Job vacancies have fallen to the lowest level in nearly four years, suggesting demand for workers is weakening as employment costs grow.
The number of jobs on offer fell to 781,000 in the first three months of the year, the Office for National Statistics (ONS) said, while payroll numbers also declined.
Average UK pay continued to rise - up 5.9% - but increases in employer National Insurance Contributions as well as National Minimum Wage hikes which came into force this month are forecast to weigh on salaries.
"The looming hike in employers' taxes in April is very likely to have persuaded employers to hold back on hiring," said Sarah Coles, head of personal finance at Hargreaves Lansdown.