amit nyer a réven, elveszti a vámon

Etymology
, literally, "whatever one gains at the toll, one loses it at the customs."

Phrase

 * 1) what you lose on the swings you gain on the roundabouts, swings and roundabouts

Conjugation

 * Amit, a réven, a vámon remain unchanged.
 * and may be used in any person and in any time depending on who the phrase is applied to, and elveszti may occur with the potential suffix.