Legal analysis: Whether the online loan will go to jail after the deadline depends on the specific situation. If the online loan is overdue, it will be collected by phone at first. If the borrower refuses to return it after repeated collection, the other party will generally bring a lawsuit to the court; If the borrower is really unable to repay, it will generally not be detained; However, those who refuse to repay the judgment or ruling may be fined or detained by the people's court according to the seriousness of the case.

Legal basis: Article 313 of the Criminal Law of People's Republic of China (PRC), whoever refuses to execute a judgment or ruling that the people's court has the ability to execute, if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or fine; If the circumstances are especially serious, he shall be sentenced to fixed-term imprisonment of not less than three years but not more than seven years and shall also be fined. If a unit commits the crime mentioned in the preceding paragraph, it shall be fined, and the directly responsible person in charge and other directly responsible personnel shall be punished in accordance with the provisions of the preceding paragraph.