How much to qoute for website coding in php?

You have to make some rules for you first very clear. For the web project you are looking you must consider the direct investment or the investment by you for third party. that can include the cost of payment gateway, hosting services etc second the software or addition tools you have to buy.. Dont just take the cost zero if you have them already because every tool has its cost and put it in your practice to divide that cost for different projects you are working. third your man power cost (that can be the cost of work hours. means the cost you decided for you per hour(rate) and multiply approximately by the expected time in completion.) and the cost of other indirect expenses like elecricity , machine depriciation(you can include this in your per hour rate for easy calculation.) communication complexity and frequency. as how much support you are getting from client side etc and how much commmunication like your phone bill for particular project. that can be an expected amount. add 25% additional for unnatural cost increments your cost should not be less then that. now you know what is the development cost almost. now add your percentage profit in it and then quote. now you know the limit. it seems to be a bit combursome but when you will do it , you will become habitual.