The head of the company usually negotiates his salary when he is incorporated, whenever there is a change in his responsibilities or in exigent circumstances of the business, or annually, that is to say, within the reasonable exercise of revisions. Your salary is based on the results of the company and the salary structure of the company if it is a large multinational. 
But in general, senior managers do not "ask for wage increases," in their most literal sense.

In the case of other average positions of the company may occur circumstances in which the level of responsibility and professional competence have become out of date about the market; This fact may lead to talk to the boss to request a review. In this line are our recommendations.

First, you must take into account the company's budget cycle, and when they are accustomed to considering wage revisions. This is important because if the boss has not budgeted for an increase, it can be tough, even if you consider it right, to get a review.

In other circumstances, the time to ask for a raise is the same as when you have been promoted, your responsibilities have increased, you have had significant success, or you have made any extraordinary and objectively recognized contribution.

You must take into account the culture of the company, it is something that every professional, and also, every manager should know. That means knowing the internal processes and ways of communication: who to address, how and when: in general, it is preferable to speak openly face to face with the boss, and request an interview with him specifying the reason for the "demand."

Among the arguments to be made, in addition to those already mentioned, you should include your contribution to the company, your degree of integration in it, the economic progress of the company, and that of the salary policy and structure compared to other professionals who Have a similar level of responsibility.

A good exercise can be to write a note about the reasons, contributions, and intentions, before having an interview with the boss: it will serve to clarify the ideas, to be able to expose them with order and not to forget any important point. Whether this note is a script for the interview or a memorandum is written, it will depend on the culture of the company, although in general, it is more convenient to do it face-to-face in a typical conversation between professionals.

Finally, assessing the economic value of promotion is complicated since remuneration typically depends on the contribution and level of responsibility of the person and therefore is a very relative value.

Threatening to leave the company to go to another and play with counter-offers: the decision to leave a business for economic reasons, which may be valid at any given time, should never result in the game of counter-offer.

Harmful attitudes:

• Press with another offer;
• Threatening to leave;
• Showing himself angry, grumpy, uncomfortable, annoying, discontented. Apart from being detrimental to the professional himself, he does not earn anything, but quite the opposite;
• Not having objective reasons, but asking for a salary increase without reasons;
• Yes, even if it's New Year! 

Here are some tips on humor.

• Eliminate the word salary of your speech, shriek less that of "improving our working relationship."
• Do not ask for a raise: it suggests "stay on the active line and work progress."
• Do not speak of yourself, but of the work of your boss: he will adore you for it.
• Study the humor of the boss and don't choose the moment in which you have just spent the expenses of the phone on talking to him.
• Take advantage of the path of your superiors and return them with a "to see if it's true that I'm so good."
• Never comment on your boss's family. No, not even good.

Wandering around the office wearing tattered trousers and a pitying face does not work, but you don't need to look more boss than the boss.

Don't walk your union card all over the office: if necessary, use it. No, only if it is necessary.

The gift to your partner is very seen, imaginative: Better your boss!

And the most important: "Boss, you and I deserve a raise, don't we?"