The cost to install a new toilet can vary depending on various factors such as your location, the complexity of the installation, and whether any additional plumbing work is required. On average, you can expect to pay anywhere from $150 to $500 for professional installation.

In some cases, this price may include the cost of the toilet itself, but it's important to clarify this with the plumber  beforehand. If you're purchasing the toilet separately, make sure to factor in the cost of the toilet itself, which can range from $100 to $500 or more depending on the brand, features, and quality.

Keep in mind that these are just rough estimates, and prices can vary. It's always a good idea to get quote from plumbers  in your area to compare prices and find the best deal. Additionally, consider the reputation and qualifications of the plumber to ensure a professional installation.