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Offerbook charges fees at three stages of a loan’s lifecycle. Fees are set in the onchain configuration and can be updated by protocol admins. The rates described below are the current defaults.

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Fee Structure

1

At loan start — 25% of estimated interest (paid by the borrower)

When a loan is opened (an offer is accepted), the program estimates the total interest for the full 3-day loan term. A fee equal to 25% of that estimated interest is taken immediately, paid in USDC by the borrower.
2

At repayment — 10% of interest (paid by the lender)

When the borrower repays the loan, the borrower pays the full interest to the lender. A fee equal to 10% of the interest is then deducted from the lender’s return.Example: On a 100 USDC loan with 1% interest (1 USDC), the lender receives 0.9 USDC in interest. The remaining 0.1 USDC goes to the protocol.
3

At collateral transfer — 0.1% of collateral (paid by the lender)

If the loan is not repaid after maturity and the lender claims the collateral, a 0.1% fee is deducted from the collateral before it is transferred to the lender.
No fee is charged on collateral transfers involving NFT or RWA collateral.

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Interest on Early Repayment

Borrowers can repay at any time before maturity, but the full interest for the agreed 3-day duration is always owed. There is no partial interest or fee reduction for early repayment.

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Fee Summary

StageWho paysFeeBasis
Loan startBorrower25%Estimated total interest (USDC)
RepaymentLender (deducted from interest received)10%Interest (USDC)
Collateral transferLender (deducted from collateral received)0.1%Collateral value (no fee on NFT/RWA)

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Referral Program

Offerbook offers a referral system where protocol fees can be split into referral rewards. The referral system applies at every stage where a fee is charged (loan start, repayment, collateral transfer).

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Default Fee Split

RecipientShare
Referred user20% of the fee
Referrer30% of the fee
Protocol50% of the fee

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How Referrals Work Across a Loan

The referral benefit applies at each fee stage, and goes to the side that is paying or receiving at that moment:
StageReferred user benefit goes to
Loan start (25% fee)Borrower
Repayment (10% fee)Lender
Collateral transfer (0.1% fee)Lender

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When Both Sides Are Referred

  • If only one side of the loan was referred, that side’s referrer gets the full 30% referrer share.
  • If both sides were referred, the 30% referrer share is split equally between the two referrers (15% each).