# Publish a batch of HITs


Publishing your HITs on the [Amazon Mechanical Turk web page](https://www.mturk.com/mturk/findhits) provides Workers with the opportunity to work on them. If your project template contains variables, you must upload the `.csv` data file that supplies the values for the variables in each HIT before you can publish your batch of HITs.



The following procedure describes how to publish an Amazon Mechanical Turk batch using an existing project.

**To publish a batch**

1. Sign in to the Amazon Mechanical Turk Requester website at [https://requester.mturk.com/](https://requester.mturk.com/).

1. Choose the **Create** tab and then choose **New Batch with an Existing Project**. 

1. Under **Start a New Batch with an Existing Project**, choose **Publish Batch** to publish the batch for your project. If you want to make edits to your project before publishing a new batch, click **Edit** to make changes to the HIT properties or design layout. 

1. If your project template contains variables, choose a `.csv` file to upload. In **Publish Batch**, choose **Choose File** to locate the `.csv` data file and then choose **Upload**.

1. After you upload your file, choose **Next** to preview your HITs to see how they'll appear to Workers. 

1. On the **Preview HITs** page, carefully review your HITs and correct mistakes before publishing. For example, make sure that any variables in the HIT are correctly replaced by your input data. Choose **Next HIT** to preview the next HIT. You can preview up to 200 HITs in your data file. 

1. After you finish reviewing your HITs, choose **Next**.

1. Review the information on the **Confirm and Publish Batch** page, which shows the total amount you will pay Workers and Mechanical Turk Mechanical Turk if you approve all of the assignments. The following table explains the sections of the **Confirm and Publish Batch** page.    
[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/AWSMechTurk/latest/RequesterUI/PublishingYourBatchofHITs.html)

1. If you haven't already entered a payment method, enter it in **Payment Method**.

1. Choose **Purchase & Publish** to publish the batch of HITs.

After your batch has been published, you can track its progress in the **Manage** section of the Mechanical Turk Requester console. For more information about managing batches, see [Manage batches](ManagingYourHITs.md).