How the official rate of the rand is set

This page explains, in general terms, how an official or reference rate for a national currency against the US dollar comes about, and how this site uses that rate for the South African rand. It describes the usual practice of central banks without claiming to know the precise procedure of any single institution.

Where an official rate comes from

Central banks publish reference rates in different ways. Some derive the rate from transactions observed in the market over a defined window, then publish a representative central figure. Others fix a schedule and publish an indicative rate at a set moment on working days. Others still publish a central rate around which dealing is allowed to move within a band. The common thread is that the figure is official, methodical and published on a regular basis, rather than being whatever a particular counter offers at a particular moment.

For the rand against the US dollar, the rate this site uses is the official rate of the day as published by the central banks. It is a reference point, not a quote you can trade on.

Buying, selling and central

When you convert currency at a bank or a bureau, you meet a spread. The buying rate is what a dealer pays you for your currency; the selling rate is what a dealer charges you for it. The gap between them is how the dealer covers cost and risk.

It is a single, published midpoint used for reference, accounting and comparison. It is not the price you will be given at a counter, because any dealer applies its own margin to the central figure.

Why the rate is published once a working day

Official rates are published on a fixed schedule, once on working days. Weekends and public holidays are excluded because the interbank market is closed or thin, and a figure struck from sparse trading would not be a fair reference. Publishing once a day also keeps the reference stable and comparable: everyone works from the same figure until the next publication.

This is why the rate is described as the official rate of the day rather than a live price. It does not move minute by minute on this site, and it should not be treated as though it does.

How this site stamps and ages the rate

Each published rate carries the date of the rate, 06.11.2026. The converter shows that stamp so you can see how fresh the figure is.

A rate ages. If the last publication was before a weekend or a public holiday, the figure you see may be a few days old, and market conditions may have moved since. Treat the result as a reference figure, not a dealing price, and check the stamp before relying on it.

• The rate is official and published once on working days.
• The central rate is a midpoint, not a counter price.
• Buying and selling rates include a dealer's margin.
• Weekends and public holidays carry no new publication.
• Always check the date stamp before using a figure.