> For the complete documentation index, see [llms.txt](https://gum-ball.gitbook.io/gumball-protocol/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gum-ball.gitbook.io/gumball-protocol/core-concepts/revenue-structure.md).

# Fee Structure

Each buy and sell on the bonding curve incurs swap fees for that specific collection. Each swap from gNFT to collection key in the GumBall Machine also incurs a fee. 

Fees are set by creators for each collection. 

Bonding Curve swap fees can be set from 2.5-10%

GumBall Machine fees can be set from 0-10%

Each collection's fees accumulate in their respective Fee Treasury over time as swaps/redemptions occur. A skim function can be called by anyone at any time to transfer the tokens in the treasury to their appropriate addresses.

Fee Treasury Split is

* 40% to the collection creator
* 40% to stakers
* 20% to GumBall Treasury

Royalties from third party marketplaces such as Opensea are distributed to the collection creator as well. 


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