Wages should go up around 4-5% a year so figure out what is appropriate using that sort of math. You're also in a negotiation - so have your 'ideal' number as a backup, not your first offer. Hell, ask for as high as 10% if you think you're worth it.
As well, have a ready justification of what you have done to earn this raise, and how you plan to improve over the next year. Have solid, definable goals.
if u already have a understanding with your company that u are deserving of a raise then u should just be able to walk in and finalise that understanding
the important thing is to make a modest request because while u may be indispensible right now just remember that u learned the job and so can someone else if your demands are unreasonable
Research what people doing similar jobs in your geographical are being paid if you have not yet done so, then make your request commensurate. From the sounds of it you could ask for the higher end of the salary range, but not if it's a huge jump from what they are already paying you.
That is a huge jump for the company to cover. Have you been able to find out how profitable your company has been in the past couple of years and what their projection is for next year? I'd consider those aspects, too, in regards to how much of an increase to ask for.
And of course how readily do you believe you will be able to find work elsewhere, i.e., how much of a gamble are you taking and how much of a gamble are you comfortable taking?
Sounds to me like the 50% is a good request then, though I do want to give the disclaimer that this is not my area of expertise.
And good luck to you!
Dont take no for an answer
Bless your soul