My employer pays my full VHI. They have been deducting a BIK from me for this. So it turns out that they calculated incorrectly and it is against the high rate of tax instead of the BIK rate. Now they have set it right but I am only able to claim back the last 4 years of adjustment from the tax office. I have asked payroll how did this happen and who is responsible for the issue. I got a reply stating that "The responsibility is on me to check my paycheck". Is this right. I rang citzens advice and they didn't have an answer for me also.