Working Tax Credits and premium bond winnings

[Jampot]

Do i have to tell Working Tax credit people about a premium bond win more than £300? the winnings are tax free and i dont have to declare it to inland revenue on my tax return.

In addition do i declare ISAs and things?

bump

If it is over £300 as it is classed as income.

I have just found out that I should have also been declairing my pension - have not been and they have therefore paid me to little. Nothing I can do about previous years but I will now start declairing