- There's a difference between sharing co-writing copyright credit and sharing revenues. Only someone who has materially contributed to the writing of the composition is entitled to copyright co-ownership. On the other hand, you're free to share your songwriting revenues with anyone.
- A lot depends on how you structure the music publishing. We can't go into the gruesome details here but you can learn more about music publishing (and see examples of royalty splits for a band) in our Music Law book (or check out Randy Wixen's The Plain and Simple Guide to Music Publishing).
- There are no fixed rules for dividing songwriting revenue.