Yes, the unfinished online loan may affect the sale of the house. In the case of mortgaged houses, it is necessary to settle the mortgage before resale. In addition, if you have a credit record, you generally need to settle these debts in order to sell the house smoothly.

The reason for this is the following：

1. Bank mortgage loan: If the house is purchased by mortgage and there is an outstanding mortgage, the bank will hold the mortgage. When reselling the house, the bank will ask to settle the remaining mortgage before transferring the house.

2. Credit history: Unpaid online loans will be submitted to personal credit reporting agencies, forming a bad credit record. Potential buyers or financial institutions will check the credit report when buying a house or providing loans. Having a bad credit record may affect the seller's reputation and reduce the chance of selling a house.

In order to sell the house smoothly, it is suggested to settle all outstanding online loans and mortgages first to ensure a good credit record. If there are difficulties, you can negotiate with relevant financial institutions to formulate repayment plans to avoid adverse effects on the sale of houses.