Immediately vs Instantly

When to use each in English, with meaning, register, and examples.

Immediately

Top 1,000 (very common) A2 adverb

Instantly

Top 5,000 (fairly common) B2 adverb

Most common: Immediately

	Immediately	Instantly
Pronunciation	🇬🇧 /["/ɪˈmiːdiətli/"]/ 🇺🇸 /["/ɪˈmiːdiətli/"]/	🇬🇧 /["/ˈɪnstəntli/"]/ 🇺🇸 /["/ˈɪnstəntli/"]/
Meaning	right away, without waiting	Right away, without waiting.
Example	He answered the question immediately after it was asked.	Her voice is instantly recognizable.
Register	Neutral	Neutral
How common	Top 1,000 (very common)	Top 5,000 (fairly common)
CEFR level	A2	B2
Part of speech	adverb	adverb
Collocations	respond immediately, act immediately, notify immediately	instantly available, instantly recognizable, instantly regret, instantly noticeable
Antonyms	eventually, later	gradually, slowly, eventually
Common mistakes	Using 'immediate' instead of 'immediately'., Confusing with 'eventually', which means later., Incorrectly placing 'immediately' at the end of a sentence.	Using 'instantly' with past tense incorrectly, e.g., 'I instantly saw' instead of 'I saw instantly'., Confusing it with 'immediately' when the emphasis on speed differs., Forgetting to use it with an action verb.
Usage notes	Use 'immediately' to emphasize urgency or promptness. It's appropriate in both spoken and written English, but avoid in very casual contexts.	Use 'instantly' in both spoken and written English to emphasize immediate action. It's appropriate in most contexts but less common in very casual conversations.

See it in real clips

Band Of Brothers › S1 E1

...and repeat all 12 miles of the march immediately.

Now, if the killer began running immediately...

Breaking Bad › S1 E7

I need to talk to you immediately.

Band Of Brothers › S1 E1

...and repeat all 12 miles of the march immediately.

Now, if the killer began running immediately...

Immediately

Frequently asked questions: Immediately vs Instantly

What's the difference between Immediately and Instantly?

Immediately: right away, without waiting Instantly: Right away, without waiting.

Which is more common: Immediately and Instantly?

Immediately is the most common in everyday English.

Which is more advanced: Immediately and Instantly?

Instantly is the highest level, at B2, on the CEFR scale.

Are Immediately and Instantly the same CEFR level?

Immediately: A2, Instantly: B2 on the CEFR scale.

What part of speech are Immediately and Instantly?

Immediately: adverb, Instantly: adverb.

Can you show an example of each?

Immediately: He answered the question immediately after it was asked. Instantly: Her voice is instantly recognizable.

Can I use Immediately and Instantly interchangeably?

Not always. Immediately and Instantly are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.