# Claim Gas costs
You can check your gas expenses and claim reimbursement from the Investment Pool in the Pool dashboard.
Claiming gas cost reimbursement
### Checking gas expenses and setting gas computation parameters
Gas Expenses are accounted in the 'Pool Admin' panel. The parameters used to compute these expenses can be seen and modified by clicking on 'Gas Cost Values'
Gas Cost Parameters
Gas Cost computation depends on three parameters:
* **The Base Gas Cost**: The minimum gas cost of any transaction, by default 21'000
* **The Call Data Gas Cost**: The gas cost for a non-zero byte of calldata, by default 16
* **SStore Gas Cost**: the gas cost of the SSTORE operation, by default 5'000
These Values can be changed if the caller has the *FLAG\_GASCOST\_UPDATE* privilege.
### Claiming Gas Reimbursement
You can claim gas expense reimbursement with the 'Claim Gas Compensation' button. Note that you must have the FLAG\_GAS\_REIMBURSEMENT privilege to do so and that gas expense accounting is done individually for each administrator (you can not claim the expenses of another user).
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