Skip to main content
Riba refers to interest or usury—any guaranteed, predetermined return on a loan or investment regardless of the outcome. It is one of the most fundamental prohibitions in Islamic finance.

​
Beginner

​
What It Means

Riba literally translates to “increase” or “excess” in Arabic. In Islamic finance, it refers to any guaranteed return on money lent, which is prohibited because money should not generate more money without productive economic activity or risk-sharing.

​
Practical Example

A conventional bank account paying 4% annual interest is considered riba. The return is guaranteed regardless of what the bank does with your money. In contrast, profit-sharing arrangements where returns depend on actual business performance are permissible.

​
Why It Matters

Riba is prohibited because it:
  • Creates unearned income without productive activity
  • Shifts all risk to the borrower while the lender is guaranteed returns
  • Can lead to exploitation, particularly of those in financial distress
  • Encourages speculation over productive investment
For investors, this means avoiding companies with excessive interest-bearing debt or those whose primary business involves conventional lending.

​
Advanced

​
Types of Riba

Islamic jurisprudence distinguishes two main categories:
TypeDescriptionExample
Riba al-NasiahInterest on loans—excess payment for deferment of repaymentBank charging 10% annual interest on a loan
Riba al-FadlExcess in exchange of similar commoditiesTrading 1kg of gold for 1.1kg of gold

​
Shariah Screening Thresholds

For equity investments, companies are typically screened for riba exposure: 
Interest-bearing debt / Total assets < 30%
Interest income / Total revenue < 5%
These thresholds recognize that most companies have some unavoidable interest exposure while limiting it to immaterial levels.

​
Alternatives to Interest-Based Financing

Islamic finance has developed several riba-free alternatives:
  • Murabaha: Cost-plus financing where the financier purchases an asset and sells it at a disclosed markup
  • Ijara: Lease-to-own arrangements
  • Musharakah: Equity partnership with profit/loss sharing
  • Sukuk: Islamic bonds structured around tangible assets

​
Historical Context

The prohibition of riba appears in the Quran and was elaborated in hadith literature. Similar prohibitions existed in medieval Christian and Jewish law. The modern Islamic finance industry, beginning in the 1970s, has developed practical frameworks for riba-free banking and investment.
Interest income received inadvertently (e.g., from cash holdings at a broker) must be purified through charitable donation. This doesn’t make the activity permissible but addresses unavoidable exposure.

​
Related Terms

Purification

Cleansing non-compliant income

Shariah

Islamic law framework

Halal Investing

Permissible investments