The point of learning progressions in Roman numerals is transposition. I-V-vi-IV means the same relationship in every key. In C major it is C-G-Am-F. In G major it is G-D-Em-C. In D major it is D-A-Bm-G. Same feel, different key.

Workhorse 1: I-V-vi-IV

The pop-rock progression of the last five decades. Let It Be, Don’t Stop Believing, With or Without You, Someone Like You. In C major: C to G to Am to F. In G major: G to D to Em to C. Try it on the tool.

Workhorse 2: vi-IV-I-V

Same four chords, different starting point. Lands on a darker opening because vi is the minor tonic-relative. In C major: Am to F to C to G. Zombie by the Cranberries; Africa by Toto (chorus).

Workhorse 3: ii-V-I

The jazz cadence. In C major: Dm7 to G7 to Cmaj7. Predominant to dominant to tonic, the full T-PD-D-T arch compressed to three chords. Every jazz standard has ii-V-I somewhere. Learning to hear it is the single fastest way to open up jazz repertoire.

Workhorse 4: I-IV-V-I

The simplest possible T-PD-D-T. The blues shell (three chords, twelve bars, dominant sevenths). The folk shell (three chords, strummed, sung). The hymn shell (three chords, four-part chorale). If you know only three chords in a key, know these three.

Why these four?

All four progressions live in three adjacent segments of the circle of fifths. That is not a coincidence; it is why they sound resolved. Adjacent circle keys share six of seven notes and share the dominant-tonic pull. See the circle of fifths explainer.

Practice them in every key

Adult learners get stuck playing only in C major. Two-week fix: pick one workhorse, drill it through five keys (C, G, D, A, E) with the metronome at 60 BPM. Two weeks in, the shapes will feel native everywhere.