroll

S status only works if the owner draws a real salary. This is not optional.

• Set up: Payroll through a provider such as Gusto, ADP, or QuickBooks Payroll.
• Run: A W-2 wage for the owner, with federal and NJ withholding.
• Why it matters: Skipping payroll puts the whole election at risk. The salary section below covers how much.

Each quarter: federal and NJ payroll returns

Once payroll runs, three returns repeat every quarter. One is federal. Two are New Jersey.

• Form 941 (federal): Reports wages and withheld payroll tax. Due April 30, July 31, October 31, and January 31.
• NJ-927 (New Jersey): Reports NJ wage and withholding tax. Due April 30, July 30, October 30, and January 30.
• WR-30 (New Jersey): Reports wages for each employee. Due on the same NJ schedule of April 30, July 30, October 30, and January 30.

Note the split. The federal quarterly date is the 31st. The New Jersey date is the 30th. It is an easy detail to miss.

Year-end in January: wage forms and FUTA

January is the heaviest month. Several annual filings land at once.

• Forms W-2 to employees: Due January 31.
• Forms W-2 and W-3 to the SSA: Due January 31.
• Form 940 (FUTA): The annual federal unemployment return. Due January 31.

Filing season in March: the S-Corp returns

The entity returns close out the first year.

• Form 1120-S (federal): Due the 15th day of the third month after year-end. For calendar-year filers, that is March 15. When March 15 is a weekend, it shifts to the next business day. In 2026 that moved it to March 16.
• Extension: Form 7004 buys six more months. A calendar-year deadline moves to September 15. It extends time to file, not time to pay.
• NJ CBT-100S (New Jersey): The state S-Corp return, filed alongside the federal return. It carries the NJ minimum tax covered below.

Reasonable Compensation: The Number the IRS Watches

Reasonable compensation is the salary rule at the center of every S-Corp. The IRS states it plainly. Distributions to an owner who works in the business must be treated as wages. This applies to the extent the amounts are reasonable pay for services.

The IRS weighs several factors when it tests a salary:

• Training and experience
• Duties and time spent in the business
• What comparable businesses pay for the same work
• Payments to non-owner employees

There is no fixed safe-harbor percentage. A salary set too low invites the IRS to reclassify distributions as wages. That brings back payroll taxes, interest, and penalties. Owners in this situation often document the salary in writing, using duties and market pay data.

For a deeper look at setting the number, see our guide on S-Corp reasonable salary for NJ physicians and dentists. The same factors apply to any field.

What It Costs to Run an S-Corp in NJ

An S-Corp adds real fixed costs. They are worth planning for before the first year.

Two costs are set by New Jersey and the forms themselves:

• NJ CBT minimum tax: New Jersey charges every S-Corp a minimum Corporation Business Tax. It runs from $375 to $1,500 per year, tiered by NJ gross receipts.
• S-Corp return preparation: ProAxis prepares Form 1120-S, with shareholder K-1s, from $1,200.

Then add payroll processing, the quarterly filings, and W-2s. For most NJ owners, the added yearly cost of running an S-Corp lands around $1,500 to $3,000. Actual fees vary by provider and complexity. These figures are not an offer. Scope is set during the engagement-letter process. See our pricing page and our guide to what a CPA costs in NJ in 2026.

One NJ angle can offset these costs. The NJ SALT and BAIT election lets pass-through entities pay tax at the entity level. That can create a federal deduction against the SALT cap. Whether it helps depends on your income and residency.

How ProAxis Handles First-Year S-Corp Compliance

The forms above have to agree with each other. The salary on payroll must match the wages on the 1120-S. The federal and NJ returns must line up. A missed quarterly filing can unravel the election.

ProAxis handles the full chain as one engagement. That covers the election, payroll coordination, the quarterly returns, and both S-Corp returns. Owners in this situation often prefer one firm over a split between a payroll company and a separate preparer.

ProAxis is a preparation-focused firm. We work under IRS Form 8821, which authorizes us to receive your tax information. We do not file Form 2848. We refer full representation matters to qualified counsel. Everything is 100% virtual, serving NJ, NY, and PA from Bergen County.

First-Year S-Corp Compliance: Frequently Asked Questions

When is my first 1120-S due?

Your first Form 1120-S is due the 15th day of the third month after your tax year ends. For a calendar-year S-Corp, that is March 15. When March 15 falls on a weekend, the due date moves to the next business day. In 2026 it shifted to March 16. Form 7004 adds a six-month extension, which moves a calendar-year deadline to September 15. An extension gives you more time to file, not more time to pay.

Do I have to run payroll my first year as an S-Corp?

Yes. An owner who works in the business is an employee of the S-Corp. The IRS requires a reasonable W-2 salary before you take distributions. That means setting up payroll, withholding tax, and filing Form 941 each quarter. Skipping payroll puts the S-Corp election at risk. It can also trigger back payroll taxes and penalties.

What NJ returns does a first-year S-Corp file?

A New Jersey S-Corp files the CBT-100S each year, the state version of the S-Corp return. On payroll, it also files the NJ-927 and the WR-30 every quarter. Those NJ quarterly returns are due April 30, July 30, October 30, and January 30. New Jersey recognizes your federal S election automatically for tax years beginning on or after December 22, 2022.

What is the NJ CBT-100S minimum tax?

New Jersey charges every S-Corp a minimum Corporation Business Tax on the CBT-100S. It is tiered by NJ gross receipts. The tiers run $375 under $100,000 and $562.50 up to $250,000. They rise to $750 up to $500,000, then $1,125 up to $1,000,000. The top tier is $1,500 at $1,000,000 or more. This is a fixed cost of S-Corp status in New Jersey.

What happens if I miss the reasonable-salary requirement?

The IRS can reclassify your distributions as wages if you take little or no salary. That brings back payroll taxes, interest, and penalties. The IRS weighs your duties, hours, skill, and what comparable businesses pay. There is no fixed safe-harbor number. Owners protect the position by paying a defensible salary through payroll and keeping written support. Results vary by facts.

Related ProAxis Resources

• NJ S-Corp CPA — Election, 1120-S, and Reasonable Comp — the full S-Corp lifecycle handled as one engagement
• Free S-Corp Savings Calculator — estimate your self-employment tax savings at your profit level
• S-Corp vs LLC for NJ Business Taxes — decide whether the election fits before you file
• First-Year LLC Compliance Checklist for NJ — the sibling calendar for LLCs that stay on the default classification
• S-Corp Reasonable Salary for NJ Physicians and Dentists — a deeper dive on setting the salary number
• NJ SALT and BAIT Consulting — stack the BAIT election on top of S-Corp status
• What a CPA Costs in NJ in 2026 — market context for the fees above

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Sources (verified 2026-07-16): IRS Instructions for Form 2553, IRS Instructions for Form 1120-S, IRS Employment Tax Due Dates, IRS S-Corporation Compensation, NJ Division of Taxation Corporation Business Tax overview, NJ employer contribution due dates, and NJ S corporation procedural changes (P.L. 2022, c. 133).

This post is general information, not tax advice, and does not create a CPA-client relationship. ProAxis Tax & Accounting Services is a CPA firm based in Hasbrouck Heights, Bergen County, NJ, serving businesses across New Jersey, New York, and Pennsylvania.