If the company provides daily allowance for the Business Travel based on the city then this 'Daily Allowance Rate' page  can be used to manage the allowance.

Expense Claim -> Settings -> Daily Allowance Rate

 'Daily Allowance Rate' page  provides facility to manage the City Wise Daily Allowance. Admin user can set the allowance currency wise amount for the applicable grades in the grade profile. The allowance currency dropdown values binding based on the mapping done in country master.