Employee retention rate

How do you calculate retention rate?

Take the number of employees present at the start of the period who are still employed at the end, divide by the starting headcount, and multiply by 100. Note the difference from turnover's denominator: retention tracks a fixed starting cohort, so new hires who join and leave within the period do not affect it. That makes retention and turnover complementary rather than redundant; the two can move in different directions in a high-growth business.

Why cohort retention beats the headline number

The most informative version is retention by hire cohort: of the people who joined in a given quarter, how many are still here at 90 days, at one year, at two? First-year retention is effectively a verdict on recruitment and onboarding quality, while later drop-offs point at management, development and pay. One curve tells you where the leak is.

What drives retention?

The evidence keeps landing on the same levers: the quality of the immediate manager, genuine development and progression, fair pay, and fit between the person and how the team actually works. Counter-offers and retention bonuses buy months; the structural levers buy years. Measuring engagement and fit continuously is how you find which lever matters in your case, before the resignation letter does it for you.