Fee Structure

Sprout's transparent fee model - you only pay on the yield you earn.

Management Fee

Fee Type	Rate
Management Fee	10% of yield

Only Pay on Profits

The management fee is charged only on yield earned, not on your principal. If you don't earn yield, you don't pay fees.

How Fees Are Calculated

Daily Calculation

Fees are calculated daily based on yield earned:

Daily Fee = Daily Yield Delta × 10%

Where Daily Yield Delta = Today's gross yield - Yesterday's gross yield

Example

Day	Vault Value	Principal	Gross Yield	Daily Delta	Daily Fee	Cumulative Fees
1	$10,000	$10,000	$0	$0	$0	$0
2	$10,010	$10,000	$10	$10	$1.00	$1.00
3	$10,025	$10,000	$25	$15	$1.50	$2.50
4	$10,020	$10,000	$20	$0*	$0	$2.50

*Negative yield delta = no fee charged

Fee Accounting

Fees are:

Calculated daily
Recorded in our ledger system
Reflected in your total_yield and withdrawable balance

Fees are NOT separately deducted from your account. They are automatically accounted for in your balance calculations.

What You See in the API

When you call GET /api/1/b2b/balance:

{
  "code": 0,
  "msg": "success",
  "data": {
    "principal": "10000.00",
    "total_yield": "135.00",
    "daily_yield": "1.50",
    "withdrawable": "10135.00"
  }
}

The total_yield field already has fees deducted. For the example above with $10,150 vault value and $10,000 principal: gross yield is $150, fees are $15 (10%), so total_yield = $135.

Field	Calculation
`principal`	deposits - withdrawals
`total_yield`	vault_value - principal - fees (net yield after 10% fee)
`daily_yield`	yield earned since last daily snapshot
`withdrawable`	principal + total_yield

No Hidden Fees

Fee Type	Charged?
Deposit fee	No
Withdrawal fee	No
Account maintenance fee	No
Performance fee	No (included in management fee)
Network/gas fees	No (covered by Sprout)

Fee-Free Scenarios

You pay zero fees when:

Making deposits
Making withdrawals
No yield is generated
Yield is negative (market downturn)

Fee Collection

Fees are collected automatically every 7 days. Sprout transfers the accumulated fees from each partner wallet to the Sprout fee wallet via an on-chain USDC transfer on Base.

How It Works

Fees are calculated daily and tracked in the ledger (cumulative_fees)
Every 7 days, the system calculates uncollected fees: cumulative_fees - fees_collected
If uncollected fees > 0, a USDC transfer is executed from the partner wallet to the Sprout fee wallet
The transfer is recorded as a fee_collection transaction

Fee collection transfers do not affect your principal or withdrawable balance. Fees have already been deducted from your total_yield and withdrawable amounts at the time they are accrued daily.

Custom Fee Rates

Enterprise partners may negotiate custom fee rates. Contact your Sprout representative for details.