@CheeseMaiden well, we only started doing it this month but, yes, it has definitely stopped the frittering. Christmas was an eye opener for us.
On paper we have plenty of money and we shouldn't be scrabbling around at the end of the month but we just weren't being honest with ourselves with what we spend.
Between us we have £750 a month spending money (on paper!) but often we would run out because something unexpected cropped up and we hadn't budgeted properly. Also the way we split our money wasn't working as I ended up bearing more of the cost of DC than DH.
We now have a spreadsheet for the year with planned expenses on so we can see what we will need and when - for example we have half term this month and the DC will need to go to holiday club - that's £300 for the week. Then we have 4 family birthdays, usually I would think "oh I need £100 for those" but the reality it I would overspend by £20, then have to get cards and wrapping paper and wouldn't it be nice to take a cake to MIL... before I knew it I would have spent £150.
Even down to haircuts and shoes are on the spreadsheet now.
We have started pots for different expenses, all on the spreadsheet.
In reality we have about £200 a month for unplanned spends, which is absolutely fine, but we need to keep an eye on those little spends - I usually get a coffee and a pastry after school run on a Friday, £4 a week, drinks and snacks after swimming £5 and so on. We each have £100 a month to spend on whatever we want for ourselves which I think is fine.
I have my £2.72 still (out of the £60 I had at the beginning of the month) and get paid today but my new budget starts Monday and so I am going to try to have NSDs this weekend - we are visiting MIL (her birthday is next week) and so we shouldn't have any unplanned spends - we have got her a small present from the DC (DH doesn't do presents with his family) and we are baking a cake to take with us but other than that we shouldn't need to spend anything else.
Our joint account is looking healthy for once, we had £200 left over last month just by cutting back on our food shopping.
We even have a small savings pot this month for future planned spending.
Just got to stick to it now!!