I–III–IV–iv: The Creep Progression
G–B–C–Cm is famous because it breaks diatonic expectations in a very singable way. In G major, the B major chord (III) and the borrowed Cm (iv) both introduce notes outside the key, so the progression feels like it’s constantly tilting between confidence and insecurity. The move to C is a clear lift, but the immediate shift from C to Cm is the gut punch: the same root, suddenly darker color, which makes a chorus feel emotionally exposed without changing the melody much. That’s why it works so well for big, belted lines—you can keep the top note steady while the harmony changes meaning underneath it. You’ll hear this trick in alternative rock and modern pop whenever a writer wants bittersweet tension. Try adding a dominant (D) after Cm to pull harder back to G, or hold the Cm longer for extra drama.
- Key
- G major
- Tempo
- 92 BPM
- Groove
- rock
Play it on guitar
Start slow, keep your right hand steady, and aim for clean changes on the downbeats. Once it’s comfortable, add a groove and increase tempo.
Capo suggestion: try capo 0 and play in G shapes for open chords.
Chords: G – B – C – Cm
Roman numerals & theory
Roman numerals describe the chord’s function relative to the key. This helps you transpose the “shape” to any key without memorizing new chord names.
In G major: I–III–IV–iv
Theory Breakdown
This bittersweet loop (I–III–IV–iv) is a classic example of modal mixture. It starts on a bright major tonic (I), moves to a major III chord (which introduces a non-diatonic leading tone, adding intense emotional longing), lifts to the major IV, and then drops into a minor iv chord. The minor iv is borrowed from the parallel minor key. The voice leading is incredibly powerful: the 3rd of the IV chord drops by a half-step to become the minor 3rd of the iv chord, which then resolves down another half-step to the 5th of the tonic chord. This chromatic descent is what creates the iconic feeling of melancholic release.
Musical Context
Famous for its role in Radiohead's alternative rock anthem "Creep," this progression has a long history, appearing in Lana Del Rey's "Get Free" and even elements of classic pop songwriting. It is the ultimate vehicle for dynamic build-ups and emotional releases.
Practice Tips
Pay close attention to the transition from the major IV to the minor iv (e.g., C major to C minor). Ensure that the changing note (E to E-flat in the key of G) is clearly heard, as that half-step drop is the entire emotional hook of the progression. On guitar, use barre chords to make this transition seamless.
Variations (keep the progression, change the feel)
- • Add 7ths for color (try maj7 on I, m7 on vi, and V7 before resolving).
- • Use a sus4 resolve on the V chord (e.g. Gsus4 → G) to create tension and release.
- • Change the rhythm instead of the chords: try anticipations (hit the next chord on the “and” of 4).
- • Arpeggiate the top notes to create a hook while the harmony stays the same.
- • Borrow a darker chord for contrast (in a major key, try iv for one bar before returning).
Related
FAQ
Select a chord below to start building your progression