The survey of over 2,000 workers shows a majority believe they work most efficiently between 6 a.m. and 3 p.m.
Only one in 20 said they are at their most productive state after 3 p.m.
Nearly half said they work best from home, which surveyor Your Communications argued could spell the death of the traditional 9 to 5 working day.
Allowing staff to work flexibly from home at hours best-suited to their capabilities, firms can dramatically boost their productivity, the business services firm said.
In addition, the report stated that flexible working schemes bring "obvious benefits" that employers must consider, such as strengthening staff loyalty and improving the work-life balance of their staff.