An open string left ringing against a fretted grip. Because it costs no finger, it sounds a note the closed shape has none left for -- a tension on top, or a pedal root underneath. Either a familiar grip with open strings added, or a shape so sparse the open strings carry the chord. These belong to their key rather than to a shape, so D, A, G and E have many and Eb a handful.
Bsus4 is B, E and F# — B with the third replaced by the fourth.
It sounds suspended mid-air. Played before the plain chord it is the oldest tension-and-release move there is.

| B | E | F# |
|---|---|---|
| 1 | 4 | 5 |
Suspended — classically it resolves down onto the third.
Also written Bsus or B suspended 4th. The same chord either way; which spelling you meet depends on who wrote the chart.
An open string left ringing against a fretted grip. It costs no finger, so it can sound a note the closed shape has none left for: a tension on top, or a pedal root underneath.
These belong to their key rather than to a shape: they cannot be moved up the neck. D, A, G and E have many; E♭ has a handful.
Bsus4 has 2 of them, on the top four strings and strings 6-4-3-2, all of them at the 4th fret — every inversion the chord has: E in the bass and F# in the bass. The one to learn first is the F# shape at the 4th fret, which is the easiest grip here.
Start with xx4457 — no barre and low, at the 4th fret. None of the shapes for Bsus4 uses an open string, so every one of them is movable; the lowest sits at the 2nd fret. 1 of the 6 needs a barre. Together they cover the neck from the 2nd fret to the 14th.
| Frets | Where | Bass | Top | Hand |
|---|---|---|---|---|
| x24452 | 2nd fret | B, root position | F# | all fretted |
| 7x4457 | 4th fret | B, root position | B | all fretted |
| xx4457 | 4th fret | F#, 2nd inversion | B | all fretted |
| 799977 | 7th fret | B, root position | B | barred |
| x-x-9-11-12-12 | 9th fret | B, root position | E | all fretted |
| x-14-14-11-12-x | 11th fret | B, root position | B | all fretted |
The same notes rebuilt from scratch give 47 triad voicings, each on its own page.
Voice by voice, Bsus4 → B. One voice moves by a semitone, and 2 notes are common to both chords.
| In Bsus4 | Moves | In B |
|---|---|---|
| B, the root | stays where it is | B, the root |
| E, the fourth | falls a semitone | D#, the major third |
| F#, the fifth | stays where it is | F#, the fifth |
In which keys. Every note of Bsus4 belongs to C# minor (the ♭VII), D major (the vi), E major (the V), E minor (the v), F# minor (the iv), G major (the iii), Ab minor (the ♭III), A major (the ii), B major (the I) and B minor (the i).
Every note of Bsus4 is in B minor pentatonic, B blues, B major, B mixolydian and B dorian.
Change one note of Bsus4 and you have B (the fourth becomes a major third), Bm (the fourth becomes a minor third), Bsus2 (the fourth becomes a ninth), Bsus2sus4 (add the ninth), B5 (drop the fourth) or B7sus4 (add the flat seventh).
Bsus4 is a suspended chord — root and fifth, with a second or fourth where the third would be — or nothing at all. Suspended and power chords on every root.
On Bsus4’s sound and use this page follows Edward Aldwell & Carl Schachter, Harmony and Voice Leading (Schirmer / Cengage, 4th ed., 2011). The shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.