I am not sure if AIBU or not here.
We have a good income - DH is the main earner and I work PT. All the money goes into one pot and all the bills and savings come out, we then have our own accounts into which our personal spending money is paid. Our expenditure is quite high because we recently moved house and had some work to do on it. We are not on the breadline.
The savings are joint but DH keeps a close eye on them and I have to get his agreement to transfer any out.
DH has always had more personal spending money because he had more expenses - travel to work, lunches etc whereas I have always WFH. He has WFH since March 2020 but still gets £150 a month more than me.
However, I spend a lot of "my" money on the kids - a magazine, a hot chocolate after swimming, that kind of thing. I also spend my money if our joint account is a bit light.
I set some money aside for Christmas each month out of my spends usually as DH goes mad at the amount I spend. When I stopped buying for his side of the family he agreed with them not to bother with presents anymore, although he does still buy for his mum (which this year was something from Amazon and he used my account). This means the only other present he buys is for me and that is about £50.
I had to use most of my Christmas fund of £600 in November because we had to get an emergency plumber out for a leak. I used my credit card to buy presents etc instead as our joint account was also practically bare - bad month for things needing to be paid out plus DH spent an absolute fortune on the Christmas food (I guess around £500).
My credit card bill is £800 and DH has hit the roof. This breaks down to about £150 on the DC (including things like a Christmas jumper, new Christmas pyjamas etc), £200 on my sister and her family (there are 4 kids), £120 on the Christmas tree, some decorations, stocking Knick knacks and 24 Christmas crackers (we had both of our families over during the Christmas period) we also needed a new table cloth as we have a new table, £90 on presents for his 3 team members (yes, I buy them 🙄), his mum's present £40, my mum and step dad £100 (who do an enormous amount for us in terms of childcare), £40 for my dad and a wine order for £90, there were also small bits like postage for cards abroad.
I had to set out what each item was and who it was for. He says he will only give me £130 towards it for his mum and team (I have also suggested he will need to split the kids' presents and the wine but he is grumbling that he did not "authorise" these payments). It will take me about 3 months to clear the rest and leave me with about £50 a month to spend. Meanwhile we have £20k in savings.
I don't actually think I have spent more than usual, it's just that I usually cover it without any input from him from my personal spends.