New York businesses lose money two ways on sales tax. They overpay on purchases that qualify for exemption, or they fail an audit because an exemption certificate is missing, incomplete, or out of date. A valid certificate removes tax from a qualifying purchase. A defective one shifts the tax bill to the seller on audit, with penalty and interest on top.
This page covers which New York exemption certificates exist, who qualifies, how to apply, the 90-day acceptance rule, retention, and audit risk. Every rule here traces to the New York State Department of Taxation and Finance bulletin TB-ST-240, Exemption Certificates for Sales Tax, updated January 21, 2026.
What Is a New York Sales Tax Exemption Certificate?
A New York sales tax exemption certificate is a form that lets a qualified buyer purchase eligible goods or services without paying New York sales tax. Eligibility rests on the buyer’s status or the purchase’s use. The seller keeps the completed certificate as proof the sale was exempt.
What Information Must the Certificate Include?
A valid certificate must carry the date prepared, the purchaser’s name and address, the seller’s name and address, the purchaser’s Certificate of Authority ID number where the form requires it, the purchaser’s or authorized representative’s signature, and the specific exemption reason, per TB-ST-240. Miss any required field and the certificate is invalid, shifting tax liability to the seller.
Some forms add their own fields, such as a project reference or an Exempt Organization number. Complete every field the specific certificate asks for, not only the shared set above.
What Is the Difference Between an Exemption Certificate and a Resale Certificate?
A resale certificate (Form ST-120) defers tax on goods bought for resale. An exemption certificate (Form ST-119.1 and others) eliminates tax based on the buyer’s exempt status or exempt use. Resale turns on the purpose of the purchase; exemption turns on who the buyer is or how the item is used.
| Certificate | Purpose | Who uses it | Example | Tax treatment |
|---|---|---|---|---|
| Resale Certificate (Form ST-120) | Buy goods for resale without paying sales tax | Wholesalers, retailers, distributors | An electronics wholesaler buys cables to resell to retailers | Tax is collected when the item is sold to the final consumer |
| Exemption Certificate (Form ST-119.1) | Buy goods tax-free based on exempt status | Nonprofits, schools, government agencies | A nonprofit hospital buys medical supplies for patient care | No tax is collected on qualifying purchases |
Do You Need a Certificate of Authority to Use New York Exemption Certificates?
Most business-use certificates require a Certificate of Authority (New York’s sales tax registration); status-based certificates do not. Forms ST-120, ST-120.1, and ST-121 require one. Form ST-125 for farmers requires no registration. Nonprofits need an Exempt Organization Certificate with a six-digit EX number instead, obtained through Form ST-119.2.
| Form | Certificate of Authority required? | Credential needed instead | Source |
|---|---|---|---|
| ST-120 (resale) | Yes | None | Form ST-120 |
| ST-120.1 (contractors) | Yes | None | Form ST-120.1 |
| ST-121 (exempt use) | Yes (most items) | None | Form ST-121 |
| ST-125 (farmers) | No | None | TB-ST-240 |
| ST-119.1 (exempt orgs) | No | Exempt Organization Certificate (EX number) via ST-119.2 | TB-ST-240 |
Register through Commenda’s New York business registration service to obtain a Certificate of Authority before issuing a resale or exempt-use certificate.
Which Exemption Forms Does New York Use?
New York uses a distinct certificate for each exemption type. The table below lists every form, its purpose, who uses it, and whether blanket use is allowed. Each form links to its official tax.ny.gov PDF.
| Form | Purpose | Who uses it | Blanket allowed |
|---|---|---|---|
| ST-120 | Resale Certificate | Registered vendors buying for resale | Yes |
| ST-120.1 | Contractor Exempt Purchase Certificate | Registered contractors on exempt jobs | Per project |
| ST-121 | Exempt Use Certificate (manufacturing and other exempt uses) | Manufacturers, producers | Yes |
| ST-121.1 | Exemption Certificate for Tractors, Trailers, Semitrailers, or Omnibuses | Common carriers | Yes |
| ST-119.1 | Exempt Organization Exempt Purchase Certificate | Nonprofits with an EX number | Yes |
| ST-119.2 | Application for an Exempt Organization Certificate | Orgs applying for exempt status | N/A (application) |
| ST-125 | Farmer’s and Commercial Horse Boarding Operator’s Exemption Certificate | Farms, horse boarding operations | Yes |
| AU-298 | Application for a Direct Payment Permit | Businesses self-assessing use tax | N/A (permit) |
| FT-1004 | Diesel motor fuel purchases for farmers | Farms (diesel) | Farm use |
| FT-420 | Motor fuel refund for farmers | Farms (motor fuel) | N/A (refund) |
| DTF-950 | Diplomatic tax exemption | Foreign diplomats | No (per purchase) |
| DTF-801 | Tribal exemption | Enrolled tribal members and tribal entities | Per purchase |
| Government purchase order | Official government purchases | Federal, state, and local government | N/A |
Federal, New York State, and local government entities buy with a purchase order (or Form ST-122 for authorized agents), never Form ST-119.1.
How Does the New York Resale Certificate (Form ST-120) Work?
Registered vendors with a Certificate of Authority use Form ST-120 to buy inventory tax-free; tax is collected from the end customer at the retail sale. Form ST-120, revised January 2026, limits use to resale only, with no personal or business use. Blanket use is allowed, and both parties keep records.
| Violation | Penalty | Source |
|---|---|---|
| Misusing Form ST-120 | 100% of the tax due, plus $50 per fraudulent certificate, plus possible felony prosecution | Form ST-120 |
| Doing business without a required Certificate of Authority | Up to $500 for the first day and up to $200 for each additional day, capped at $10,000 | Form ST-120 |
How Do Nonprofits Get a New York Sales Tax Exemption?
Nonprofits follow a two-step process. Apply with Form ST-119.2, receive an Exempt Organization Certificate carrying a six-digit EX number, then purchase using Form ST-119.1. The organization must be organized exclusively for exempt purposes and must be the direct purchaser and payer. Federal 501(c)(3) tax-exempt status does not automatically confer the New York exemption.
Reimbursed employee purchases generally fail, since the organization is not the direct payer. The exemption never covers a member’s personal use.
Do Religious and Educational Organizations Follow the Same Process?
Yes. Religious and educational organizations both apply with Form ST-119.2 and purchase with Form ST-119.1. Churches are not automatically exempt and must apply. Educational purchases must serve the educational mission with no private benefit, and public schools may need separate documentation under government exemption rules.
How Does the New York Agricultural Exemption (Form ST-125) Work?
Farms and commercial horse boarding operations use Form ST-125 for items used predominantly, meaning more than 50%, in production or boarding. No registration is required, unlike a resale certificate. Coverage runs across equipment, materials, animals, feed, non-motor fuel, utilities, and repair services. Blanket use is allowed.
Diesel and motor fuel use separate mechanisms: Form FT-1004 for diesel motor fuel and Form FT-420 for a motor fuel refund.
How Do Manufacturers Qualify for Exemption (Form ST-121)?
Manufacturers claim purchases used directly and predominantly in production under Form ST-121, the Exempt Use Certificate: machinery, equipment, parts, tools, supplies, and production utilities. A Certificate of Authority is required to claim most Part 1 exemptions. Form ST-121, last revised January 2011, cannot buy motor fuel or diesel motor fuel exempt except as its instructions describe.
How Does the Common Carrier Vehicle Exemption (Form ST-121.1) Work?
Common carriers buy or lease qualifying tractors, trailers, semitrailers, and omnibuses tax-free with Form ST-121.1. A qualifying tractor-trailer combination exceeds 26,000 pounds gross vehicle weight; a qualifying omnibus weighs at least 26,000 pounds and measures at least 40 feet. Parts, equipment, and services for those vehicles are exempt on the same certificate.
Transportation services themselves are generally not taxed. Separate the nontaxable transportation from any taxable shipping or handling charges on the invoice.
What Is a New York Direct Pay Permit (Form AU-298)?
A direct pay permit lets an eligible registered business buy without paying sales tax at purchase, then self-assess and remit use tax directly to New York. Use tax is what a business owes when it buys taxable goods without paying sales tax and no valid exemption applies. Without a permit, that liability surfaces on audit with penalties.
Apply with Form AU-298. The business must be compliant on its filings, may use the permit only when taxability is uncertain at purchase, and must document its accounting methods. A direct pay permit is not a substitute for exemption certificates.
What Is a Blanket Certificate and When Do You Need a Single-Use Certificate?
A blanket certificate covers all recurring qualifying purchases from one seller; a single-purchase certificate covers exactly one transaction. The buyer marks the blanket or single-purchase box on the form itself, and both Form ST-120 and Form ST-121 support blanket use. Buyers must issue an updated certificate when their details or status change.
Use a single-purchase certificate for a one-off or unusual purchase outside an ongoing relationship, and for forms or situations where blanket use is not permitted.
Do New York Exemption Certificates Expire?
New York sets no fixed statutory expiration, but validity depends on the certificate type. Blanket certificates stay valid indefinitely for recurring purchases while the buyer’s information stays accurate. Single-use certificates cover one transaction and are spent once used. Sellers can request an updated certificate at any time and should review certificates on a regular cycle.
What Is New York’s 90-Day Rule for Accepting Certificates?
A seller must receive a properly completed certificate within 90 days of the sale to be protected in good faith, per TB-ST-240. Received in time, the seller is relieved of the tax liability. Missed, the seller can be assessed the tax on audit. New York accepts paper and electronic certificates under identical rules.
How Long Must Sellers Keep New York Exemption Certificates?
Sellers must keep each certificate at least three years from the due date of the sales tax return on which the last sale using that certificate was reported, or the filing date if later, per TB-ST-240. Store every certificate linked to the exempt sale it supports so it can be produced on audit.
What Happens If Your Exemption Certificates Fail a New York Audit?
The seller becomes liable for the uncollected tax plus interest and penalties when certificates are missing, incomplete, or misused. The rules rest on Tax Law Section 1132(c) and 20 NYCRR Sections 532.4, 532.5, and 533.2, per TB-ST-240. Willfully issuing a false or fraudulent certificate can bring penalties, fines, or a jail sentence.
Common failures include blank required fields, misuse by ineligible buyers, failure to verify a buyer’s status, and poor documentation. A New York retailer that accepts a nonprofit’s certificate after the nonprofit’s exempt status has lapsed owes the unpaid tax and penalties when the audit surfaces it.
How Should Businesses Manage Exemption Certificates?
Collect the certificate at the time of sale, validate every required field, store it digitally in a searchable system, set review reminders, and run periodic internal audits. Automated exemption certificate management software handles collection, validation, storage, and expiry alerts, which cuts the audit exposure that Commenda estimates sinks roughly 9 in 10 businesses on missing or defective B2B certificates.
How Commenda Automates New York Exemption Certificate Management
Manual certificate tracking fails audits. Commenda’s indirect tax platform collects exemption certificates at the point of sale, validates every required field against New York’s rules, stores them audit-ready, and alerts you before reviews are due. It connects through 100+ ERP (enterprise resource planning), API (application programming interface), and custom integrations.
Pair it with Commenda’s New York sales tax guide and New York sales tax rates page, and check where you owe tax with the US sales tax nexus guide. Book a demo to see your New York exemption certificate gaps before an auditor does.
