What a congratulations card needs to do
Short answer: name the achievement, say why it matters to you, and stop. A congratulations card is not a letter. Three or four lines that mention the specific thing the person did will beat a paragraph of generic praise every time. Most people read a card twice, once at the party and once a week later when it's propped on a shelf. Write for the second read.
Lead with the thing, not the feeling
"Congratulations!" works as a headline. As the whole message it's a shrug. So put the detail in the first line: the job title, the degree, the address, the due date, the years of service. I look for the one noun that makes the card theirs and nobody else's. If the same message could go to anyone, it isn't finished yet.
Openings that work for common milestones
- New job: "They were lucky to get you. Now they know it."
- Graduation: "Four years of hard work, and you still had a life. Respect."
- Wedding: "You two are better together than either of you is apart."
- New baby: "Welcome, small person. You landed somewhere good."
- New home: "Here's to squeaky floors and knowing exactly which one it is."
- Retirement: "Thirty-one years of showing up. Enjoy the slow mornings."
Swap in the real number, the real field, the real name. Specific beats clever, and it beats sincere-but-vague by a wide margin.
Length and tone
Two sentences of substance is usually right. Four is generous. Past that the card stops being a card and becomes a report. Match the tone to the relationship rather than the occasion: a formal card for a coworker you like but don't text, an unhinged one for your brother. Warmth travels better than polish, and almost nobody keeps a card that reads like a press release.
What to leave out
- Unsolicited advice. "Now don't spend it all" ages badly.
- Comparisons to other people's milestones.
- Inside jokes, on the assumption the card gets read aloud. It will.
- Apologies for being late. Just say you're glad for them.
Signing off and using the space
Sign with the name the person actually calls you. If the card comes from a group, run the names down the left side instead of cramming them into the message. There's no rule that the inside has to be full. A short message with white space around it reads as confident.
One spelling note worth keeping: congratulations is always plural in this sense, and it takes on, as in "congratulations on the promotion."
A quick check before the envelope
- Does the message name the specific achievement?
- Could this card have gone to someone else? If yes, rewrite one line.
- Is it under five sentences?
- Did you spell their name correctly, including any accents?
- Is the signature recognizable to them, not just to you?