Immigration Health Surcharge calculations PBS Dependent Application

[tej_san]

Home Office adds 14 days of grace period from your end date mentioned on CoS while granting Tier 2 General visa.

Now, when my dependent is trying to calculate Immigration Health Surcharge, it asks for visa end date which is little over 5 years and the system charges additional GBP 100 for 14 days.

However, the main applicant paid only GBP 1000 for 5 years visa, but the Home Office granted 14 days grace period.

How to avoid paying extra IHS for 14 days! If my dependent decides to delay applying the visa, there are chances that the IHS may get doubled (date not known yet, but any time in December!).

It's a tricky situation, can someone assist me here?