One question posted by many that can have many different answers. It’s true that for this there is no ultimate truth, many countries have different rates.

What I could do for you would be to give you some hints of the points to take in consideration when taking this decision:

Your reputation as designer, we know that if many people have recommended you, the customer will be willing to pay a good amount of money for your design

Remind the customer this is a good investment, some might think you’re charging too much money for it. Remind your customer that this will give his/her company a global presentation, which is really important for international customers.

Take in consideration the time it took you to create the page, every customer is different and they all want something special and different

Stipulate the time it might take you to create the site, some customers are easier than others. Gas is very expensive, so keep in mind all the little things it took you for your design to happen.

Maintenance, maybe the most important thing, don’t be one of those designers that disappears after the design is completed.