Sin pagar renta is a clever phrase that literally means "without paying rent". It's the central metaphor of the song and a very modern way to talk about a breakup.
In the song, Xavi describes how the memories of his ex-lover continue to occupy his mind against his will. He sings that they "viven en mi mente sin pagar renta" (live in my mind without paying rent), creating a powerful and relatable image of thoughts that are like unwanted tenants you just can't evict.
Have you ever had an ex who refuses to leave your head? In "Sin Pagar Renta", Mexican artist Xavi turns that exact frustration into a classic regional Mexican breakup track. He admits his ex changed his whole view on love, claiming, "Llenaste el vacío que nadie llenó" ("You filled the void nobody else filled"). His brain knows the relationship is over ("Yo entiendo que todo esto se acabó" / "I understand that all of this is over"), but his heart refuses to listen.
The standout hook comes from a clever everyday phrase: "viven en mi mente sin pagar renta" ("they live in my mind without paying rent"). English speakers use the exact same idiom when something lives in your head "rent-free"—you cannot stop obsessing over it, even though it costs you your peace of mind. He wishes he could wipe the slate clean, but with no other choice ("No me queda de otra"), he has to put up with those stubborn memories crashing in his thoughts.