Average Hourly Cost: The average hourly cost for bathtub installation by a plumber is around $80-$150 per hour. This cost may vary depending on the complexity of the job and the type and quality of the accessory.

Cost Breakdown: The cost of bathtub installation may include the cost of the bathtub, the cost of any additional plumbing parts, the cost of labor, and the cost of any additional materials. The cost of labor typically includes the plumber's time to measure, cut, and install the bathtub and any additional plumbing parts.

Factors Affecting Cost: Several factors may affect the total cost of bathtub installation. These include the type and quality of the accessory, the complexity of the job, and the location and service provider. A more complex job will require more time and materials, thus increasing the cost. The type and quality of the accessory may also affect the total cost, as higher quality materials may cost more. Additionally, the location and service provider may also affect the cost, as service providers in more expensive areas may charge more.