BLUF meaning: bottom line up front
BLUF stands for bottom line up front: the conclusion or the request goes in the first line, and the details follow. It's chiefly a US military term, and it's now common advice for work email.
Last updated
BLUF.
means main point first
Filed under B jargon.
What BLUF asks for
The bottom line, first
BLUF stands for bottom line up front. The first sentence says what you’ve concluded or what you need, and everything after it is backup. A reader who stops after one line still knows what to do. The term is mostly American and mostly military: it marks conclusions and recommendations placed at the start of a text, so the reader can decide quickly.
The ask in the first two sentences
Current advice on work email says the same thing in office terms. Lead with the request or the decision you need, in the first sentence or two, and save the background for anyone who wants it. What BLUF replaces is the usual opening: a line of small talk, two paragraphs of context, and the actual ask somewhere near the sign-off.
Why busy readers need it
Most work emails get skimmed in under a minute. A skim covers the subject and the first lines, and little else. If the ask lives in paragraph four, the skim misses it, and the reply asks a question the email already answered.
How to write a BLUF email
Three parts, in order
- The bottom line: the decision, the request or the answer, with a date.
- The reason, in two or three lines.
- The detail, for anyone who needs it, or a link to it.
Some writers label the first line “BLUF:” so nobody misses it. Others leave the label off and just write the line. The label is optional; the order isn’t.
The same email, before and after
- Before: “Hope your week’s going well. As you know, the warehouse move has had a few moving parts. The first company came back yesterday. Long story short, we may want to look at a second one.”
- After: “I need a yes or no on a second moving company by Friday. The first one can only take 30 of our 45 desks.”
The second version is shorter, and it’s also the only one that can be answered with one word.
Put the ask in the subject too
“Decision needed by Friday: second moving company” tells the reader what the email wants before they open it. With the ask in the subject and in the first line, a lot of email can be handled from the inbox. The subject “Quick question” tells them nothing, and it’s rarely quick. A draft marked WIP works the same way: the subject should say what feedback you want and by when.
Bad news, bottom line still first
BLUF is easy with good news. Bad news tends to get the scenic route: three paragraphs on the company’s journey before the line about the reorg. Readers skip to the line anyway, so the journey only makes them angrier on the way down. Put the change first, then what it means for the reader, then the why.
BLUF at the office
The ask in paragraph four
The opposite of BLUF is the email that opens with history and a thank-you, then asks for budget sign-off in the last line. Nobody gets that far, so a meeting gets booked to discuss it. That’s one way a thing that could have been an email becomes a meeting, and Meeting or Email is built on telling the two apart.
BLUF in a meeting
The habit works out loud too. Open the meeting with the decision it has to make: “We’re here to pick a vendor, and we leave with one.” A meeting that states its bottom line up front can end when it’s reached. One that doesn’t tends to end with a promise to circle back.
BLUF fixes the vague endings
BLUF cures the email that ends in please advise. If the question is in the first line, there’s nothing left to advise on at the bottom. It does the same for FYA: the action is the bottom line, so it goes first. And a notice with its point up top can safely end with NRN.
BLUF and tl;dr
Tl;dr means too long; didn’t read. Its earliest known use is a newsgroup post from December 2002. It started as a jab at long posts and now also introduces a short summary of one. BLUF is the rule that the summary goes first and the message is built around it. Among the acronyms in the plain-English jargon dictionary, BLUF is one of the few that saves time instead of hiding something.
A BLUF email
Subject: Decision needed by Friday: second moving company
BLUF:The point: I need a yes or no on hiring a second moving company by Friday noon. The first one can only move 30 of our 45 desks on the weekend of the 14th. The quote is $2,400 and it’s attached.
Questions about BLUF
What is a BLUF in the military?
A way of writing where the conclusion and any recommendation come first, so the reader can decide without reading everything. It's mostly an American military term, and executive email advice now uses it too.
Is BLUF the same as tldr?
They're cousins. Tl;dr began as "too long; didn't read" and now also labels a short summary of a long text. BLUF is a rule that the main point goes first, in every message, long or short.
How to use BLUF in an email?
Write the decision or request you need in the first line, with a date. Give the reason in two or three lines, then put the detail last or in an attachment. Some writers start the first line with "BLUF:" so nobody misses it.
What does BLUF mean in slang?
The same as at work: bottom line up front. Said out loud in a meeting, it's a polite way of asking someone to get to the point.