Doesn't matter vs So what

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

Doesn't matter

Top 2,000 (common)

So what

InformalTop 2,000 (common)
Most formal: Doesn't matter
 Doesn't matterSo what
Pronunciation🇬🇧 //ˈdʌzənt ˈmætə//🇺🇸 //ˈdʌzənt ˈmætɚ//🇬🇧 //səʊ wɒt//🇺🇸 //soʊ wɑt//
MeaningIt's not important.A phrase used to express indifference or lack of concern.
ExampleI can go to the party or not; it really doesn't matter to me.He failed the test, and I just said, 'So what? It's not the end of the world.'
RegisterNeutralInformal
How commonTop 2,000 (common)Top 2,000 (common)
Collocationsdoesn't matter how, doesn't matter what, doesn't matter whensay so what, act like it matters, respond with so what
Antonymsmatters, is important, is relevant-
Common mistakesOmitting 'not' (saying 'do matter')., Using in overly formal contexts., Misunderstanding the tone, which can sound dismissive.Using it in formal writing or speeches., Confusing its meaning with 'so what?' as a question., Overusing it in conversations, which can seem dismissive.
Usage notesUse when something is unimportant or irrelevant. Avoid in formal writing.Used in casual conversations to dismiss a comment or situation. Avoid in formal contexts.

See it in real clips

Doesn't matter
So what

Frequently asked questions: Doesn't matter vs So what

What's the difference between Doesn't matter and So what?

Doesn't matter: It's not important. So what: A phrase used to express indifference or lack of concern.

Which is more formal: Doesn't matter and So what?

Doesn't matter is the most formal of these.

Can you show an example of each?

Doesn't matter: I can go to the party or not; it really doesn't matter to me. So what: He failed the test, and I just said, 'So what? It's not the end of the world.'

Can I use Doesn't matter and So what interchangeably?

Not always. Doesn't matter and So what 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.