Open almost any lease, loan agreement or settlement and the money appears twice: Two hundred fifty thousand dollars ($250,000.00). Everyday writing does not do this. The U.S. Government Publishing Office Style Manual says a spelled out number should not be repeated in figures, and then makes one exception: legal documents [1]. The reason is protection against error. A figure is easy to misread, mistype or alter, while a string of words is hard to change without leaving a trace. For checks and other negotiable instruments the Uniform Commercial Code goes further and says that when words and numbers conflict, the words prevail [2]. A contract is not a check, so that section does not decide a contract dispute, but it shows why drafters trust the words and treat the figure as a reading aid.
The format drafters use
Write the amount in words first, then the figure in parentheses right after it. The Style Manual gives the accepted patterns: five (5) dollars, not five dollars (5), and ten dollars ($10), not ten ($10) dollars [1]. In other words, the parentheses follow the number itself. If the figure carries a dollar sign, it comes after the word dollars; if it is a bare number, it comes right after the spelled out number and before the unit. Capitalizing the first word is common in contracts but is house style, not a rule.
Spelling the words
A large number is spelled in groups from the biggest unit down: billions, then millions, then thousands, then whatever is left. There is no "and" inside a whole number. The Style Manual's own examples are one thousand eight hundred fifty and one hundred fifty-two thousand three hundred five [1]. Compound numbers from twenty-one through ninety-nine take a hyphen, and a group that is zero is simply skipped. Here are amounts produced by the Everyday Tools numbers to words converter, with the exact wording it returns.
- $250,000.00:
two hundred fifty thousand dollars - $1,500,000.00:
one million five hundred thousand dollars - $2,048,000.00:
two million forty-eight thousand dollars - $3,000,250.00:
three million two hundred fifty dollars(there is no "zero thousand") - $12,345,678.90:
twelve million three hundred forty-five thousand six hundred seventy-eight dollars and ninety cents - $1,000,000,000.00:
one billion dollars
Where the word "and" belongs
The one place "and" appears is between a whole number and a fraction of it. The Style Manual's examples are sixty-two dollars and four cents and ninety-nine and three-tenths degrees [1]. So $1,250.75 is one thousand two hundred fifty dollars and seventy-five cents, and 105 is one hundred five, not "one hundred and five". If a contract needs a percentage with a fraction, write it the same way: two and one half percent (2.5%). The converter's plain words mode reads decimals digit by digit, so 2.5 comes back as two point five; that is correct for reading a number aloud but not the form a lawyer expects, so spell fractions yourself.
Million, billion, trillion and beyond
American English uses the short scale: a thousand thousands is a million, a thousand millions is a billion, a thousand billions is a trillion, then quadrillion and quintillion. In ordinary text the Style Manual prefers the compact form for round amounts, changing $12,000,000 to $12 million, but it leaves an amount like $2,700,000 as figures rather than converting it to $2.7 million [1]. A contract should not use the compact form at all. Spell every group: 12,345,678,901 is twelve billion three hundred forty-five million six hundred seventy-eight thousand nine hundred one. The converter spells numbers up to 21 digits exactly, so one quintillion for 1,000,000,000,000,000,000 is not a problem, and it never rounds.
Numbers that are not money
Deadlines, quantities and terms follow the same pattern: fifteen (15) business days, thirty (30) days' written notice, one hundred (100) units. Outside legal documents, both the Style Manual and the National Archives style guide spell out numbers under 10, use figures for 10 and above, and spell out any number that starts a sentence [1][3]. Inside a contract, consistency matters more than the threshold: pick one treatment for the document and apply it to every number that could matter in a dispute.
Keep the two versions in agreement
Writing an amount twice creates a new way to get it wrong. The most common slip is editing the figure during negotiation and leaving the words from the last draft, so a document ends up saying Two hundred fifty thousand dollars ($275,000.00). Treat the pair as a single item: whenever one changes, change the other in the same edit, and in the final read through check every figure against its words. Generating the words from the figure, instead of typing them, removes most of the risk.
Let the tool do the spelling
Open the Everyday Tools numbers to words converter and type the figure in Number to convert; commas and a dollar sign are fine. Under Write it as, choose Check amount (and 50/100 dollars) for money: the result shows the check line, the figure, and an In full version such as seven million five hundred thousand dollars and fifty cents, with a Copy check wording button. Choose Plain words (12.5 is twelve point five) for counts and other whole numbers. Press Convert to words, paste the words into the document, and add the figure in parentheses yourself. Every example on this page came from that tool.
Sources
- U.S. Government Publishing Office Style Manual (2016), Chapter 12, Numerals (rules 12.4, 12.16, 12.18, 12.20, 12.23, 12.24)
- Uniform Commercial Code § 3-114, Contradictory Terms of Instrument (Legal Information Institute, Cornell Law School)
- NARA Writing Style Guide, section 1.9 Numbers (National Archives and Records Administration)