Does rent from Primary Residence reduce my Debt to Income ratio

[Oluseye Faleye]

I have been a member of Biggerpockets for a while and absorbing as much knowledge through the forums and experienced members. I currently have 2 rentals and a high priced primary.

I am currently trying to increase my rental portfolio by buying foreclosures but i might be limited to loans due to my loan on my primary residence.

Can i rent out my primary residence and use the income to reduce my debt to income ratio so i can obtain additional loans for rental property. And will i need to reduce my primary residence mortgage to 75% LTV before the rental income can count.