Can I get DH to stop talking (boasting) about money?

Slightly different view point - have you thought about why he is 'boasting' (in your view) to his parents? Does he crave validation from them do you think?

As we don't have a full description of how this went down but from what you have said, it's OK unless the parents are majorly struggling financially which I assume they are not as you would have added it @LotusBotus . I do feel your dh is looking for validation that he has made it. Again that is not necessarily a bad thing. Do you think people around him adequately validate him? Appreciate how far he has come? It may be annoying but some people need it (it can be healthy or unhealthy. Depends).
What about you? Are you generally uncomfortable with discussing finances? Do you comanage your finance with dp? Do you know the ins and out of your finances and business? God forbid but if your dh was to collapse and die would you know where you are financially, any business debts etc. If you answer no to any of these questions I suggest you start getting into these discussions with him. Bring yourself up to speed while validating him positively

Were his parents supportive of him growing up or did they tend to put him down, suggest that he wouldn't make much of himself?

Does he have decent self esteem or is this his way of talking himself up - to himself?

As long as it's only his parents leave him be. They might be very proud to hear how he's doing, but if they don't want to hear let them tell him to put a sock in it.

Are you his business partner? Do you discuss your career successes and key life milestones with your own parents?

Did he feel they didn't expect much from him when he was growing up and he's trying to prove he's done well?

BTW I hope he's generous with his parents - I'd hate my son to bang on about his wealth, if he knew I would really appreciate some help.

If he was going around shoehorning money into every conversation in social situations, I'd maybe agree with you.

But it's really not your place to tell him what to talk to his parents about. If it bothers you, stop listening to his conversations with them.

I think you're looking at financial conversations through different lenses, and I don't see anything wrong with his conversations with his parents.

You can see any house purchase price online – it's no secret.

It doesn't sound like he's boasting to me. It sounds like he's using his parents as a sounding board for guidance/reassurance. It's good he has that relationship with them.

It's his parents, not your parents... Seems quite controlling...

I’m still really not sure what your issue is - they’re his parents

The first time I got offered a high paying job I told my Mum because I knew her reaction would be great. It wasn't really that high a salary, £48k back in 2017 but as a 30YO son of a woman who has done minimum wage jobs around kids and grandkids for 20 years so I wanted her to know.

I think it's fine even if your husband goes out of his way to bring it into conversation just with his parents.

A family relative of mine outright asked me the other day if my job pays well, I just told them what I was on and they said oh that's great.

Talking about money is only vain if you have none, I wouldn't go bragging to the Big Issue seller or anything but if someone asks I'll answer.

Used to work in a small consultancy firm where salaries were like an MI5 national secret, it meant they underpaid me for years and I was none the wiser. Fuck that, let's talk.

Of course YABU

If you can't discuss with your own parents, who can you discuss with?
Who cares if he's boasting? They raised him, they know him better than you do anyway.

If it doesn't boast in front of everybody else, there's nothing confidential here.

As long as the parents don't expect to move in the granny annex of course

You just sound as if you’ve absorbed some LMC dictum about mentioning money ‘not being nice’, and think your DH should be obeying it regardless of his hearers. It sounds to me as if he’s trying to reassure them, or say ‘Look, this is how well I’m doing — aren’t you proud?’ Are they?

Sounds like he thinks that’s how they measure success and is trying to tell them he is successful (and therefore they should be proud of him, achieving success on their terms). How’s the relationship generally with his folks? Are they quite materialistic/money focussed people?
If he did it with everyone I’d be leaning towards the ‘he’s being a bit of a knob’ but doesn’t sound like he is?

YABU

I would never be anything other than proud and delighted if one of my DCs was doing so well financially, I would love to hear about it.

I dont think boasting is a thing if you are talking to your parents.You're being oversensitive

Does he do this with anyone else?
If it's only with his parents, you can roll your eyes and let him crack on. If it's anyone else you can ask him not to.

I think it’s actually quite sad that you feel he shouldn’t talk to his parents about money.

How is budget not relevant?

Hey m & d, we're buying a house

Ooh lovely what are you looking for?

X bedrooms in x

Oh that's going to expensive/cheap

we've got xxxx to spend, so should be able to find something

I'm with you, I don't talk about money, or at least amounts to my family or friends or anyone. My ex - he used to with his family and it was really irritating. I could see them calculating things in their heads when I bought something or when you booked a holiday, or paid for a meal. They used to outright ask what things cost and I used to be embarrassed/annoyed and just say I can't remember. Him and his family were all money grabbers, tight and laughed at others misfortune and didn't sit well with me at all.

I was going to totally agree with you, until I saw it was his parents. It's quite sweet in a way that he wants them to be proud of him!