The North Herefordshire MP Bill Wiggin has been criticised after taking on a second job for an offshore financial company.
The latest Register of Members' Interests has been released online in which MPs have to declare their earnings for taking on second jobs.
It shows Conservative Mr Wiggin is being paid about £19,000-a-year as the managing director of a Bermuda-based firm called Emerging Asset Management.
The company advises people on how they can launch new hedge funds in tax havens.
Hereford's Labour Party branch has called for him to quit the job, but Mr Wiggin insists that he has done nothing wrong.