Abbreviation for Million: M, MM or Mil, and Which to Use

By Mustafa Tarabya, founder of CVBooster · Published 2026-10-25 · Updated 2026-10-25

5 min read

The abbreviation for million is M in most business writing and on resumes, as in $2.5M, while MM is the convention in finance and accounting, as in $2.5MM, and British writing often uses a lowercase m, as in £2.5m. The one constraint is consistency: pick one form and use it for every figure in the same document, and spell out "million" in formal prose when there is room. Cambridge Dictionary lists the written abbreviation of million as a lowercase m. Six resume examples follow. Written by Mustafa Tarabya, who hired for his own company, read every application himself and now writes CVBooster's guides.

You grew revenue by $1.2 million and now you are stuck on how to write it. Somewhere a finance director is about to read "$1.2MM" and nod, and a marketing manager is about to read it and think it is a typo. The answer depends on which one is reading.

The abbreviation for million on a resume

Every figure uses the same style: dollar sign, numeral, capital M or K, no space. A reader takes in the numbers without stopping, which is the whole point of abbreviating.

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The main abbreviations for million, and where each is used

• M. The most common form in US business writing, presentations and resumes: $3M, 2M users. The Oxford Learner's Dictionary also gives "m" as the abbreviation.
• MM. The finance and accounting convention, from the Roman numeral M for a thousand: a thousand thousands. Banks, investment firms, oil and gas and many finance teams write $3MM. Wikipedia's entry on the million lists M, MM, lowercase m and the financial forms mn, mln and mio.
• m (lowercase). Common in British and Irish newspapers and business writing: £3m, €3m.
• mil. Informal, seen in headlines and casual writing; rare on a resume.
• mn, mln, mio. Seen in international finance reports and European writing. Avoid them on a US resume, because many readers will not recognise them.

Which abbreviation to use on a resume

• Match your field. Finance, accounting, banking and private equity resumes often use MM, because that is how the readers write internally. Everywhere else, use M.
• Use the same form everywhere. If one bullet says $2M and the next says $1.5 million, the reader notices the switch.
• Pair it with K for thousands. $350K and $1.2M sit well together; $350,000 and $1.2M look mismatched.
• No space, no period. Write $1.2M, never $1.2 M or $1.2 m.
• Spell it out in a cover letter. Letters are prose, so "$1.2 million" reads better there.

Million abbreviation for a finance resume

In a finance context MM is read correctly at a glance. Use it only if the employer's own reports or job adverts use it; otherwise, M is safer.

Writing millions in a cover letter

Spell out "million" in sentences and keep the numeral: "$2.5 million", not "two and a half million dollars", unless the number starts a sentence.

Millions that are not money

The same abbreviations work for users, units and views, as long as the unit is clear.

Mistakes with the million abbreviation

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Billion and thousand, for completeness

• Thousand: K ($350K). In finance you may see M for thousand and MM for million, which is why MM exists; never mix the two systems on one page.
• Billion: B ($1.2B) in most writing, and bn in British and international finance (£1.2bn).
• Trillion: T, or spell it out, since it rarely appears on a resume.

K, M and B side by side, each with a dollar sign, a numeral and no space. The reader can compare the three figures without converting anything.

Numbers are only as strong as the bullet around them. Our resume action verbs help you start each line, and our guide to ATS keywords from real job ads shows which words should sit next to the figures. For the general spelling and style questions around resumes, see how to spell resume. CVBooster checks each bullet against the posting: filling any of the 99 templates is free after you sign in, with the ATS score and gap list; the PDF and Word download is Pro.

Frequently asked questions

What is the abbreviation for million?

The most common abbreviation is M, as in $5M. In finance and accounting, MM is standard, as in $5MM, from the Roman numeral for a thousand. British writing often uses a lowercase m, as in £5m. Some international reports use mn or mln. Choose one form and use it consistently.

Is it M or MM for million on a resume?

Use M on most resumes, because it is the form nearly every reader understands. Use MM only for finance, banking, accounting or private equity roles, where readers use it themselves. Whichever you choose, write every figure in the same style and pair it with K for thousands.

How do you write 1.5 million in short form?

Write 1.5M, or $1.5M for money, with no space between the number and the M. In finance documents, $1.5MM is also correct. In a sentence in a cover letter, write $1.5 million. Avoid 1.5 mil on a resume, because it reads as informal.

Why does MM mean million?

In Roman numerals M stands for a thousand, so MM can be read as a thousand thousands, which is a million. Finance and accounting adopted MM to avoid confusing M for a thousand with M for a million. Outside those fields, M alone usually means million, which is why MM can look odd to other readers.

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