Membership fee based on custom field

Question

Seeking advice on the best practice way to implement membership fees based on the custom field which contains organisation income. i.e. Membership fee would be 1% of income for type 'A' contact.

I understand custom development is likely to be involved, so would it be best to create a module & which hooks or classes to override? Something that is maintainable through releases without constant code changes would be good.

Answer 1

Take a look at the membershipTypeValues hook and implement that in an extension.