Answer:
الجـواب حامـدا ومصليـا
If you have invested in a flour mill, zakāt is not due on the amount invested in non-zakātable fixed assets such as machinery, buildings, or land. However:
1. Zakāt is due on any zakātable inventory (e.g., wheat or flour) at its market value when one lunar year is completed, after deducting business-related costs and liabilities.
2. Zakāt is also due on the profits or returns received. These should be added to your other wealth, and if the total reaches the niṣāb threshold and is held for one lunar year, zakāt is payable on it.
In summary, no zakāt is due on fixed assets, but zakāt applies to zakātable stock and profits after costs and liabilities, provided the total wealth meets or exceeds niṣāb.
And Allah knows best.
Issued by: Mawlana Hamoon Masudi
Approved by: Mufti Manzoor Ahmad
References:
1. Mukhtaṣar al-Qudūrī
2. Al-Hidāyah by Al-Marghīnānī
3. Fatāwā al-Hindiyyah
4. Al-Mabsūṭ by Al-Sarakhsī
5. Radd al-Muḥtār by Ibn ʿĀbidīn