How to Qualify for Farm Tax Exemption in NY: Forms and Deadlines

To qualify for a farm tax exemption in NY, your operation generally needs at least seven acres in agricultural production for the past two years with average annual gross sales of $10,000 or more, and you file Form RP-305 with your local assessor by the taxable status date (March 1 in most towns). That’s the headline program, called the agricultural assessment, which values farmland by soil productivity instead of market price. Separate exemptions cover sales tax on farm purchases, property tax on new farm buildings, and several federal credits. Each has its own form and deadline, and missing any one of them costs a full tax year of savings.

Who Qualifies for the Agricultural Assessment

The agricultural assessment program lives under Article 25-AA of the Agriculture and Markets Law, not the Real Property Tax Law. The basic eligibility test is sometimes called the 7-7-10 rule: at least seven acres, used for agricultural production during the preceding two years, with average annual gross sales of $10,000 or more over that two-year window.¹ Qualifying production includes crops, livestock, livestock products such as honey or wool, and commercial horse boarding.

Smaller operations face a higher financial bar. Land under seven acres qualifies only if it produces average annual gross sales of $50,000 or more over the same two-year period.² The threshold is meant to separate serious small-acreage producers from hobby gardens.

Rented farmland can qualify too. If a rented parcel independently meets the acreage and sales requirements, it’s eligible on its own. If it falls short on sales but meets the other criteria, it can still qualify when farmed under a written lease of at least five years alongside land that is already eligible.² In that case you’ll provide either a copy of the lease or Form RP-305-c to the assessor.

Inside vs. Outside an Agricultural District

There are two paths into the program. Most applicants own land inside a state-certified agricultural district, which counties create to cover large tracts of actively farmed land. Applying under Agriculture and Markets Law Section 305 is the more straightforward route.³

If your land sits outside a district, you can still apply under Section 306, but you must commit to keeping the land in agricultural use for eight years.⁴ Breaking that commitment early triggers roll-back taxes. The soil worksheet you file with your application has a checkbox for which route applies, so the distinction follows you through every step.

Forms to File and When

New applicants start with Form RP-305, which asks for total acreage, how many acres serve each agricultural purpose, and gross sales figures proving you meet the threshold. File it for each separately assessed parcel. Once approved, in years when nothing about the parcel changes, you can use the shorter renewal Form RP-305-r.⁵

Before your first application, your county Soil and Water Conservation District office prepares a soil group worksheet (Form APD-1) for each parcel.⁴ A technician uses your tax map to classify soil into productivity groups; higher-quality soil translates to a lower taxable value relative to market price.⁶ The worksheet also splits the parcel into agricultural land, farm woodland up to 50 acres, excess farm woodland, and non-agricultural land. Only the agricultural portions get the reduced assessment. Once a current worksheet is on file, you generally don’t need a new one unless boundaries change.

Depending on your situation, you may also need one of these supplemental forms:

Form RP-305-b, if your gross sales fell short because of a natural disaster or prolonged adverse weather and you’re applying for an exception.
Form RP-305-c, for rented land that doesn’t independently meet the sales threshold but is farmed under a five-year written lease alongside eligible land.
Form RP-305-e, for new orchards and vineyards not yet in full production.

Submit the completed package to your local municipal assessor by the taxable status date, which is March 1 in most communities.⁷ Some jurisdictions use a different date, so confirm with your assessor. One exception: in a year when your municipality conducts a revaluation or assessment update, the deadline is 30 days before the tentative assessment roll filing date.⁴

Filing is annual. Even after initial approval, you file either RP-305 or the renewal RP-305-r every year for every enrolled parcel. Miss the deadline once and you lose the reduced assessment for that tax year.

What Happens if You Convert the Land

Converting land that receives an agricultural assessment to a non-agricultural use triggers roll-back taxes equal to the taxes saved over the prior five years, plus interest.⁸ The penalty applies only to the portion actually converted, not the whole parcel. On high-value land near suburban growth corridors, the bill can be large, so run the numbers before selling for development or retiring acreage from production.

Sales Tax Exemption on Farm Purchases

Separate from the property tax programs, New York exempts many farm purchases from sales tax. You claim it by presenting Form ST-125, the Farmer’s Exemption Certificate, to vendors at the time of purchase.⁹ The exemption covers tangible personal property used predominantly in farm production: equipment, building materials, feed, seed, fencing, and materials used to build, repair, or maintain structures that are themselves used predominantly in production.

Predominantly means more than 50% of the item’s use, measured by hours, miles, or another reasonable metric.⁹ A tractor used 60% for field work and 40% for personal property maintenance qualifies. Reverse those percentages and it doesn’t. Auditors do check usage logs on dual-use vehicles and equipment.

The exemption applies to the item, not to services. Veterinary care, equipment repair labor, and similar services are generally taxable even when performed for a farm. Once you have an ongoing relationship with a supplier, keeping a current ST-125 on file eliminates the need to present it at every transaction.

Property Tax Exemption for New Farm Buildings

Ten-Year Exemption Under RPTL Section 483

When you build or reconstruct a structure essential to farming operations, the added assessed value from that construction is exempt from property tax for ten years under Real Property Tax Law Section 483.¹⁰ The underlying land value isn’t affected, only the bump caused by new construction. Covered structures include barns, greenhouses, and storage buildings used in production.

To qualify, the land must be at least five acres and actively used in bona fide agricultural or horticultural production carried on for profit. File Form RP-483 with your local assessor on or before the taxable status date and within one year of completing construction.¹⁰ Both deadlines apply. The owner’s personal dwelling doesn’t qualify, but housing for regular employees primarily employed in farming operations does.

Permanent Exemption Under RPTL Section 483-a

Certain specialized structures get a permanent exemption instead of a ten-year one. Section 483-a covers silos and forage storage structures, feed grain storage bins, commodity sheds, bulk milk tanks and coolers, and manure storage and handling facilities.¹¹ These structures are explicitly excluded from Section 483 because they get better treatment here: full exemption with no expiration, so long as they remain permanently affixed to agricultural land. If you’re building a new silo or manure lagoon, file under 483-a rather than 483.

Federal Benefits That Stack On Top

New York’s programs handle property and sales taxes. Several federal benefits sit alongside them and are claimed on your federal return.

Section 179 for Equipment

Instead of depreciating equipment over several years, Section 179 lets you deduct the full purchase price in the year you place it in service. For the 2026 tax year, the maximum deduction is $1,160,000, phasing out when total equipment purchases exceed $2,890,000. A separate $32,000 cap applies to certain utility vehicles. Farm equipment, vehicles, and some building improvements all qualify.

Federal Fuel Tax Credit

Gasoline and undyed diesel used on a farm for farming purposes qualify for a federal excise tax credit claimed on Form 4136. Based on the most recently published rates, the credit is $0.183 per gallon for gasoline and $0.243 per gallon for undyed diesel.¹² It covers off-highway agricultural use: tractors, combines, irrigation pumps, and similar equipment that never touches a public road. Keep fuel purchase records; the credit is applied against your income tax at filing.

Estate Tax and Special Use Valuation

Passing a farm to the next generation raises federal estate tax concerns on larger operations. The basic federal estate tax exclusion for 2026 is $15,000,000 per individual, following the increase enacted by the One, Big, Beautiful Bill signed in July 2025.¹³ Married couples can effectively double that through portability.

For estates that exceed the exclusion, Section 2032A lets the executor value qualifying farm real estate at its agricultural use value rather than fair market value. The maximum reduction for 2026 is $1,460,000. To qualify, farm real estate must represent at least 50% of the adjusted gross estate value, the decedent or a family member must have actively farmed the land for at least five of the eight years before death, and every person with an interest in the property must sign an agreement consenting to potential recapture if the land leaves farm use within ten years after the decedent’s death.¹⁴ Farm transfer planning is complex enough that professional help usually pays for itself.

1
New York State Senate. New York Agriculture and Markets Law 301 – Definitions
2
New York State Department of Agriculture and Markets. Agricultural Assessment Program Overview
3
New York State Senate. New York Agriculture and Markets Law 305 – Agricultural Districts Effects
4
Department of Taxation and Finance. Agriculture and Markets Law Section 306 – Agricultural Land Outside Districts
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Tax.NY.gov. Form RP-305 Agricultural Assessment Application
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New York State Department of Agriculture and Markets. Soil Group Worksheet APD-1
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Department of Taxation and Finance. Property Tax Calendar
8
Department of Taxation and Finance. Conversion of New York Farmland Under Agricultural Assessment to Non-Farm Use
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Tax.NY.gov. Farmer’s and Commercial Horse Boarding Operator’s Exemption Certificate ST-125
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New York State Senate. New York Real Property Tax Law 483 – Exemption From Taxation of Structures and Buildings Essential to the Operation of Agricultural and Horticultural Lands
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New York State Senate. New York Real Property Tax Law 483-A – Farm Silos, Farm Feed Grain Storage Bins, Commodity Sheds, Bulk Milk Tanks and Coolers, and Manure Storage and Handling Facilities
12
Internal Revenue Service. Credit for Federal Tax Paid on Fuels – Form 4136
13
Internal Revenue Service. What’s New – Estate and Gift Tax
14
Office of the Law Revision Counsel. 26 USC 2032A – Valuation of Certain Farm Real Property