You are only worth what someone else is willing to pay you. If you feel you're underpaid, your two options are to find someone who values your work more, or co

You are only worth what someone else is willing to pay you. If you feel you're underpaid, your two options are to find someone who values your work more, or convince your current employer that you're more valuable than he's giving you credit for. That said, it seems you are being wildly underpaid. It would be pretty easy for you to find another web development job and double your salary, plus benefits. Your current boss is unlikely to double your pay, so you may still come away underpaid even if he gives you a significant increase.