The mill (
American English
American English, sometimes called United States English or U.S. English, is the set of variety (linguistics), varieties of the English language native to the United States. English is the Languages of the United States, most widely spoken lang ...
) or mil (
Commonwealth English
The use of the English language in current and former Member states of the Commonwealth of Nations, countries of Commonwealth of Nations, the Commonwealth was largely inherited from British Empire, British colonisation, with some exceptions. Eng ...
, except
Canada
Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...
) is a unit of
currency
A currency is a standardization of money in any form, in use or circulation as a medium of exchange, for example banknotes and coins. A more general definition is that a currency is a ''system of money'' in common use within a specific envi ...
, used in several countries as one-thousandth of the base unit. It is symbolized as ₥ ().
In the United States, it is a notional unit equivalent to a thousandth of a
United States dollar
The United States dollar (Currency symbol, symbol: Dollar sign, $; ISO 4217, currency code: USD) is the official currency of the United States and International use of the U.S. dollar, several other countries. The Coinage Act of 1792 introdu ...
(a hundredth of a
dime or a tenth of a
cent). In the United Kingdom, it was proposed during the decades of discussion on
decimalisation
Decimalisation or decimalization (see American and British English spelling differences, spelling differences) is the conversion of a system of currency or of weights and measures to units related by Power of 10, powers of 10.
Most countries have ...
as a division of the
pound sterling
Sterling (symbol: £; currency code: GBP) is the currency of the United Kingdom and nine of its associated territories. The pound is the main unit of sterling, and the word '' pound'' is also used to refer to the British currency general ...
. While this system was never adopted in the United Kingdom, the currencies of some British or formerly British territories did adopt it, such as the
Palestine pound and the
Maltese lira.
The term comes from the
Latin
Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...
"millesimum", meaning "thousandth part".
Usage
United States

In the United States, the term was first used by the
Continental Congress
The Continental Congress was a series of legislature, legislative bodies, with some executive function, for the Thirteen Colonies of British America, Great Britain in North America, and the newly declared United States before, during, and after ...
in 1786, being described as the "lowest money of account, of which 1000 shall be equal to the federal dollar".
The
Coinage Act of 1792 describes milles and other subdivisions of the dollar:
The US Mint in Philadelphia made
half cents worth 5 mills each from 1793 to 1857.
Tokens in this denomination were issued by some states and local governments (and by some private interests) for such uses as payment of
sales tax
A sales tax is a tax paid to a governing body for the sales of certain goods and services. Usually laws allow the seller to collect funds for the tax from the consumer at the point of purchase. When a tax on goods or services is paid to a govern ...
.
These were of inexpensive materials such as
tin,
aluminium
Aluminium (or aluminum in North American English) is a chemical element; it has chemical symbol, symbol Al and atomic number 13. It has a density lower than that of other common metals, about one-third that of steel. Aluminium has ...
,
plastic
Plastics are a wide range of synthetic polymers, synthetic or Semisynthesis, semisynthetic materials composed primarily of Polymer, polymers. Their defining characteristic, Plasticity (physics), plasticity, allows them to be Injection moulding ...
or
paper
Paper is a thin sheet material produced by mechanically or chemically processing cellulose fibres derived from wood, Textile, rags, poaceae, grasses, Feces#Other uses, herbivore dung, or other vegetable sources in water. Once the water is dra ...
. Rising
inflation
In economics, inflation is an increase in the average price of goods and services in terms of money. This increase is measured using a price index, typically a consumer price index (CPI). When the general price level rises, each unit of curre ...
depreciated the value of these tokens in relation to the value of their constituent materials; this depreciation led to their eventual abandonment. Virtually none were made after the 1960s.
Today, most Americans would refer to fractions of a cent rather than mills, a term that is widely unknown. For example, a gasoline price of $3.019 per gallon, if pronounced in full, would be "three dollars
ndone and nine-tenths cents" or "three
zero-one-nine dollars". Discount coupons, such as those for grocery items, usually include in their fine print a statement such as "Cash value less than of 1 cent". There are also common occurrences of "half-cent" discounts on goods bought in quantity. However, the term "mill" is still used when discussing billing in the electric power industry
The electric power industry covers the generation, transmission, distribution and sale of electric power to the general public and industry. The commercial distribution of electric power started in 1882 when electricity was produced for elec ...
as shorthand for the lengthier " of a dollar per kilowatt hour". The term is also commonly used when discussing stock prices, the issuance of the founder's stock of a company, and cigarette tax
Tobacco smoking is the practice of burning tobacco and ingesting the resulting tobacco smoke, smoke. The smoke may be inhaled, as is done with cigarettes, or released from the mouth, as is generally done with Tobacco pipe, pipes and cigars. The ...
es.
Property tax
Property tax
A property tax (whose rate is expressed as a percentage or per mille, also called ''millage'') is an ad valorem tax on the value of a property.In the OECD classification scheme, tax on property includes "taxes on immovable property or Wealth t ...
es are also expressed in terms of mills per dollar assessed (a mill levy
A property tax (whose rate is expressed as a percentage or per mille, also called ''millage'') is an ad valorem tax on the value of a property.In the OECD classification scheme, tax on property includes "taxes on immovable property or net ...
, known more widely in the US as a "mill rate
A property tax (whose rate is expressed as a percentage or per mille, also called ''millage'') is an ad valorem tax on the value of a property.In the OECD classification scheme, tax on property includes "taxes on immovable property or net we ...
"). For instance, with a millage rate of 2.8₥, a house with an assessment of would be taxed , or . The term is often spelled "mil" when used in this context.
With respect to property taxes, a "mil" is also slang for one million
1,000,000 (one million), or one thousand thousand, is the natural number following 999,999 and preceding 1,000,001. The word is derived from the early Italian ''millione'' (''milione'' in modern Italian), from ''mille'', "thousand", plus the ...
units of currency, especially as a rate expressed per mille
The phrase per mille () indicates parts per thousand. The associated symbol is , similar to a per cent sign but with an extra zero in the division (mathematics), divisor.
Major dictionaries do not agree on the spelling, giving other options o ...
"‰", as one million
1,000,000 (one million), or one thousand thousand, is the natural number following 999,999 and preceding 1,000,001. The word is derived from the early Italian ''millione'' (''milione'' in modern Italian), from ''mille'', "thousand", plus the ...
units of currency per milliard on the long scale of numeration, that is, 1,000,000 per 1,000,000,000 currency units of assessed valuation on all private property throughout the "mill yard" or property tax levy district.
Finance
The term mill is often used in finance
Finance refers to monetary resources and to the study and Academic discipline, discipline of money, currency, assets and Liability (financial accounting), liabilities. As a subject of study, is a field of Business administration, Business Admin ...
, particularly in conjunction with equity market microstructure. For example, a broker that charges 5 mils per share is taking in $5 every 1000 shares traded. Additionally, in finance the term is sometimes spelled "mil". Cf. basis point
A basis point (often abbreviated as bp, often pronounced as "bip" or "beep") is one hundredth of 1 percentage point. Changes of interest rates are often stated in basis points. For example, if an existing interest rate of 10 percent is increased ...
.
Some exchanges allow prices to be accounted in ten-thousandths of a dollar ($29.4125 = 29,412.5₥ for example). This last digit is sometimes called a "decimill" or "deci-mill", but no exchange officially recognizes the term.
Fiction
Mark Twain
Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), known by the pen name Mark Twain, was an American writer, humorist, and essayist. He was praised as the "greatest humorist the United States has produced," with William Fau ...
introduced a fictional elaboration of the mill in his 1889 novel '' A Connecticut Yankee in King Arthur's Court''. When Hank Morgan, the American time traveler, introduces decimal currency to Arthurian Britain, he has it denominated in cents, mills, and "milrays", or tenths of a mill (the name perhaps suggested by " myriad", meaning ten thousand or by the Portuguese and Brazilian milreis).
Canada
In Canada, the mill rate system is fundamental for calculating property taxes at the municipal level, reflecting the amount of tax per $1,000 of assessed property value. Municipalities determine annual mill rates based on budget needs for public services like education, infrastructure, healthcare, and law enforcement.
This calculation helps standardize property taxes while allowing flexibility to address specific financial needs in each locality. Mill rates are subject to adjustment annually or periodically, depending on factors like government spending requirements, economic conditions, and shifts in property valuations, providing a fair and balanced approach to local tax funding.
For example, if a property is valued at $100,000 and the mill rate is set at 50, the tax due would be calculated as: 100,000 × (50 / 1000) = 5,000. This straightforward calculation offers transparency for taxpayers and aids municipalities in consistent revenue collection.
United Kingdom
Proposed on several occasions as a means of decimalising sterling under the "pound and mil" system suggested in 1855 by Sir William Brown MP, the mil was occasionally used in accounting
Accounting, also known as accountancy, is the process of recording and processing information about economic entity, economic entities, such as businesses and corporations. Accounting measures the results of an organization's economic activit ...
.
The 1862 report from the '' Select committee on Weights and Measures'' noted that the Equitable Insurance Company had been keeping accounts in mils (rather than in shillings and pence) for such purposes for over 100 years. Such a unit of a thousandth of a pound would have also been similar in value to the smallest coin in circulation, the farthing (worth of a pound).
By the time British currency was decimalised in 1971, the farthing had been demonetised eleven years prior, in part due to having its value eroded by inflation; thus, the mil was no longer necessary.
Malta
The Maltese lira was decimalised in 1972 on the "pound and mil" system. The coinage included denominations of 2 mils, 3 mils, and 5 mils from 1972 to 1994, with 10 mils being equal to one cent. While prices could still be marked using mils until 2008, when the country switched to the euro
The euro (currency symbol, symbol: euro sign, €; ISO 4217, currency code: EUR) is the official currency of 20 of the Member state of the European Union, member states of the European Union. This group of states is officially known as the ...
, in practice these were rounded off for accounting purposes.
Mandatory Palestine, Israel, Jordan
The Palestine pound, used as the currency of the British Mandate for Palestine from 1927 to 1948, was divided into 1,000 mils. Its successor currencies, the Israeli lira and the Jordanian dinar retained the division, respectively named the '' pruta'' and '' fils''. The Israeli pruta lasted until 1960, and the Jordanian fils until 1992, and in Supermarket prices and taxi meters well into the 21st century.
Hong Kong
Between 1863 and 1866 the one mil coin was the lowest denomination issued by the British government in Hong Kong
Hong Kong)., Legally Hong Kong, China in international treaties and organizations. is a special administrative region of China. With 7.5 million residents in a territory, Hong Kong is the fourth most densely populated region in the wor ...
; it was eliminated due to its unpopularity.[Ma Tak Wo 2004, Illustrated Catalogue of Hong Kong Currency, Ma Tak Wo Numismatic Co., LTD. Kowloon, Hong Kong.]
Cyprus
The Cypriot pound was decimalised using the "pound and mil" system in 1955 and lasting until 1983. However, coins smaller than 5 mils ceased being used in the mid 1960s. When switched to cents in 1983, a ½-cent coin was struck that was abolished a few years later.
Tunisia
Coins are minted in 10, 20, 50, and 100 ''millimes'', thousandths of a Tunisian dinar. Older coins of 5 ''millimes'' remain in circulation.
Related units
*The Egyptian pound
The Egyptian pound ( ; abbreviations: £, E£, £E, LE, or EGP in Latin alphabet, Latin, and in Arabic script, Arabic, ISO 4217, ISO code: EGP) is the official currency of Egypt. It is divided into 100 piastres, (or qirsh, ; ''plural'' ; abb ...
is divided into 1,000 ''milliemes'', 10 milliemes equal 1 piastre (25 piastres is the smallest currently-minted coin).
*The Tunisian dinar is divided into 1,000 ''millimes'' (10 millimes is the smallest currently-minted coin).
*The Kuwaiti dinar, Bahraini dinar, Jordanian dinar, and Iraqi dinar are divided into 1,000 '' fils''. The smallest coins currently minted are 5 fils (Kuwait and Bahrain), 1/4 dinar (Jordan), 25 dinars (Iraq).
*The Omani rial is divided into 1,000 '' baisa''.
*The Libyan dinar has been divided into 1,000 ''dirham
The dirham, dirhem or drahm is a unit of currency and of mass. It is the name of the currencies of Moroccan dirham, Morocco, the United Arab Emirates dirham, United Arab Emirates and Armenian dram, Armenia, and is the name of a currency subdivisi ...
s'' since 1971.
*The Japanese yen
The is the official currency of Japan. It is the third-most traded currency in the foreign exchange market, after the United States dollar and the euro. It is also widely used as a third reserve currency after the US dollar and the euro.
Th ...
was formerly divided into 1,000 ''rin''. An early proposed (but not accepted) design for the 1-rin coin used "1 mil" in the Romanized text.
Notes
References
{{DEFAULTSORT:Mill (Currency)
Numismatics
Currency symbols
fr:Millime