Banknote denominations across most of the world repeat a one, two, five progression across each power of ten. The usual explanation is that few designs then cover a wide range of values and the combinations become familiar to anybody handling cash; it is a workable convention rather than a proven optimum, and a binary set would need fewer notes per payment. Myanmar departed from it. The Central Bank of Myanmar's own record shows a 75 kyat note issued on 11 November 1985, a 35 kyat note on 1 August 1986, the 25, 35 and 75 kyat notes withdrawn from circulation on 5 September 1987, and 45 and 90 kyat notes issued seventeen days later on 22 September 1987.
Look at the notes in any wallet, anywhere, and the numbers are nearly always the same handful: five, ten, twenty, fifty, a hundred. That is not an accident, though the reason is more modest than it is usually given credit for. One country departed from the pattern far enough to show what the pattern is worth.
Key Takeaways
- The familiar one, two, five progression covers a wide range of values with few designs, and its real strength is familiarity rather than mathematical optimality.
- Myanmar issued notes of 35, 45, 75 and 90 kyat, numbers almost no other series has used, alongside an ordinary 25.
- The central bank's own chronology carries the dates: 75 kyat in November 1985, 35 kyat in August 1986, 45 and 90 kyat in September 1987.
- It also records the 25, 35 and 75 kyat notes being withdrawn on 5 September 1987, seventeen days before the 45 and 90 appeared.
- The bank states what was issued and when, and gives no reason for any of the numbers.
What the one, two, five progression is for
Covering a wide range of values with very few designs.
A denomination set is a small design problem. Given a range of everyday prices, which values should the notes take so that most amounts can be assembled quickly, and so that change can be given without counting out a stack?
The answer most countries converged on repeats one, two and five across each power of ten: 1, 2, 5, 10, 20, 50, 100 and upwards. Each step is roughly double or two and a half times the last, so a handful of designs spans several orders of magnitude.
It is worth resisting the stronger version of that claim. This is not the set that minimises how many notes a payment takes, because a doubling series would do better on that measure alone. What the one, two, five set has is a good balance between the number of designs and the ease of assembling ordinary amounts, and then the thing that matters more than either: nearly everyone uses it, so the combinations are familiar to every hand that handles cash.
The value of it is easiest to see by breaking it. If a series offers 35 and 75 but not 50, then paying 100 needs combinations no cashier's hand is used to, and every transaction requires a little more arithmetic than it otherwise would. Cash handling is a habit, and habits work by pattern.
What Myanmar actually issued
A series that ignores the pattern almost completely, and the issuing bank keeps the record.
The Central Bank of Myanmar publishes a history of its banknotes, and it is unusually detailed about dates. Reading it in order gives the following.
| Denomination | Date issued or withdrawn | What the bank records |
|---|---|---|
| 25 kyat | 30 September 1972 | Issued when the People's Bank was renamed the Union of Burma Bank |
| 100 kyat | 17 April 1976 | Issued |
| 50 kyat | 30 April 1979 | Issued |
| 75 kyat | 11 November 1985 | Issued |
| 20, 50 and 100 kyat | 3 November 1985 | Earlier issues demonetised |
| 35 kyat | 1 August 1986 | Issued |
| 25, 35 and 75 kyat | 5 September 1987 | Withdrawn from circulation |
| 45 and 90 kyat | 22 September 1987 | Issued |
One of those, the 25, is unremarkable: many countries issue a 25 and it sits comfortably beside the 20 and 50. The 35, 45, 75 and 90 are the ones with almost no parallel anywhere.
Set out that way, two further things stand out that a list of denominations alone would not show.
The first is the sequence. A 75 kyat note was issued in November 1985 and withdrawn in September 1987, so it existed for less than two years. A 35 kyat note was issued in August 1986 and withdrawn thirteen months later.
The second is the gap between the last two rows. The notes that replaced the withdrawn ones were issued seventeen days after the withdrawal. Whatever else can be said about the episode, the replacement was ready.
What the withdrawal did
It removed most of the country's money at once.
The Peterson Institute for International Economics, in its case study on Burma, records the September 1987 demonetisation as having rendered 60 to 80 per cent of money in circulation worthless, and as having triggered the first protest demonstrations in more than a decade.
That range is worth reading as a range. Two decimal points of precision are not available for an event of this kind in a country of that period, and the source gives a band rather than a figure. What the band establishes is the scale: this was not the retirement of a large-value note that most people rarely held. It was most of the cash in the country.
None of it touches how the unit is quoted against another one, which is a separate question covered in how to read a currency pair. The kyat's later history is the ordinary one. The central bank's record shows the post-1988 series returning to conventional numbers, with notes of 1, 5, 10, 20, 50, 100, 200, 500 and 1,000 kyat, and larger denominations arriving as they became necessary: 5,000 kyat on 1 October 2009, which the bank says was to make handling easier for the people, and 10,000 kyat from 15 June 2012.
That last progression is what a denomination set normally records. Higher notes appear when the lower ones stop being convenient, and the numbers stay on the pattern.
Why those numbers, and where the record stops
The issuing authority does not say, and this is where a guide should stop.
The central bank's published history states what was issued and on what date, and offers no reason for any denomination. Explanations circulate widely, most commonly one involving the numerological preferences of the head of state of the period, and the arithmetic they rest on is easy to check. This guide does not assert them, because the institution with the records does not.
What can be said from the record alone is enough. The numbers departed from the pattern every other series uses, they were introduced and withdrawn within months of each other, and the replacement notes were ready seventeen days after the withdrawal. A denomination set is normally the most stable thing about a currency, changing only when prices have moved enough to make it inconvenient. This one moved for a reason that was not about prices.
What that leaves for a reader today
A currency whose note series is now unremarkable and whose recent history is not.
The kyat in circulation today runs on ordinary denominations. For anyone converting from Australia, the Australian dollar to kyat pair is governed by the country's current exchange rules rather than by any of this, and those are a separate subject. The value of the episode is what it shows about denominations generally: they look arbitrary, they are not, and the cost of getting them wrong is paid by everybody who handles cash.
Where to look next
who is allowed to print a pound covers who may issue notes rather than what is printed on them, and what has to exist for a currency to cross a border covers where they can be used. For the live figures, see the AUD to MMK page.
Sources
Central Bank of Myanmar, History of Bank Notes - the 25 kyat note issued 30 September 1972, the 100 kyat on 17 April 1976, the 50 kyat on 30 April 1979, the 75 kyat on 11 November 1985, the demonetisation of earlier 20, 50 and 100 kyat issues on 3 November 1985, the 35 kyat on 1 August 1986, the withdrawal of the 25, 35 and 75 kyat notes on 5 September 1987, the 45 and 90 kyat notes issued on 22 September 1987, the post-1988 denominations of 1 to 1,000 kyat, the 5,000 kyat note of 1 October 2009 issued to make handling easier, and the 10,000 kyat note from 15 June 2012
Peterson Institute for International Economics, Case 88-1: US and Others v. Burma (Myanmar) - the September 1987 demonetisation rendering 60 to 80 per cent of money in circulation worthless and triggering the first protest demonstrations in more than a decade
Central Bank of Myanmar, Series of Bank Notes and Coins - the Bank's own catalogue of the issued series with denominations and issue dates
General information about banknote denominations and currency design. Not financial advice, and not a recommendation of any product or institution. Reviewed by the Tradergy editorial team, September 2026.
Common questions
Why are banknotes usually 1, 2, 5, 10, 20, 50 and so on?
Because each step is roughly two or two and a half times the last, so a small number of designs spans a wide range of values and most everyday amounts can be assembled without a long stack. It is worth being careful about the stronger claim sometimes made for it: the set is not the one that minimises notes per payment, since a doubling series would need fewer. What it has is coverage with few designs, and the familiarity that comes from almost everybody using the same numbers.
What denominations did Myanmar use?
Four of them appear in almost no other series. The Central Bank of Myanmar's own history of its banknotes records the Union of Burma Bank issuing a 75 kyat note on 11 November 1985 and a 35 kyat note on 1 August 1986, and a 45 kyat note and a 90 kyat note on 22 September 1987. A 25 kyat note had been issued on 30 September 1972, and 25 is an ordinary denomination used in many countries.
What happened on 5 September 1987?
The central bank's record states that the 25, 35 and 75 kyat notes were withdrawn from circulation on that date. The Peterson Institute for International Economics, in its case study on Burma, records the September 1987 demonetisation as having rendered 60 to 80 per cent of money in circulation worthless and as having triggered the first protest demonstrations in more than a decade.
How quickly were they replaced?
Seventeen days. On the central bank's own chronology the 25, 35 and 75 kyat notes came out of circulation on 5 September 1987 and the 45 and 90 kyat notes were issued on 22 September 1987. Whatever else the replacement was, it was not unplanned.
Why were those particular numbers chosen?
The central bank's published history states what was issued and when, and does not give a reason for any of the denominations. Explanations circulate, most commonly one involving the numerological preferences of the head of state at the time, but they are not part of the issuing authority's own record and this guide does not assert them. What can be said from the record is that the numbers do not follow the pattern the rest of the series and the rest of the world used.