What are you gonna do vs What will you do

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

What are you gonna do

InformalBeyond 10,000 (less common)

What will you do

Top 2,000 (common)
Most formal: What will you doMost common: What will you do
 What are you gonna doWhat will you do
Pronunciation🇬🇧 //wɒt ɑː juː ˈɡənə duː//🇺🇸 //wɑt ɑr ju ˈɡənə du//🇬🇧 //wɒt wɪl juː dʊ//🇺🇸 //wɑt wɪl ju du//
MeaningWhat will you do?A question asking about someone's future actions.
ExampleAfter lunch, what are you gonna do?What will you do if it rains during the picnic?
RegisterInformalNeutral
How commonBeyond 10,000 (less common)Top 2,000 (common)
Collocationsgonna do something, gonna make plans, gonna hang outdo something, do a task, do a favor
Common mistakesUsing 'going' instead of 'gonna', Confusing the phrase with 'what are you going to do?', Forgetting to use a question markConfusing tense by using present instead of future., Omitting 'will' in the question., Using 'what do you do' instead of 'what will you do' for future plans.
Usage notesUse in casual conversations to ask about a person's future plans. Avoid in formal settings.Used to inquire about future plans or intentions. Appropriate in both casual and formal settings.

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What are you gonna do
What will you do

Frequently asked questions: What are you gonna do vs What will you do

What's the difference between What are you gonna do and What will you do?

What are you gonna do: What will you do? What will you do: A question asking about someone's future actions.

Which is more formal: What are you gonna do and What will you do?

What will you do is the most formal of these.

Which is more common: What are you gonna do and What will you do?

What will you do is the most common in everyday English.

Can you show an example of each?

What are you gonna do: After lunch, what are you gonna do? What will you do: What will you do if it rains during the picnic?

Can I use What are you gonna do and What will you do interchangeably?

Not always. What are you gonna do and What will you do 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.

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