Re: Shouldn\'t be a problem.
First, the consular officer is only concerned about your *future* salary, i.e., salary that the sponsoring company will pay you after you immigrate. If your HR can provide you with an employment letter that indicates their willingness to pay you the LC salary after you immigrate, then you don’t have a problem at all. Even if they provide a letter that includes total compensation (i.e., items over and above base salary) that exceeds your LC salary, you should be safe.
In principle, since the offer is for future employment, your current employment status should be of no consequence at all. In fact, you are not even required to be employed by the company that is sponsoring your immigration. However, if you are, a consular officer may choose to evaluate the likelihood of your getting the job and salary as per your offer of employment. By reviewing your recent pay-stubs, the officer can ascertain if you are still gainfully employed at the firm (i.e., you were not impacted by layoffs, etc., something that can undermine a future offer), and your current salary is close to what was stated in LC (i.e., the company won’t have to give you an unrealistic raise to meet the LC requirement).
How low can your current salary be? Unfortunately, there is no universally accepted differential. Although no one has reported a CP rejection on account of lower current salary, absence of evidence is not evidence of absence. Purists claim that as long as your salary is over the “prevailing wages”, you should not have a problem. Others claim a difference less than 5% is inconsequential. Some have even reported success with differences of about 20%. I successfully consular processed in Montreal with a salary difference of 3%. You may dig up old posts to get more data points.
Good luck.