Donor Retention & Churn Calculator

See how much revenue donor attrition costs you over 1, 3, and 5 years compared with a 5% retention improvement.

Active donorsAverage annual gift ($)Donor acquisition cost ($)Annual retention rate (%)

Year 1

450 donors

at 45% retention

Projected revenue

$45,000

vs $50,000 with +5%

Lost to churn

-$5,000

+ $27,500 replacement cost

Year 3

91 donors

at 45% retention

Projected revenue

$9,113

vs $12,500 with +5%

Lost to churn

-$3,387

+ $15,148 replacement cost

Year 5

18 donors

at 45% retention

Projected revenue

$1,845

vs $3,125 with +5%

Lost to churn

-$1,280

+ $9,815 replacement cost

Stem the churn

Kindora's donor CRM tracks engagement scores and automates re-engagement campaigns, so fewer donors slip away each year.