IRS Form 941 vs 943: Thresholds, Deposits, and Filing Rules

Form 941 and Form 943 are both employer returns for federal income tax withholding, Social Security, and Medicare, but they aren’t interchangeable. Form 941 is the quarterly return most employers file. Form 943 is the annual return used only by employers reporting wages for agricultural labor. The deciding factor is the kind of work your employees perform, not your industry label or business structure.¹²

Which Form You File

If you pay wages subject to federal income tax withholding or FICA, the default is Form 941, filed after each calendar quarter. Office staff, retail clerks, construction crews, warehouse workers — all Form 941.¹

Form 943 takes over only when the wages are for agricultural labor. The trigger is the nature of the work, not whether your operation is technically a farm. A landscaping company that also runs a produce operation would file Form 943 for its harvest crew and Form 941 for its landscaping crew.²

If you have both kinds of workers, you file both returns. Non-farm wages go on quarterly Form 941 filings; farm wages go on the annual Form 943.³ Once you file your first Form 943, the IRS expects one every year, even in years with no taxes to report, until you file a final return marking the account closed.⁴

One boundary to know: very small non-farm employers whose total annual liability for withheld income tax, Social Security, and Medicare runs $1,000 or less may qualify to file Form 944 annually instead of Form 941 quarterly.⁵ Form 944 is not available to agricultural employers. If you pay farmworkers, it’s Form 943 no matter how small the liability.

What Counts as Agricultural Labor

The IRS defines agricultural labor broadly. It covers work on a farm connected with cultivating soil, raising or managing livestock (including bees and poultry), and harvesting crops or other horticultural commodities.⁶ It also reaches handling, packing, drying, grading, and storing a raw farm commodity, so long as the worker is employed by the farm operator and the work is part of that farm’s operation. Cotton ginning and maintaining non-commercial irrigation systems qualify as well.

Some work performed on or near a farm doesn’t qualify. Forestry, lumbering, and landscaping fall outside agricultural labor. So do employees at a farm’s retail market or gift shop, whose wages belong on Form 941.

Filing Frequency and Due Dates

This is the most visible operational difference. Form 941 is due four times a year:¹

First quarter (January–March): due April 30
Second quarter (April–June): due July 31
Third quarter (July–September): due October 31
Fourth quarter (October–December): due January 31 of the following year

When a due date falls on a weekend or federal holiday, the deadline moves to the next business day.⁷

Form 943 is due once a year, on January 31 of the year after wages were paid. For tax year 2026, that date is a Sunday, so the deadline shifts to Monday, February 1, 2027. Both forms grant an extra 10 calendar days to file if you deposited all taxes on time throughout the period.⁸

For seasonal farm operations that only run payroll for a few months, the annual schedule is a real advantage. Instead of four quarterly returns with three of them showing zeros, you file once.

FICA Thresholds Work Differently

Here the two forms diverge sharply.

Under Form 941, every dollar of cash wages is subject to Social Security and Medicare taxes from the first paycheck. There is no floor.

Farm wages on Form 943 apply FICA only when one of two tests is met:⁴

Individual cash wage test: you pay a single farmworker $150 or more in cash wages during the calendar year.
Aggregate expenditure test: your total wages (cash and non-cash) to all farmworkers combined reach $2,500 or more during the calendar year.

Meeting either test makes all cash farm wages you paid that year subject to FICA, not just amounts above the threshold.⁹ A narrow carve-out applies to hand-harvest laborers paid on a piece-rate basis who commute daily from a permanent home and worked fewer than 13 weeks in agriculture the prior year; they’re excluded from the aggregate test, though the $150 individual test still applies.

These figures are set by statute and haven’t been indexed for inflation. They stay at $150 and $2,500 for 2026.

Non-Cash Wages Get a Cleaner Rule on Farms

For employees reported on Form 941, non-cash compensation such as meals and lodging is generally subject to FICA and income tax withholding unless it’s provided for the employer’s convenience on the business premises.

Farm wages work differently. Non-cash payments to agricultural workers — commodities, meals, housing — are entirely exempt from Social Security and Medicare taxes.¹⁰ You don’t include their value on the Social Security or Medicare wage lines of Form 943. Farms that provide room and board see a real simplification from this rule.

Deposits: Same Framework, Different Windows

All employment tax deposits go through the Electronic Federal Tax Payment System (EFTPS), whichever form you file. The tax becomes a liability when you pay wages, not when you file the return.

The IRS assigns you either a monthly or semiweekly deposit schedule based on your total tax liability during a lookback period. For Form 941 that lookback spans four quarters (July 1 of the second preceding year through June 30 of the prior year). For Form 943 it’s simply the entire second preceding calendar year.¹¹

Monthly depositor: lookback liability of $50,000 or less. Deposit by the 15th of the following month.
Semiweekly depositor: lookback liability over $50,000. Wednesday–Friday paydays deposit by the following Wednesday; Saturday–Tuesday paydays deposit by the following Friday.

If you accumulate $100,000 or more in tax liability on any single day, that amount must be deposited by the close of the next business day, and if you were a monthly depositor you become a semiweekly depositor for the rest of that calendar year and the following one.¹¹

One deposit shortcut favors Form 943 filers. If your total annual tax liability runs under $2,500, you can skip periodic deposits and pay the full amount with the return.⁸ Form 941 has an analogous rule, but the $2,500 threshold applies per quarter rather than per year, a much tighter window.

Filing 943 Doesn’t Cover Unemployment Tax

Neither form handles federal unemployment tax. Agricultural employers file Form 940 if they paid $20,000 or more in cash wages to farmworkers in any calendar quarter of the current or preceding year, or employed 10 or more farmworkers during at least part of the day in 20 or more different weeks across the current or preceding year.¹² These thresholds sit higher than the general Form 940 test for non-farm employers ($1,500 in wages in any quarter, or any employee for any part of a day in 20 or more weeks). Farm employers falling below both agricultural thresholds may owe no FUTA at all.

Penalties Are the Same on Both Forms

The penalty structure doesn’t distinguish between 941 and 943, and it can stack fast.

Filing late costs 5% of the unpaid tax per month (or partial month), up to 25%. If the return is more than 60 days late, the minimum penalty for returns due after December 31, 2025 is $525 or 100% of the unpaid tax, whichever is less.¹³ Paying late adds 0.5% per month of the unpaid balance, also capped at 25%, and interest runs on top. The IRS underpayment rate is 7% for the first quarter of 2026 and 6% for the second quarter.¹⁴

Late deposits carry a separate tiered penalty:¹⁵

1–5 days late: 2% of the undeposited amount
6–15 days late: 5%
More than 15 days late: 10%
Not deposited within 10 days of the first IRS delinquency notice: 15%

If You Filed the Wrong Form

A common mistake is reporting farm wages on Form 941 or non-farm wages on Form 943. You correct a Form 941 error with Form 941-X, and a Form 943 error with Form 943-X. The correction forms aren’t interchangeable, so a wrong-form filing means correcting the form the wages appeared on and reporting them on the form they belonged on.¹⁶

Deadlines depend on the error type. For overreported taxes on Form 941, you have three years from the original filing date or two years from the date the tax was paid, whichever is later. For underreported taxes, the window is three years from the filing date.¹⁷ Form 941 returns filed before April 15 of the following year are treated as filed on April 15 for this purpose. Form 943-X follows similar period-of-limitations rules.

1
Internal Revenue Service. Instructions for Form 941 (03/2026)
2
Internal Revenue Service. About Form 943, Employers Annual Federal Tax Return for Agricultural Employees
3
Internal Revenue Service. Publication 225 (2025), Farmers Tax Guide
4
Internal Revenue Service. Topic no. 760, Form 943 – Reporting and Deposit Requirements for Agricultural Employers
5
Internal Revenue Service. About Form 944, Employers Annual Federal Tax Return
6
eCFR. 26 CFR 31.3121(g)-1 – Agricultural Labor
7
Internal Revenue Service. Employment Tax Due Dates
8
Internal Revenue Service. Instructions for Form 943 (2025)
9
Office of the Law Revision Counsel. 26 U.S. Code 3121 – Definitions
10
Internal Revenue Service. 2025 Instructions for Form 943 – Employers Annual Federal Tax Return for Agricultural Employees
11
Internal Revenue Service. Publication 15 (2026), (Circular E), Employers Tax Guide
12
Internal Revenue Service. Instructions for Form 940 (2025)
13
Internal Revenue Service. Failure to File Penalty
14
Internal Revenue Service. Quarterly Interest Rates
15
Office of the Law Revision Counsel. 26 U.S. Code 6656 – Failure to Make Deposit of Taxes
16
Internal Revenue Service. Instructions for Form 941-X (Rev. April 2025)
17
Internal Revenue Service. Instructions for Form 941-X