<p>My d borrowed 2625 and 3500 for the first two years of her stafford unsub. The payments (AES) are quarterly, the one due in March was $101 and in June it was $108. Obviously the more she borrows the more it goes up, so currently just interest is around $400 per year. This year she is borrowing $5500 so I expect it to rise substantially. But better paying the interest than letting it build up.</p>