Not all are able to negotiate their Salary at various interview stages. So here's presenting Salary Negotiation Tips that will help you at various interview stages:
1) Do not mention your current salary or your expected salary range on the first call.
2) After you have received the offer, give your counter-offer
3) Prepare to bargain your salary with other factors such as flexible work hours, more vacation time, etc.
4) Be ready to get your annual raise which will be based on your accomplishments since your last decided salary and the current market value.
