In my view there is no need to give 30 min buffer , 1st you have to remove it, because sometimes employees take unwanted advantages for the liberality of policies. lets take a example if someone is coming on every other day by 25-29 min late , but he/she would not be come in late comers and not count as red, they easily can save their leave balance as well. up to 5-15 min relaxation can be justified for a limit like 3 -4 , afterwards every single late should be count as an absent or half day . you should also take care about the honest and hard working employees those can be late due to some issue or emergency but depute long hours in office to complete the task on time.
Making a policy can be helpful for you.
From India, Delhi
Dear Employees ,
It has been observed that many employees are coming to work late in the morning. Everyone is required to be in office before the office start time.
The office timings are from 10.00 a.m. to 7.00 p.m. from Monday to Saturday. Lunch Hour shall be 45 Mins.
If an employee is running late, he/she needs to inform the HR.
Employees will be allowed to report to duty 10-15 mins late 2 to 3 times in a month, though do not make it a practice.
This Attendance practice will be tracked on a monthly bases & if still there is a late coming practice by the employees,strict disciplinary action will be taken.
3 times late punch: Acceptable
4th time late Punch: Marked Red & treat it as a warning
5th time or more : 1/2 day salary Deduction
Punctuality & Time Management are part of the organisation Culture.
Kindly Co operate and be punctual for the advancement and progress of our organisation.
From India, Ahmedabad