My bill

[Imgroot]

Why is my first bill  £35 instead of  £28 and whys it due 12 days after the Internet was first installed which was the 17th April 

[Arne-TalkTalk]

Hi Imgroot

The increase is because of charges since your service started on the 14th April, till your first bill on the 25th totaling £7.37 + month ahead £28 

Regards

[Gliwmaeden2]

It's simply establishing a billing cycle, @Imgroot.

You are paying for the NEXT month PLUS THE DAYS OF SERVICE UP TO the date they made up the bill.

All should be clear if you take a look in the details in My Account. 

Also here:

https://community.talktalk.co.uk/t5/Articles/Your-first-bill/ta-p/2204666