5 minute Offset from Web clock

Summary

my client wants to add % minutes to the time clocked using web clock

Content

Dear experts

My client has a requirement to add 5 minutes to the clock when entering time using the Web Clock. Their logic is that it takes an employee 5 minutes from the time he enters the building to the time he switches on his laptop and is able to clock in in the the Web clock.

Is it possible to achieve this within the web clock setup? 

I have not yet tried but I am quite sure that it would be possible to achieve it in the timesheet.