Phone Expense Claims vs Centralised Business Billing

Comparing phone expense claims vs centralised billing: claims and allowances hide the true cost of business calls and data. Centralised billing gives one invoice with itemised business only usage.
What is wrong with expense claims?
Costs are scattered across claims or buried in payroll, and finance only sees them after the fact.
How does centralised billing work?
Every ZIM business line sits on the company account. You see itemised usage on the business line and nothing from the employee’s personal line.

