1, the overdue fine is calculated as follows:

(1) If the liquidated damages for overdue payment agreed by both parties are lower than the loan interest loss caused by payment default, the seller may request the court to increase the liquidated damages for overdue payment to the loan interest loss caused by payment default;

(2) The liquidated damages for overdue payment agreed by both parties are excessively higher than the loan interest loss caused by default payment;

(3) If the liquidated damages for overdue payment agreed by both parties are equivalent to the interest loss of the loan in arrears, in this case, the actual interest loss should be taken as the calculation standard of liquidated damages for overdue payment.

2. Legal basis: Article 585 of the Civil Code of People's Republic of China (PRC).

The parties may agree that when one party breaches the contract, it shall pay a certain amount of liquidated damages to the other party according to the situation of breach of contract, and may also agree on the calculation method of the amount of compensation for breach of contract.

If the agreed liquidated damages are lower than the losses caused, the people's court or arbitration institution may increase the liquidated damages at the request of the parties; If the agreed liquidated damages are excessively higher than the losses caused, the people's court or arbitration institution may appropriately reduce them at the request of the parties.

If the parties concerned pay liquidated damages for delayed performance, the breaching party shall also perform the debt after paying the liquidated damages.

Second, how to negotiate repayment for overdue online loans?

After the online loan is overdue, the borrower needs to take the initiative to call the financial institution and then negotiate according to his overdue situation. You can take the initiative to contact customer service to negotiate repayment before the deadline, give a grace period or reduce interest, and you can make several phone calls. After loans overdue, we should first contact the loan platform. In order to reduce overdue interest and repayment cost, borrowers need to negotiate with the platform to reach a repayment agreement as soon as possible. When negotiating repayment, you must be sincere. Explain that your arrears are not intentional and show your willingness to repay. It should be noted that when negotiating repayment with the online lending platform, you must be reasonable, pay attention to ways and means, and never ask for it blindly.