Alimony, bariometer for "substantially dependent"

Wife and I are separating and probably working out an agreement. I’m not sure if I should offer, or if she is entitled to alimony. Assuming no marital fault can be proven, if she makes 45% of the household income can she be “substantially dependent”. I’m basically asking what qualifies as substantially dependent in NC. I net around $500 more per month than her. We will both be under a lot of financial distress after separation because of debt.

Based on those limited facts, this does not sound like an alimony case to me.