As of January 2016, TataSky HD basic STB costs ₹1800/-, which includes standard installation.
- 10mtrs of cable
- 1080i capable HD Set-Top-Box.
There is nothing called HD pack in TataSky, where you get all the HD (high-definition) channels. To start viewing HD channels, you need to pay monthly HD-Activation fee of ₹175. Once you activate this, you will get view the channels that you have already subscribed to in your base-pack. DO NOT ASSUME YOU WILL GET ALL HD CHANNELS.
So, this is like, paying ₹2100 extra per year only to enable HD content that you have already paid for to view in SD.
In summary, your monthly recurring cost is ₹175 per month.
Refer to official description here: http://www.tatasky.com/wps/portal/TataSky/product/tataskyhd