“The policy had a big affect on sales.”
Here we want the result of the policy — a noun. ‘Affect’ is almost always the verb.
Confusables Entry 02 / 1605 60-second read Everyday
Affect vs. Effect
The action versus the result — a verb and a noun most of the time.
The comparisoni
“The policy had a big effect on sales.”
‘Effect’ is the result or outcome. It sits comfortably after ‘a’ or ‘the’.
More examplesii
01
The medicine didn’t effect her at all.
The medicine didn’t affect her at all.
The medicine acts on her — that’s the verb, ‘affect.’
02
The new law will affect stricter penalties.
The new law will effect stricter penalties.
Rare verb use: ‘effect’ as a verb means ‘to bring about.’ The law will cause the penalties to exist.
The ruleiii
¶
AFFECT acts. EFFECT is the result.
Use AFFECT as the verb (to influence). Use EFFECT as the noun (the outcome). Rare exceptions exist — skip them until you can’t avoid them.
Notesiv
Origin
Both come from Latin *facere* (to make/do). ‘Affect’ from *afficere* (to act on); ‘effect’ from *efficere* (to bring about). The prefixes — *ad-* toward, *ex-* out of — explain why one acts and one results.
Register
Standard everywhere. The rare ‘effect’ as a verb (to bring about) is formal — legal, political, or official writing.
Watch for
‘Effect’ can be a verb (to cause) and ‘affect’ can be a noun (a flat emotional state) — both are rare, but they trip up people who try to memorise the simple rule too hard.
Memory aidv
Remember it like this
A comes before E. Action (affect) comes before the End result (effect).
A bit of historyvi
The fewer-vs-less style of usage rule was a Robert Baker invention in 1770. The affect/effect distinction is older — both spellings stabilized in English by the 16th century, and dictionaries since Samuel Johnson have treated them as the verb-noun pair we use today. The persistent confusion isn't new; complaints about it appear in usage manuals continuously from the late 19th century onward.
In the wildvii
Real-world-style usage — how this looks in a sentence people would actually write.
- The reorganisation had no effect on morale, but it did affect the engineers’ commutes.
- She tried to effect a change in policy, knowing it would affect how the team was measured.
Spottedviii
Specimens from the editorial inbox — lines that did, in fact, get published.
“The new diet had an immediate affect on her energy levels.”
— A wellness magazine column, 2020
“The policy change could effect hundreds of families this winter.”
— A local news broadcast chyron, 2022
Test yourselfix
Which is right?
Quick duel 4 questions · ~30 seconds
Which is right?