The core four
Time to hire
How long it takes from posting a job to an accepted offer.
Applicant to interview ratio
How many applicants it takes to find someone worth interviewing. A low ratio can point to a posting or screening problem.
Offer acceptance rate
How often offers are accepted. A low rate often points to pay, process speed, or candidate experience.
Early retention, 30 to 90 days
Whether new hires stay past the first few months, which reflects hiring quality as much as onboarding.