How is interest taxed if I pay into a pension so my income is decreased?

2 case questions here I earn £55k I put it all into pension Do I Get all my tax back that I paid over my personal allowance? Do I get tax added to what I put in below my personal allowance Can I then earn the following interest from savings tax free £5,000 £12,570 personal allowance Total £17,570 Wife earns £10,000 Puts 8k into pension and gets 2k added? Can she then earn £17,570 in interest tax free?

Customer name amdt email removed admin .

Hi mooeyp,
No, you would not get all the tax back you paid.
You would get relief on your pension contributions but only on the amount that you are in the higher rate tax band.
No, you would not get your interest tax free.
If your wife's only income is the £10K then yes she would receive the starting rate for savings.
You can find out more here:
Tax on savings interest
Thank you.