R-e-n-e-w-a-l

An expire-based renewal system seeks to do the same, except the timing of the renewal effort is based on the anniversary of that individual’s first contribution.

There are pros and cons for each type of system. Expire systems take the donors’ giving habits into better consideration and allow the organization to spread income throughout the year. But expire renewal systems also are much more expensive, for mailings are scattered across the year; as a result the quantities of each mailing often are small — driving up production costs.