Is zakat obligatory on a car purchased from the bank in installments and used for work, and how is zakat determined and when is it due, if obligatory?

If the car was not purchased with the intention of trade, then there is no zakat on it because it is not a trade commodity. This is based on the hadith: "There is no sadaqah (zakat) on a Muslim for his slave or his horse." Zakat becomes obligatory on income from work if it reaches the nisab and a full year has passed over it. The nisab is equivalent to 85 grams of gold or 595 grams of silver, and its rate is 2.5%. Regarding installments, it is permissible to deduct debt from the zakatable wealth if the remainder does not fall below the nisab, provided there are no other surplus funds that can be used to pay off the debt. Otherwise, the debt is not deducted, and all the wealth is subject to zakat.