A full Catapult capital campaign typically spans several years across its phases: a feasibility study, then 3-6 months of Campaign Planning, then a Quiet Phase of 24-36 months to secure major gifts, followed by the public Campaign Connect phase to reach the broader donor base.
The single biggest driver of timeline is the Quiet Phase, since major gift cultivation and solicitation can't be rushed without damaging the relationships the campaign depends on. Organizations that skip or compress this phase typically fall short of goal or burn out donor relationships they need for future campaigns.