It’s going to depend on what you want to save for and what your budget is like. Sometimes less is more and it can be easy to go overboard on spending on things which are not necessary or don’t add much value/pleasure.
Have a think about what you may want out of the following:
decorations
wrapping paper and cards/stamps
activities/events
travel costs
outfits
gifts
food and drink
tableware
Now is a good time to see what you can get in the sales in terms of Christmas decorations, tree, crackers, wrapping paper and cards which you are likely to find at half price. If you were paying full price, you could be looking at a minimum of £200 if starting from scratch for the tree and decorations. If you have the money now, it really is a good time to buy.
The rest of the things are a bit like how long is a piece of string. The more things you do, and the more people who are involved, the more things will cost and the more you will need to budget. Only you can work out how much things will cost. I would work out what the total spend is likely to be and then divide by 10 (assuming that you will be looking to buy things earlier rather than leaving things to the last minute).
We have reduced what we spend on Christmas over the last few years and tbh, it has not made any difference to how much we enjoy the festive season.