How to Qualify for Farm Tax Exemption in Oregon

To get the farm tax exemption in Oregon — technically a special assessment that taxes qualifying farmland on its agricultural productivity rather than market value — the path depends on your zoning. Land inside an Exclusive Farm Use (EFU) zone qualifies automatically as long as it’s farmed exclusively, with no application and no income test. Land outside an EFU zone requires a formal application to your county assessor by April 1, two prior years of exclusive farm use, and proof that the operation meets Oregon’s gross income thresholds.¹²

Start With Your Zoning

Zoning decides almost everything about how you qualify. Check your most recent property tax statement or call your county planning department to confirm whether your parcel sits inside an EFU zone.

If it does, the county assessor should already be taxing you at the agricultural rate. The statute is direct: EFU-zoned land used exclusively for farm use qualifies, with no application needed.¹

If your land is outside an EFU zone, you have more to prove. You need to show the land has been used exclusively for farming for at least the two prior years, you have to meet the income thresholds described below, and you must apply.² One trap worth flagging: if you’ve granted anyone a lease or option to buy the surface rights for a non-farm purpose, your land won’t qualify. Mineral exploration leases and recreational agreements that don’t interfere with farming are exceptions.

What Counts as Farm Use

Oregon defines farm use broadly, but the core idea is that you’re using the land to make money through agriculture. Qualifying activities include growing and selling crops; raising livestock, poultry, fur-bearing animals, or honeybees; running a dairy; stabling or training horses, including lessons and clinics; aquaculture and permitted wildlife cultivation; and nursery or horticultural production.³

Land temporarily out of production still counts in some cases. Fallow ground resting as part of normal crop rotation qualifies, as does acreage planted with orchards or vineyards that haven’t matured. Woodlots up to 20 acres on the same property count. Timber taxed under Oregon’s separate forestland program does not, though cultured Christmas tree farms are an exception.

Profit motive matters. Simply owning open acreage won’t get you the assessment, no matter the parcel size. The land has to be actively employed in an agricultural operation aimed at generating revenue.⁴

Income Thresholds for Non-EFU Land

If your land is outside an EFU zone, your farm has to generate real income in at least three of the five full calendar years before the assessment date:⁵

6.5 acres or less: at least $650 in gross farm income per year
More than 6.5 but less than 30 acres: at least $100 per acre (or fraction of an acre) per year
30 acres or more: at least $3,000 in gross farm income per year

When you calculate acreage for the tier, exclude up to one acre used as your homesite. So on a 7-acre parcel with a house, only 6 acres count toward the tier.⁶

Gross income can include the value of crops and livestock you consume personally or use in the operation, provided you keep accurate records and value the products at normal market prices. Personal consumption can’t exceed 49 percent of the required threshold.⁷ Government program payments and rent from leasing your land to another farmer for agricultural use also count. The purchase cost of livestock does not.

How to Apply

EFU landowners generally don’t need to do anything; the assessor classifies that land for special assessment as a matter of course. The steps below apply to non-EFU land.

File your application with the county assessor on or before April 1 of the first year you want the special assessment.⁸ The Oregon Department of Revenue prepares the forms, and your county assessor’s office provides them. Miss April 1 and you wait a full year.

Plan on providing:

Property tax account numbers for each parcel
A map or description showing which portions are in active agricultural use
IRS Schedule F from your recent tax returns, which Oregon requires as proof of farm income⁹
Rental income documentation if someone else farms the land under a lease
A description of your farm operations, including crop types, animal counts, or other specifics

Expect a possible site visit. The assessor is looking for real evidence of farming: equipment, crops in the ground, livestock, irrigation. A formal notice of approval or denial follows the review.

What the Assessment Doesn’t Cover

Even on qualifying land, the house and the ground under it are taxed at regular value. Oregon treats up to one acre around your dwelling as a homesite assessed at market rates.⁶ Buildings, equipment, and other improvements are also assessed at standard values. The special assessment covers only the farmed land itself.

Disqualification and Rollback Taxes

Losing the assessment is expensive, and the bill reaches backward.

EFU land loses the assessment when the assessor finds it’s no longer being farmed, when it’s rezoned out of EFU, or when a non-farm dwelling is built on it.¹⁰ Non-EFU land is typically disqualified when it stops meeting the income requirements or stops being farmed.¹¹

When disqualification hits, the county recalculates what your taxes would have been at full market value for prior years and bills you the difference. For non-EFU land, the rollback covers up to five years of tax savings. For EFU land, it can reach back up to ten. On a property where the special assessment saved several thousand dollars a year, a ten-year rollback can produce a bill in the tens of thousands.

If you’re thinking about converting farmland to another use, run the rollback numbers with your county assessor before you commit. Keep income records current, maintain active agricultural operations, and return any gross income questionnaires your assessor sends you on time.

1
Oregon Public Law. Oregon Code ORS 308A.062 – Qualification of Exclusive Farm Use Zone Farmland
2
Oregon Public Law. Oregon Code ORS 308A.068 – Qualification of Nonexclusive Farm Use Zone Farmland
3
Oregon Public Law. Oregon Code ORS 308A.056 – Definition of Farm Use
4
National Agricultural Law Center. Oregon Code 308A – Differential Tax Assessment of Agricultural Land
5
Oregon Public Law. Oregon Code ORS 308A.071 – Income Requirements for Nonexclusive Farm Use Zone Farmland
6
Oregon State Legislature. Oregon Revised Statutes Chapter 308A – Land Special Assessments
7
Oregon Public Law. Oregon Administrative Rule 150-308-1050 – Gross Income Requirement
8
Oregon State Legislature. Oregon Revised Statutes 308A.077 – Application to Qualify Nonexclusive Farm Use Zone Farmland
9
Oregon Department of Revenue. Assessment of Farmland Not in an Exclusive Farm-Use Zone
10
Oregon Public Law. Oregon Code ORS 308A.113 – Disqualification of Exclusive Farm Use Zone Farmland
11
Oregon Public Law. Oregon Code ORS 308A.116 – Disqualification of Nonexclusive Farm Use Zone Farmland