To That Effect vs Affect: Which Is Correct? Meaning & Examples

The difference between to that effect vs affect becomes clear when you know which word describes an action and which one describes its result. The basic difference between affect and effect is easier to understand by looking at their role in a sentence.

Affect is usually a verb that can produce a change or influence something, while effect is usually a noun that describes the results or impact of something that happens. These words are commonly confused in English, but their meaning, grammar, and usage are different. For example, the weather can affect your mood, showing how one thing can influence another.

In everyday language, affect and effect appear in many expressions, and knowing this distinction can prevent confusion. The effect of modern computers on our lives can be significant.

The word effect describes the result, while affect describes the action or influence that leads to that result. From my experience explaining English grammar, connecting each word with its function makes the difference much easier for learners to remember and apply.

The same rule can be used in different situations. When something is done and changes a situation, it may affect the outcome, while what follows can be the effect. This basic pattern helps learners understand how these words work naturally in English and makes their everyday usage clearer.

Quick Answer

“To that effect” is a correct English expression used when referring to a statement, idea, or message with a particular meaning. “Affect” is usually a verb meaning to influence or change something. They are not interchangeable: use “to that effect” for a related meaning or statement, and “affect” for influence or impact.

Why Do People Confuse “To That Effect” and “Affect”?

The confusion often comes from the word “effect.” In the expression “to that effect,” effect is part of a fixed phrase. It does not mean exactly the same thing as the verb “affect.”

Compare these examples:

• She made a statement to that effect.
• The weather may affect our plans.

In the first sentence, “to that effect” means the statement expressed a similar idea.

In the second sentence, “affect” means influence or change.

The words may appear in formal sentences, but they perform completely different grammatical and semantic roles.

What Does “To That Effect” Mean?

“To that effect” is an idiomatic expression meaning “with that meaning,” “expressing a similar idea,” or “with a similar message.”

It is commonly used when someone has already mentioned an idea and you want to refer to another statement, comment, decision, or message that expresses essentially the same idea.

Examples

• The manager sent an email to that effect.
• She made a statement to that effect.
• I received a message to that effect.
• The company issued a notice to that effect.

For example:

The teacher said that students needed to submit their work by Friday. She later sent an email to that effect.

Here, “to that effect” means the email communicated essentially the same message.

What Does “Affect” Mean?

“Affect” is most commonly used as a verb meaning to influence, change, or have an impact on something or someone.

For a helpful explanation of the difference between affect and effect, see this guide from Purdue OWL.

Examples

• Lack of sleep can affect your concentration.
• Rain may affect the game.
• The decision will affect many employees.
• Stress can affect your performance.

For example:

Heavy traffic affected my ability to arrive on time.

Here, “affected” means that the traffic influenced or changed the situation.

To That Effect vs Affect: Comparison Table

Feature	To That Effect	Affect
Type	Fixed phrase	Usually a verb
Basic meaning	With a similar meaning or message	To influence or change
Main use	Referring to a previous statement or idea	Describing influence or impact
Example	She made a statement to that effect.	The news affected him.
Common context	Statements, messages, comments, decisions	People, situations, results, conditions
Can they replace each other?	No	No

When Should You Use “To That Effect”?

Use “to that effect” when you are referring to something that communicates the same or a similar idea as something previously mentioned.

Common patterns

statement + to that effect

The director made a statement to that effect.

message + to that effect

We received a message to that effect.

letter + to that effect

The lawyer sent a letter to that effect.

notice + to that effect

The school issued a notice to that effect.

It is especially useful when you do not want to repeat the exact words of an earlier statement.

When Should You Use “Affect”?

Use “affect” when you mean influence, change, or have an impact on something.

Common patterns

affect + person

The news affected her deeply.

affect + situation

The delay affected the schedule.

affect + result

The error affected the final result.

affect + performance

Lack of sleep can affect your performance.

A useful substitution test is to replace “affect” with “influence.” If the sentence still makes sense, “affect” is probably the correct choice.

The weather affected the match.

→ The weather influenced the match.

10+ Examples of “To That Effect” and “Affect”

Examples with “To That Effect”

1. The principal made an announcement to that effect.
2. She sent me an email to that effect.
3. The company released a statement to that effect.
4. I heard a report to that effect.
5. The manager gave instructions to that effect.
6. The letter contained a warning to that effect.

Examples with “Affect”

7. The new rules may affect small businesses.
8. Noise can affect your ability to concentrate.
9. The delay will affect our travel plans.
10. His decision could affect the entire team.
11. Lack of preparation affected her performance.
12. Changes in temperature can affect the equipment.

Common Mistakes

Mistake 1: Using “affect” when referring to a similar statement

Incorrect:

She sent an email affect that.

Correct:

She sent an email to that effect.

Mistake 2: Treating “to that effect” as a verb

Incorrect:

The decision to that effect the employees.

Correct:

The decision affected the employees.

Mistake 3: Confusing “effect” with “affect”

Remember that affect is most commonly a verb, while effect is most commonly a noun.

• The policy affected workers.
• The policy had an effect on workers.

However, “effect” can also be a verb in formal contexts, meaning to bring about something, so the simple rule is useful but not absolute.

Mistake 4: Repeating the entire previous statement

Instead of repeating a long idea, English speakers can use:

The company said it would close the branch and sent a notice to that effect.

This avoids unnecessary repetition.

Memory Trick

Use this simple trick:

To that effect = same idea

Affect = influence

Think:

To that effect → “That same message.”

Affect → “Influence.”

If you can replace the word with “influence,” use affect.

If you are referring back to something someone has said or communicated, “to that effect” may be what you need.

American vs British English

There is no major American-versus-British spelling difference between “to that effect” and “affect.”

Both forms are standard in American and British English.

For example:

• The company made a statement to that effect.
• The changes may affect employees.

The distinction is based on meaning and grammatical function, not regional spelling.

Similar Words and Expressions

Several expressions are related to these words but have different meanings.

To that effect

Means something like “with that meaning” or “expressing a similar idea.”

She made a comment to that effect.

Affect

Usually means “influence” or “change.”

The noise affected my concentration.

Effect

Usually means “result” or “consequence.”

The new rule had a significant effect.

Influence

Means the power to change or affect someone or something.

Parents can influence their children’s habits.

Impact

Means a strong effect or influence.

The decision had a major impact on the business.

Final Verdict

“To that effect” and “affect” are both correct expressions, but they are used in completely different situations.

Use “to that effect” when referring to a statement, message, or idea that expresses the same or a similar meaning.

Use “affect” when you mean to influence, change, or have an impact on something.

The easiest distinction is:

To that effect = similar meaning or message.

Affect = influence or change.

Frequently Asked Questions

Is “to that effect” grammatically correct?

Yes. “To that effect” is a standard English expression used to refer to something that expresses a similar meaning or idea.

What does “to that effect” mean?

It generally means “with that meaning” or “expressing a similar idea.” It is often used after words such as statement, message, comment, letter, or notice.

Is “to that effect” the same as “affect”?

No. “To that effect” refers to a similar meaning or message, while “affect” usually means to influence or change something.

Is it “to that affect” or “to that effect”?

The standard expression is “to that effect.” The phrase uses effect, not affect.

What is an example of “to that effect”?

The manager sent an email to that effect.

This means the email communicated essentially the same idea that had already been discussed.

What is an example of “affect”?

The bad weather may affect our travel plans.

Here, affect means influence or change.

How can I remember affect vs to that effect?

Remember “to that effect” = same message and “affect” = influence. If you can substitute “influence,” the verb affect is likely correct.

Remember This

To that effect → refers to a similar statement, meaning, or message.

Affect → means to influence or change.

Correct: The company issued a statement to that effect.

Correct: The new policy may affect employees.

Incorrect: The company issued a statement to that affect.

Conclusion

The difference between “to that effect” and “affect” becomes much easier once you focus on their functions. “To that effect” is a fixed phrase used to refer to a statement or message expressing a similar idea. It is especially common after words such as statement, message, announcement, and notice.

“Affect,” on the other hand, is usually a verb meaning to influence, change, or have an impact on something. When choosing between them, remember the simple rule: “to that effect” means a similar message, while “affect” means influence. This distinction will help you use both expressions naturally and accurately.