To get a farm tax exempt number, apply through your state’s department of revenue or equivalent tax agency, submitting proof that you run a commercial agricultural operation along with your federal tax identification. The exemption is a state-level program, not a federal one, so the exact form, documents, and even the terminology differ depending on where you farm. What stays consistent across almost every state is the core evidence they want: that you’re farming as a business, that you have a federal tax ID, and that you’re producing agricultural goods for sale.
If you farm in Alaska, Delaware, Montana, New Hampshire, or Oregon, the question is moot. Those states have no sales tax, so there’s nothing to be exempt from.
Confirm You Qualify Before You Apply
States issue these exemptions to farmers, not hobbyists. The question they’re trying to answer is whether your operation produces agricultural products for sale and whether you’re genuinely trying to turn a profit. A backyard garden or a few chickens kept for personal eggs almost certainly won’t qualify.
A useful benchmark comes from federal tax law, and many state agencies borrow it. An activity is presumed to be a for-profit business if it generates a net profit in at least three of the last five tax years. Horse breeding, training, showing, and racing get a more generous test of two profitable years out of seven.1Office of the Law Revision Counsel. 26 USC 183 – Activities Not Engaged in for Profit Falling short doesn’t automatically disqualify you, but it invites closer scrutiny.
Many states also set minimum income or acreage thresholds. Some require a minimum annual gross income from farm sales; others look at what percentage of your total income comes from agriculture. The dollar figures vary widely by state, from no specific minimum to several thousand dollars in annual farm revenue.
Qualifying activities typically include crop production, livestock, dairy, poultry, aquaculture, beekeeping, and nursery operations. Some states exclude timber harvesting from their definition of farming for sales tax purposes, so check your state’s rules if forestry is part of what you do.
Gather Your Documents
Whichever state you’re in, expect to provide three things:
- Business identification: your Federal Employer Identification Number (EIN) or Social Security Number, plus your business’s legal name.
- Farm details: physical address, type of operation, crops or livestock produced, and estimated annual farm revenue.
- Proof of farming activity: a copy of your federal Schedule F (Profit or Loss from Farming), filed with your Form 1040, is the single most commonly requested document.2Internal Revenue Service. About Schedule F (Form 1040), Profit or Loss From Farming
If you rent out your farmland rather than working it yourself, some states accept IRS Form 4835 (Farm Rental Income and Expenses) in place of Schedule F. A few states also ask for a business plan, proof of land ownership or lease, or photos of the operation, particularly from first-time applicants.
Submit the Application
Start at your state’s department of revenue website. Search for “agricultural exemption” or “farm tax exemption” and you’ll find the application form, instructions, and eligibility criteria specific to your state. Some states run the whole process online. Others still require paper forms by mail or in person.
Processing times vary. States with online systems may approve applications within a few weeks. States that review manually can take a couple of months. Once approved, you’ll receive your exemption by mail or email in one of three formats, depending on the state:
- An exemption number tied to your farm, which you give to vendors at the point of sale.
- A blank exemption certificate you fill out for each vendor, with no number attached.
- A hybrid, where you receive a number that you then write onto exemption certificates.
The format matters less than the outcome. In every case, the end result is that qualifying farm supplies — feed, seed, fertilizer, equipment, and similar inputs used directly in agricultural production — come home without sales tax added at the register.
Use the Exemption at the Point of Sale
If your state issued you a number, give it to the vendor when you make a qualifying purchase. In most cases you’ll also fill out an exemption certificate that the seller keeps on file. The certificate documents why no sales tax was collected and protects the seller during an audit.
A properly completed certificate typically includes the seller’s name and address, your name and address, a description of what you’re buying, a statement that the purchase is for agricultural production, and your signature. The seller keeps the original. Keep a copy for yourself.
Present the exemption at the time of purchase. If you forget and pay sales tax, you can usually file a refund claim with your state tax agency afterward, though the paperwork rarely justifies the effort on a bag of feed. On big-ticket equipment, it’s worth doing.
One boundary worth knowing before you try to use the number: it only covers items used in your commercial agricultural operation. Personal-use purchases from a farm supply store don’t qualify, and dual-use items like an ATV or a pickup that splits time between the farm and personal errands sit in a gray area that most states resolve against the exemption unless farming is the primary use.
Buying From Out-of-State Vendors
Twenty-four states participate in the Streamlined Sales and Use Tax Agreement, which provides a standardized exemption certificate accepted across all member states.3Streamlined Sales Tax Governing Board. Streamlined Sales Tax The certificate includes a specific field for agricultural production exemptions.4Streamlined Sales Tax Governing Board. Streamlined Sales and Use Tax Agreement Certificate of Exemption
Not every exemption listed on the standardized certificate is valid in every member state, so verify that the state where the purchase occurs actually recognizes agricultural exemptions before assuming you’re covered. For purchases from a non-member state, you’ll need that state’s own exemption certificate. These certificates go directly to the vendor, not to the Streamlined Sales Tax Governing Board or any state agency.5Streamlined Sales Tax Governing Board. Exemptions
Keep the Exemption Active
Most states require periodic renewal. Cycles typically run from one to four years. Some states mail renewal packets automatically before your certificate expires. Others expect you to initiate the process. Miss the deadline and your exemption lapses, meaning you’ll pay sales tax on purchases until you sort it out. Mark the expiration date on your calendar the day the certificate arrives.
If your operation changes — you move, change ownership, add a partner, or shift from crops to livestock — notify your state tax agency promptly. Changes to your business details can affect your status.
Keep copies of every exemption certificate you give to a vendor, along with receipts for all tax-exempt purchases. State laws generally require you to retain these records for three to seven years. A simple file organized by year and vendor saves significant trouble if an auditor ever asks about a purchase from four years back.
If You’re Denied or Just Starting Out
A denial usually means the state decided your operation doesn’t meet eligibility criteria. Perhaps farm income fell below the required threshold, or the documentation didn’t adequately demonstrate a commercial operation. Most states let you appeal or reapply once you address the deficiency. Filing a complete Schedule F showing farm income and expenses is often the most effective fix for a weak application.2Internal Revenue Service. About Schedule F (Form 1040), Profit or Loss From Farming
If your operation is genuinely new and doesn’t yet have a tax return showing farm income, ask the state agency what alternative documentation they accept. Some states will issue provisional exemptions to startup farms based on a business plan and proof that you’ve invested in land, equipment, or livestock.