Interest on central bank reserves is neither a tax nor a market price - OMFIF

The interest a central bank pays on commercial bank reserves is often mischaracterised, according to OMFIF. It is neither a tax on banks nor a market-determined price. Instead, it is an administered policy rate — a tool central banks use to steer short-term interest rates and manage liquidity in the banking system. Because it is set by policy decision rather than by trading, it should not be read as a signal of market clearing levels.

The distinction matters for how markets interpret central bank actions. Moves in the reserve rate can be about maintaining the policy stance or adjusting the floor of the rate corridor, not about taxing the banking sector or reflecting supply and demand. Treating it as a market price can lead to misreading the intent behind policy decisions and mispricing expectations for short-term funding costs.

For observers, the practical takeaway is to watch the policy rationale communicated alongside any change to reserve remuneration, and how it interacts with other tools such as open market operations. Understanding the reserve rate as an administered instrument helps separate technical liquidity management from broader signals about the monetary stance.