What is riba (interest)?

“Allāh has permitted trade and forbidden riba (usury).”
— Qur’ān, al-Baqarah 2:275

What is riba?

Riba means interest or usury — a guaranteed increase in money on a loan or debt, without shared business risk.

In Islamic finance, riba is prohibited because it is understood as unjust, exploitative, and harmful to society — especially to people who are already in need.

Simple definition

Riba is when you lend money and expect more money back just for lending — not because you shared real economic risk or effort in a venture.

Example (not allowed)

You lend a friend ₦100,000 and ask for ₦120,000 in two months.

• The extra ₦20,000 is riba.
• It is ḥarām here because it is a fixed profit with no shared risk on the loan.

Why riba is prohibited (summary)

1. Unjust gain — the lender profits without bearing proportionate risk or effort.
2. Harms the poor — repayment plus a fixed “extra” increases the burden.
3. Inequality — wealth can compound through guaranteed claims on others’ labour.
4. Mercy in society — lending framed as help should not turn into guaranteed extraction.

Types of riba (basic overview)

1. Riba al-nasīʾah (riba on loans)
   The most common form today: bank loans, payday loans, typical credit-card interest structures.

2. Riba al-faḍl (riba in exchange)
   Unfair excess when exchanging similar commodities (classical fiqh examples; less central to everyday investing notes).

This note focuses on money/debt riba, because that is what clashes most often with “normal” investing products.

Key point

Not all profit is riba.

• Allowed (in principle): profit from trade or investment where there is real risk and no guaranteed return on money as debt.
• Not allowed: a fixed, guaranteed return on money lent, independent of whether the borrower’s venture actually profits.

Halal (allowed)	Riba (not allowed)
Investing in a business (risk of loss)	Charging interest on loans
Buying shares (no guaranteed payout)	Fixed return on pure debt
Profit with shared risk	Profit without risk on money lent

In the next piece in this series: halal investment vs riba, with Nigerian examples like Sukuk and platforms.