The majority of firms that use agency workers have maintained or increased their use in the last 5 years, according to research.
A survey by the Resolution Foundation of 500 firms found that 43% had increased their share of agency workers since 2012, and 46% had kept it the same.
In comparison, only 9% decreased their use of agency workers during that time.
Construction firms were the most likely to have increased their agency worker share (56%).
This was followed by wholesale, retail and motor trade businesses (51%), and administration, professional and real estate industries (47%).
Demand looks set to continue, as 55% expect their use of agency workers to stay the same over the next 5 years, and 25% plan to increase it.
However, recent estimates from the ONS suggest a decline in the agency workforce, which dropped by about 11,000 workers from 2016 to 2017.
Lindsay Judge, senior policy analyst at the Resolution Foundation, said:
“Demand for agency workers grew significantly over the last 5 years – particularly among firms who use them as a core part of their business model and have become agency worker reliant.
“But with the latest data suggesting the growth in agency workers has tailed off, such businesses may find that they have to rethink their plans.”