Format kompetisi Liga 1 menggunakan format satu wilayah di mana sebelumnya (terakhir 2007) menggunakan format dua wilayah. Pemenang akan ditentukan dari jumlah poin paling banyak selama 34 pertandingan. Gelar juara ditentukan oleh tim dengan poin tertinggi selama satu musim kompetisi, jika poin sama maka juara akan ditentukan dengan selisih gol. Juara akan mewakili Indonesia di play-off Liga Champions Asia. Sedangkan peringkat ke-2 dan ke-3 (jika peringkat ke-1 lolos play-off Liga Champions Asia) akan mewakili Indonesia di Piala AFC. Tiga tim penghuni terbawah klasemen akan langsung terdegradasi dan digantikan oleh tiga tim terbaik dari Liga 2 yang promosi.
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