Planas scored his first senior goal on 12 March 2017, the equalizer in a 2–2 away draw against Martos CD. On 13 July, he signed a one-year contract with UE Sant Andreu, also in the fourth division.[4]
On 21 June 2018, Planas signed for CF Reus Deportiu and was initially assigned to the B team in the fourth division.[5] He made his first-team debut on 19 August, starting in a 0–2 away loss against UD Las Palmas.[6]
Planas scored his first professional goal on 15 September 2018, the only goal in an away defeat of CD Tenerife.[7] In January 2019, as the club's financial situation worsened, he terminated his contract.
On 29 January 2019, Planas signed a two-and-a-half-year contract with AD Alcorcón, and was immediately loaned to fellow second division side Elche CF until June.[8] On 12 July, he moved to Segunda División B side Valencia CF Mestalla also in a temporary deal.[9]
On 17 August 2020, Planas agreed to a one-year deal with Marbella FC in division three, after terminating his contract with the Alfareros.[10]
