Need Doing vs. Need To Be Done
“Needs doing” and “needs to be done” can both say that an action is necessary for the subject. The second makes the passive form explicit.
In the passive-meaning pattern, “needs doing” and “needs to be done” can express the same necessity: something requires that action.
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| the subject is the thing that requires an action | need + -ing | Use the passive-meaning construction. |
| the subject is the thing that requires an action, stated with an explicit passive | need + to be + past participle | Use the explicit passive-infinitive construction. |
| the subject is the doer who must act | need + to + base verb | This is a different active-necessity pattern. |
Quick tests
Meaning / construction test
Is the grammatical subject the thing that requires the action rather than the person performing it?
If yes: Use either the passive-meaning “needs doing” pattern or “needs to be done,” according to the construction you want.
If no: If the subject is the doer, use the separate “need to do” pattern.
Caveat: This comparison is limited to the passive-meaning construction and should not be generalized to every use of “need + -ing.”
Examples
The windows need cleaning.
The windows receive the action; the -ing construction has passive meaning.
The windows need to be cleaned.
The explicit passive infinitive expresses the same basic necessity.
We need to clean the windows.
Here “we” are the doers, so this is the separate active pattern.
Further guidance
Boundary
This comparison is about a passive-meaning construction; it is different from personal “need to do,” where the subject is the doer.
Ing Pattern
In the passive-meaning pattern, need + -ing says that the subject requires an action, as in “The clothes need washing.”
Passive Infinitive
Need + to be + past participle can express the same necessity explicitly, as in “The clothes need to be washed.”
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Need — Cambridge Essential British English Dictionary (opens in a new tab)Cambridge Dictionary · Documents needs doing and needs to be done as passive-meaning necessity patterns