For a group plan, the insurer looks at the team’s size, ages, genders, nationalities, jobs and industry, the benefits requested and, for larger groups, the claims history.
Small teams are usually offered an insurer’s package rates, with health declarations in some cases. Larger teams are priced more on their own profile and claims experience.
Underwriting is why a calculator can give only an estimate. The final premium and terms are set by the insurer after it has seen your team’s details.