Is a fixed interest rate more halal than a floating one?
This is one of the most common misunderstandings in Islamic finance, and the answer is short: no. Riba is an increase paid on money advanced in exchange for time, and whether that increase is calculated at a rate that stays the same or one that moves with a benchmark does not touch the definition. A fixed rate is more predictable, which genuinely helps you plan - but predictability is a budgeting advantage, not a Shariah one. The confusion usually comes from a real principle applied to the wrong thing: Islamic law does require that a price be known and fixed at contracting, and a floating rate means you cannot state what you will ultimately pay. That is a second, separate objection to floating-rate borrowing. It does not make fixed-rate borrowing permissible; it makes floating-rate borrowing objectionable on two counts rather than one.