This part of GOV.UK is being rebuilt – find out what beta means

HMRC internal manual

Tax Credits Manual

Eligibility - remunerative work (general): New jobs (Info)

If the customer has started, or is expected to start, a new job then the hours worked should be based on those that the new employer expects them to work.

You should accept the hours that the customer states they are expected to work.

If the hours worked are expected to fluctuate, the customer should provide the hours they’re normally expected to work.