> ## Documentation Index
> Fetch the complete documentation index at: https://t3sa.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Fees

> How TESA charges for API usage: a percentage of the yield, never of the principal

<Warning>
  Draft: specification in progress. Endpoints and fields may change.
</Warning>

API usage has no monthly fee and no setup fee. TESA charges a percentage of the yield generated, the same model as the dashboard.

| Plan | Fee on yield |
| - | - |
| Standard | 5% |
| Enterprise | Below 5%, negotiable by volume |

<Check>
  The fee applies only to the yield, never to the principal. A period with no yield is not charged.
</Check>

## Illustrative example

| Item | Amount |
| - | - |
| Yielding balance for the month | 842,110.00 USDC |
| Gross yield for the month | 3,578.97 USDC |
| TESA fee (5%) | 178.95 USDC |
| Net yield | 3,400.02 USDC |

## Partner costs

Costs charged by third parties are outside the TESA fee and follow each partner's rules: network fees (gas) on Ethereum and Solana, any fees from the company's custodian and management fees embedded in the USDY and BUIDL assets themselves.

## In the API

The plan percentage appears in `taxa_sobre_rendimento` in `GET /organizacao`. The yield for each period, with the fee and the net amount, comes from `GET /rendimento`, and issued charges from `GET /cobrancas`. The `cobranca.emitida` event notifies you when a new charge is issued.

See also [Pricing](/docs/en/operacao/preco).