  In this paper we are going to review the latest estimates for the particle
background expected on the X-IFU instrument onboard of the ATHENA mission. The
particle background is induced by two different particle populations: the so
called "soft protons" and the Cosmic rays. The first component is composed of
low energy particles (< 100s keV) that get funnelled by the mirrors towards the
focal plane, losing part of their energy inside the filters and inducing
background counts inside the instrument sensitivity band. The latter component
is induced by high energy particles (> 100 MeV) that possess enough energy to
cross the spacecraft and reach the detector from any direction, depositing a
small fraction of their energy inside the instrument. Both these components are
estimated using Monte Carlo simulations and the latest results are presented
here.
