Active vs Passive: Choosing the Right Voice

Passive isn't just a grammatical option — it's a deliberate stylistic choice. Choose it when one of these applies:

The agent is unknown, unimportant, or obvious from context, so naming it would only clutter the sentence: The window was broken last night — nobody knows (or needs to know) who did it, and adding by someone would add nothing.
You want to sound objective and impersonal, as in scientific or academic writing, where the process matters more than the person carrying it out: The samples were heated to 100°C reads as a standard lab-report sentence, whereas I heated the samples sounds oddly personal for a methods section.
You want to avoid blaming someone directly — a deliberate, sometimes evasive, rhetorical choice: Mistakes were made hides the responsible party, unlike the blunt You made mistakes.
You want to keep the same subject running through a paragraph for cohesion, even when its grammatical role shifts from agent to patient: The report was finished on time. It was then sent to head office, and a reply was received within a week keeps report/it as the topic throughout, instead of jumping between different subjects.

Active voice, however, is generally the better default. It is more direct and concise — the doer comes first, the action follows immediately, and the sentence usually needs fewer words: The committee approved the budget is shorter and clearer than The budget was approved by the committee. Because passive can obscure who did what, most style guides for journalism and business writing explicitly recommend active voice as the default, reserving passive for the specific situations above. A text that leans on passive without a clear reason often reads as vague, bureaucratic, or evasive — precisely the impression a hedging or blame-avoiding writer sometimes wants, but rarely the impression a clear, confident writer wants.

Compare the same information expressed both ways to see how context decides the better choice. In a scientific method section: We heated the mixture to 100°C (active, names the researcher) versus The mixture was heated to 100°C (passive, focuses on the procedure) — the passive reads better here, because lab reports describe what was done to the materials, not who did it. In a company's annual report explaining a loss: Poor decisions cost the company $2 million (active, assigns responsibility) versus $2 million was lost due to poor decisions (passive, blurs who is responsible) — here the active version usually reads better, because readers of a report expect to know who is accountable, and the passive can look like it's dodging the point. In a news headline about an arrest: Police arrested three suspects overnight (active, names the actor) versus Three suspects were arrested overnight (passive, the arresting authority is implied and less newsworthy than the event itself) — both are acceptable, but headlines often prefer the passive precisely because the event matters more to readers than repeating an obvious agent.

The most common mistake is defaulting to passive out of habit rather than choosing it for a reason. This tendency is reinforced in learners whose own academic writing tradition favours impersonal, passive-heavy prose, and who then transfer that habit into English even when an active sentence would be clearer and more natural. It was decided by the committee that the project would be cancelled is needlessly heavy next to The committee decided to cancel the project, and nothing here calls for passive — the agent (the committee) is known, relevant, and worth naming. A second, related mistake is overusing passive across a whole paragraph until the reader loses track of who is actually doing what: The proposal was reviewed. Concerns were raised. Changes were requested. A revised version was submitted leaves every actor invisible, and by the fourth sentence the reader can no longer tell who reviewed, who raised concerns, or who revised anything — mixing in a few active verbs, or naming the agent even once, restores clarity.

To decide, look at genre and purpose rather than habit. A lab report, a methods section, or a formal process description points to passive (the sample was centrifuged, the data were analysed). A casual email, a story, an instruction addressed directly to the reader, or any context where accountability matters points to active (I'll send the report by Friday, not The report will be sent by Friday, unless you deliberately want to soften the commitment). An unnamed, unknown, or genuinely unimportant agent, or a need to keep the same subject running through several sentences, both favour passive; a known and relevant agent, especially one who should be held responsible, favours active. When in doubt, write the sentence in active voice first and switch to passive only if you have one of the specific reasons above — that habit alone prevents most of the overuse problems described earlier.

Practice

Context Clues: Choosing Active or Passive · Worked Comparisons & Avoiding Overuse