What Does PS Mean at End of Letter? Explained
You finish an email, type your name, and then remember the one detail you meant to include.
Maybe it is a deadline. Maybe it is a thank-you. Maybe it is a quick note that makes the message warmer and more human. You could go back and rewrite the whole email. Or you could add one short line at the end.
That is where PS comes in.
If you have ever wondered what does ps mean at end of letter, the short answer is simple. It means you are adding something after the main message is already complete. The more useful answer is that PS is not just an old writing habit. It is still a practical tool, and when used well, it can make a message clearer, more memorable, and more personal.
What a PS Actually Means
You have probably seen it in letters, cards, and emails:
Best, Maya
P.S. Don’t forget the meeting starts at 9.
In that example, P.S. tells the reader, “This is an extra note added after the main message.”
The term stands for postscriptum, which means content written after the letter itself is finished. In plain English, it is an add-on.
A simple way to think about it
A PS is like the note you call out while someone is already heading out the door.
The main conversation is over. Then you say, “One more thing.” That final remark is often the part people remember.
That is why PS has lasted so long. It solves a very human problem. We often think of one last detail after we feel done.
What readers often confuse
People sometimes assume a PS means the writer forgot something by accident. Sometimes that is true. But not always.
Today, many writers use a PS on purpose for things like:
- A reminder such as a deadline or next step
- A personal touch such as “Hope your trip goes well”
- A final note that does not belong in the main body
- A light emphasis on the one thing they want remembered
Tip: If the added point is essential to understanding the message, it usually belongs in the body, not in a PS.
A good PS feels brief and natural. It should sound like a helpful add-on, not as if the central message was hidden at the bottom.
The Surprising Origin of the Postscript
P.S. comes from the Latin term postscriptum, meaning “written after”. Its use goes back centuries, and early examples appear in medieval manuscripts and biblical texts from as early as 55-57 AD, where notes were added after the main writing to authenticate authorship, as described in Wikipedia’s entry on the postscript.
Why people needed PS in the first place
Before email, editing was inconvenient.
If you wrote a letter by hand with ink, or typed it on a typewriter, adding a missed idea was not easy. You either started over or placed the extra thought at the end. The postscript saved time and effort.
That practical need gave PS its first job. It was a repair tool.
Then it became something more. Writers started using it not just for forgotten details, but for deliberate effect. A postscript could sound intimate, direct, and slightly more personal than the formal body above it.
Why the old history still matters
The history explains why PS still feels distinct even in modern email.
A sentence in the middle of an email feels like part of the main flow. A sentence marked PS feels separated. It has its own little spotlight.
That visual separation is part of the reason people notice it. It still carries the feeling of an intentional afterthought, even when the writer planned it all along.
A modern analogy
Think of the body of your email as the scheduled agenda.
Think of the PS as the comment you make while closing your notebook and standing up from the meeting. It is short, often memorable, and often more personal in tone.
That is why people still use it. Not because email cannot be edited, but because the PS format creates emphasis that regular body text does not.
Why Your Brain Pays Attention to a PS
A PS stands out for a psychological reason, not just a formatting reason.
Readers tend to remember the beginning and end of a message better than the middle. This is known as the serial position effect. According to Mailchimp’s explanation of PS in email, readers have 20-30% higher recall for information at the very end of a message, and using a PS for a call to action can increase click-through rates by up to 15%.
Why this matters in email
Most professionals do not read every email line by line. They scan.
They look at the subject line, the greeting, a few key phrases, and the closing. If a PS appears after the sign-off, it can catch the eye because it sits in a place readers naturally notice.
That makes it useful for one carefully chosen point.
What a PS does well
A PS often works best when it carries one of these jobs:
A final action Example: “P.S. Please send the file before Friday.”
A warm personal note Example: “P.S. I hope the conference went well.”
A reminder that should not get buried Example: “P.S. The access link has changed.”
A small extra detail Example: “P.S. I attached the shorter version too.”
If you write follow-ups often, the same logic applies to endings and memorable final lines. This guide on writing an email subject line for follow up pairs well with the way a PS helps land the final note.
The hidden strength of a PS
A PS does not only attract attention. It also changes tone.
Because it appears after the formal close, it can feel more direct and conversational. Readers often experience it as a side note meant especially for them, even when the email is standard.
Key takeaway: A PS works best when it gives the reader one last useful thing to notice. It loses power when it repeats the whole email or carries too much weight.
That is why smart use matters. The same device that feels charming in one email can feel careless in another.
PS Etiquette in Professional and Casual Emails
PS can help. PS can also make you look unprepared.
That second outcome matters more in formal work settings than often perceived. As Grammarly’s discussion of PS usage points out, many guides explain the function of a PS, but few deal with the professional risk. In high-stakes communication, an awkward or unnecessary PS can signal weak planning.
When a PS helps
In everyday professional email, a PS can work well when the message benefits from a light final note.
Good examples include:
A friendly closer “P.S. It was great meeting your team yesterday.”
A gentle reminder “P.S. Please reply with your preferred time.”
A useful extra “P.S. I included the shorter summary if that is easier to review.”
These uses feel natural because they support the message without carrying its core burden.
When a PS hurts
A PS becomes risky when it contains something the reader should have seen earlier.
That includes critical instructions, legal terms, deal points, pricing details, or anything that could affect a decision. In those cases, the PS can make the message look patched together.
If you are writing a formal proposal, executive update, contract-related email, or a sensitive client message, put the important information in the main body.
Rule of thumb: If the reader could reasonably say, “You should have put that higher up,” do not hide it in a PS.
When to Use a PS in Emails
| Context | Do Use a PS For... | Don't Use a PS For... |
|---|---|---|
| Casual note to a colleague | A warm personal aside, a light reminder, a quick extra detail | The main request or key project update |
| Client follow-up | A polite next step, a soft reminder, a brief thank-you | Contract terms, scope changes, or anything sensitive |
| Sales or outreach email | One short closing prompt or memorable extra note | The full pitch or the only explanation of your offer |
| Internal team update | A human closing comment or a nonessential reminder | Critical deadlines that everyone must see |
| Executive communication | A very small courtesy note, if the relationship allows it | Core decisions, budget points, or strategic changes |
| Formal proposal or legal context | Usually avoid PS altogether | Any required detail, condition, or formal clarification |
Professional versus casual tone
Casual email gives you more room. A PS can sound friendly and relaxed there.
Professional email requires more judgment. The more formal the situation, the less likely a PS should carry anything important. If you need help shaping the rest of the closing, this guide on how to sign off a professional email helps you match the ending to the relationship.
A useful test before sending
Ask two questions:
- Does this PS add value, or does it repair weak structure?
- Would the message still make perfect sense if the PS disappeared?
If the answer to the second question is no, move that information into the body.
Understanding Advanced Variations like PPS
Many are familiar with PS. Fewer know PPS.
PPS means post-postscript. It is the note that comes after the first postscript. You may also see it written as P.P.S.
How PPS should work
The sequence is simple:
Best, Jordan
P.S. I attached the report. P.P.S. The appendix is the part most relevant to your team.
That structure is technically correct. The second note comes after the first.
The mistake to avoid
A common error is writing PSS instead of PPS. According to Paul Brians’ note on PPS usage, this mistake appears in 5-7% of informal digital samples and can reduce perceived professionalism.
That error usually happens because people guess the pattern instead of understanding it. The second note is not “P.S.S.” It is another postscript after the first one, so it becomes P.P.S.
Should you use PPS in professional writing
Usually, rarely.
A single PS can feel polished. A PPS can feel playful or overly casual unless the context supports it. In most business email, if you have enough extra information to need a PPS, the cleaner choice is to revise the body.
Best practice: Use one PS if needed. If you are tempted to add a PPS, stop and ask whether the email would be clearer if rewritten.
The more postscripts you stack, the more the message can seem improvised.
A Simple Checklist for Using a PS
Before adding a PS, pause for a quick review.
This helps you use it as a tool, not a habit.
The five-question check
Is this essential? If the message fails without it, move it into the main body.
Is it brief enough? A good PS is short. If it turns into a paragraph, it is probably not a PS anymore.
Does it fit the relationship? A friendly PS may work with a colleague or familiar client. It may feel off in a formal executive email.
Does it add clarity or just clutter? Keep the note if it sharpens the ending. Cut it if it repeats what the reader already saw.
Am I using PS too often? Overuse weakens the effect. Indeed’s discussion of PS in email notes that while PS can capture attention, there is little data on diminishing returns from overuse, and frequent recipients may become fatigued if every message ends this way.
A simple decision rule
Use a PS when all three are true:
- The note is helpful but not central.
- The ending benefits from emphasis or warmth.
- The format matches the tone of the relationship.
If one of those fails, rewrite the email instead.
Two good examples
Better use P.S. I’m happy to send the shorter version if that is easier to review.
Poor use P.S. The proposal price changed and legal needs approval before Friday.
The first adds convenience. The second hides vital information.
If you want a stronger foundation for the whole message, not just the ending, this guide on how to write business emails can help you structure the body so the PS stays optional.
Final takeaway: The best PS feels intentional, light, and easy to spot. It should reward the reader, not rescue the writer.
If you spend too much time drafting emails and trying to match the right tone for each person, Draftery helps by creating Gmail drafts in your own voice, with different writing styles for different recipients. It is built for busy professionals who want faster replies without sounding generic.
