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Dominant 7th ♭9 Chords on Piano

The dominant 7th ♭9 chord adds a minor ninth to a dominant 7th, creating an intense, dark, and dissonant tension chord that resolves powerfully to minor keys. It is the quintessential "altered dominant" sound in jazz — the chord that makes a V–i resolution feel urgent and dramatic.

Formula: Root – Major 3rd – Perfect 5th – Minor 7th – Minor 9th
Scale degrees: 1–3–5–♭7–♭9
Sound: Dark, tense, dramatic, jazz
Symbol: 7♭9 (C7♭9)

The minor-key resolution chord: When you see a V chord resolving to a minor tonic (like G7 → Cm), the 7♭9 is almost always a stronger choice than a plain dominant 7th. The ♭9 (A♭ in G7♭9) is already a note in C minor, so it connects the dominant chord more tightly to the key it resolves to.

Dominant 7th ♭9 Chord in All 18 Keys

C Dominant 7th ♭9 Chord
C# Dominant 7th ♭9 Chord
Db Dominant 7th ♭9 Chord
D Dominant 7th ♭9 Chord
D# Dominant 7th ♭9 Chord
Eb Dominant 7th ♭9 Chord
E Dominant 7th ♭9 Chord
F Dominant 7th ♭9 Chord
F# Dominant 7th ♭9 Chord
Gb Dominant 7th ♭9 Chord
G Dominant 7th ♭9 Chord
G# Dominant 7th ♭9 Chord
Ab Dominant 7th ♭9 Chord
A Dominant 7th ♭9 Chord
A# Dominant 7th ♭9 Chord
Bb Dominant 7th ♭9 Chord
B Dominant 7th ♭9 Chord
Cb Dominant 7th ♭9 Chord