Live From AFP: 7 Great Reasons to Add Monthly Giving to Your Fundraising

"That's the power of monthly donors. It's not a one-off gift," McKinnon said.

Monthly giving is predictable
Since monthly donors tend to stay on for a long time and give consistently every month, it's predictable income. On top of that, you tend to unearth the attrition in the first year or two to adjust your projections and strategies accordingly.