🔁 Volunteer Retention Rate Calculator

Track how many of your volunteers from a prior period returned in the current one — a key metric for volunteer program health.

Returning volunteers this period

Total volunteers last period

What the percentage measures

Retention looks backwards at one specific group: the people who were on your roster last period and are still with you now.

retention = returning volunteers / prior period total × 100
churn     = 100 - retention
lost      = prior period total - returning

The defaults - 45 of last year's 60 volunteers back again - give 75.0% retention, 25.0% churn and 15 people who did not return. Add 12 first-timers to the returning box by mistake and the reading jumps to 95.0%, which measures recruitment, not loyalty. The denominator is fixed at last period's roster, so new arrivals never belong in the top of the fraction.

Counting the two numbers consistently

Set a bar for "active" and keep it. One logged shift, or a minimum number of hours - either works, but a definition that loosens between periods produces a flattering trend that is pure measurement drift.
Match the period lengths. Twelve months against twelve. A short current window will always look like a collapse, because people who volunteer twice a year have not had their turn yet.
Split your cohorts. One-day event volunteers and people in weekly rostered roles behave completely differently; averaging them hides both. Run the calculator once per group.
A rate over 100% is impossible for a true cohort - recheck the numerator.

There is no sector-wide pass mark, and published benchmarks mostly compare programmes that are not alike. Your own figure last year, split by role, is a far better comparison than a national average.

Frequently asked questions

How do I calculate volunteer retention rate?

Divide the number of last period's volunteers who came back by the total on last period's roster, then multiply by 100. 45 returners from a roster of 60 is 75%.

Do new volunteers count towards retention?

No. Someone who joined this period had no chance to leave, so including them inflates the rate. Count them separately as recruitment, and they will appear in next period's denominator.

What is a good volunteer retention rate?

It depends on the commitment you ask for. Programmes with regular rostered roles often hold most of their people; annual events and one-off days routinely lose more than half without anything being wrong. Track your own trend by role rather than chasing a headline number.