What is the most common chord progression?

I-V-vi-IV is the most common progression in Western pop. In C major the chords are C, G, Am, and F. Thousands of hit songs across genres use this exact four-chord loop.

What do the Roman numerals in a chord progression mean?

They name each chord by its position in the key — I is built on the first scale note, V on the fifth, and so on. Uppercase numerals are major chords and lowercase are minor, so the pattern works in any key.

What key should I write a chord progression in?

Any key works, because the relationships between the chords are the same everywhere. C major is a common starting point since it has no sharps or flats; otherwise choose the key that suits the singer's range or the instrument.

How do I make a chord progression sound sad?

Start on a minor chord or lead with the vi chord — vi-IV-I-V (Am-F-C-G in C major) feels more wistful than the brighter I-V-vi-IV, even though it uses the same four chords in a different order.

Common Chord Progressions Every Writer Knows

ArtyphonicJune 13, 20263 min read

A chord progression is a sequence of chords played in a set order. A small handful of patterns sit under most popular songs, and they are written in Roman numerals — I, IV, V, vi — so the same progression works in any key. The most common of all is I-V-vi-IV, which in C major is C, G, Am, F.

How Roman numerals work

Number the seven chords built on each note of a major scale, 1 through 7. Write them as Roman numerals and you can describe a progression without naming a key: uppercase for major chords, lowercase for minor. In any major key, I, IV, and V are major; ii, iii, and vi are minor. Because the numerals track position rather than letter names, one pattern transposes everywhere — move I-V-vi-IV from C to G and you simply read the new key's chords.

Numeral	In C major	In G major	Quality
I	C	G	Major
ii	Dm	Am	Minor
IV	F	C	Major
V	G	D	Major
vi	Am	Em	Minor

Four chord blocks arranged in a loop with arrows returning to the start — Most pop progressions are four chords that loop — the cycle back to the first chord is the hook.

The progressions worth knowing

Progression	In C major

I-V-vi-IV	C-G-Am-F	Countless pop songs
I-IV-V	C-F-G	Rock, blues, folk
vi-IV-I-V	Am-F-C-G	Emotional pop, ballads
ii-V-I	Dm-G-C	Jazz, soul turnarounds
I-vi-IV-V	C-Am-F-G	50s doo-wop, oldies

How Roman numerals work

The progressions worth knowing

Building and hearing them