The salt formed when hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH) is sodium chloride (NaCl).

Here's the balanced chemical equation for the reaction:

HCl (aq) + NaOH (aq) → NaCl (aq) + H₂O (l)

This is a neutralization reaction where an acid and a base react to form salt and water.