I charge $20 an hour for grant writing. This also includes any research for possible funding sources. I do not accept a percentage of the grant or a commission. I am, however, willing to work with a project total. My services start with a contract and a clear set of payment milestones (e.g., after research is completed and a list of possible grants is compiled or after a proposal is finished). In the event that your project is not funded, I am not obligated to refund your money; grant seeking is competitive and I cannot guarantee that a project will be funded.
In addition to research and proposal writing, my services also include concept papers and any other written materials that may be needed for an application. Your organization also receives a copy of the grant proposal for your records.