Deductible farm expenses cover nearly every cost of operating a farm, from seed, feed, and fuel to wages, insurance, interest, repairs, and depreciation on equipment and buildings. You report them on Schedule F (Form 1040), where allowable expenses are subtracted from gross farm income to arrive at net farm profit or loss. Some costs come off your income in the year you pay them; others must be capitalized and recovered over several years; a handful carry special caps or timing rules that catch farmers by surprise.
What Qualifies as a Deductible Farm Expense
Every write-off has to clear the same threshold: the cost must be both ordinary and necessary for your farming operation.1Office of the Law Revision Counsel. 26 U.S. Code 162 – Trade or Business Expenses Ordinary means the expense is common in farming. Necessary means it’s helpful and appropriate for how you run the business. Cattle feed passes without argument. A bass boat used occasionally to check drainage on your back forty does not.
You also have to be farming for profit, not as a hobby. The tax code presumes you have a profit motive if the operation shows a profit in at least three of the last five tax years.2Office of the Law Revision Counsel. 26 USC 183 – Activities Not Engaged in for Profit Fall short and you can still qualify, but you carry the burden of proving intent. Hobby classification means you lose the ability to deduct farm losses against other income.
Timing depends on your accounting method. Most farmers use the cash method and deduct expenses in the year they’re paid. Accrual-method farmers deduct in the year the expense is incurred. Farm C corporations and partnerships with a C corporation partner generally must use accrual once average annual gross receipts over the prior three years cross an inflation-adjusted threshold ($31 million for recent years), while S corporations, nurseries, sod farms, and tree operations other than fruit and nut trees are exempt.3Internal Revenue Service. Publication 225 – Farmer’s Tax Guide
Everyday Operating Expenses
Costs that don’t create or improve a long-term asset come off in the year you pay or incur them. These make up the bulk of most Schedule F returns:
- Wages paid to farm employees, payments to contract labor, and the employer’s share of Social Security and Medicare taxes.
- Seed, feed, fertilizer, chemicals, bedding, and other supplies consumed during the operation.
- Repairs that restore machinery or structures to their prior working condition without meaningfully extending useful life or increasing value. Replacing worn belts on a combine is a repair; rebuilding an engine to modern specs likely crosses into an improvement.
- Fuel and oil for tractors, irrigation pumps, grain dryers, and other equipment. If you also claim the federal fuel tax credit for off-highway use, include that credit amount in gross farm income so it offsets the deduction you already took.3Internal Revenue Service. Publication 225 – Farmer’s Tax Guide
- Rent for leased farmland, pasture, and equipment.
- Insurance premiums covering crops, livestock mortality, liability, and property.
- Interest on operating loans, farm mortgages, and equipment financing, as long as the borrowed funds went to the farm.
- Electricity, water, phone, and internet allocable to the farming operation.
The line between a deductible repair and a capitalized improvement is where IRS attention lands during audits. Work that adds something new, makes the asset substantially better, or restores it from serious disrepair is an improvement, and improvements must be depreciated rather than expensed.
Farm Vehicles
Trucks and other farm vehicles get their own rules because most see some personal use. You may only deduct the business-use share, calculated one of two ways.
Under the actual expense method, you deduct the business-use percentage of all vehicle costs: fuel, repairs, insurance, registration, loan interest, and depreciation. You keep a log tracking business versus personal miles. Under the standard mileage method, you multiply business miles by the annual rate (72.5 cents per business mile for 2026).4Internal Revenue Service. Standard Mileage Rates and Maximum Automobile Fair Market Values Updated for 2026 The standard rate isn’t available if you’ve previously claimed Section 179 or bonus depreciation on the vehicle.
Farmers have a useful shortcut. A safe harbor under Treasury Regulation ยง1.274-6T(b) lets you treat 75% of a vehicle’s use as business without keeping detailed mileage records, provided the vehicle is used during most of the normal business day directly in farming. You must elect the safe harbor in the vehicle’s first year of service, and once chosen you’re locked in for the life of that vehicle.
Costs You Must Depreciate
Any asset with a useful life beyond one year has to be capitalized and recovered over several years through depreciation. Barns, grain bins, tractors, fencing, irrigation systems, and breeding livestock all fall here. Land itself is never depreciable because it doesn’t wear out, though land improvements like ponds, drainage tile, and terracing are.
The Modified Accelerated Cost Recovery System (MACRS) assigns each asset a recovery period.5Internal Revenue Service. Topic No. 704 – Depreciation New farm machinery and equipment placed in service after 2017 uses a five-year period. Used farm machinery uses seven years. Farm buildings generally use 20 years, and residential rental property on a farm uses 27.5 years.3Internal Revenue Service. Publication 225 – Farmer’s Tax Guide
Small purchases don’t have to run through depreciation. The de minimis safe harbor election lets you immediately deduct tangible property costing $2,500 or less per item or invoice if you don’t have audited financial statements ($5,000 if you do).6Internal Revenue Service. Tangible Property Regulations – Frequently Asked Questions Hand tools, small implements, and replacement parts typically qualify. Splitting a larger purchase across invoices to slip under the threshold isn’t allowed.
Faster Write-Offs: Section 179 and Bonus Depreciation
Two tools let you accelerate deductions on large purchases, which matters most in high-income years.
Section 179 Expensing
Section 179 lets you deduct the full cost of qualifying property in the year you place it in service.7Office of the Law Revision Counsel. 26 USC 179 – Election to Expense Certain Depreciable Business Assets The base annual dollar limit is $2.5 million, with a dollar-for-dollar phaseout that begins once qualifying property placed in service exceeds $4 million.8Internal Revenue Service. Instructions for Form 4562 (2025) Both figures adjust annually for inflation starting with tax years after 2025.
Qualifying property includes farm machinery and equipment, breeding livestock, single-purpose agricultural structures such as greenhouses and poultry houses, and certain improvements to nonresidential buildings. SUVs over 6,000 pounds are capped at $25,000. The key limitation: Section 179 cannot create or increase an overall business loss. Your deduction is capped at taxable income from all active trades or businesses, and any unused amount carries forward.
Bonus Depreciation
Bonus depreciation runs alongside Section 179 but has no taxable income limit, which means it can create or deepen a loss. The One Big Beautiful Bill Act permanently restored 100% bonus depreciation for qualifying property acquired and placed in service after January 19, 2025.9Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill Property placed in service on or before that date still falls under the earlier phasedown rates (60% in 2024, 40% in 2025). Plants used in farming that are planted or grafted after January 19, 2025, also qualify for 100% bonus depreciation.
The common approach is to apply Section 179 first up to the taxable income limit, then use bonus depreciation on whatever cost remains. Under current rules, a farmer buying $3 million of equipment could potentially deduct the entire amount in a single year.
Prepaid Supplies and Conservation Costs
Cash-method farmers often buy feed, seed, and fertilizer before year-end for the next season, pulling the deduction into the current year. There’s a limit: if prepaid supplies exceed 50% of all other deductible farming expenses for the year, the excess deduction is deferred to the year the supplies are actually used.10Office of the Law Revision Counsel. 26 U.S. Code 464 – Limitations on Deductions for Certain Farming Expenses An exception applies for farmers whose principal residence is on a farm and whose principal occupation is farming, provided prepaid supplies over the prior three years stayed below the 50% mark. The rule also doesn’t apply where supplies are held because of casualty, disease, or drought.
Soil and water conservation work is a second area with its own timing rule. Costs for erosion control, drainage, earthen dams, terracing, and similar conservation practices can be deducted currently rather than capitalized, up to 25% of your gross farm income for the year.11Justia Law. 26 U.S.C. 175 – Soil and Water Conservation Expenditures; Endangered Species Recovery Expenditures Anything above the cap carries forward to future years under the same limit. The provision also covers endangered species recovery expenditures on farmland.
Self-Employment Tax and Its Deduction
Net farm income on Schedule F is subject to self-employment tax at a combined 15.3% (12.4% Social Security plus 2.9% Medicare), on top of regular income tax. You can deduct half of your self-employment tax as an adjustment to income on Form 1040, which reduces adjusted gross income and income tax liability.
Farm Income Averaging
Farming income swings year to year, and good years can push you into higher brackets. Farm income averaging lets you elect to spread your current year’s farm income across the three prior tax years, effectively applying those years’ lower marginal rates to a portion of the current income.12Office of the Law Revision Counsel. 26 USC 1301 – Averaging of Farm Income You don’t have to have been farming during the base years. Sole proprietors, partners, and S corporation shareholders all qualify. Gain from selling farm equipment (other than land) counts as eligible farm income for the election. This isn’t a deduction, but it’s one of the most overlooked tools for cutting the tax bill in a strong year.
Depreciation Recapture When You Sell
When you sell depreciated farm equipment for more than its adjusted basis, the IRS claws back the depreciation you previously deducted. Farm equipment, vehicles, and livestock are Section 1245 property, so prior depreciation is recaptured and taxed as ordinary income rather than at capital gains rates. If you bought a tractor for $80,000, claimed $60,000 of depreciation, and sold it for $40,000, the $20,000 gain is taxed as ordinary income. Only gain exceeding total depreciation taken would qualify for capital gains treatment. Equipment sold at a loss isn’t subject to recapture.
Recordkeeping That Holds Up
Good records make filing easier and give you a defense if a deduction is questioned. Keep receipts, invoices, cancelled checks, and bank statements for every farm expense. For mixed personal and business use, maintain a log showing how you calculated the business percentage.
Vehicle records deserve extra attention because they’re among the most frequently challenged deductions. If you don’t use the 75% safe harbor, keep a log with the date of each trip, mileage driven, destination, and business purpose. Weekly logging is acceptable; daily is more reliable. Note odometer readings at the start and end of the year to establish the business-use percentage.
Hold farm records for at least three years after filing. Keep depreciable asset records for at least three years after the final depreciation deduction or the year of sale, whichever is later. If you claimed Section 179 or bonus depreciation, keep the purchase documentation for as long as you own the asset, because recapture rules mean the IRS can tax prior deductions when you eventually sell, and you’ll need the original cost basis to back up your numbers.