In “Payable” you can see what sums are currently ready for payment.
Fees for jobs that you have processed on clickworker.com are often not immediately available for payment.
For quality assurance reasons this sometimes takes 7 days (21 days for UHRS jobs). However, the account balance is added immediately after you have saved a job. The account balance therefore always includes completed jobs that have not yet been paid, whereas “payable” only includes the sums that are at least 7 days old (UHRS: 21 days).