Secondary Dominants Explained: V/V, V/vi and More for Your Beats

You have a loop that sits nicely in one key. Then you hear a song where one chord suddenly makes the next one hit harder, like the music is leaning forward. Very often that chord is a secondary dominant.

It sounds like heavy theory, but the idea is simple: you borrow the "pull" that normally leads back home and aim it at a different chord in your key. Below you will learn what a secondary dominant is, how to build one in your piano roll in under a minute, and six progressions you can drop into a beat today.

What is a secondary dominant?

Every key has a dominant chord: the chord built on the fifth note of the scale. In C major that is G (or G7). The dominant creates tension that wants to resolve to the home chord, C. That V → I move is the strongest pull in Western harmony.

A secondary dominant is the dominant of another chord in your key. Instead of pointing at C, it points at, say, Am or G. For a moment the target chord feels like a temporary home. Music theory calls that tonicization. According to Wikipedia's article on secondary chords, a secondary dominant is a major triad or dominant seventh chord set to resolve to a scale degree other than the tonic. You will also see the name applied chord, which means the same thing.

How to read V/V, V/vi and V/ii

Secondary dominants are written with a slash. Read the slash as "of":

• V/V = "five of five", the dominant of the dominant.
• V/vi = "five of six", the dominant of the vi chord.
• V7/ii = "five-seven of two", a dominant seventh that leads to ii.

The part before the slash is the chord you play, the part after it is where it wants to go. Uppercase Roman numerals are major chords, lowercase are minor. Need a refresher on the chords in a key? Read which chords go together first.

All secondary dominants in C major

Here is every secondary dominant in C major, with the notes of the seventh-chord version. The note in bold is the one that is not in the C major scale, and that one note is where the extra pull comes from.

• V/ii: A7 (A, C#, E, G) → Dm
• V/iii: B7 (B, D#, F#, A) → Em
• V/IV: C7 (C, E, G, B♭) → F
• V/V: D7 (D, F#, A, C) → G
• V/vi: E7 (E, G#, B, D) → Am

Two things to notice. First, there is no V/vii°: diminished chords do not get their own secondary dominant, because a diminished chord does not feel like a home, even for a moment. Second, V/IV is just C with a B♭ added. Without that seventh it is the same as your I chord, so the B♭ is what makes it a secondary dominant. Want these in another key? Use the chords by key chart and apply the steps below.

How to build a secondary dominant in your piano roll

1. Pick a target chord. Choose a chord in your loop that you want to hit harder, for example Am in C major.
2. Find its fifth. Count 7 semitones (keys, black and white) up from the target's root. From A you land on E.
3. Build a major chord there. Root, plus 4 semitones, plus 7 semitones: E, G#, B. Even if the key would normally give you E minor, make it major.
4. Add the seventh for more tension. Add a note 10 semitones above the root: D. Now you have E7.
5. Place it right before the target. E7 goes in the bar (or half bar) before Am. That is where it does its job.
6. Check the voice leading. The raised note (G#) wants to move up a half step to A, and the seventh (D) wants to move down a step to C. If your top notes do that, the resolution sounds smooth. Open Music Theory describes the same rule: the secondary leading tone goes up by step, the seventh goes down by step.

Do not know the key of your beat yet? Drop the file into the free Beat Lab and you get an estimate of the BPM and key in seconds.

6 progressions with secondary dominants to try

Each chord lasts one bar unless noted. Play them plainly first, then add rhythm, inversions and your drums.

1. The pop classic: V/vi (C major)

C | E7 | Am | F

Swap the usual G or Em for E7 and the move into Am suddenly feels emotional and dramatic. This is one of the most common secondary dominants in pop and R&B ballads. Great for a hook that needs a lift.

2. Into the ii-V: V/ii (C major)

C | A7 | Dm | G7

A7 pulls into Dm, and Dm → G7 → C is the classic ii-V-I. The result sounds jazzy and bouncy, perfect for lo-fi, boom bap or a soulful sample-style beat. More loops like this in our jazz chord progressions.

3. The big lift: V/V (C major)

C | F | D7 | G

D7 is the dominant of G. Instead of going straight from F to G, the D7 adds a sunny, hopeful push. You hear this sound in a lot of pop, country and gospel. Hold the G for a full bar before the loop restarts.

4. The chain: extended dominants (C major)

E7 | A7 | D7 | G7 | C

Each chord is the dominant of the next one, stepping around the circle of fifths until you land on C. Wikipedia calls these extended dominants and gives "Sweet Georgia Brown" as a song that opens with a dominant chain like this. In a beat, use two bars per chord for a smooth, old-school jazz feel, or put the whole chain in a turnaround at the end of a section.

5. Dark trap with a twist: V/iv (C minor)

Cm | C7 | Fm | G7

Secondary dominants work in minor keys too. C7 turns your home chord into a dominant that pulls hard into Fm. The G7 at the end is the regular dominant from the harmonic minor scale and leads you back to Cm. Let your 808 follow the roots (C, C, F, G) and this loop has a dark, cinematic weight. Want it even darker? Try our dark trap chord progressions.

6. The sneaky one: secondary leading-tone chord (C major)

C | F#°7 | G | C

Instead of D7 you play F#°7 (F#, A, C, E♭), a diminished seventh chord a half step below G. It does the same job as V/V, but sounds tenser and more mysterious. Play it for half a bar to keep it from getting messy. More on these chords in diminished chords explained.

Tips so it sounds good in a beat

• One per loop is plenty. A single secondary dominant gives your loop a moment of tension. Five in a row turns it into a jazz exercise (unless that is the goal).
• Move the 808 and bass. The bass should play the root of the secondary dominant (E under E7, A under A7). A bass that stays on the old note will clash.
• Watch the melody. The raised note is the danger zone. If your lead plays a G while the chords play E7 (with G#), it will sound wrong. Change the melody for that bar or let it rest.
• Check autotune on the vocals. Pitch correction set to C major will pull a sung G# down or up to a scale note. Set the scale to chromatic for that part, or adjust the notes the plugin allows.
• Short often works best. A secondary dominant on the last two beats before the target chord is often more effective than a full bar.

Secondary dominant vs borrowed chord vs key change

These three get mixed up a lot:

• Secondary dominant: a dominant chord that points at another chord in your key. Short tension, quick resolution, you stay in the key.
• Borrowed chord: a chord taken from the parallel key (C minor while you are in C major) for color, not for pull. Read borrowed chords explained.
• Key change: the music actually settles into a new home key. A secondary dominant is often how you get there. Read how to change key in a song.

Get started fast

Make a four-chord base loop in the free chord progression generator: pick a mood and key, download the MIDI and drop it into FL Studio, Logic Pro or Ableton. Then pick one chord, build its secondary dominant with the steps above and put it in the bar before. Prefer to write over something that is already finished? Browse the NameOnTheBeat beats.

FAQ

What is the most common secondary dominant?

V/V, the dominant of the dominant. In C major that is D or D7 going to G. Wikipedia calls it the most common example. In pop ballads, V/vi (E7 to Am in C) is just as easy to recognize.

Do secondary dominants always need a seventh?

No. A plain major triad works, but the seventh adds tension and makes the pull clearer. For V/IV you do need the seventh, otherwise it is just your I chord.

Can I use secondary dominants in trap or drill?

Yes. In minor keys V/iv (C7 to Fm in C minor) gives a dark, dramatic lift. Use it in a transition or the last bar before the hook so the verse stays simple for the vocal.

Why does my secondary dominant sound wrong?

Usually one of three things: the bass or 808 is still on the old note, the melody plays the unraised note (G instead of G#), or the chord does not resolve to its target. Fix those and it will click.

What is the difference between a secondary dominant and a tritone substitution?

A tritone substitution replaces a dominant chord with the dominant chord a tritone (6 semitones) away, for example D♭7 instead of G7. It is a jazz trick that you can apply to secondary dominants too, but you can learn secondary dominants first without it.

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