Pricing: what to expect.
Emplicity quotes per client, as PEPM or a percentage of payroll, and does not publish a rate. The inputs are headcount, states, workers' compensation class codes and the benefits census. California payroll has its own cost drivers, so ask for the quote on both bases and for the workers' compensation class rates separately; a restaurant group and a professional services firm will see very different splits.
The medical line is where the Vensure acquisition should show up. A 300-client PEO on its own has little master medical leverage; as a Vensure division, Emplicity can draw on larger carrier relationships. Ask which master plan and which carriers your quote is written on, request the plan-by-plan rate table at your census, and compare it against a national PEO's California offering. Kaiser versus PPO is the usual California question and the table should answer it.
Contracts are annual in the normal course. Confirm notice and exit terms in the client service agreement, and given the acquisition, add a service-continuity question: who your service team is and what happens if that changes.