Definitely have a vesting period, otherwise the person could leave after a couple of months with n% equity having done little to help. Vesting and conditions w

Definitely have a vesting period, otherwise the person could leave after a couple of months with n% equity having done little to help. Vesting and conditions will set the stage for expectations in the business relationship as well as ensure responsibility and accountability. Regarding the actual % split, iron out what needs to be done by both of you and estimate how much effort will be required. Attempt to apply a percentage on this information. Also, note that you can always add more shares to your organization later (dilution applies), so if the situation changes, you create another million shares and revamp the vesting agreements. I think. In other words, get legal advice!