Tax in relation to inheriting a house in the UK?

The Continental Op

I think I'm understanding this from https://www.moneyguideireland.com/inheritance-tax-in-ireland.html but there is one point that I can't work out is when the tax would have to be paid? The question boils down to when do you inherit? Is it when all the paperwork is done and probate is issued in the UK (which can take awhile) or when the person dies?

CAT is due when you are "beneficially entitled in possession" to the asset. Assuming you can't do anything with the property until probate issues (e.g. Live in or sell the property) you would use the date of actual inheritance, when the property is yours to do as you wish with it.

You will likely have a UK liability and should claim a foreign tax credit when calculating and paying any tax in Ireland.

The Continental Op

I'm hopefully thinking well in advance here but I think the limit on the second death in the UK, where both parents owned the house, is one million (twice £500k) and I don't think that limit is anyway near. I just need to check up if that's affected by not being domicile in the UK, I don't think it is.

I did the probate for my father a few years back and have some idea of the UK limits and the amounts I'm dealing with.

I'm really just looking to see how complicated it will be this time around. On the UK side it seems easy enough and I can get the probate through in a couple of months. I have PoA so have all the figures in advance to fill out the probate forms. Compared with getting all the information for probate from my father it has to be easier. For example mother swore blind there were no wills - found copies under one of the sofa seat cushions in the front room, I had to chase around getting bank details and found savings accounts that I didn't know existed and i seem to remember getting details of how many premium bonds he had was difficult.