Affect vs Effect: Choose by Action or Result
In TOEIC Part 5, affect and effect look close, sound close, and can appear in business sentences about changes, delays, sales, costs, and performance.
That can make the choice easy to overthink. But the quick check is simple: does the sentence need an action, or does it need a result?
The quick choice
Do not start by translating both words. Look at the job the word must do in the sentence.
Affect
Use it when something changes or influences another thing: affect sales, affect performance, affect delivery times.
Effect
Use it when the sentence talks about the result or impact: the effect of the change, a positive effect, no effect.
The signal to remember
This page focuses on the common business-use distinction shown in these examples: affect as an action verb and effect as a result noun.
The delay changed the schedule. Choose affect.
The sentence names the result or impact. Choose effect.
The policy may change productivity. Choose affect.
The sentence talks about the result. Choose effect.
What to notice
This contrast can appear near familiar business words such as sales, costs, schedules, productivity, performance, delivery, and customer satisfaction.
Familiar topic words can make you choose too quickly. The safer move is to ask what role the answer has in the sentence.
Something changes or influences another thing. Choose affect.
The sentence names the result or impact. Choose effect.
These often point to an action. Something may change something else.
These often point to the result or impact.
Watch the small words
Small words around the blank can make the decision faster.
Choose affect
Look for action helpers: may, could, will, can, might. Example: The change may affect sales.
Choose effect
Look for result markers: an, the, no, positive, negative. Example: The change had a positive effect.
These signals are not the whole rule, but they are useful under time pressure.
Quick TOEIC check
Choose first. Then read the feedback. Use the quick check: action or result?
1. The software update may ___ system performance.
2. The new schedule had a positive ___ on employee morale.
3. Rising fuel prices could ___ delivery costs.
4. The manager explained the ___ of the policy change.
The mistake to avoid
When reading quickly, it is easy to choose the word you remember seeing before. That is risky because both words can appear in business English.
Weak choice
Choose because the word looks familiar in business writing.
Better choice
Choose by the job: action or result.
This is the MTC move: do not debate the whole sentence. Find the job of the word and take the point.
Why this mistake returns under pressure
If you understand affect and effect during review but miss the choice in timed practice, the problem may not be vocabulary alone. It may also be the speed of the decision.
Under pressure, use the same move every time: check whether the sentence needs an action or a result, then choose.
Use small TOEIC mistakes as a diagnostic
If you know the answer after review but miss it during timed practice, the problem may not be the word alone. It may be your decision pattern.
Start with the Learning Block Diagnostic to see whether your mistakes connect to Speed Trap, Memoriser, Over Thinker, Translator, Passive Listener, or Burnout.
Continue reading
Use these pages to turn small TOEIC mistakes into faster decisions and better review.