What it means
Every note and coin in your wallet was at some point issued by a central bank, and the running total of everything issued and not yet returned or destroyed is what economists call currency in circulation. It is a liability of the central bank, which is why banknotes historically carried a promise to pay the bearer.
In accounting terms the central bank's balance sheet records those notes as an amount owed, not as an asset. The figure matters because it is a clean, hard number in a monetary system that is otherwise mostly electronic.
Central banks watch it because sharp changes signal shifts in how much people trust banks, how large the cash economy is, or how nervous households have become. Analysts usually distinguish currency in circulation from currency held by the public.
The first includes cash sitting in commercial bank vaults and cash machines; the second strips that out to show what households and businesses are actually holding. Currency in circulation tends to grow slowly with nominal economic activity, but it spikes during crises.
A banking scare, a natural disaster or a period of very low interest rates all push people to hold physical cash, because the cost of doing so, in the form of forgone interest, falls close to zero. The common misreading is to treat the figure as a measure of inflation risk on its own.
Cash is a small slice of total money, and in most developed economies it represents something in the region of 5% to 10% of annual output, so bank lending and deposits matter far more to the broader money supply.
In practice
Real-world examples.
Example
A central bank's weekly statistics show currency in circulation jumping 9% in the fortnight after two regional banks fail. Officials read it as a deposit confidence problem rather than a spending boom, and step up liquidity support to the banking system.
Example
A retail chain's cash management team notices that the national currency in circulation figure spikes every December and falls back by late January. It uses the same seasonal pattern to plan armoured van collections and till float levels across 400 stores.
Example
An economist comparing two neighbouring countries finds currency in circulation is 4% of GDP in one and 14% in the other. The gap points to a much larger informal, cash-based economy in the second country rather than to any difference in monetary policy.
Formula
Calculation
Currency in circulation = total notes and coins issued by the central bank - notes and coins held in central bank vaults
Currency held by the public = currency in circulation - vault cash held by commercial banks
Worked example: a central bank has $520 billion of notes and coins on issue, measured net of everything it has withdrawn and destroyed over the years. Of that total, $30 billion is sitting unissued in its own vaults, so currency in circulation is $520 billion - $30 billion = $490 billion.
Commercial banks hold $40 billion of that cash in their branch vaults and cash machines. Currency held by the public is therefore $490 billion - $40 billion = $450 billion. If nominal GDP for the year is $9,000 billion, then currency in circulation equals $490 billion / $9,000 billion, or about 5.4% of GDP, a ratio central banks track over time to see whether cash use is rising or falling.Case study
Seen in the real world.
Meridian Republic is a fictional country used here purely as an illustrative example of how currency in circulation behaves under stress. For a decade its central bank reported notes and coins in circulation growing at roughly the same pace as nominal output, sitting steadily near 6% of GDP, and nobody paid the number much attention.
Then a mid-sized commercial lender suspended withdrawals after a bad property loan book came to light. Within three weeks currency in circulation rose by the equivalent of $22 billion as households drained accounts and stuffed cash into home safes, pushing the ratio close to 8% of GDP. Cash machines in several regions ran dry, not because there was no money but because logistics could not keep up with demand.
The central bank responded by publishing daily circulation data, guaranteeing deposits up to a set limit and flying additional notes to regional distribution centres. Circulation drifted back towards its old trend over the following six months, and the episode became an internal case study in treating currency in circulation as an early warning indicator of confidence rather than as a dull statistical footnote.
Watch out
Common mistakes.
- Confusing currency in circulation with the total money supply, when bank deposits are many times larger than physical cash in most modern economies.
- Assuming cash in commercial bank vaults is excluded, when the headline circulation figure normally includes it and only the narrower public holdings measure strips it out.
- Reading a rise in circulation as automatically inflationary, when it often reflects hoarding for safety, which is the opposite of money being spent.
Questions
People also ask.
Is currency in circulation an asset or a liability of the central bank?
It is a liability, recorded on the central bank's balance sheet as an obligation to the holder of the note.
Why does the figure keep rising even as card payments grow?
Large denomination notes are increasingly held as a store of value rather than for transactions, so demand for cash to hold can rise while cash used for shopping falls.
Does currency in circulation include money held abroad?
Yes for widely used currencies, and a substantial share of some countries' notes circulates outside their borders, which is one reason the ratio to domestic GDP can look unusually high.
From the founder's library
Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%