How would you split this cost?

[Whitetruck]

Uk holiday with DP. On a bit of a whim I invited a just adult DC to come with us. I'll cover his cost, DP is not his dad and doesn't live with us. TBH I didn't expect DS to say yes, but it's good news that he did. He'll mostly go off and do his own thing, for various reasons this will be good for him and DP is supportive for that.

Anyway that's meant I've now changed the 1 bed apartment to a 2 bed cottage, although the cost is only c. £100 extra.

DS will join us halfway through the week because of work commitments.

I'm thinking keep it simple and split 3 ways withnme paying 2/3, but also think I might be shortchanging myself like that because the extra cost of DS coming is only £100 (total cost £700). OTOH you could argue DS's share is half, as he'll have one of the 2 rooms, so I should pay 3/4.

Fwiw, I don't expect it to be a big issue, just wondering what to suggest.

19. Yes. DS has had a shocking time and it's excellent news that he wants to leave the house at all. That's not the issue though.

I would cover your share plus the incremental cost increase.

I'd just pay the extra £100, not sure why you'd pay 2/3s when the cost has only changed by £100?

Your half plus the £100.
Theres no need to overthink it this much.

He probably would but I don't intend to ask him.

I'm more than happy to pay the £100. Money very well spent afaic in current circumstances, but if we split 2/3 or 3/4 it will cost me more than that.

E.g. original cost £600 = £300 each
New cost £700 split 3 ways = £233 each so I pay £466
Or new cost by rooms = £350 per room so I pay £525

TBH I'd be perfectly happy to pay the whole thing, but DP will want to feel it's right, in that he'll want to feel he's contributed enough.

Oh the quote had changed by the time I typed my response 🤣

I would split the oringinal bill 50:50 and you pay the extra 100 for DS. Your DP is not losing anything. It’s not like you and he will get a shit bedroom. Infact generally a bigger cottage means the living space and kitchen is better so DP is benefitting
im saying this with the assumption DP is absolutely fine with DS coming.
why would DP get a cheaper holiday than he was going to? The boy is 19. And in this day and age that’s still a dependent in real terms

Exactly this.

Agree with PPs your partner pays 50% of the original bill and you pay everything else

Keep the original split, and you pay the extra £100. That's the simplest way.

Its £100.
Just pay it yourself- you invited your son....

I intend to pay it, at least the £100, but splitting cost by person or by room will cost me more than £100

Well that's what happens when you invite an extra person on holiday.

I’d pay half plus the £100 extra

I did say in OP it won't be an issue. I'm not sure why some people are so upset about me inviting my son on holiday.

DP is just (almost) as happy as I am that DS wants to come. It's huge progress and DP is happy to see me feeling better/less worried about him.

The money won't be an issue at all, I was just interested in views on what "feels" right.

I think that whatever your partner was paying before, he still pays. His costs should be exactly what they were before And you pay everything else.

Which is whatever you were paying before plus the cost of the extra person you are bringing.

I would treat it as a new holiday - because it is. New number of people, new accommodation. And if it's three adults then each pays a third.

Yes, that was my original instinct, then I realised inviting DS had cost me more than I thought 🤣