C#sus4 Chord on Guitar
C#sus4 = C# – F# – G# (Root, Perfect 4th, Perfect 5th)
C#sus4 swaps the third for a perfect fourth, and unlike sus2's open ambiguity, this one has genuine forward momentum — the ear hears an unresolved note actively straining to fall. At the ninth fret, the shape barely moves from the plain C# major triad sitting at the same position, which makes the classic sus4-to-major resolution an especially quick, cheap move to execute this high on the neck.
The notes are C#, F#, and G# — root, fourth, fifth — and because the fourth sits only a half step above where the major third would fall, it reads as a note under tension rather than a settled tone in its own right. That's the entire mechanism behind the classic move: strum C#sus4, then slide the fretting finger down a single fret to land on plain C# major, and the ear perceives real resolution even though almost nothing about the chord's structure has changed.
Fingerings
Barre (9th fret)
How to Practice It
Because this shape usually only asks one finger to move one fret from the plain major triad, it's one of the easiest embellishments on the neck to add convincingly, even at a fret position where spacing is tighter than lower down. The real skill worth practicing is timing — strumming the sus4 slightly ahead of the beat and resolving to the major chord right on the downbeat is what makes the technique sound musical rather than accidental.
Common Progressions
- C#sus4 – C# – F# (the classic sus4-to-major resolution before moving on)
- C# – C#sus4 – C# – F# (a rhythm-guitar embellishment pattern)
- C#sus4 – C# – G# – A#m (a pop progression using sus4 as a pickup color)
- F# – C#sus4 – C# (IV – Isus4 – I)
FAQ
- Why does C#sus4 feel unresolved compared to C#sus2?
- The fourth sits only a half step above where the major third would land, so it reads as a note straining toward that nearby resolution, while sus2's second sits further away and feels more like open ambiguity than active pull.
- What's the standard technique for using C#sus4?
- Strum the sus4 chord, then slide the fretting finger down one fret to land on plain C# major — a cheap, effective embellishment used constantly across rock, country, and pop rhythm guitar.
- Is C#sus4 easier to finger than C#sus2 at this position?
- Yes, noticeably — sus4 usually moves just one finger one fret from the plain major shape, while sus2 demands a genuinely wider stretch, making sus4 the more approachable of the two suspensions here.
- Does C#sus4 ever stay unresolved in a progression?
- Less often than sus2, since its pull toward resolution is strong enough that leaving it hanging tends to sound like an interrupted phrase rather than a deliberate color choice.
- What single note separates C# major from C#sus4?
- Only the third versus the fourth — F# replaces F, a single half-step shift that's enough to completely change the chord's character from settled to expectant.
- Is there a lower-position alternative to this ninth-fret sus4?
- Yes — a partial voicing built from an open-adjacent A-shape template reaches the same pitch collection several frets lower, which is generally the version beginners learn first.
- Can C#sus4 be strummed as a rhythm pattern rather than a one-off embellishment?
- Yes — some rock rhythm parts alternate between the sus4 and major versions of a chord on successive strums throughout an entire section, turning the resolution into a repeating rhythmic hook rather than a single decorative moment.
C#sus4 on other instruments: C#sus4 on Piano, C#sus4 on Ukulele. Related: how chords are built, chord finder.