If you sell taxable products or services in New York State, you're a sales tax vendor, and the state expects you to register, collect the tax and file returns on schedule. The rules aren't hard once you know them, but missed returns add up fast. Here are the basics, plus the next due dates to put on your calendar.
Register before you make your first sale. Anyone selling taxable goods or services in New York must register with the Department of Taxation and Finance and get a Certificate of Authority. That includes people who sell from home, sell at a fair or pop-up, or sell only once a year. Apply online through New York Business Express at least 20 days before you start business. You can't legally make taxable sales until you receive your certificate, and you must display it where you do business. Each location needs its own certificate. Buying an existing business or changing your business structure (for example, from sole proprietor to corporation) means applying for a new one.
Collect tax from your customers. The tax you collect belongs to the state, so keep it separate from your operating cash. New York's state rate is 4%, plus local tax that varies by county and city. In Nassau County, the combined rate is 8.625%, and in Suffolk County it's 8.75%. The rate is based on where the customer takes delivery, so a sale shipped to another county may need a different rate. Use the state's Jurisdiction/Rate Lookup tool if you're unsure.
Know your filing frequency. The state assigns it:
Quarterly: Most new vendors start here.
Annual: The state may move you to annual filing if your tax due is $3,000 or less for the year. The annual return covers March 1 through the end of February.
Monthly (part-quarterly): Required once your taxable sales and purchases reach $300,000 or more in a quarter.
The state notifies you when your frequency changes.
Watch the sales tax quarters. They don't match the calendar quarters. Quarterly returns are due 20 days after each period ends, and the due date moves to the next business day when it falls on a weekend or legal holiday:
March 1–May 31: due June 20
June 1–August 31: due September 20
September 1–November 30: due December 20. In 2026, that's Monday, December 21, because December 20 falls on a Sunday.
December 1–February 28 (29): due March 20. In 2027, that's Monday, March 22, because March 20 falls on a Saturday. Annual returns (March 1, 2026 through February 28, 2027) are due the same day.
File even when you had no sales. Once you're registered, you have to file a return for every period, even if you made no sales or owe nothing. Your first return covers the quarter that includes the start date on your application, even if your opening is delayed.
Use Web File. Most vendors are required to file online, and Sales Tax Web File handles monthly, quarterly, annual and no-tax-due returns. You can pay directly from your bank account when you file and schedule the payment ahead of the due date.
Selling online or from out of state? A business with no physical presence in New York must register if, in the previous four sales tax quarters, it made more than $500,000 in sales of tangible goods delivered into New York and more than 100 such sales. If you sell through an online marketplace that collects New York tax on your behalf, you generally don't collect tax on those sales. If you're registered, though, you still report them as nontaxable sales on your return and keep the marketplace's certificate of collection. Read more on the CPA for E-commerce Sellers page.
Keep your records. Keep sales slips, invoices, receipts, cash register tapes and exemption certificates for at least three years from the return's due date or the date you filed, whichever is later.
Late returns cost money. Late filing and late payment bring penalties and interest. There's a penalty even when you owe no tax, generally $50. Making taxable sales without a Certificate of Authority can bring daily penalties that add up to as much as $10,000.
Ray helps small businesses register, file on time and keep sales tax organized in their books. Learn more about New York sales tax filing or CPA services for retail businesses. Not sure where you stand? Book a free 10-Minute Fit Check, call 516-493-2967, or send a message.
This article is general information, not tax advice. Contact Ray to discuss your situation.
