Research of 1,000 employees who regularly use taxis for work-related travel, found almost a quarter (23%) of respondents will routinely ask for a blank receipt so they can add a few extra pounds before submitting their expense claim.
One in ten (10%) admit going a step further and filling in claims for taxi journeys that have nothing whatsoever to do with work.
Shane Bruhns, Chief Operating Officer and Director of Spendvision, said: "Most UK employees are fundamentally honest, but the fact remains that taxi fares remain an easy target for the minority of employees who are open to temptation.
"A few pounds here or there might not seem like much to an individual, but if almost a third of your workforce is routinely adding £15-£20 a month to their expenses, the amount companies are losing quickly stacks up.
"The cash-based nature of taxi travel is clearly a weak link, leaving employers no choice but to put their faith in the honesty of their employees.
"From our research we found employees who regularly pay for taxi fares by card are half as likely to submit a false claim as those who pay with cash," Bruhns said.
Online survey of 1,000 adults who have taken a taxi for work purposes at least once in the past three months. The survey was carried out by OnePoll on behalf of Spendvision between 11th September and 14th September.
