It has been suggested common schools might have something to learn from spiritual education in Steiner schools. This arguably assumes practice in Steiner schools to be compatible with the aims of spiritual education in common schools. I question this by considering whether the former is confessional, as the latter should not be. I begin by highlighting how my concern about the potentially confessional nature of Steiner spiritual education arose. I argue for a nuanced understanding of confessional education, which distinguishes between 'weak' and 'strong' confessional education, as well as between confessional education as intentional and as defined by outcome. I then argue that spiritual education in common schools should prepare pupils for spirituality, without being confessional. I consider whether Steiner schools are confessional by drawing upon findings from research conducted at six Steiner schools. I conclude that spiritual education in Steiner schools is weakly confessional in an intentional sense. I further conclude that practices which might contribute to preparation for spirituality and which can be implemented in a non-confessional manner are worthy of consideration for transfer to common schools. Common schools committed to preparation for spirituality as an educational aim could learn from spiritual education in Steiner schools.