You don’t need to know advanced theory to write a song on guitar. If you can play a handful of chords, you’ve already got everything you need to start creating your own music. The trick is understanding which chords naturally go together — and that’s simpler than you think. (Our chord theory section breaks this down in more detail, but here’s the practical version.)

Start With a Key

Pick a key to work in. G major is a great starting point because you probably already know most of the chords. In the key of G, here are the chords that naturally fit together:

  • G major (the I — “one” chord)
  • A minor (the ii)
  • B minor (the iii)
  • C major (the IV)
  • D major (the V)
  • E minor (the vi)

Any combination of these chords will sound good together. That’s not a simplification — it’s how keys work. These six chords are all built from the notes of the G major scale, so they’re harmonically related by default.

The Quick Way to Find Chords in Any Key

If you know your bar chords and your major scale, you can figure out the chords in any key. Play the major scale, then build a chord on each note. The pattern is always the same: major, minor, minor, major, major, minor, diminished. (You can safely ignore the diminished one for songwriting purposes.)

Or just use the capo transpose tool to figure out which chords go together in any key.

Pick a Progression

Most songs use three or four chords. The simplest starting point is G, C, and D — three chords, hundreds of songs. But try rearranging and adding to them:

  • G ? C ? D — the classic three-chord progression
  • G ? Em ? C ? D — the pop/rock staple
  • Em ? C ? G ? D — same chords, different starting point, completely different mood
  • G ? D ? Am ? C — the “four chord” progression that powers half of modern pop

Play each one a few times through and notice how the mood changes just by rearranging the order. The starting chord sets the emotional tone — starting on G feels bright and resolved, starting on Em feels darker and more open.

Add Rhythm and Feel

Once you’ve picked your chords, the rhythm you play them with is what turns a progression into a song. Try strumming the same four chords with a slow, even strum. Then try a syncopated pattern. Then try fingerpicking. The chords are identical — but the song feels completely different each time.

Don’t try to write the whole song at once. Start with a four-chord loop that feels good, get comfortable playing it, and then start humming or singing over it. Melodies come naturally when the chords are solid underneath.

Once your progression feels solid, try adding embellishments to the chords or riffs between the changes — small details that make a simple progression sound like a finished arrangement.