yes, there is an option for "make partial payment" and you choose the amount. Be careful though, I accidently paid the entire balance when there was an error the first time, it redirected me to the page with all of what I thought was the same info filled out the second time except for my credit card # (which I must have typed in wrong the 1st time) and it defaulted back to "pay entire balance" which I didn't notice...I've made several "partial" payments though...good news is my trip is paid off, bad news is is money is gonne be a little tight this week!!