1. Log in to your Skype account at Skype.com. The site will ask you for your username and password.
2. Go to the "Subscription settings" link on the right side and click it.
3. Click on the "Cancel subscription" link on the left side of the page. On the next screen, the system will ask you whether you are sure that you want to cancel your subscription. Click the "Yes" button. You will be prompted through the final steps.