Islamic construction finance relies mainly on Istisna, a contract to order an asset that still has to be manufactured or built, often combined with a parallel Istisna signed with the contractor and a forward Ijara, without any interest-bearing loan.
Why Istisna sits at the heart of site financing
Istisna allows the sale of something that does not yet exist: a building, factory or warehouse defined by drawings and a detailed specification. Unlike an ordinary sale, the price can be paid in instalments and delivery takes place at a later agreed date.
The two-contract structure involving the contractor
The bank signs an Istisna with the client, who orders the works from it, and then a parallel Istisna with a construction company. Both contracts remain legally independent: the bank answers to its client for defects even if the builder fails to deliver.
What margin separates the two prices?
The price paid by the client exceeds the amount paid to the contractor, and that difference rewards the bank for the construction risk it carries. The price is fixed at signing and cannot rise with the passage of time, which rules out interest.
Variation orders and rising material costs
When the client asks for design changes, a variation agreement can adjust the price by mutual consent. A mere increase in material costs, however, normally stays with the seller, unless exceptional circumstances arise that the Sharia board assesses case by case.
Paying in step with progress on site
Drawdowns usually follow milestones such as foundations, structural works, weatherproofing and finishing. Each payment to the contractor is triggered by a progress certificate, often issued by an independent engineer, so that money always matches work that has genuinely been completed.
Leasing a building before it is finished
Another route is to sign at the outset a lease over a building that is described but not yet complete. Rent may be collected in advance as a deposit, yet it is only earned once the asset is delivered and placed at the tenant's disposal.
Moving from Istisna during works to a lease afterwards
On large projects, the bank acquires the asset through Istisna during construction and then leases it to the client under Ijara Muntahia Bittamlik once completed. The client pays spread-out rentals and becomes owner at the end through a separate undertaking.
Late delivery and penalty clauses
A penalty clause for delay is generally accepted in Istisna because it sanctions failure to perform a building obligation rather than a money debt. It must appear in the contract and stay reasonable, and its amount is deducted from the price owed to the builder.
Risks the bank carries until handover
Until the works are delivered, the bank bears real risks: contractor default, defective workmanship, overruns and destruction of the site. This transfer of risk separates Islamic financing from a conventional developer loan, where the lender only keeps credit risk.
Performance bonds and Takaful cover
To contain these risks, the bank requires performance bonds and retention amounts from the builder, along with contractors' all-risk Takaful cover. Such protections are allowed as long as they do not end up guaranteeing the financier a fixed return.
How this differs from a property Murabaha
Murabaha requires the asset to exist and be owned by the bank before it is resold at a margin. For a plot awaiting development it cannot pay for the works, so only Istisna, forward Ijara or a development Musharaka finance the building itself.
Points to clear before signing the works contract
Before committing, check the technical description of the works, the payment schedule, how liability is allocated if something goes wrong, the treatment of variations and the written opinion of the financier's Sharia board, the only body able to confirm compliance.
Specialist external source
The AAOIFI Shariah Standards set out the rules for Istisna and parallel Istisna, as well as for Ijara on an asset that is still under construction.