Self-employment tax for farmers is a 15.3% levy on net farm earnings, covering the Social Security and Medicare contributions an employer would normally split with a wage earner. It kicks in once your net earnings from farming reach $400 for the year, and for many small operations the self-employment bill runs higher than the income tax bill.1Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
Who Owes It
If you run a farm as a sole proprietor or as a partner in a farming partnership, the IRS treats you as self-employed. The same treatment applies to share farmers who grow crops or raise livestock on another person’s land in exchange for a portion of the harvest, provided the landowner materially participates in production decisions.2Office of the Law Revision Counsel. 26 USC 1402 – Definitions
The definition of farming is broad. It covers dairies, poultry operations, ranches, orchards, fish farms, and any enterprise where the primary work involves cultivating soil or raising agricultural commodities.3Internal Revenue Service. Publication 225 (2025), Farmer’s Tax Guide Farming as a side business alongside off-farm employment still faces self-employment tax on its own earnings. The $400 threshold is not indexed for inflation and hasn’t changed in decades.
One boundary worth stating up front: straight cash rent from farmland you own is passive rental income and is not subject to self-employment tax. Crop-share rent is different, and the distinction depends on material participation, covered below.
How the Rate Breaks Down
The 15.3% rate consists of 12.4% for Social Security and 2.9% for Medicare. The Social Security portion applies only to net self-employment earnings up to $184,500 in 2026.4Social Security Administration. Contribution and Benefit Base Off-farm wages count toward that cap first, reducing the farm income exposed to the 12.4% rate. The Medicare portion has no cap.
An extra 0.9% Medicare tax applies once combined self-employment income and wages exceed $200,000 for single filers or $250,000 for married couples filing jointly.5Internal Revenue Service. Questions and Answers for the Additional Medicare Tax Most small operations won’t reach that, but larger farms and those with significant outside income should plan for it.
You can deduct the employer-equivalent half of your self-employment tax when calculating adjusted gross income. This deduction reduces income tax but does not reduce the self-employment tax itself or the net earnings figure it’s calculated from. It’s an above-the-line deduction, so you get it whether you itemize or take the standard deduction.1Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
Calculating Net Farm Earnings
Start with gross farm income on Schedule F. That includes revenue from selling crops or livestock you raised, patronage dividends from cooperatives, government program payments such as livestock indemnity or forage disaster payments, and crop insurance proceeds. Sales of livestock or commodities you bought for resale belong on Schedule F too.3Internal Revenue Service. Publication 225 (2025), Farmer’s Tax Guide
Subtract ordinary and necessary farm expenses: seed, fertilizer, feed, fuel, hired labor, equipment depreciation, insurance premiums, and similar costs. The result is your net farm profit on line 34 of Schedule F.6Internal Revenue Service. Schedule F (Form 1040) – Profit or Loss From Farming
Then multiply net profit by 92.35% to get the figure that actually faces the tax.7Internal Revenue Service. Topic No. 554, Self-Employment Tax The 7.65% reduction reflects the fact that wage earners don’t pay FICA on the employer’s share. On a $50,000 net farm profit, only $46,175 is subject to the 15.3% rate, producing self-employment tax of roughly $7,065.
CRP Payments Catch People Off Guard
Conservation Reserve Program annual rental payments generally count as self-employment income and face the full 15.3%, even if you’re no longer actively farming the enrolled land. There is one exception: if you’re already receiving Social Security retirement or disability benefits, CRP annual rental payments are excluded from self-employment income.8Internal Revenue Service. Conservation Reserve Program Annual Rental Payments and Self-Employment Tax Payments for permanently retiring cropland base and allotment history are treated as capital asset sales and are never subject to self-employment tax.
Crop-Share Rent and Material Participation
Landowners who receive crop-share rent face a fork in the road. If you materially participate in growing the crop, the IRS treats that income as self-employment earnings. If you don’t, the income stays passive rental and avoids self-employment tax, but it also earns you no Social Security credits.2Office of the Law Revision Counsel. 26 USC 1402 – Definitions
Material participation means real involvement in production decisions, whether that’s directing what gets planted, making management decisions about inputs, or physically doing some of the work.9eCFR. 26 CFR 1.1402(a)-4 – Rentals From Real Estate An agent or farm manager acting on your behalf doesn’t count toward the requirement.
The Farm Optional Method for Low-Profit Years
The farm optional method lets you report higher net earnings than you actually earned. That sounds backwards, but it exists to keep bad years from wiping out your Social Security coverage. If drought, flooding, or commodity prices push your actual net farm profit near zero or into a loss, you’d normally earn no credits for that year. The optional method lets you keep paying in.
You qualify if your gross farm income was $10,860 or less, or if your net farm profits were less than $7,840. Under the method, you report two-thirds of your gross farm income, up to $7,240, as your net earnings for self-employment tax purposes.10Internal Revenue Service. Instructions for Schedule SE (Form 1040) You’ll owe self-employment tax on that reported amount even though your real profit was lower, but you’ll accumulate the Social Security credits.
A separate nonfarm optional method exists for other self-employment income, and it carries an additional restriction that net profits be less than 72.189% of gross. That percentage limit does not apply to the farm version. Don’t mix the two rules when filing.
How and When to Pay
Farm income flows from Schedule F to Part I of Schedule SE, where the 92.35% multiplier and 15.3% rate produce the self-employment tax owed. Both schedules attach to your Form 1040.10Internal Revenue Service. Instructions for Schedule SE (Form 1040)
Farmers get a friendlier estimated-tax schedule than other self-employed taxpayers. If at least two-thirds of your gross income comes from farming, you can skip quarterly payments and instead either make a single estimated payment by January 15 of the following year or file your return and pay everything owed by March 1.11Internal Revenue Service. Topic No. 416, Farming and Fishing Income The March 1 route is the simplest: file the completed return with full payment by that date and you owe no estimated tax penalty regardless of the amount due.12Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
Farmers who don’t meet the two-thirds test fall back to the standard quarterly schedule using Form 1040-ES. The Electronic Federal Tax Payment System is a reliable way to submit payments and keep a clean record of dates. Missing required estimated payments can trigger penalties once total tax owed at filing exceeds $1,000.