Employer guideRead at source September 28, 2026

Missouri New Hire Reporting: Deadline, What to Report and How to File (2026)

Missouri employers must report each new or rehired employee within 20 calendar days of the hire date, online through the Department of Social Services employer website or by mailing or faxing a W-4, MO W-4 or printed list. Missouri counts from the earlier of the day the W-4 is signed or the first day of work, so pre-boarding paperwork can start the clock. Independent contractors are not reportable, and an intentional failure is an infraction fined up to $25, or $350 where employer and employee conspire.

This page covers Missouri only. For the federal rules behind it and a side-by-side view of every state, start with our new hire reporting requirements by state guide. Missouri follows the federal model on the deadline, but it defines the hire date differently from federal law, and that one definition changes how an onboarding team should run the report.

Missouri new hire reporting at a glance

The Missouri difference: a signed W-4 can start the clock

Federal law defines the date of hire as the first day the employee performs services for pay. Missouri writes its own definition into RSMo 285.300: the date the employer hires the employee is the earlier of the date the employee signs the W-4 form or its equivalent, or the first date the employee reports to work, or performs labor or services. The Department of Social Services repeats that definition on its new hire FAQ.

For a frontline employer, the earlier date is usually the signature. Offer letters now go out with a link to an onboarding portal, and candidates complete tax forms from their phones days before orientation. If a warehouse associate signs a W-4 on the 1st and the start date slips to the 10th, the Missouri clock started on the 1st, not the 10th. A payroll system that keys the report off the first paid shift can be filing on time by federal logic and late by Missouri law.

The practical fix is small: in Missouri locations, record the W-4 signature date and use whichever date comes first as the reporting date. Batching reports weekly then keeps every hire inside the window even when orientation classes are rescheduled.

What goes on a Missouri report

The state lists the mandatory items on its data to report page, and they are the federal seven:

• Employee name (first, middle and last), address, Social Security number and date of hire
• Employer name (the corporate name), address and Federal Employer Identification Number

Missouri also accepts optional items, and one becomes mandatory in a specific case:

• Employer payroll address, meaning the address where income withholding orders should be sent
• Employee date of birth
• Employment type: full-time, part-time or temporary
• Employee state of hire, which is required if you report as a multistate employer
• Whether the employee is eligible for health insurance

Two housekeeping rules from the agency are worth building into your template. If you give only one address, make it the one where income withholding orders should go. If your company has more than one FEIN, report new hires under the same FEIN you use for quarterly wage reporting, so the state can match the two.

How to file in Missouri

The reporting methods page lists four routes:

• 1. Online entry on the Missouri employer website after you register.
• 2. A spreadsheet upload through the same site, which suits multi-location employers entering dozens of hires at once.
• 3. File Transfer Protocol using the state’s required file layout.
• 4. Mail or fax a federal W-4 with the employer name, FEIN and address written at the top, a MO W-4, or a printed list in at least 10-point type with the employer details at the top. Mail goes to Missouri Department of Revenue, PO Box 3340, Jefferson City, MO 65105-3340; the fax is 877-573-6172.

The mailing address is the Department of Revenue for a reason: the statute sends the forms there first, and Revenue forwards them to the Family Support Division weekly for entry into the State Directory of New Hires. Employers who key hires in by hand get a 90-day history under View New Hire History; anyone using the other routes can request a copy by phone, and records can take 24 to 48 hours to appear.

Twenty calendar days, or two transmissions a month

Under RSMo 285.300, the report is due within twenty days after the date the employer hires the employee. An employer reporting magnetically or electronically may instead send two monthly transmissions, if necessary, not less than twelve days nor more than sixteen days apart. Both routes are measured from Missouri’s hire date, so the W-4 point above applies to each.

Independent contractors: not part of Missouri reporting

Missouri does not ask for contractor reports. The federal Office of Child Support Services state contact guide lists no contractor requirement for Missouri, and the state’s own reporting duty is built around the W-4 that employees complete. Temporary staffing is handled by who pays: if the agency pays the wages, the agency reports; a firm that only refers candidates does not.

Penalties under RSMo 285.302

RSMo 285.302 makes it an infraction for an employer to intentionally fail to submit the required information, with a fine of not more than $25 for each failure. Where the failure comes from a conspiracy between employer and employee to skip the report or file a false or incomplete one, the fine is $350 for each failure or false report. The statute also reaches employees: refusing to complete the withholding form (RSMo 285.306) or knowingly stating on it that no child support is owed when it is (RSMo 285.308) is a class E felony.

Rehires, recalls and one extra duty at separation

Missouri does not publish a day-count threshold for rehires. Its test is the form: if a returning or recalled employee is required to submit a W-4, the employer must file a new hire report. Temporary agencies report a worker once, and again only after a break in service that requires a new W-4. For seasonal operations, that means the answer depends on your own rehire paperwork, so check whether returning crews complete a new W-4.

Missouri adds a step at the other end of employment. For an employee under a child support wage withholding order issued by the Family Support Division, the employer must report the termination within ten days, with the last known address and the new employer if known (RSMo 454.505.11). It can be done online or on page 3 of the Income Withholding for Support form.

Missouri and multistate employers

An employer with staff in two or more states that reports electronically can designate one state and send every new hire there, after notifying the U.S. Department of Health and Human Services. Missouri describes the option on its multistate employers page. Our state-by-state new hire reporting guide explains the registration and the twice-monthly filing that come with it.

Hiring in Missouri

New hire reporting is one line on a longer first-week list. For the rest of the state rules, see Missouri labor laws and the Missouri minimum wage; for the federal paperwork that lands the same week, see Form I-9 requirements, E-Verify requirements by state and our new hire forms checklist. Boostpoint runs social job ads that bring in applicants for frontline roles. Across our 2026 Social Job Advertising Benchmark (891 Boostpoint-managed campaigns on Meta), the median campaign cost $13.88 per applicant; the benchmark is not split by state.

Frequently asked questions