XRPL Hooks fees consist of three components: execution fees charged per WebAssembly instruction, deployment fees for SetHook transactions, and emitted transaction fees for Hooks that trigger automatic transfers. Unlike Ethereum gas fees, XRPL Hook fees are deterministic and predictable.

Hooks fees are typically a few drops per transaction — fractions of a penny — making XRPL smart contracts among the most cost-efficient on any public blockchain. The non-Turing-complete design ensures fees never spike unpredictably.

Deploying a Hook requires a SetHook transaction. The deployment fee is determined by the size of the Hook code, the size of the parameters attached, and whether the operation is a fresh create or an install of an existing Hook onto a new account.

Create operations (first deployment) cost more than install operations (deploying an existing Hook to a new account). Developers can reduce deployment fees by writing compact WebAssembly and minimizing parameter payloads.

When a Hook automatically triggers a new transaction — such as sending a percentage of an incoming payment to another account — that emitted transaction incurs an additional fee managed through the sfEmitBurden mechanism.

The sfEmitBurden uses an exponential multiplier to prevent chains of emitted transactions from exhausting ledger resources. For common use cases like auto-savings Hooks, emitted transaction fees remain minimal.