Quick answer
A NY certificate of authority is the sales tax registration the New York State Department of Taxation and Finance requires before you start making sales in New York State that are subject to sales tax, and the state makes no charge for it. You apply through New York Business Express at least 20 days before you begin business, and that includes marketplace sellers and anyone selling at a craft fair, even once a year. Law checked on 3 Oct 2026 on the department's site, tax.ny.gov (Register as a sales tax vendor); cities and counties can add their own rules, and this page is general information, not legal or tax advice.
Nation, an AI store builder, publishes this page. It is pre-launch, with a waitlist on withnation.ai, and no product is ranked or compared here. See where Nation fits.
What the New York Certificate of Authority is
The New York sales tax registration is the Certificate of Authority, issued by the New York State Department of Taxation and Finance (the Tax Department). The department does not call it a seller's permit, but if you are searching for a New York seller's permit or New York sales tax registration, this is the registration you need.
The department says the certificate gives you the right to collect tax on your taxable sales and to issue and accept most New York State sales tax exemption certificates. You need it before making sales in New York State that are subject to sales tax, and You cannot legally make any taxable sales until you have received your Certificate of Authority. The table sets out the main rules, law checked on 3 Oct 2026.
Who needs a Certificate of Authority in New York
The test is what you sell. The Tax Department says How often you sell or how much you charge for goods and services does not usually determine whether you need to register. It gives an example: if you sell taxable items at a craft fair only once a year, you are required to register.
For a seller based in New York, the usual trigger is that you maintain a place of business in the state, such as a store, office, or warehouse. Selling from home counts the same way: the duty to register covers the sale of items through an online auction or other websites. The department lists craft items it treats as taxable, such as knitted and crocheted items, homemade soaps and candles, holiday decorations, woodworking projects, and homemade candy.
These cases come up most often for small sellers:
- Home businesses with no taxable sales: the department lists selling baked goods (pies, wedding cakes, homemade jams and jellies) among home businesses that do not make taxable sales.
- One-off sales from home: people with no intention of making sales on a regular basis as a business do not have to register. The sales must be made from home, and the purchaser must pick up the item at your home.
- Sellers outside New York: register if, in the immediately preceding four sales tax quarters, your gross receipts from goods delivered into New York exceeded $500,000 and you made more than 100 sales.
Other registrations are separate. The department notes that many businesses need permits and licenses from other state and local agencies, such as a liquor license or an environmental permit, so check with your city or county as well.
New York sales tax registration for marketplace sellers
New York treats an online marketplace as a marketplace provider when it, among other things, does provide the forum in which a sale takes place and collects the buyer's payment. A marketplace provider located in New York is register for sales tax and collect tax on taxable sales of tangible personal property that you facilitate for marketplace sellers.
That does not take the seller out of the system. The Tax Department says a marketplace seller who meets any of the registration tests register and file periodic sales tax returns even if a marketplace provider will remit the sales tax due. In practice, a maker in New York who sells only through a marketplace still needs a Certificate of Authority and still files returns, even when the marketplace collects the tax on those orders.
Direct sales are the seller's own job. Orders from your own website, a market stall or a shop are not covered by the marketplace, so you collect the tax on them and report them on your return.
Craft fairs, flea markets and other shows
Fair and show sellers follow a stricter rule than other short-term sellers. If you sell at a craft show, antique show, flea market, or sporting event, you need a regular Certificate of Authority, even if your sales are only on an isolated or occasional basis. Show and entertainment vendors may not apply for a temporary Certificate of Authority.
Show organisers check this. Under the department's guide to sales tax, a show promoter unless that person is registered as a vendor, and must make sure that each vendor who is making sales of products or services at the show clearly displays a valid Certificate of Authority.
If you have no permanent shop, you can attach the certificate to your truck, cart, wagon, stand, or other vehicle or facility you sell from. A $50 penalty can apply if it is not on display.
What a NY certificate of authority costs
The certificate itself costs nothing. The Tax Department's regulation says there shall be no charge to an applicant for a certificate of authority. The costs to plan for are the tax you collect and the penalties for missing rules.
The state sales tax rate is 4%, and local rates set by cities, counties and school districts are added on top, so the combined rate depends on where the order is delivered. You collect that tax from the buyer and send it to the state with your return.
Selling without a certificate is expensive. The penalty is up to $500 for the first day you sell without a valid certificate, plus up to $200 per day for each day after, up to a maximum of $10,000.
How to apply for a New York Certificate of Authority
The application is the same for regular and temporary certificates, and you file it online through New York Business Express.
Pick the right type
New York issues regular and temporary certificates. A temporary one is only for sellers who expect to sell for no more than two consecutive sales tax quarters in any 12-month period. The quarters are March 1 through May 31, June 1 through August 31, September 1 through November 30, and December 1 through February 28. Fair, flea market and show sellers need a regular one.
Create a business login
You need a NY.gov Business account to reach New York Business Express. A personal NY.gov account is not enough.
Apply early
Submit the application at least 20 days before you begin business. Include every location, because You must have a Certificate of Authority for each business location.
Wait for the certificate
The department reviews the application. In its words: "if approved, we'll mail your Certificate of Authority to you." You cannot legally make any taxable sales until you have received your Certificate of Authority.
Display it
Put the certificate where buyers can see it at each place you sell. A $50 penalty can apply if it is not displayed.
Temporary certificate rules
A temporary Certificate of Authority fits a short seasonal business, such as a holiday shop that does not sell at fairs. You can apply only if you expect to sell for no more than two consecutive sales tax quarters in any 12-month period, and the certificate carries a start and end date.
There are limits. You may not apply for more than one temporary Certificate of Authority for any 12-month period. Show and entertainment vendors may not apply for a temporary Certificate of Authority, so a market stall seller cannot use one. The department notes that a regular certificate can still be the better choice, because you do not have to reapply each time you start selling again.
After you get the certificate
Once registered, you are treated as in business for sales tax even before your first sale, so file your sales tax returns on time, even if you have no taxable sales. In general, new vendors must file quarterly returns, due June 20, September 20, December 20, and March 20. Your application asks for the date you plan to start, and your first return covers the sales tax quarter that includes that date. You must file this return even if you do not start your business as originally planned.
The certificate belongs to one owner and one legal form. A Certificate of Authority cannot be transferred or assigned, so a buyer of an existing business needs a new one, and you also need a new one when you are changing the organizational structure (legal form) of your business.
Keep records of every sale and purchase for a minimum of three years. You must make the records available to the Tax Department upon request.
Where Nation fits
Nation
Category: an AI store builder
Nation says one description of what you make builds the store, then agents handle orders, customers and delivery and run ads, content and social posts, with you approving the work. This guide is about a New York tax registration, and Nation is not part of it.
Limits today
- Status: pre-launch, with a waitlist on withnation.ai.
- Pricing and fees: not announced yet.
- Shopper marketplace: no shopper marketplace has been announced.
- Track record: no independent reviews or public stores yet.
Nation publishes this page. The rules come from New York Tax Department pages, and no product is ranked or compared here.
Describe what you makeQuestions about the NY certificate of authority
How much does a NY certificate of authority cost?
A NY certificate of authority is free: the Tax Department's regulation says there shall be no charge to an applicant. The real costs are the sales tax you collect for the state and the penalties for selling without one, which can reach $10,000.
Is a New York seller's permit the same as a Certificate of Authority?
A New York seller's permit and a Certificate of Authority are the same thing in practice. The New York State Department of Taxation and Finance calls its sales tax registration a Certificate of Authority, and you apply for it online through New York Business Express with a NY.gov Business account.
Do I need New York sales tax registration to sell on a marketplace?
New York sales tax registration still applies to marketplace sellers. The Tax Department says a marketplace seller who meets the registration tests register and file periodic sales tax returns even if a marketplace provider will remit the sales tax due. The marketplace collects tax on the orders it handles, and you still file your returns.
Do I need a Certificate of Authority to sell at a craft fair in New York?
A Certificate of Authority is required to sell taxable items at a New York craft fair, even once a year. The Tax Department says sellers at a craft show, antique show, flea market, or sporting event need a regular certificate, and Show and entertainment vendors may not apply for a temporary Certificate of Authority.
How long does it take to get a New York Certificate of Authority?
A New York Certificate of Authority should be applied for at least 20 days before you begin business, because the department reviews the application and mails the certificate. You cannot legally make any taxable sales until you have received your Certificate of Authority, so apply well before your first market or launch.