How to Start an Online Store in New York: Sales Tax and Registration

Running an online store sounds simple until you hit the registration and tax requirements. New York has specific rules about when you owe sales tax, what needs a permit, and how to stay compliant from day one. This guide walks you through the exact steps, the costs, and the state-specific requirements that matter for your business.

What You Need Before You Start

Before you register anything, have these items ready:

• A business structure decision (sole proprietorship, LLC, or corporation)
• An Employer Identification Number (EIN) from the IRS, even if you have no employees
• Your Social Security Number or Tax ID
• The address where your business is located (can be a home address)
• A list of the types of products or services you will sell
• Information about any sales channels you plan to use (your own website, Shopify, Amazon, eBay, etc.)

The EIN is free from the IRS at irs.gov and takes minutes to apply for online. Even if you are a sole proprietor with no employees, getting an EIN keeps your personal and business finances separate and improves credibility with banks and suppliers.

Step 1: Register Your Business with New York

If you are starting as a sole proprietor using your own name, you can often skip formal registration with the state. However, if you want to use a business name that is different from your own name, you must file a Certificate of Assumed Name (also called a DBA or "doing business as") with the New York Department of State.

For an LLC or corporation, you must file formal formation documents:

• LLC: Articles of Organization (Form DOS-1336). Filing fee is $200. You can file online through the New York Business Express system at businessexpress.ny.gov. Filings submitted online are generally reviewed the same business day, with a filing receipt returned by email. You can also pay an extra fee for expedited handling: $25 for 24-hour processing, $75 for same-day processing, or $150 for 2-hour processing.
• Corporation: Certificate of Incorporation (Form DOS-1239). Filing fee is $125, also available through New York Business Express.
• DBA (assumed name): Certificate of Assumed Name. Filing fee is $25 if you are already registered as an LLC or corporation. If you are a sole proprietor or general partnership, you file a business certificate with your county clerk instead, and county fees vary.

You can search existing business names and file online at the New York Department of State website: dos.ny.gov. The online filing system is called New York Business Express, and it is the official state portal for business registration.

Important note for LLCs: New York requires all new LLCs to publish a Notice of Formation in two newspapers once a week for six successive weeks within 120 days of filing. This is not a state fee, but the newspapers charge for publication (costs vary widely by county, from a few hundred dollars upstate to well over $1,000 in Manhattan). You then file a Certificate of Publication with the state for a $50 fee. Many new business owners overlook this requirement, so budget for newspaper costs upfront.

Step 2: Understand New York's Sales Tax Nexus Rule

One of the most important facts to understand is when you actually owe sales tax to New York. Many online sellers mistakenly believe they only owe tax if they have a physical location in the state. That is not true.

New York has an "economic nexus" rule. You must collect and remit New York sales tax if you have BOTH of the following in the immediately preceding four sales tax quarters:

• More than $500,000 in sales from New York customers, AND
• More than 100 transactions from New York customers

Sales through online marketplaces like Amazon, eBay, or Shopify count toward this threshold. If you hit both numbers, you are required to register for a sales tax permit, even if you operate entirely online from outside New York.

If you are below this threshold, you are not required to collect New York sales tax on remote sales. However, requirements change and rates vary, so verify the current rules with the New York Department of Taxation and Finance at tax.ny.gov before launching.

Step 3: Get Your Certificate of Authority (Sales Tax Permit)

Once you cross the economic nexus threshold, or if you have a physical presence in New York (including a home-based business), you need a Certificate of Authority to collect and remit sales tax. This is the official sales tax permit.

Apply online through the New York Department of Taxation and Finance at tax.ny.gov/bus/st/register.htm. The application is free and takes about 10 to 15 minutes. You will need:

• Your EIN or Social Security Number
• Your business address
• A description of what you sell
• Your estimated monthly sales

Once approved, you receive your Certificate of Authority by mail or email, depending on your application method. Apply at least 20 days before your first taxable sale, because you may not make taxable sales until you have your Certificate of Authority.

Step 4: Know What Is Taxable in New York

Not everything you sell is subject to sales tax in New York. The most important exception is clothing.

Clothing items under $110 are exempt from New York state sales tax. However, local sales taxes vary by county and city, so some localities may still charge tax on clothing under $110. Items over $110 are always taxable at both state and local rates.

For example, a $99 shirt is exempt from state tax but may owe local tax depending on location. A $150 jacket owes both state and local tax.

Other non-taxable items include food for human consumption (with exceptions for prepared food and certain snacks), prescription medications, and medical devices. Taxable items include beauty products, supplements, and most general merchandise.

The state website has a full list of taxable and non-taxable items. When you register for your Certificate of Authority, you will specify your product categories so the state can ensure you are applying the correct rates.

Step 5: Set Up Sales Tax Collection in Your Store

If you use a platform like Shopify, WooCommerce, BigCommerce, or Squarespace, configure your sales tax settings before launch.

• Configure your tax rates. Enter the 4% New York state base rate, then add local rates for each county. Many platforms have built-in tax rate databases that update automatically.
• Decide on tax-inclusive vs. tax-exclusive pricing. You can display prices before tax (tax-exclusive) and add tax at checkout, or include tax in the displayed price (tax-inclusive). The method does not change what you owe; it only affects how customers see the price.
• Enable tax calculation by location. Your platform should calculate the correct rate based on the customer's shipping address, not your address.
• Test your calculations. Place a test order from a New York address to verify the tax amount is correct. Test orders from different counties to ensure local rates apply correctly.

If you are below the economic nexus threshold and not required to collect tax yet, you still have the option to register and collect voluntarily. Some sellers do this to build good compliance habits early.

Step 6: File Sales Tax Returns

Once you have a Certificate of Authority, you are required to file sales tax returns on a schedule determined by the state. Most new businesses file quarterly, with returns due March 20, June 20, September 20 and December 20. Monthly filing applies once taxable sales reach $300,000 or more in a quarter.

File online through the New York Department of Taxation and Finance. You can pay by electronic funds withdrawal, credit card, or check. Late filings and payments incur penalties and interest, so mark your calendar and set reminders.

Tips and Common Mistakes to Avoid

Mistake 1: Forgetting that marketplace sales count. If you sell on Amazon FBA or eBay, those sales count toward your $500,000 and 100-transaction threshold. Track all sales channels combined, not separately.

Mistake 2: Not registering once you cross the threshold. Once you exceed both $500,000 in sales and 100 transactions over the preceding four sales tax quarters, you have 30 days to register. Delaying registration creates back taxes and penalties. If you are close to the threshold, register preemptively.

Mistake 3: Applying the wrong tax rate. Many sellers apply their home address tax rate to all customers. Tax rate is based on the customer's shipping address, not your location. If you ship to Brooklyn, use Brooklyn's rate; if you ship to Buffalo, use Buffalo's rate.

Mistake 4: Misunderstanding the clothing exemption. Remember, only clothing under $110 is exempt from state tax. Accessories like belts, hats, and scarves may have different rules. Check the state website for edge cases.

Mistake 5: Not keeping records. Keep copies of all sales tax returns, payment confirmations, and exemption certificates from business customers. The state may audit you, and documentation is your defense.

Tip 1: Consult a CPA or attorney. Sales tax rules are complex and state-specific. A few hundred dollars spent on professional advice early can save you thousands in penalties later. This is especially true if you sell across multiple states or have high volume.

Tip 2: Start collecting tax before you are required. If you are approaching the threshold, start collecting proactively. It is easier to adjust a small refund than to chase back taxes and penalties from months of uncollected sales.

Tip 3: Use tax-calculation software. Services like TaxJar, Avalara, and Vertex integrate with most e-commerce platforms and automatically calculate the correct rate for every order. The cost is usually under $50 per month for small businesses.

Expected Results and Timeline

Once you file your business registration, you can launch your online store immediately. Registration typically takes 1 to 5 business days if you file online through New York Business Express. Apply for your Certificate of Authority at least 20 days before your first taxable sale.

Your first sales tax return will be due 20 days after the end of your first reporting period. If you register in mid-month, your first month may be a partial month. For quarterly filers, returns are due on the 20th day after each sales tax quarter ends.

Compliance takes ongoing attention. Set up a calendar reminder for tax return deadlines, track sales by location, and reconcile your platform's reported sales against your tax filings. The effort upfront prevents headaches later.

Important Disclaimer

This article is informational content only and not legal, tax, or accounting advice. Sales tax rules are complex and change frequently. The facts and thresholds described here are accurate as of the publish date, but you should verify all requirements with the New York Department of Taxation and Finance at tax.ny.gov and the New York Department of State at dos.ny.gov before taking action. Consult a qualified CPA or attorney for advice specific to your situation. Tax compliance is a shared responsibility between you and your professional advisors.

Next Steps

1. Decide on your business structure (sole proprietor, LLC, or corporation)
2. Apply for an EIN from the IRS (free, online, immediate)
3. Register your business name with the New York Department of State if you are using an assumed name
4. If you plan to file an LLC or corporation, file your formation documents and allow 1 to 5 business days for approval
5. As your sales grow, monitor your progress toward the $500,000 and 100-transaction thresholds
6. Once you cross the threshold or have a physical presence in New York, register for your Certificate of Authority immediately
7. Configure sales tax rates in your e-commerce platform
8. Set up a system to track and file your sales tax returns on your assigned schedule (quarterly for most new businesses)
9. Consult a CPA or attorney to ensure ongoing compliance

Starting an online store requires attention to detail, but the steps are straightforward once you understand New York's specific rules. Register correctly from the start, and your business will be built on a solid compliance foundation.