“Ok thank you” should almost always be written with a comma: “Ok, thank you” (or “OK, thank you”). The comma separates two distinct thoughts — the acknowledgment (“ok”) and the expression of gratitude (“thank you”) — and leaving it out makes the sentence run two ideas together without a pause. Written without punctuation, it reads fine in a quick text but looks sloppy in an email or formal message.
The Short Answer
“Ok” and “thank you” are two separate interjections stacked back to back. Grammatically, that calls for a comma between them: “Ok, thank you.” You’ll also see it written as “OK, thank you” (capitalized) or “Okay, thank you” (spelled out) — all three are acceptable, and the choice comes down to formality rather than correctness.
- Casual text or chat: “ok thank you” (no comma, lowercase) is completely normal and understood instantly.
- Email or professional message: “Okay, thank you.” or “OK, thank you.” reads more polished.
- Formal writing: avoid “ok” altogether — use “Understood, thank you” or “Noted, thank you” instead.
Why the Comma Matters
English separates two independent interjections or short clauses with a comma when they’re spoken as distinct beats. Say the phrase out loud: there’s a natural pause between “ok” and “thank you.” Punctuation exists to mark that pause on the page. Without it, “ok thank you” can look like a typo or like the words are meant to be read as one rushed unit, which changes the tone from polite to abrupt.
Compare it to similar pairs people already punctuate correctly: “Yes, thank you.” “No, thanks.” “Sure, thank you.” Nobody writes “yes thank you” in a formal note and calls it standard — “ok thank you” follows the same rule, it’s just used so casually online that the comma often gets dropped by habit.
Does Skipping the Comma Make It Wrong?
Not wrong exactly — just informal. In texting, chat apps, and quick replies, punctuation rules loosen and “ok thank you” is universally understood as friendly and complete. The comma matters more the more formal the setting: a client email, a cover letter, a customer service reply. There, include it.
What the Phrase Actually Means
“Ok thank you” (or “Ok, thank you”) signals two things at once: acceptance and gratitude. “Ok” confirms you’ve understood, agreed, or are moving forward. “Thank you” adds appreciation on top of that confirmation. It’s a compact way to close a small exchange — someone gives you information, permission, or help, and you’re wrapping up the conversation politely without needing more back-and-forth.
Tone: Can It Sound Curt?
Yes, and this trips people up. Sent alone with no punctuation and no exclamation point, “ok thank you” can read as flat or even a little dismissive — especially in text, where tone is hard to read. If you want it to sound warmer, small changes help a lot:
- “Okay, thank you so much!” — adds warmth and enthusiasm.
- “Okay, thank you for letting me know.” — adds context and softens the close.
- “Got it, thanks!” — a friendlier, more casual alternative.
Examples in a Sentence
| Context | Example |
|---|---|
| Text message | “ok thank you, see you at 6” |
| Work email | “Okay, thank you for the update — I’ll adjust the schedule accordingly.” |
| Customer service reply | “OK, thank you for your patience while we look into this.” |
| Formal letter | “Understood. Thank you for bringing this to my attention.” |
Key Takeaways
- “Ok, thank you” is the grammatically correct form — the comma separates the acknowledgment from the thanks.
- “ok thank you” without a comma is fine in texts and casual chat, but looks unpolished in professional writing.
- “OK,” “Okay,” and “Ok,” are all acceptable spellings; “Okay” tends to read as slightly more formal.
- Without extra warmth (an exclamation point, an added clause), the phrase can come across as curt in text form.
- In formal contexts, swap “ok” for “understood,” “noted,” or “got it” and keep the comma before “thank you.”
Frequently Asked Questions
Is it “ok thank you” or “ok, thank you”?
The correct written form uses a comma: “Ok, thank you.” Leaving the comma out is common in texting and informal chat but isn’t standard punctuation.
Is “OK, thank you” grammatically correct?
Yes. “OK” (or “Okay”) functions as an interjection, and a comma correctly separates it from the following “thank you.”
Does “ok thank you” sound rude?
Not inherently, but without punctuation or added warmth it can come across as curt, especially in text where tone is hard to read. Adding “so much,” an exclamation point, or a follow-up clause softens it.
Should I use “ok, thank you” or “okay, thank you” in emails?
“Okay, thank you” is slightly more polished for professional emails since “okay” is the fully spelled-out form. Both are understood the same way, so either works.
Is it okay to reply to a boss or client with just “ok thank you”?
It’s acceptable but bare-bones. A fuller reply like “Okay, thank you — I’ll take care of it” shows more engagement and reads more professionally.
“Ok, thank you” is a small phrase, but the comma is the difference between a polished reply and a rushed one. If phrases like this trip you up often, it’s worth browsing a few more comma and punctuation guides on the site — small fixes like this add up fast.
