Increasing your base salary may not be the only way to increase your income. Find out about all the incentives your company has to offer. Be sensitive to the timing. If your boss is in a great mood, go for it. If not, wait.
Most companies have a salary range structure for each position.
Find out what your job's salary range is and where you fall in that range. Salary ranges usually overlap between junior and senior positions. You may need a promotion to get the compensation you deserve. If you must obtain a promotion to get your desired salary, find out what you need to do, or if an exception would be made in your case. The amount of a salary increase usually is based on where you fall in the market comparison, along with your significant contributions to the bottom line of the company.