Half of all workers owed expenses are not claiming them because automated systems are too complicated.
A survey of 1,000 public and private sector workers found that over 50% of workers who use their own money to pay for work-related costs don't claim the money back because the process is too complex.
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The survey, carried out by OnePoll, also revealed 55% of companies still use paper-based expenses claim systems.
Shane Bruhns, COO at Spendvision, said automated systems can make life easier for employees and help the business at the same time.
"The results show that many employees don't get around to claiming all their expenses - even though they often pay for things with their own money instead of company cash - because their current claims process is far too complicated and time-consuming," said Bruhns.
"Too many employers are still expecting their staff to foot the bill for company expenses," added Bruhns.
"Having to wait so long to be paid back for business-related transactions can be extremely demoralising to a workforce, especially given the harsh economic climate. While it might appear to be beneficial to organisations to delay the remittance of expenses, the inefficiency of their claims process can actually be costing them more than they save."