This varies drastically depending on the prior experience of the organization and the type of proposal. Remember, the proposal is one of the last steps in the project planning stage. If an organization already has all the background information prepared, taking that information and turning it into a proposal may take only a few days. On the other hand, creating a project and a proposal from the very beginning or creating a proposal for highly technical donors such as USAID or the European Commission could potentially take months of work. Fortunately, many donors understand the difficulty involved in writing a full proposal and so often require only a short concept note in the first instance.