Who should pay the council tax?

Person A and person B are not financially compatible, either stay living apart or split up. Person A is self sufficient, person B and their dc are dependents - either on the state or a significant other. People who live solely on state benefits are only financially compatible with other people on state benefits. That's the welfare state that we've built.

Of course it matters that person B will lose benefits and might need to pay towards council tax when they are exempt.And A will be saving loads. B needs to tell A she can't move in.

Given that £800 is just the bit she’s losing, and that’s she is losing, she must be getting quite a sizeable amount.

That is about 50% of the take home pay on minimum wage. Almost 50% of the partners full time income from working.

So yes - that is quite a lot of money!

This isn’t any easy one BUT you need to work through the finances so neither A nor B is worse off, or should equally be worse off.

Person B needs to stop thinking about how much better off Person A may or may not be. Person A's finances are nothing to do with person B.

Person A would only pay 1/3rd of the bills as they are 1 of the 3 living in the house.

TBH i don't see that this can be resolved easily and no matter what way it's cut it will cause resentment.

A would be an absolute fool to agree to move into a property, taking on majority bills, pay for their partners child and have no security and be made homeless at anytime!

Okay - so the OP has clarified re: child. When more people share a property then household expenses will increase as there'll be more water used, potentially more fuel used to heat water, more cooking, etc, etc. That's aside from the council tax position. I think you share the increase. If her position is that she needs to have the same money as before the person moved in living together probably isn't the right thing to do.

How on earth can you read this and assume op is A? The whole op is about how A should be paying so much much more!

It's simple. Person B isn't liable for council tax so person A pays. You must be person A and you are trying to rip person B off, which is pretty tight given that they're disabled. They won't be saving any money, you will. Utility bills only come to around £200 tops in my house.

A and B should continue living separately.

It only matters because if the exemption was due to a SMI then person A would only pay 75% ( which presumably they are already doing where they currently live)

But the OP also states B has a disabled child. I am confused.

But it doesn't matter what the reason for their exemption was. It matters that the reason they now have to pay is solely because of person A. Why should B lose money?

The OP said that A earned £2k not B

Well 2K a month from benefits is quite generous wouldn’t you say?

I once had a similar dilemma as a F/T student. Was technically exempt from paying CT. But I moved into a houseshare where some others were working, and they had to pay full amount. Their contributions would have gone up if I'd not paid my share. So I paid.

Agree that in OP's situation, before there are any moves, the people involved should make a spreadsheet of ALL household expenses and income and work out the respective contributions or there will be resentment down the line.

Generous!! Have you ever lived on benefits?

Are you seriously going to pay a man several hundred pounds a month to live with you and your child? That's what this amounts to, OP. You'll lose £800 at least every month because you're living with a man - AnyFucker's gold-plated cock remarks come to mind!

Seriously though why would you do that? Keep your independence. It's highly unlikely your child's life will improve if you live with another man now. If it goes belly up you may well be the one who has to find somewhere suitable to live as he'd be on your tenancy. Why would you make yourself so vulnerable?

Combine all costs and bills, then divide in proportion to income. If there is already difficulty over who pays what, don’t live together.

You never answered me about how much B brings in prior to and after the move?

Have you discussed deposit too? I assume you have a deposit when you initially moved in. Does B have half of this for you too?

What are your monthly bills now and your income? Like I said before, if you will be out of pocket, don't do it.

Just do a before/after spreadsheet with all outgoings (income, benefits, bills, housing costs, council tax, transport costs, etc etc). And then you can adjust so that it is fair to both of you.
Surly you will both be saving on housing costs, and this savings should compensate the increased CT (having to pay it for you / losing the single person discount for your OH). You will lose some benefits but you’ll have someone paying half of the rent/bills even though it also covers your child.
Basically, you don’t want one person to be worse off and no change for the other one. Or one person to be better off but not the other.

This

I agree it should be split evenly, I’m just explaining why exactly the issue has probably occurred and focuses on this bill rather than the rest.

While b may be losing out on benefits they will be getting help round the house, cooking, cleaning, Gelo with the child etc. Also agree that how much B is getting in benefits is important here…..

The £2k I assume is uc - lwcra - pip and maybe dla