If you said that you were “happy to spring for a takeaway”..

[CurlewKate]

..would your friendship circle knew what you meant?

i would say you are going to buy everyone a takeaway

Yes, they wouldn't let me pay for it we'd share the bill but it's a pretty common phrase isn't it?

Yep, you’re buying

That you’re paying?

I know what it means but it's not an expression I've ever said or heard anyone else say irl.

You're happy to pay for everyone.

Never heard of it.

That doesn't mean it's not a common phrase though?

No, but I’m not from UK originally
It does sound for me like you are offering to pay but I will definitely double check.

Not something I’ve ever heard said. None of my friends would know what it meant

Yes it does. If it was "common" I would have heard it or read it before.

Never heard the phrase spring in this context.

I’d be unsure whether you were offering to pay for everybody, or just saying that you were ok to pay for your own.

It’s your treat. I’m NE Scotland and it’s not a phrase I hear people say often here, but I know what it means. I’d say more along the lines of “it’s my shout” or “it’s our turn to get this”.

I meant just because you hadn't personally heard it didn't mean it wasn't a common phrase. Obviously not everyone will know it but I'd say it was common enough that most people would have and would know what it meant.

Never heard of it. Unsure if you mean you really want one, you will go round and collect it or you will treat everyone to a takeaway.

I've never heard it before. I would have guessed it's something like 'nip out to pick up a takeaway'.

Never heard the phrase. If I was paying, I'd just say "on me" or "my treat"

I would take it that it was your treat.

I’ve never heard it but my first thought was chip in as share, glad I know it isn’t that! Is it a new phrase?

Never heard that phrase

We’ll just have to disagree on the meaning of the word "common". (But since the dictionary says it means "occurring frequently, widely known…describes things that are ordinary, everyday, or commonplace", and a number of other posters here didn’t know what the phrase in question meant, I’m confident that I know what "common" means!)

I think you would mean you were paying, but I also said it back to myself in an Australian accent so maybe I would be a bit confused.

This.
If I wanted everyone to pay for themselves I'd say shall we have a takeaway?

Never heard that expression before. I’d need to ask what you meant.