The main cost associated with WordPress is hosting, which starts at around $3.95/month. Other common costs include domains, themes, and plugins. Realistically, WordPress pricing falls between $11 and $40 per month, after a one-off cost of $200.
Depending on your needs, your cost to start a WordPress website can range from $100 to $500 to $3000, to even as high as $30,000 or more. It's important to know what type of website you are building, and what you'll need for it because that will directly affect your cost.