Multiple Worksite Report (BLS-3020)
The Multiple Worksite Report is a quarterly report that breaks an employer's state-level employment and wage totals down by individual worksite. It supplements the quarterly unemployment insurance contribution report rather than replacing it - the totals are the same, but the MWR shows where those people actually work.
Most multi-location employers with 10 or more employees combined across their secondary locations in a state are required or requested to file it.
Who has to file?
The threshold applies per state, per unemployment insurance account - not company-wide.
- Your primary location in a state is the one with the most employment in that state.
- All other locations in that state are secondary.
- If those secondary locations together hold 10 or more employees, you're in scope.
So a company with 400 employees split across three states counts three separate times, and can be in scope in one state and out in another.
Is it mandatory or voluntary?
This is the part most guidance gets wrong. It depends on the state, and the Bureau of Labor Statistics publishes the list.
The MWR is mandatory in: Alabama, California, Colorado, Connecticut, Georgia, Hawaii, Iowa, Kansas, Louisiana, Maine, Maryland, Minnesota, Mississippi, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Rhode Island, Utah, Vermont, Virginia, West Virginia, Puerto Rico and the U.S. Virgin Islands.
Three carve-outs worth knowing:
- Florida and Texas - mandatory for professional employer organisations only.
- South Carolina - mandatory only for employers with more than 20 employees.
- Everywhere else, BLS describes it as "required or requested." It never uses the word voluntary.
(Source: BLS, Multiple Worksite Report state forms page. Verify your states before relying on this list - it is maintained by BLS and can change.)
When is it due?
There is no national deadline, and you cannot look one up.
BLS publishes none. The blank BLS-3020 form has a due date field that each state fills in. Deadlines are set by state law and practice, and the date arrives printed on the form your state sends you.
California illustrates how much this varies even within one state's own materials: the regulation says the report is due on or before the last day of the calendar month following the close of each quarter, while the state agency's guidance says it's due 30 days after you receive the report, with forms mailed in the first week after quarter end.
Practical rule: treat the date printed on your state's form as authoritative, and don't assume it's the same in every state you operate in.
What data does each worksite need?
| Field | Detail |
|---|---|
| UI account number | Pre-printed on the form |
| Worksite name and address | Street, city, state, ZIP |
| Worksite description | Must uniquely identify each worksite - plant name, store number |
| Monthly employment | Three separate counts, one per month of the quarter |
| Quarterly wages | Wages subject to state unemployment insurance, rounded to the nearest dollar |
| Change explanations | Required for large swings in employment or wages |
| Closures and sales | Noted on the form |
The counting error BLS names explicitly
The monthly employment figure is not the number of people you paid during the month. It is:
the total number of full- and part-time employees who worked during or received pay for the pay period which includes the 12th of the month.
The reference period depends on your pay cycle:
| Pay cycle | Reference period |
|---|---|
| Weekly | The 7 days containing the 12th |
| Biweekly | The 14 days containing the 12th |
| Semimonthly | The 1st through the 15th |
| Monthly | The calendar month |
Each employee is counted once, tracked by Social Security number.
BLS lists four errors it sees repeatedly:
- Counting everyone paid during the quarter instead of the reference pay period
- Counting paychecks issued - which inflates the number in any month with a bonus or commission run
- Cumulative "active employee" counts that climb and then drop when records are purged
- Counting available staff rather than people who actually worked or were paid
How do you file it?
Three routes:
Web reporting through the BLS Internet Data Collection Facility. Credentials are printed in a starred box on your current-quarter form. There's a chicken-and-egg problem worth planning around: no form means no credentials, so a new filer's first quarter is on paper and the credentials arrive on the next form. Once you submit online, paper forms stop.
The BLS EDI Center, which accepts one file covering all worksites in all states and distributes it to the individual states. BLS recommends this for employers with 200 or more worksites or those filing in multiple states, and it becomes the single point of contact for all MWR matters. For a multi-state employer, this is usually the right answer.
Paper, fax, mail or email to the state agency, depending on what that state accepts.
Where does the data go?
Into the Quarterly Census of Employment and Wages, which covers more than 95 percent of U.S. jobs and publishes employment and wage data by county, state and industry.
Worth understanding because it explains why the MWR exists: employers file nothing directly to BLS for QCEW. The census is built from the state UI records you already file, and the MWR is what lets BLS attribute a multi-location employer's numbers to the right county and industry. Without it, a company with 40 locations would appear as 40 locations' worth of employment at one address.
The other employer touchpoint is the Annual Refiling Survey, which contacts roughly a third of private businesses with three or more employees each year to verify industry and location classification.
What happens if you don't file?
There is no federal penalty provision, and no state materials reviewed for this page state an MWR-specific penalty amount.
In mandatory states the obligation runs through state unemployment insurance law, and enforcement sits with the state UI agency. Check your specific state rather than assuming there's no consequence - the absence of a published figure is not the absence of an obligation.
Where teams lose time
Different rules in every state. Mandatory in one, requested in the next, PEO-only in two, headcount-conditional in another - with different deadlines and different forms. There is no single national answer to any question about this report.
The worksite definition versus your own systems. Cost centres, payroll locations, legal entities and BLS worksites are four different groupings that rarely align. The description field has to uniquely identify each site, which means a maintained worksite register, not a location dropdown.
The 12th-of-the-month count. Most HR systems produce headcount as of a date or people paid in a period. Neither is what this asks for.
Explaining large changes. A seasonal swing or a location opening needs a written explanation, which means someone has to know why the number moved - three months after it moved.
Frequently asked questions
Do we have to file if we only have one location in a state?
No. The report exists to split a multi-location employer's state total. One location, nothing to split.
Is the 10-employee threshold company-wide?
No. It's 10 or more employees combined across your secondary locations within a single state.
When is it due?
There's no national deadline. The due date is printed on the form your state issues.
Is it mandatory?
In about 34 states and territories, yes. In Florida and Texas, only for professional employer organisations. In South Carolina, only above 20 employees. Elsewhere BLS describes it as requested.
Does this replace our quarterly contribution report?
No. It supplements it. The totals should match; the MWR breaks them down by worksite.
Which employees do we count each month?
Everyone who worked or received pay during the pay period that includes the 12th of that month, counted once each.
We have locations in eight states. Do we file eight reports?
Effectively yes, unless you file through the BLS EDI Center, which accepts a single file covering all states.
What if a worksite closed mid-quarter?
Note the closure on the form and report employment and wages for the period it operated.
This guide is general information about reporting requirements, not legal advice. Verify current deadlines, thresholds and penalty amounts against the issuing agency before you file.