Benchmark context
The blog page gives you one percentage. This tool compares that number against a blended benchmark by company size and industry, so the result is easier to explain.
Expanded employee retention planner
Retention rate calculator
A stronger version of the blog calculator: benchmark your retention, reconcile your headcount data, estimate attrition cost, and model how many employees and dollars you can save with a small retention lift.
- Adjusted and simple formulas
- Annualized retention for monthly or quarterly snapshots
- Company-size and industry benchmarks
- Cost-of-attrition scenario planner
- Executive summary you can copy
A more useful calculator than the blog version
Start with Standard mode for the same formula as the blog calculator. Switch to Advanced when you want benchmark context, data checks, cost impact, and scenario planning.
Inputs
Standard mode mirrors the blog calculator. Advanced mode unlocks extra fields and a deeper retention readout.
Standard mode uses the same formula as the blog calculator: (end headcount - new hires) / start headcount × 100.
Replacement cost assumption
Used only in Advanced mode to estimate the backfill cost per exit as a percent of annual
salary.
This estimates the cost of backfilling each exit, including recruiter time, manager time, lost
productivity, and ramp time.
Scenario planner: improve retention by
Advanced mode models the upside of improving retention by a few points using your current
salary and replacement-cost assumptions.
Use this to model what a small lift from better onboarding, manager routines, or stay interviews
could be worth.
Retention rate The blog-style retention formula subtracts new hires from the ending headcount before dividing by the starting headcount.
83.0%
Needs attentionStandard formula: (186 - 20) / 200 × 100 = 83.0%.
Formula used
In Standard mode this matches the blog calculator exactly: (end headcount - new hires) /
start headcount × 100.
93.0%
Annualized retention
This projects a monthly or quarterly retention snapshot to a 12-month view so it can be
compared with annual benchmarks.
47.4%
Employees retained
Calculated as end headcount minus new hires during the same period.
166
End headcount minus new hires
Formula used
(186 - 20) / 200 × 100 = 83.0%
Same method as the blog calculator, just shown live as you type.
Employees retained
166
End headcount minus new hires
Turnover rate
Advanced mode calculates turnover from reported exits when available, or reconstructs exits
from the headcount bridge if needed.
7.0%
Based on reported exits
Net growth
-7.0%
Ending headcount versus starting headcount
Attrition cost at risk
Estimated as exits × average salary × replacement-cost factor. This is directional planning
data, not finance-booked cost.
$682.5K
14 reported exits x salary x replacement factor
Benchmark comparison
Blended benchmark for Mid-market + SaaS / Tech
60%
75%
90%
100%
Your annualized retention is 38.1 points below the low end of the blended benchmark. For a growth team, the first audit should be onboarding and manager routines.
Data quality checks
What to do next
Scenario upside
Executive summary
What this page adds on top of the blog calculator
Cost-of-attrition impact
You can estimate the dollar value of exits using a replacement-cost assumption instead of treating retention as a purely academic KPI.
Scenario planning
Model what a small lift in retention could save in headcount and replacement cost. This is useful when you are trying to justify onboarding or manager enablement work.
Annualized retention
Monthly and quarterly snapshots become more useful when you annualize them and compare them to year-level targets instead of judging a partial period in isolation.
Data sanity checks
The calculator reconciles starting headcount, hires, exits, and ending headcount, so you can catch reporting gaps before sharing the number upward.
Copy-ready summary
Instead of manually rewriting the result, you get a clean management summary with the metric, gap to benchmark, and a concrete next-step angle.
Quick methodology notes
Adjusted formula
The calculator uses the recommended retention formula from the blog as its anchor: (ending headcount - new hires) / starting headcount x 100 . That makes the result more honest when hiring masks churn.
Annualized view
If you are reviewing a month or quarter, the annualized retention estimate helps compare a short snapshot with annual benchmarks. It is directional, not a guaranteed forecast.
Not ERC
This page is about employee retention in the HR sense. It does not address the Employee Retention Credit or tax-credit topics.
Need the full retention playbook?
Pair this calculator with the detailed blog guide to benchmarks, formulas, and retention strategy ideas, or book a demo to see how HarmonyHR tracks retention by team and manager automatically.