Income from savings

For PAYE I understand monthly interest from savings accounts are paid gross and notified to HMRC for adjustment of tax code. What happens if the amount exceeds personal income tax allowance?

Hi

If above the personal allowance then your tax code will be updated to include the taxable element. 

Thank you

When the tax code changes, when will money go out of my account ? I had more accounts, will each account be charged with the corresponding tax? What if I have no money left in that account?

Hi claliamin XXX,
When your tax code changes, any tax owed will be deducted from your wages by your employer. 
Thank you.