What Are the Six Main Types of Musical Cadences? 

Perfect, Imperfect, Half, Plagal, Deceptive and Phrygian

The Six Main Types of Musical Cadences: A Guide to Harmonic Endings

A musical cadence is much more than a sequence of two chords. It is one of the fundamental ways in which music communicates arrival, suspension, expectation and conclusion.

Cadences help listeners understand musical structure. They tell us when a phrase has reached its destination, when a musical thought remains unfinished, or when an expected resolution has been deliberately avoided.

In tonal harmony, cadences are primarily defined by the harmonic relationships between chords, particularly the dominant (V) and tonic (I).

There are six important cadence types worth understanding: perfect authentic, imperfect authentic, half, plagal, deceptive and Phrygian half cadences.

What Is a Musical Cadence?

A cadence is a harmonic progression that marks the ending of a musical phrase, section or composition.

In tonal music, the dominant chord creates a strong expectation of resolution towards the tonic. This is largely due to the leading tone, the seventh degree of the scale, which tends to resolve upwards by a semitone to the tonic.

In C major, for example:

G major → C major

The G major chord contains G, B and D. The note B is the leading tone and naturally tends towards C.

How the dominant resolves, whether the expected resolution occurs, and how the final chords are voiced determine the character of the cadence.

1. Perfect Authentic Cadence (PAC)

Formula: V → I

The perfect authentic cadence is the strongest conventional cadence in tonal harmony.

It has three defining characteristics:

• The dominant and tonic chords are both in root position.
• The final tonic chord has the tonic note (scale degree 1) in the soprano, the highest voice.
• The harmonic progression moves from V to I.

Example in C major:

G major → C major

The bass moves from G to C, while the leading tone B resolves to C.

The soprano also arrives on C, reinforcing the feeling of complete harmonic closure.

Perfect authentic cadences are particularly common at the ends of compositions and major musical sections.

When to use it: Choose a perfect authentic cadence when you want a phrase or composition to sound definitively finished.

2. Imperfect Authentic Cadence (IAC)

Formula: V → I

An imperfect authentic cadence also moves from dominant to tonic, but one or more conditions of the perfect authentic cadence are not fulfilled.

This can happen when:

• One or both chords are inverted.
• The soprano ends on a note other than the tonic.

For example, in C major, G major may resolve to C major while the soprano ends on E rather than C.

The harmonic progression reaches the tonic, but the result is less conclusive than a perfect authentic cadence.

Imperfect authentic cadences are frequently used within longer compositions, where a sense of resolution is needed without creating the impression that the entire musical statement has ended.

When to use it: Use an imperfect authentic cadence when you want harmonic arrival without maximum finality.

3. Half Cadence (HC)

Formula: Any suitable progression → V

A half cadence ends on the dominant chord.

Because the dominant normally creates an expectation of tonic resolution, stopping on V produces a feeling of suspension or incompleteness.

Example in C major:

Dm → G

The progression reaches G major but does not continue to C major.

The listener therefore expects something more.

Half cadences are particularly common at the ends of opening phrases. In classical period structure, an initial phrase may end with a half cadence, while a following phrase provides a stronger authentic cadence.

When to use it: Think of the half cadence as a comma rather than a full stop. It is useful when a musical phrase should remain open.

4. Plagal Cadence (PC)

Formula: IV → I

The plagal cadence moves from the subdominant chord to the tonic.

Example in C major:

F major → C major

Unlike the authentic cadence, the plagal cadence does not rely on the dominant's leading-tone tension.

Its movement towards the tonic is therefore generally softer and less directional.

The plagal cadence is traditionally associated with the ending of hymns and is often called the "Amen cadence".

However, it also appears in contemporary pop, cinematic music, ambient compositions and many other genres.

When to use it: Choose a plagal cadence when you want a gentle, warm or solemn conclusion rather than a dramatic dominant-to-tonic resolution.

5. Deceptive Cadence (DC)

Formula: V → vi

A deceptive cadence begins with a dominant chord but avoids the expected tonic.

Instead, the dominant resolves to another chord, most commonly the submediant (vi).

Example in C major:

G major → A minor

The listener expects G major to resolve to C major, but the progression moves to A minor instead.

The leading tone B can still resolve upwards to C, which is now part of the A minor chord. However, the bass moves to A rather than the expected C.

This creates a feeling of surprise and continuation.

Deceptive cadences are particularly effective for extending musical phrases, delaying conclusions and creating emotional ambiguity.

When to use it: If a progression feels too predictable, try resolving V to vi instead of I.

6. Phrygian Half Cadence

Formula: iv⁶ → V

The Phrygian half cadence is a distinctive cadence found primarily in minor-key music.

Its characteristic feature is the descending semitone movement in the bass, from scale degree 6 to scale degree 5.

Example in A minor:

Dm/F → E major

The first chord is D minor in first inversion, with F in the bass. The second chord is E major, with E in the bass.

The bass therefore moves:

F → E

This creates a particularly distinctive tension leading into the dominant chord.

The Phrygian half cadence was especially important in Baroque music and is associated with a dramatic, sometimes archaic or solemn character.

When to use it: Try this cadence when composing in minor keys and you want to create a strong sense of anticipation before arriving at the dominant.

Comparing the Six Cadences

Practical Listening Exercise

Choose a major key, such as C major, and play the following progressions:

1. G → C (perfect authentic, with suitable root-position voicing and tonic soprano).
2. G → C with an inversion or a different soprano ending (imperfect authentic).
3. Dm → G (half cadence).
4. F → C (plagal).
5. G → Am (deceptive).

Then move to A minor and play:

Dm/F → E

Listen to how the different endings influence your perception of musical direction.

Try repeating the exercise with seventh chords as well as simple triads.

Why Cadences Matter

Cadences are essential tools for controlling musical expectation.

They allow composers to create a clear sense of structure, distinguish between open and closed phrases, and introduce surprises without abandoning the underlying harmonic language.

Even in contemporary electronic music, where traditional functional harmony may be used less explicitly, the psychological principles of tension and release remain valuable.

Understanding cadences allows you to turn a sequence of chords into a musical statement with direction, character and meaning.

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