No thanks vs Not interested

When to use each in English, with meaning, register, and examples.

No thanks

Top 2,000 (common)

Not interested

InformalTop 2,000 (common)
Most formal: No thanks
 No thanksNot interested
Pronunciation🇬🇧 //nəʊ θæŋks//🇺🇸 //noʊ θæŋks//🇬🇧 //nɒt ˈɪntrəstɪd//🇺🇸 //nɑt ˈɪntrəstɪd//
MeaningUsed to politely refuse something.Don't want to know or be involved.
ExampleWould you like some dessert? No thanks.When he asked if I wanted to join the club, I replied that I was not interested.
RegisterNeutralInformal
How commonTop 2,000 (common)Top 2,000 (common)
Collocationsno thanks, say no thanks, give a no thanks, offer no thanks, respond with no thanksclearly not interested, not interested at all, seem not interested, generally not interested, not interested in
Common mistakesSaying 'no thank you' in very casual contexts, where 'no thanks' is preferred., Using 'no thanks' in very formal situations where a more elaborate response might be needed.Using it in a formal conversation where politeness is needed., Confusing it with 'not interested in' when specifying a subject., Overusing it when a softer response is more appropriate.
Usage notesUse 'no thanks' when declining offers or suggestions politely. It's appropriate in most informal and some formal situations.Used in casual conversations to express disinterest. Avoid in formal situations. Can be blunt.

Frequently asked questions: No thanks vs Not interested

What's the difference between No thanks and Not interested?

No thanks: Used to politely refuse something. Not interested: Don't want to know or be involved.

Which is more formal: No thanks and Not interested?

No thanks is the most formal of these.

Can you show an example of each?

No thanks: Would you like some dessert? No thanks. Not interested: When he asked if I wanted to join the club, I replied that I was not interested.

Can I use No thanks and Not interested interchangeably?

Not always. No thanks and Not interested are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

Related comparisons