Analysis from Quilter earlier this year found more than a fifth of those under 40 were expected to be hit by the fiscal drag effect of frozen tax thresholds.
The analysis, based on an FOI response from HMRC, found 3.6mn under 40s would be brought into the higher rate of income tax due to the threshold freezes in the tax years 2022-23 to 2027-28, and a further half a million would be brought into the additional rate.
Flora Barnes, corporate tax partner at RSM UK, was sceptical. She said it remained to be seen whether this move would really happen as it was some years away.
Taxing capital gains
Much has been anticipated in terms of capital gains, some more frightful than others. In the end the chancellor opted for a more measured approach.
The anticipated alignment of CGT with income tax did not quite materialise and neither did punitive tax hikes for landlords (apart from one - more on that later).
Reeves did raise the lower CGT rate by a considerable 8 percentage points to 18 per cent and the higher rate from 20 per cent to 24 per cent.
But she did not raise the existing rates on the sale of residential property, currently 18 per cent and 28 per cent.
"The UK will still have the lowest capital gains tax rate of any European G7 economy," the chancellor said.
Rachael Griffin, tax and financial planning expert at Quilter, said raising CGT was not an effective way to raise more tax revenue because it often resulted in fewer people selling their assets.
However, she said the move to not align CGT with income tax rates was "perhaps an attempt to at least partially alleviate the issue of people sitting tight."
She added: "The changes today will impact on traditional financial planning techniques.
"Over the past few years, changes to the CGT landscape such as the significant reduction in the annual exempt amount coupled with cuts to the dividend allowance have drained the life out of general investment accounts and made Isas, due to their tax efficiency, even more important for all.
"Similarly, for those looking for simplicity in their tax reporting, onshore bonds have once again become a more useful 'tax wrapper'.
"In addition, higher rate and additional rate taxpayers may use an onshore bond to help shield income yields and investment gains from higher personal rates of tax on an arising basis."
Stamp duty on second homes
One of the steeper tax hikes was that on landlords who buy multiple properties.
Reeves chose to hike the stamp duty surcharge by an eyebrow raising 2 percentage points to 5 per cent, taking effect overnight, from 31 October.
Overall, there was a feeling among industry experts that it stung but could have been worse for landlords.
