> For the complete documentation index, see [llms.txt](https://hummus-exchange.gitbook.io/hummus-exchange/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hummus-exchange.gitbook.io/hummus-exchange/concepts/deposit-fee.md).

# Deposit Fee

Similar to withdrawal arbitrage, “Deposit Arbitrage” is harmful to the protocol’s long term financial health. To counter the attacks, there is a custom deposit fees mechanism.

A very small deposit fee is already sufficient to prevent such an attack.

Assume the deposit amount is equal to 1% of the pool:

| Cov Ratio | Deposit Fee |
| --------- | ----------- |
| <= 1      | -0.0000%    |
| 1.1       | -0.0017%    |
| 1.2       | -0.0012%    |
| 1.3       | -0.0008%    |
| 1.4       | -0.0006%    |