Click the Upgrade button under the course on your edX dashboard.
You can also find the Upgrade button on the right side of the course homepage inside of the course to access the checkout page.
Note: If these buttons aren't available, then the upgrade deadline of your course has already passed or this course does not offer certificates.
Unless otherwise provided for in these Terms, all fees will be charged in the available currency selected at checkout. Fees are non-refundable, except as provided by our Refund Policy or as required by law.
Can I start for free and pay later?