When you setup an MTurk Toolkit study, there is a feasibility calculator on the Panel Options tab you can use to estimate the cost and likelihood of reaching your desired sample.
Once you begin selecting demographic characteristics for your sample, the feasibility calculator will estimate the cost. Panel costs range from .15 to .75 cents per participant, depending on how difficult it is to reach people with the demographic characteristics you select. Furthermore, Panel costs are in addition to whatever you pay workers, the MTurk fees associated with your study, and the CloudResearch Lab Fees for things like Pro Features.
Some Studies are Unfeasible
In addition to calculating cost, the feasibility calculator assesses the likelihood that you will be able to reach your desired sample size, given the Panel Options you select. If the panel you are trying to recruit is not feasible, you will receive a message that your study may not reach the number of participants you desire.
When you receive this message you can: a) proceed anyway, launching your study to see if you can collect enough participants, or b) contact our customer service to receive a quote for what it would cost to guarantee you reach your desired sample.
Note: If you launch the study on your own, there is a limit to the maximum number of times you can restart your study.