In general, plan to allocate about 10% of your overall project budget to KM.
Depending on the resources available to you, you may have to start small and plan for scale over time as you obtain additional resources. Typical KM activities require budgeting some level of effort for a monitoring and evaluation specialist, technical writer, editor, communications staff, graphic designer, ICT specialist and/or vendor, event coordinator, and a KM project manager. You will also need to factor in other related costs, such as printing, meeting venues, travel, and transportation.
Learn more about the budget considerations for a KM strategy.