Class code error. Senior care employers use multiple class codes across clinical, dietary, housekeeping, maintenance and administrative work, and premium follows the code. Misallocated payroll produces a premium that is wrong in one direction or the other, and it is discovered at audit rather than at binding.
The audit itself. Premium is estimated at inception and trued up afterwards against actual payroll. An operator that grew census through the year receives an audit bill nobody budgeted for, and one that shrank frequently never asks for the return it is owed.
Experience modifier arithmetic that nobody checks. The mod is calculated from data reported by carriers to a rating bureau, and reporting errors happen. A closed claim still carrying an open reserve, a claim assigned to the wrong entity, or a payroll figure entered wrong all inflate the mod, and the mod multiplies everything.
Employers liability left at the statutory minimum. It costs very little to raise and it is the part that responds where the exclusive remedy does not.
The gap between comp and liability on a resident assault. A staff injury is comp. The same incident may also produce a professional liability question about whether the resident should have been retained, or a claim by another resident. Two policies, two carriers, one set of facts, and no coordination unless someone arranges it.
Ignoring the second-injury and scheduled-credit conversations. Underwriters have discretion to apply credits for documented safety programs, and an operator who presents a real one gets a better answer than one who does not present at all.