Talking About the Future: Going To and Will
When to use 'going to' and when to use 'will' — the difference is about planning, not about time.
English has no single future tense. The two forms you need first are going to and will, and choosing between them is about how you decided, not about how far away the event is.
Going to: plans and evidence
Use going to for decisions made before the moment of speaking, and for predictions based on something you can see.
- I'm going to study medicine. (decided already)
- We're going to visit my parents on Sunday. (arranged)
- Look at those clouds — it's going to rain. (evidence right now)
Form: am / is / are + going to + base verb.
Will: decisions made now, and opinions
Use will for decisions made at the moment of speaking, offers, promises, and predictions based on opinion.
- The phone's ringing. I'll get it. (decided this second)
- I'll help you with that. (offer)
- I think she'll like it. (opinion)
Form: will + base verb, for every subject. Negative: won't.
The classic comparison
A: We need more milk. B: OK, I'll buy some. (deciding now)
A: Why are you taking the car? B: I'm going to buy milk. (already planned)
Present continuous for arrangements
For fixed arrangements with a time and place, English often uses the present continuous:
- I'm meeting Anna at six.
- We're flying to Rome on Tuesday.
This is very common and sounds natural for diary events.
Quick guide
| Situation | Use |
|---|---|
| Already decided | going to |
| Deciding right now | will |
| Offer or promise | will |
| Evidence you can see | going to |
| Fixed arrangement | present continuous |
Try it yourself
The quiz below tests the decision-timing difference, which is what actually separates the two.