Part of the HR metrics hub — the analytics layer of the hiring funnel. It connects to employer operations for planning and to the staffing layer when you need to bridge a gap.
What it measures
Retention rate looks at the employees present at the start of a period and asks how many of that same group are still employed at the end. It deliberately excludes anyone hired during the period, so it isolates how well you hold on to an existing population.
Because it tracks a fixed starting group, it is well suited to cohort analysis — a team, a hiring class or a tenure band.
Why it matters
Retaining experienced people preserves knowledge, relationships and momentum that are expensive to rebuild. A healthy retention picture reduces hiring load and stabilises capacity.
Watching retention by cohort surfaces where you keep people and where you lose them, which is more actionable than a single blended figure.
Formula
(Employees who stayed ÷ Employees at the start) × 100
Exclude anyone hired during the period — they belong to new-hire retention.
Worked example: Starting with 120 people and keeping 110 of that group gives (110 ÷ 120) × 100 ≈ 91.7% for the period.
Calculate it instantly
Use the free employee retention rate calculator — it runs in your browser, with no signup and nothing stored.
Inputs you need
- The number of employees at the start of the period
- How many of that same group remain at the end
- A defined population (whole org, team or cohort)
- A consistent period length
How to read it
Retention and turnover are related but not exact mirror images — they use different denominators and definitions. Track both rather than assuming one implies the other.
Cohort retention is usually more useful than an organisation-wide number; it shows where the staying happens.
Common mistakes
- Including people hired during the period in the "stayed" count.
- Comparing different period lengths.
- Assuming retention is exactly 100% minus turnover.
- Reporting a number without naming the group and period.
Operational considerations
- Define the starting population and period before you measure, then keep them fixed.
- Segment by cohort to find where retention is strong or weak.
- Read retention with new-hire retention to separate early and longer-tenure dynamics.
- Use it to focus retention efforts, not as a stand-alone scorecard.
Use this metric inside the operating cadence: plan with workforce planning and headcount planning, anticipate demand with hiring forecasting, and check it against workforce capacity planning.
Free, printable planning resources
Plan, screen and onboard consistently as you measure. No signup, no gating.