>>1784914>how much i should charge? does it depends on my skill? on the time taken?
Mainly skill; getting faster is also part of your skill set.
Whatever you charge, the one thing you want to do is make sure you're earning Minimum Wage*. If MW is $10/hr, and you charge $10 for a drawing, then be sure to finish each drawing in 1 hour or less.
It will take time and experience to work out your ideal rate. Do several pictures of varying types (eg sketch, lineart, full colour etc), and note down how long each one takes you. Use this in combination with an hourly rate as the basis for your calculations. Your initial hourly rate should not be less than MW for your area, preferably more than that. As you get better and faster you can raise your prices (but avoid lowering them).
It takes you 3 hours, on average, to make a full colour picture.
MinWage is $10/hr. You set your hourly rate at $15/hr.
You open commissions charging $45 for a full colour picture.
Your aim is to complete each picture in around 3 hours or less, and to not take more than 4.5 hours.
* Now, before any potential commissioners fly into a Capitalistic Apoplexy at this blatant Communism, "Earn Minimum Wage" is advice for artists, not commissioners. You will never know how long a particular picture took to make. One hour or two hours, 55 minutes or 65 minutes; it's irrelevant to you. All you need to concern yourself with as a Commissioner is that you get what you paid for, at the price you paid for it.