To get a NYS Certificate of Authority, apply online through New York Business Express at least twenty days before your first taxable sale. There is no fee. You’ll need a federal EIN first, and you cannot legally collect sales tax until the paper certificate arrives at your business address.1Department of Taxation and Finance. Register as a Sales Tax Vendor2Department of Taxation and Finance. How to Register for New York State Sales Tax – Tax Bulletin ST-360
Who Needs a Certificate
If you sell taxable goods or services in New York, you need one. The rule reaches anyone selling tangible personal property, providing taxable services, selling petroleum products, selling cigarettes, or purchasing goods for resale. Selling once a year counts. Selling from home counts. Setting up as a temporary vendor at a craft fair counts. Registration is mandatory before your first sale.1Department of Taxation and Finance. Register as a Sales Tax Vendor
Get Your Federal EIN First
The New York application asks for your Federal Employer Identification Number upfront, so the IRS is the first stop.
The IRS online EIN application is the fastest route. You’ll receive your number immediately. To qualify, your principal place of business must be in the United States, and you need the Social Security number or ITIN of the person who controls the entity. If you’re forming an LLC, corporation, or partnership, the IRS recommends completing state formation paperwork before applying for the EIN.3Internal Revenue Service. Get an Employer Identification Number
If you can’t use the online tool, fax applications typically produce an EIN within four business days. Mailing Form SS-4 takes roughly four weeks.4Internal Revenue Service. Instructions for Form SS-4
Information You’ll Need for the Application
New York collects everything through Form DTF-17, the Application to Register for a Sales Tax Certificate of Authority. Gather this before you start:
- Business legal name, exactly as registered with the New York Department of State
- Federal EIN
- Business physical address
- Entity type (sole proprietorship, LLC, partnership, corporation, or other)
- Social Security numbers and home addresses for all owners, partners, and corporate officers. These individuals carry personal liability for taxes the business collects.
- NAICS code identifying your industry
- The date you plan to begin making taxable sales, which determines your initial filing cycle
You’ll also complete Form DTF-17.1, the Business Contact and Responsible Person Questionnaire, which the Tax Department uses to verify the identities of the people behind the business.1Department of Taxation and Finance. Register as a Sales Tax Vendor
Submit Through New York Business Express
The preferred method is the state’s online registration portal, New York Business Express. Create a NY.gov Business account first. A personal NY.gov account will not work; the system requires a separate business account.1Department of Taxation and Finance. Register as a Sales Tax Vendor
The portal walks you through your business details, responsible person information, and projected sales activity. At the end, print the confirmation page and keep it. The Tax Department sends status emails to the address tied to your NY.gov Business account, so watch that inbox.1Department of Taxation and Finance. Register as a Sales Tax Vendor
To file on paper instead, mail the completed Form DTF-17 and required attachments to:
NYS Tax Department
Sales Tax Registration Unit
W A Harriman Campus
Albany, NY 12227-8600
If you use a private delivery service instead of USPS, the Tax Department’s Publication 55 lists approved carriers and alternate addresses.5New York State Department of Taxation and Finance. Instructions for Form DTF-17 Online filing is faster and creates a digital record.
The Twenty-Day Rule and What Happens Next
New York Tax Law § 1134 requires you to file at least twenty days before you start doing business, open a new location, or begin purchasing inventory for resale.6New York State Senate. New York Tax Law TAX 1134 – Registration That’s a statutory minimum, not a target. Apply as early as you reasonably can.2Department of Taxation and Finance. How to Register for New York State Sales Tax – Tax Bulletin ST-360
After approval, the Tax Department mails the Certificate of Authority to the business address you provided. The department doesn’t publish a guaranteed processing timeline. Here is where new business owners get tripped up: you cannot legally make any taxable sales until the physical certificate arrives. Not when you submit. Not when the confirmation page prints. When the certificate is in your hands.2Department of Taxation and Finance. How to Register for New York State Sales Tax – Tax Bulletin ST-360
Once it arrives, display it prominently at your place of business where the public can see it. Failing to display carries a $50 penalty.2Department of Taxation and Finance. How to Register for New York State Sales Tax – Tax Bulletin ST-360 The certificate is tied to the specific person or entity that applied. It doesn’t transfer if you sell the business, and a new location needs its own application.6New York State Senate. New York Tax Law TAX 1134 – Registration
Out-of-State Sellers
You don’t have to be physically located in New York to need a certificate. Out-of-state sellers must register once they cross both of these thresholds over the four most recent sales tax quarters: $500,000 in gross receipts from sales of tangible personal property delivered in New York, and more than 100 such sales. Both conditions must be met. Once you hit them, you have thirty days to file a certificate of registration.6New York State Senate. New York Tax Law TAX 1134 – Registration
New York also presumes a seller is a vendor if it has affiliate marketing agreements under which New York residents earn commissions for referring customers and those referred sales exceed $10,000 over the prior four sales tax quarters.7Department of Taxation and Finance. Presumption Applicable to Definition of Sales Tax Vendor
Penalties for Operating Without One
Making sales without a valid Certificate of Authority can bring a civil penalty of up to $500 for the first day you operate, plus up to $200 for each additional day, capped at $10,000.8New York Codes, Rules and Regulations. New York Code 20 NYCRR 533.1 – Registration Requirement
Willfully selling taxable goods or services without a certificate is a misdemeanor under New York Tax Law § 1817. If you had a certificate revoked and continue operating without one within five years of that revocation, you face a misdemeanor conviction with a minimum fine of $500 on top of any other penalties.9New York State Senate. New York Tax Law TAX 1817 – Sales and Compensating Use Taxes
There’s also a quiet economic cost. Without registration, you cannot legally collect sales tax from customers, but you’re still liable for the tax on those transactions. You end up paying it out of your own revenue.
What Your Certificate Lets You Do
Once you’re registered, you can buy inventory without paying sales tax on it. Give your supplier a completed Form ST-120, New York’s Resale Certificate, instead of paying tax at the point of purchase. The tax is collected later from your end customer.
Form ST-120 can cover a single transaction or serve as a blanket certificate for ongoing purchases of the same general type from that supplier. Temporary vendors cannot issue blanket certificates. The resale certificate covers tangible personal property for resale, services for resale, and restaurant-type food purchased for resale, but not motor fuel, diesel fuel, or prepaid cigarette tax.10Department of Taxation and Finance. Form ST-120 Resale Certificate
One rule to keep straight: if you buy something tax-free using a resale certificate and then use it yourself, you owe the tax directly to New York. Using a resale certificate for personal purchases or business supplies you won’t resell is a fast path to audit trouble.10Department of Taxation and Finance. Form ST-120 Resale Certificate
Your New Filing Obligation
Registration creates an ongoing duty to file returns, even in periods when you have no taxable sales. Your filing frequency depends on how much you collect:
- Annual filing if your total sales and use tax due is $3,000 or less during the annual filing period, and the Tax Department assigns you to annual filing
- Quarterly filing as the default, as long as taxable receipts stay below $300,000 in a quarter
- Monthly (part-quarterly) filing once your taxable receipts hit $300,000 or more in any quarter, starting with the next sales tax quarter
The Tax Department can reclassify you as your volume changes. If you’re filing monthly and receipts drop below $300,000 for four consecutive quarters, you revert to quarterly.11Department of Taxation and Finance. Filing Requirements for Sales and Use Tax Returns
If your business later changes its name, address, ownership structure, or responsible persons, don’t file a new DTF-17. The Tax Department directs you to the amendment process in Tax Bulletin TB-ST-25.5New York State Department of Taxation and Finance. Instructions for Form DTF-17 If you close the business, formally surrender the certificate. Letting it sit inactive doesn’t end your filing obligations, and missed filings generate penalties even when you owe zero tax.