What is the ruling on entering into government tenders in which bonds are delivered that are due in installments over a period of 10 years, and is it permissible to finance a contractor through an Islamic Murabaha system and obtain bonds that are due within 10 years?

Bonds are usurious loans forbidden [in Islam], so it is not permissible to implement a project or finance a contractor in exchange for bonds, due to their inclusion of a usurious loan contract. It is also not permissible to deal in them under the pretense that they are Murabahah (cost-plus financing) or investment. Legitimate Murabahah is when the seller sells a commodity for the same price he bought it for, plus a known profit margin.

You can enter into a partnership or Mudarabah (profit-sharing) with the contractor: - Partnership (Shirakah): Each party contributes capital, and they share profits and losses according to their respective capital contributions. - Mudarabah: You provide the capital and he undertakes the work, and the profit is shared between you according to an agreement, while the loss is borne solely by your capital.

All of this is conditional upon the transaction being free from dealing in forbidden bonds.