I–ii–iii–IV–V–I in B♭ Major

Pattern: I – ii – iii – IV – V – I Chords: B♭ – Cm – Dm – E♭ – F – B♭

Chord Breakdown

Numeral	Chord	Type	Function
I	B♭ (details)	major	Tonic
ii	Cm (details)	minor	Supertonic
iii	Dm (details)	minor	Mediant
IV	E♭ (details)	major	Subdominant
V	F (details)	major	Dominant
I	B♭ (details)	major	Tonic

Harmonic Analysis

This progression moves through B♭ (Tonic) → Cm (Supertonic) → Dm (Mediant) → E♭ (Subdominant) → F (Dominant) → B♭ (Tonic).

The I–ii–iii–IV–V–I progression ascends stepwise through the major scale's diatonic chords before cadencing home. This scalewise motion creates a sense of inevitable, building momentum toward the dominant resolution. It appears in classical themes and sophisticated pop arrangements.

Song Examples

Pachelbel's Canon (adapted) — Johann Pachelbel
Mr. Brightside (bridge) — The Killers

Chord Details

B♭ Cm Dm E♭ F

More Progressions in B♭ Major

I–IV–V–I I–V–vi–IV I–vi–IV–V ii–V–I I–IV–V I–♭VII–IV vi–IV–I–V I–V–vi–iii–IV–I–IV–V I–IV I–V IV–V IV–I