To write a USD amount in words on a check, spell out the dollars, write the word “and” as the divider, then write the cents as a two-digit number over 100. For example, $1,234.56 becomes “One thousand two hundred thirty-four and 56/100.” The written line carries more legal weight than the digits in the box, so the words are the version that actually pays.
The Basic Format
Read the dollar figure left to right and spell it the way you’d say it aloud, with one important exception: do not use the word “and” anywhere inside the dollar portion. In financial writing, “and” has a single job, and that is marking the break between dollars and cents. Keeping it out of the dollar words prevents any question about whether you meant a decimal point.
After the dollars, write “and,” then the cents as a numerator over 100. Pad single-digit cents with a leading zero so the fraction always has two digits on top. A few examples:
- $45.00: Forty-five and 00/100
- $108.75: One hundred eight and 75/100
- $2,319.04: Two thousand three hundred nineteen and 04/100
- $15,750.50: Fifteen thousand seven hundred fifty and 50/100
You could spell cents out in words (“sixty-two cents”), but banks and businesses almost never do. The fraction is faster, fits the space on the written line, and is harder to alter.
Hyphenate Compound Numbers
Every compound number from twenty-one through ninety-nine takes a hyphen. Forty-five, sixty-three, and ninety-nine all get one. Twelve, twenty, and one hundred do not. The hyphen glues two words into a single value so a reader cannot mistake them for two separate numbers.
The rule holds wherever the compound number appears. In $5,487.00, you write “Five thousand four hundred eighty-seven and 00/100.” The hyphen stays on eighty-seven even though it is buried inside a larger figure.
Even Dollar Amounts
When there are no cents, you still need to close out the line so no one can add words after yours. The standard move is to write “and 00/100” after the dollars. “And no/100” and “and xx/100” are also acceptable. So $450.00 becomes “Four hundred fifty and 00/100.” Then draw a horizontal line from the end of your writing to the printed word “Dollars” at the edge of the field. That line is a physical barrier against anyone squeezing in extra words.
Larger Amounts
For thousands, millions, and higher, break the number into groups the way you’d read it aloud. Each group gets its denomination (thousand, million, billion), and the whole thing flows together without commas:
- $75,000.00: Seventy-five thousand and 00/100
- $1,250,000.00: One million two hundred fifty thousand and 00/100
- $3,400,210.89: Three million four hundred thousand two hundred ten and 89/100
Do not insert commas between groups in the written version. “One thousand two hundred fifty” is correct; “One thousand, two hundred fifty” is not. Commas belong only in the numerical version.
The costliest mistake on large amounts is dropping a denomination. Writing “One hundred fifty thousand” when you meant “One million one hundred fifty thousand” loses a zero’s worth of money. Walk through the numeral group by group and confirm each denomination label made it into the words.
Common Mistakes to Avoid
- Using “and” inside the dollar portion. “Five hundred and fifty” reads as $500.50, not $550.00. Save “and” for the cents break.
- Dropping hyphens on compound numbers. “Forty five” looks like two numbers. “Forty-five” is one.
- Putting commas in the written amount. The word version runs as one continuous phrase.
- Leaving blank space after the amount. An open line after “Three hundred” invites “thousand.” Fill the rest of the line.
- Letting the written and numerical amounts disagree. The written version controls, so a careless mismatch means the bank pays the wrong figure.
Why the Written Amount Controls
If a check shows “$500” in the box but “Five thousand” on the line, the bank pays five thousand. Under the Uniform Commercial Code, when an instrument contains contradictory terms, words prevail over numbers.1Legal Information Institute. Uniform Commercial Code 3-114 – Contradictory Terms of Instrument The Consumer Financial Protection Bureau confirms banks follow this rule in practice: the spelled-out amount controls.2Consumer Financial Protection Bureau. I Received a Check Where the Words and the Numbers for the Amount Are Different. Is This Check Valid and for How Much? The reasoning is practical: changing “500” to “5,000” takes one stroke, while changing “Five hundred” to “Five thousand” means rewriting a whole word.
Protecting the Line From Alteration
Start writing as far left on the line as you can. When you finish, run a thick horizontal line from your last letter all the way to the printed “Dollars.” A check that reads “Two hundred fifty and 00/100 —————— Dollars” leaves nothing for a thief to work with.
Use dark, permanent ink. Standard ballpoint ink can sometimes be dissolved by common chemicals in a tactic called check washing, where a thief lifts the payee name and amount and rewrites the check for more. Gel-based pigment inks that soak into the paper fibers resist that kind of stripping better than conventional ballpoint ink, though no ink is completely tamper-proof.