If I transfer a domain name to a webhosting site, will I still have to pay where I got the original domain?

I plan to start up a website and have it ready in 3-5 months. I want to reserve the domain name now by purchasing it through Yahoo -- right now, it's $1.99 for the first year. I want to transfer the domain name to hostmonster.com after I get the site ready. Will I

Hostgator coupon ...