What is the ruling of Islamic law on abandoning a job after completing more than 65% of it in exchange for 50% of the wage, given the hardship endured in the work, and is compensation owed to the employer?

Summary:

The employment contract must be fulfilled unless there is an excuse, because employment (ijarah) is a binding contract.

Some jurists have allowed the annulment of an employment contract due to a sudden excuse, such as the employee being unable to complete the work except by suffering harm. So, if you are unable to complete the work and would suffer clear harm by continuing it, then seek release from the employer. If he refuses, then there is no blame upon you for annulling the contract.

In the case of annulment due to an excuse, if there is a penalty clause, you are obligated to pay it. If there isn't, then the details are as follows:

- If the agreement was to develop the application for a specific amount: you are not entitled to anything for the work you have done previously, and the ruler (or judge) shall hire someone from your wealth to complete the work.

- If the agreement was for monthly work for a fixed period: you are only entitled to the wage for the period you have worked.

- If the agreement was for a monthly wage for an unfixed period: you may terminate the contract at the end of the month.