I agree WILLIAMR, unless all the benefits calculators are wrong and I have tried everyone I could find, a private pension doesn't impact on Carers Allowance, at least if you are below state pension age. I haven't tried all the variables possible.Only state pension will stop you getting carers allowance.
I know somebody who got it even though his occupational pension was in excess of £30k a year.
He was not of state pension age at that point.
He did however have to pay tax on the carers allowance.
Oh and I don't get £100,000 pension, I just kept upping the number in the benefits calculator to try and find a ceiling. I gave up at that figure.