Employee retention rate is a workforce metric that shows the proportion of employees who remain with an organisation over a defined period. It is useful, but only when the population, period and reason for measuring it are clear.<\/p>\n
A single company-wide percentage can hide important differences between teams, roles, locations and employee groups. Retention should therefore be treated as a diagnostic metric, not a standalone score of organisational health.<\/p>\n
A common formula is:<\/p>\n
Retention rate = employees who remained for the full period \u00f7 employees at the start of the period \u00d7 100<\/strong><\/p>\n For example, if 200 employees were present at the beginning of a year and 170 of those same employees were still employed at the end, the retention rate for that starting cohort would be 85%.<\/p>\n New hires during the period are normally excluded from this particular cohort calculation because the question is how many of the original employees remained.<\/p>\n SHRM describes the same basic cohort-retention calculation: employees who remained for the entire measurement period divided by employees at the start, multiplied by 100. CIPD’s current turnover and retention factsheet also treats retention and turnover as related but distinct workforce measures.<\/p>\n Source: SHRM, calculating employee retention and turnover<\/a><\/p>\n Source: CIPD, Employee turnover and retention, 2026<\/a><\/p>\n Retention measures staying. Turnover measures leaving. The two are related, but organisations should not assume that one is always the exact mathematical inverse of the other because formulas, denominators and populations can differ.<\/p>\n Turnover analysis can also distinguish voluntary departures, involuntary departures, retirement and other exit types.<\/p>\n An 85% organisation-wide retention rate might conceal a team with very stable staffing and another losing critical employees rapidly. Useful analysis therefore segments the data where sample sizes allow.<\/p>\n Common views include:<\/p>\n Small groups require care because individual departures can create large percentage swings and may create privacy concerns.<\/p>\n Voluntary turnover occurs when employees choose to leave. Involuntary turnover includes employer-initiated exits. Combining them can make it harder to diagnose what is happening.<\/p>\n An organisation concerned about retention should usually examine voluntary turnover separately and then investigate the reasons behind those exits.<\/p>\n Some organisations identify regrettable turnover<\/strong>: departures of employees whose skills, performance, relationships or future potential the organisation particularly wanted to retain.<\/p>\n The definition should be documented rather than applied retrospectively to make results look better. It should also not imply that other employees have no value.<\/p>\n Early exits can indicate problems in recruitment expectations, onboarding, job design, manager support or role fit. A cohort view can track employees hired in the same month or quarter and show how many remain after defined intervals.<\/p>\n This is often more informative than blending new hires into a mature workforce population.<\/p>\n A high retention rate is not automatically good. Employees can remain in poorly functioning organisations because external opportunities are limited, while healthy organisations can experience planned turnover.<\/p>\n Combine retention data with evidence such as:<\/p>\n Exit interviews explain some departures after the decision has already been made. Stay interviews can help managers understand what employees value, what creates friction and what might cause them to consider leaving.<\/p>\n Questions can explore meaningful work, manager support, workload, development, recognition, flexibility and obstacles to doing good work. The value comes from acting on recurring themes, not merely collecting answers.<\/p>\n Legacy HR articles often state that replacing an employee always costs a fixed percentage or multiple of salary. Actual cost varies greatly by role and organisation.<\/p>\n A better internal estimate can include recruiting effort, agency or advertising cost, vacancy time, overtime or temporary cover, onboarding, training, manager time and the time required for a new employee to reach expected productivity.<\/p>\n For the broader evidence on why employees stay or leave and practical employer responses, see MATSH’s Employee Retention Strategies guide<\/a>.<\/p>\n A useful dashboard can include:<\/p>\n A single organisation-wide retention rate can hide the very problem management needs to solve. A company may have a healthy overall rate while repeatedly losing scarce engineers, new hires in one location or high-performing people under a specific manager.<\/p>\n After calculating the headline rate, segment the population in ways that are operationally useful. Common views include:<\/p>\n Small populations need caution because one departure can create a dramatic percentage change. Use counts alongside rates and avoid publishing slices so small that privacy is compromised.<\/p>\n Cohort analysis asks what happened to a defined group of employees who started at roughly the same time. This is particularly useful for diagnosing onboarding or early-manager problems.<\/p>\n For example, track a quarterly hiring cohort at 30, 90, 180 and 365 days. If retention is consistently strong at 90 days but drops sharply between six and twelve months, the likely question is no longer basic onboarding. Career clarity, workload, manager quality or role expectations may deserve closer attention.<\/p>\n Cohorts can also be compared by recruitment channel, location, job family or manager, provided the sample sizes are meaningful.<\/p>\n Not every departure is a failure. Retirement, relocation, fixed-term completion and some career moves may be outside the organisation’s realistic control. The useful question is whether the organisation lost someone it wanted to retain for a reason it could reasonably have influenced.<\/p>\n Do not make this classification solely from an exit-interview label. Combine available evidence from manager notes, compensation history, engagement signals, internal mobility, workload, promotion opportunity and the employee’s stated reasons.<\/p>\nRetention rate is not the same as turnover rate<\/h2>\n
Why one retention rate can mislead<\/h2>\n
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Voluntary and involuntary turnover answer different questions<\/h2>\n
What is regrettable turnover?<\/h2>\n
New-hire retention deserves its own view<\/h2>\n
Retention should be interpreted alongside other evidence<\/h2>\n
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Use stay interviews to understand why people remain<\/h2>\n
Do not rely on universal replacement-cost multipliers<\/h2>\n
A practical retention dashboard<\/h2>\n
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Retention rate is only the first diagnostic layer<\/h2>\n
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Use cohort retention to find early lifecycle problems<\/h2>\n
Separate preventable and non-preventable turnover carefully<\/h2>\n
Build a retention-response matrix<\/h2>\n