The marvellous, magical £8bn
Sandwiched between the rise in Insurance Premium Tax (which raises between 2015-16 and 2020-21 the sum of £8.16bn) and the increases in the rate of tax payable on dividends (which, over the same period, raises £6,785bn) is this measure:

which over that period apparently delivers £7.83bn of new tax receipts.
What, you might well ask, is this? Further detail is provided here:

So this £7.83bn isn't new money at all. It's tomorrow's corporation tax receipts, that we're getting today instead. But because receipt of it is being accelerated into 2017-18 and 2018-19 we can all pretend that financial security has been delivered unto us:
https://twitter.com/George_Osborne/status/618800154091626496
This isn't the first time the Tories have pulled this trick either. It was delivered to the tune of £10bn in the last Parliament too (as I explain here).