The term too early is always dependent on the individual and the company. What some companies consider too early for a raise might be normal for others. Similarly, if you think your performance is worth a raise within the first 5 months of joining a company then you can obviously go for it. Negotiating a pay-raise in 5 months is not quite a norm in majority of the companies, until and unless you have years of experience and outstanding performance to back your claim.
Majority of the companies around the globe think of giving a raise after an employee completes at least one year of dedicated service. However, the question of a raise can’t be rejected if the employee has performed exceptionally well and has managed to bring in huge business to the company. If you think that you are being paid lesser than colleagues working in your rank, you can always raise the issue with your HR.
In several companies, six months is considered to be the end of probation period and it’s better to wait out another month before you can actually raise the issue with your HR. As said earlier, getting a raise depends on the company policy, so you can’t ask for a rise in companies that follow a policy of not allowing a raise before an employee completes certain number of months in the company. There’s no point in arguing with your HR regarding a raise because you feel that you were handed a raw deal during your interview.
The best way to understand whether your company can actually give you a raise is to ask around and enquire a bit with your colleagues whether you can ask for a raise or not. A little survey in your office can clear the air for you and it will be easier for you decide whether you can get a pay hike in 5 months or not. Your colleagues will inform you if any such past raises have been offered to any employee or not. They will also inform you whether there has been any kind of feedback in your performance from the HR department or not.
Getting a raise is quite tough within the first few months if you haven’t performed exceptionally well and in fact have managed to catch the attention of your seniors. Only your seniors and the HR can decide on the raise so it’s better if you find ways to please them with your work and efficiency.