Guide · Songwriting

How to write a song on piano

Choose a key, play a four-chord loop with your right hand while the left hand plays the root notes, then sing or hum a melody over it. Start with C, G, Am and F, write the words to the melody, and record it as you go.

Updated 20 Oct 2026

1. Choose a key

C major has no sharps or flats, so it is the easiest to see. Pick the key that suits the voice. See how to find the key of a song.

2. Build a four-chord loop

Try C, G, Am, F (I-V-vi-IV in C). See common chord progressions.

3. Give the left hand a job

Start by playing just the root note of each chord with the left hand, or play the root as an octave. Then try spreading the notes of the chord.

4. Sing a melody on top

Loop the chords and hum. Record it. See how to write a melody.

5. Add the words

Fit lines to the melody. See how to write lyrics.

6. Record as you go

A voice memo is enough. Record the loop even before you have a melody.

Common questions

What is the easiest key to write a song on piano?

C major is often the easiest to start in, because it uses only the white keys.

What chords should I use on piano?

C, G, Am and F cover many songs in C.

How do I write a melody on piano?

Loop the chords and hum or play notes from the scale over them.

Do I need to read music?

No. You can write by ear and record it.

How do I keep my ideas?

Record them and write the key and chords down with the recording.