Hi there, Vanessa. The cost of adding a payroll product to your account will depend on the level of subscription you choose, since we have Payroll Core, Premium, and Elite.
For example, if you choose to add the Payroll Core, the original cost will be $50/month. Plus $6.50/employee per month. For more details, you can click this link: QuickBooks Payroll Plans and Pricing.
Just a heads up, the prices I shared might change based on any extra features or value-added stuff, as well as other economic factors.
If you have additional questions, please reply so we can assist you as soon as possible.