Within Teamwork Projects, you can subscribe directly within your site settings via credit card, however if you'd like to pay by bank transfer, this option is available for annual subscriptions.

Please contact support@teamwork.com with the following details:

Organisation Name:
Tax Number (for customers within the EU):
Are you a Non for profit or Educational Institution?: 
Street Address:
Town / City:
County / State:

Post / ZIP Code:

Teamwork Account URL: Usually in the format of 'yourcompany.teamwork.com'
Required Teamwork Projects Plan: For example 'Small Office'  or 'Professional'
Your Contact Name & Email:
Your Billing Name & Email (if different):

For more information see: Subscribing to a Teamwork Projects plan