Should all travel claims for staff members be included on payslips and on their IRP5?

Yes, depending on the nature of the travel claim, for those taxpayers not receiving a travel allowance and claiming back at the SARS rate and travelling less than 8000km per year the source code used is 3703 and for those travelling more than 8000km or at a rate greater than the SARS allowable rate use source code 3702.