Standards

I Guess I'll Have To Change My Plan chords & key

Key: C major
Form: ABC
Bars: 20
Groove: Ballad
Time signature: 4/4

“I Guess I'll Have To Change My Plan” is a jazz standard by Arthur Schwartz. It is usually played in C major as a ballad, and the 20-bar ABC form has 3 sections. Harmonically it contains 3 major ii–V–I cadences, uses 16 different chords and moves between the key centres C major and F major. In this atlas it appears on 1 album track.

Chord changes

to key

Showing in: Concert (C) — C major

C^maj7G⁷

C^maj7A^m7

D^m7G⁷

E^m7A^m7

D¹³

D^m7G⁷

C^maj7G⁷

C^maj7

G^m7C⁷

F^maj7

F⁶F^m6

E^m7E♭^dim7

D^m7G⁷

C^maj7G⁷

B♭⁷A⁷

D⁷G⁷

C⁶G⁷

Changes as commonly played (concert pitch). Your band's version may differ.

Harmonic analysis

3Major ii–V–I

0Minor ii–V–i

6ii–V moves

0Tritone substitutions

2Dominant chains

16Different chords

Most used chords

G⁷×10
C^maj7×6
D^m7×4
E^m7×3
A^m7×2
E♭^dim7×2

Key centres reached by ii–V

C major and F major

Recorded on these albums

1957	A Swingin’ Affair! Frank Sinatra · “I Guess I’ll Have to Change My Plans”

Standards with similar changes

Similarity of the chord progression, independent of key.

Title	Composer	Key	Form	Groove
I Like The Likes Of You 31%	Vernon Duke	E♭ major	AABA · 32	Medium swing
I Want To Be Happy 30%	Vincent Youmans	C major	AABA · 32	Medium-up swing
It's Magic 30%	Jule Styne	B♭ major	ABCD · 32	Ballad
Jeepers Creepers 30%	Harry Warren	B♭ major	AABA · 34	Medium swing
A Certain Smile 29%	Fain-Webster	F major	ABAC · 32	Medium swing
Candy 29%	David-Whitney-Kramer	B♭ major	AABA · 32	Medium swing
The Lady's In Love With You 29%	Burton Lane	G major	AABA · 32	Medium swing
Eclypso 28%	Tommy Flanagan	E♭ major	AABA · 32	Latin/swing

Frequently asked questions

What key is I Guess I'll Have To Change My Plan in?

I Guess I'll Have To Change My Plan is usually played in C major. For B♭ instruments that is D major, for E♭ instruments A major.

Who wrote I Guess I'll Have To Change My Plan?

I Guess I'll Have To Change My Plan was written by Arthur Schwartz.

What is the form of I Guess I'll Have To Change My Plan?

I Guess I'll Have To Change My Plan has 3 sections (ABC) with 20 bars in total.

How fast is I Guess I'll Have To Change My Plan played?

The usual groove is Ballad.

What are the chord changes to I Guess I'll Have To Change My Plan?

The opening bars are Cmaj7 G7 | Cmaj7 G7 | Cmaj7 Am7 | Dm7 G7. The full chart above can be transposed to any key.