Riba and cash
What is the difference between profit and interest?
A plain-English explanation of profit (return from business) and interest (a guaranteed payment).
The short answer
Profit is a share of business results tied to risk and performance; interest is a fixed contractual payment on borrowed money. In many Islamic approaches, interest (riba) is prohibited because it is detached from risk-sharing.
Profit: return from risk and activity
Profit comes from business activity or investment performance. If you provide capital and the business does well, you share in the upside; if it does poorly, you share the downside. This connection between risk and reward is a key concept in Islamic finance.
Examples of profit include dividends from company earnings or a share of the proceeds in a partnership. The payment is linked to actual results rather than a fixed contract.
Interest (riba): a fixed contractual return
Interest is a pre-agreed payment for borrowing money, usually expressed as a percentage. It is due regardless of the borrower’s profit or loss. Many Islamic scholars define riba as an unjustified or predetermined increase on loans, which is why interest-based lending is generally prohibited.
Because interest is not tied to business risk, Islamic finance avoids it in favour of trade, leasing and profit-sharing structures. The practical treatment of particular instruments depends on documentation and contract form.
What this means in practice
- 1Read a product’s contract to see whether returns are fixed (interest-like) or linked to business performance.
- 2Ask providers how returns are generated: profit-sharing, mark-up sales, lease rentals or contractual interest.
- 3Compare the structure to AAOIFI's tests if the product relates to shares or debt.
- 4If treating a product as compliant matters to you, request the Shariah board’s rationale or fatwa.
- 5Seek qualified financial and religious advice when the line between profit and interest is unclear.