A bill rate error rarely stays on one shift. Staffing systems often reuse a rate by client, job, worker group, or location.
Where the wrong rate starts
Common causes include an old contract rate, the wrong location, a missed rate increase, or a worker linked to the wrong job.
Check the rate before it repeats
Compare each shift to the current client, job, and location rate. Then check overtime and shift premiums separately. One clear exception is easier to fix than hundreds of wrong invoice lines.