A hammer-on is exactly what it sounds like: you strike a fretted note by hammering your finger down, no pick. The string is already vibrating; your fretting finger just changes its pitch mid-ring.
Deep-dive guide
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A longer write-up with every detail, drill, and common pitfall.
The mechanic
Pick a string. While it's still ringing, slap a finger down on a higher fret. The note jumps up.Try this on the open G string:
- Pluck the G string open
- Half a beat later, hammer your index finger onto the 2nd fret of the G string
- The note moves from G to A
You should hear two notes from one pluck.
Apply it to chord changes
Hold an open Em chord. Strum. Then, while it's ringing, hammer your ring finger onto the 2nd fret of the G string (turning it into an Em-with-A, which sounds like Eadd9). Strum again.Suddenly Em sounds twice as interesting.
Drill the most useful hammer-ons
Open D string → 2nd fret D (hammer to E with middle finger).
Open G string → 2nd fret G (hammer to A with middle finger).
Open B string → 1st fret B (hammer to C with index finger).
Practice metronome
70BPM
70 BPM. Strum the chord, hammer on the second beat. Repeat.
In real songs
The intro to Blackbird (lesson 13) is hammer-ons and pull-offs from start to finish. Stairway to Heaven's opening is a fingerpicked pattern with hammer-ons baked in. Hammer-ons aren't a flashy technique; they're a baseline skill that shows up in every acoustic song.Next: Blackbird. Hammer-ons and pull-offs in one of the most-played fingerstyle songs ever.