Spalletti has just led Napoli to the Serie A title for the first time since 1990 but there has been speculation about whether he would stay on.
Napoli owner Aurelio De Laurentiis had said on Sunday night that the coach had asked for a sabbatical and that he would not stand in his way and Spalletti confirmed the plan.
"Out of respect for the club I told De Laurentiis straightaway that I needed to take a year off," Italian news agency Ansa quoted Spalletti as saying on Monday.
"I'm a bit tired and want to spend time with my daughter Matilde," he added on the sidelines of a sports business conference.
Italian media speculated that former Spain national team coach Luis Enrique was the likely replacement for Spalletti. It was not clear what Spalletti would do after his break.
Napoli have run away with the Serie A title this season, upstaging their rivals from the wealthier north to win the league for the first time since the Diego Maradona era.
"Spalletti has been a really great coach, he's a free man, he's given a lot, I thank him and now it's right that he does what he wants to," De Laurentiis told a talk show on Rai TV on Sunday night.
Spalletti, who took charge of Napoli in 2021, had broken down in tears when Napoli clinched the title this month, paying tribute to his family and his brother who passed away four years ago.