The bit which concerns me most is changes to working tax credits.
I'm self-employed and my business makes a small profit, but I rely heavily on tax credits (just the working kind, not the child kind) for my day to day life. It is not clear whether they come under the tax credit freeze, or whether the reduced income threshold applies (everything seems to mention families, so is this just for child tax credits?), and if the taper does start earlier, how much I will have to live on. Also, when will these new measures come into effect?
If the KPMG calculator is correct, I will be over £1,200 worse off. As I'm lucky my business is going quite well now, that will leave something like £6,500 to live on including estimated reduced credits. Better than many, but am galled they'd take it away and use it to subsidize inheritance thresholds for rich people.
Some might say tax credits shouldn't subsidise small businesses, but the £200 a month of tax credits enables me to live and continue my business, which pays a few thousand pounds a month into the local economy plus more into the national economy then more into the European economy. Much of the local money would not be generated at all if the shop did not exist.