Islamic Contract – Bay’ al-Istisnā‘: Legality of Istisnā‘

​Islamic Contract – Bay’ al-Istisnā‘: Legality of Istisnā‘
Q1: What is the legal basis for the permissibility of istisnā‘?
Answer:
According to Muslim jurists, the legality of the istisnā‘ contract is established through various Islamic legal sources, including:

• the Sunnah;
• ijmā‘ (consensus);
• qiyās (analogy); and
• istihsān (juristic preference).

These sources collectively support the permissibility of istisnā‘ as a valid Islamic commercial contract.


Q2: What evidence from the Sunnah supports the legality of istisnā‘?
Answer:
The legality of istisnā‘ is supported by a narration reported by Nāfi‘:
“Abdullāh ibn ‘Umar reported that Prophet Muhammad (SAW) requested that a ring be manufactured for him.”
(Ahmad, 2001, hadith no. 12360)
This hadith demonstrates that:

• the Prophet (SAW) requested the manufacture of an item according to specifications; and
• the manufactured item was to be produced in the future.

Jurists regard this narration as a clear basis for the permissibility of istisnā‘ contracts in Islam.


Q3: How does ijmā‘ support the legality of istisnā‘?
Answer:
According to Hanafi jurists, istisnā‘ is also legitimised through:
ijmā‘ (consensus of Muslim jurists).
They argue that:

• people have continuously practised istisnā‘ transactions throughout different periods of Islamic history;
• scholars did not object to this widespread commercial practice.

This continuous acceptance and practice constitute implied consensus regarding the permissibility of istisnā‘.


Q4: What is the role of qiyās and istihsān in legitimising istisnā‘?
Answer:
Qiyās (Analogy)
Jurists use analogy to compare istisnā‘ with other recognised sale contracts involving future delivery and specified assets.
Istihsān (Juristic Preference)
Hanafi jurists particularly rely on istihsān because:

• strict analogy may initially disallow selling something not yet in existence;
• however, commercial necessity and public interest justify allowing istisnā‘.

Thus, istisnā‘ is permitted to facilitate:

• manufacturing;
• construction; and
• economic activities essential for society.

Case Study 1: Manufacturing of Custom Furniture
A hotel owner contracts a furniture manufacturer to produce 200 customised chairs.
Contract Details

• Total contract price: RM80,000
• Manufacturing period: 4 months
• Specifications:
  • wood type;
  • dimensions;
  • colour;
  • design.

Analysis

• The chairs do not yet exist at the time of contract.
• The manufacturer agrees to produce them according to specifications.
• The transaction reflects the essence of istisnā‘.
• Its permissibility is supported by the Sunnah and customary commercial practice.

This is a valid istisnā‘ contract.


Case Study 2: Construction of a Commercial Building
A company appoints a contractor to construct a warehouse under an istisnā‘ arrangement.
Contract Details

• Construction price: RM2,500,000
• Completion period: 24 months
• Payment schedule:
  • RM500,000 upfront;
  • RM1,000,000 during construction;
  • RM1,000,000 upon completion.

Analysis

• The building will be constructed in the future.
• Specifications and delivery timeline are predetermined.
• Payment arrangement is flexible.
• The contract reflects established customary practice accepted by Muslim jurists.

This arrangement is permissible under Islamic law through:

• Sunnah;
• ijmā‘;
• qiyās; and
• istihsān.

Notes: Legal Basis of Istisnā‘
Sunnah

• Prophet Muhammad (SAW) requested manufactured items.
• Hadith supports permissibility of manufacturing contracts.

Ijmā‘

• Continuous practice of istisnā‘ accepted by Muslim jurists.
• No significant objection from scholars historically.

Qiyās

• Analogy with other valid commercial contracts.

Istihsān

• Juristic preference based on commercial necessity and public interest.

Important Principle
Istisnā‘ is permitted because it facilitates:

• trade;
• manufacturing;
• infrastructure development; and
• societal economic needs within Shariah principles.