We all know that Goddess lakshmi is the lord of Wealth. Lord Kubera is also the lord of Wealth who blesses his devotees with enormous wealth. Kubera was rewarded by Lord shiva with the post of being one of the guards of the eight directions the North and made him the lord of wealth and material. As the god of wealth and material, his responsibilities are to distribute them, while creating wealth rest with Goddess Lakshmi.
Performing pooja to Lord Kubera is believed to enrich one's life. To have a wealthy and comfortable life, one has to perform Sri lakshmi Kubera pooja especially during Deepavali festival days (Amavasya day).
Sri lakshmi Kubera Yantram is worshipped for "Aishwarya Abhivridhi" which means toattain wealth and prosperity.