Starting a Business in New York: The Complete Setup Checklist

Starting a business in New York is exciting, but the paperwork can feel overwhelming. Between the state, the IRS, the Department of Taxation and Finance, and local rules, there are a lot of boxes to check before you can legally open your doors. Miss one and you can face penalties, a frozen bank account, or a tax bill you never saw coming.

This checklist walks you through it in order. It applies to most new businesses on Long Island, in New York City, and across the state. Use it as a roadmap, and lean on a CPA for the parts where the numbers matter.

1. Choose Your Business Entity

Your entity choice affects how you are taxed, how much paperwork you file, and how protected your personal assets are. The most common options for a new New York business are:

• Sole proprietorship. The simplest setup, but it offers no liability protection. Your business and personal finances are legally the same.
• LLC (Limited Liability Company). Separates your personal assets from business debts and stays flexible on taxes. A popular choice for small businesses and single owners.
• Corporation. A more formal structure with shareholders, directors, and stricter recordkeeping. Often chosen by businesses that plan to raise outside investment.

An S-Corp is not a separate entity. It is a federal tax election (Form 2553) that an LLC or corporation can make to reduce self-employment tax once profits are high enough. If your business will earn well into six figures, this is worth modeling early. For more on that trade-off, our team can run the numbers, and our new business formation service covers entity selection in detail.

2. Register With New York State

Once you have chosen an entity, you register it with the state. LLCs and corporations file formation documents (Articles of Organization for an LLC, a Certificate of Incorporation for a corporation) with the New York Department of State. A sole proprietorship using a name other than your own files a DBA at the county level instead.

New York has one requirement that surprises many new owners: the LLC publication requirement. Within 120 days of forming an LLC, you must publish a notice of formation in two newspapers (one daily, one weekly) designated by the county clerk where your LLC is located, for six consecutive weeks. You then file a Certificate of Publication with the Department of State. In high-cost counties like those in New York City, this can run well over a thousand dollars, so budget for it.

3. Get Your Federal EIN

An Employer Identification Number (EIN) is your business's federal tax ID. You will need it to open a business bank account, hire employees, register for state taxes, and file your returns. You can apply directly through the IRS website at no cost, and in most cases the number is issued immediately.

Even single-member LLCs with no employees should get an EIN. It lets you keep your Social Security number off business paperwork and keeps your personal and business identities cleanly separated.

4. Register for New York Sales Tax

If you sell taxable goods or certain services in New York, you must register for sales tax with the Department of Taxation and Finance before you make your first sale. The state issues you a Certificate of Authority, which legally allows you to collect sales tax from customers. You are required to display it at your place of business.

Once registered, you collect tax at the combined state and local rate for where the sale occurs (rates differ by county and city), and you file sales tax returns on the schedule the state assigns you. Operating without a Certificate of Authority when you need one carries real penalties, so do not skip this step if you sell taxable products.

5. Set Up Payroll and Workers' Compensation

The moment you plan to hire even one employee, several requirements kick in. You will need to:

1. Register as an employer with the New York Department of Labor for unemployment insurance.
2. Set up federal and New York State payroll tax withholding and a system to deposit and report those taxes on time.
3. Carry workers' compensation insurance, which New York requires for nearly all employers, often from the first employee.
4. Carry disability and Paid Family Leave coverage, which New York also mandates for most employers.

Payroll mistakes are some of the most expensive errors a new business can make, because the penalties stack quickly and the agencies involved do not wait. This is an area where outsourcing to a professional pays for itself. Our payroll and accounting services handle setup, filings, and compliance so you can focus on running the business.

6. Open Business Banking and Start Bookkeeping

Open a dedicated business checking account as soon as you have your EIN and formation documents. Never run business income and expenses through a personal account. Commingling funds weakens the liability protection your LLC or corporation provides, and it turns tax time into a nightmare of untangling which transactions were which.

Set up bookkeeping from day one, not at year-end. Clean books give you accurate numbers for decisions, make tax filing painless, and keep you ready if you ever apply for financing or face an audit. Starting clean is far easier than reconstructing a year of records in March.

7. Plan for Estimated Taxes

As a business owner, taxes are no longer withheld from a paycheck for you. Instead, you generally pay quarterly estimated taxes to both the IRS and New York State to cover your income tax and self-employment tax as you earn. The federal due dates typically fall in April, June, September, and January.

Underpaying during the year can trigger penalties even if you pay in full by the filing deadline. A CPA can estimate your liability based on your projected profit and set up a payment schedule, so you are setting money aside as you go instead of facing a large, unexpected bill.

This article is for informational purposes only and does not constitute tax or legal advice. Requirements change and every situation is different. Consult a qualified CPA or attorney before forming your business or filing with any agency.