Median annual gross dollar churn was 8%, 7%, 6% and 8% in 2016, 2015, 2014 and 2013

As with unit churn, companies with longer contracts (2+ years) tend to report lower annual dollar churn. Companies with shorter contracts (under 2 years) saw increased dollar churn compared to last year; contracts 2 years or longer were relatively consistent with prior survey results.

By definition, non-renewal rates are higher than gross dollar churn rates. However, it is interesting to see that the non-renewal rates are also higher for shorter duration contracts.