Idiom B1 Informal

A penny for your thoughts

A gentle, friendly way of asking someone what they are thinking about, especially when they seem quiet or lost in thought

Meaning

A penny for your thoughts — A gentle, friendly way of asking someone what they are thinking about, especially when they seem quiet or lost in thought. It warmly invites the other person to share what is on their mind.

Origin & History

The phrase dates back to the 16th century and was recorded by Sir Thomas More in his writing of 1535. In that period a penny was a meaningful amount of money rather than a trivial coin, so offering one in exchange for someone's thoughts was a playful way of saying their ideas were worth paying for.

Over the centuries the literal value of a penny fell, but the warmth of the expression remained. It is now a light, affectionate way of coaxing a quiet or thoughtful person into conversation. The wording has stayed remarkably stable, and the idiom is still heard daily in friendly British and international English.

Example Sentences

SentenceContext
You've gone very quiet. A penny for your thoughts?Gently asking a friend
She sat smiling to herself, so I asked, "A penny for your thoughts?"Curiosity
A penny for your thoughts — you look as if something is bothering you.Showing concern
He stared at the sea for a long time, and finally his wife said, "A penny for your thoughts."A quiet moment
You haven't said a word all evening. A penny for your thoughts?Encouraging conversation
Whenever I daydream in class, my friend whispers, "A penny for your thoughts."Lighthearted teasing

How to Use It

This idiom is informal and works best in friendly conversation, usually as a question. Use it when someone seems quiet, distracted, or deep in thought and you want to invite them to share what they are thinking. It is warm and gentle, so it suits people you know well rather than formal or professional situations.

Common Mistakes

Mistakes to Avoid

A penny for your thought?

A penny for your thoughts? — The noun is always the plural 'thoughts'.

A penny for your mind?

A penny for your thoughts? — The fixed word is 'thoughts', not 'mind'.

Penny for thoughts?

A penny for your thoughts? — Do not drop the article 'a' or the word 'your'.

Similar Idioms

What's on your mind What are you thinking Lost in thought Deep in thought All Idioms →

Practise This Idiom

Flash Cards Flip Tiles

Practice English Idioms

Use these exercises to master idioms in context:

Flip Tiles Find the Match Idioms Quiz

Frequently Asked Questions

What does "A penny for your thoughts" mean?
"A penny for your thoughts" is a gentle, friendly way of asking someone what they are thinking about, especially when they seem quiet or lost in thought. It invites the other person to share what is on their mind.
Where does the idiom "A penny for your thoughts" come from?
The phrase dates back to the 16th century and was recorded by Sir Thomas More in 1535. At that time a penny was a meaningful sum of money, so offering one for someone's thoughts was a playful way of valuing what they were thinking.
Can you give an example of "A penny for your thoughts" in a sentence?
Here is an example: "You've been staring out of the window for ages. A penny for your thoughts?" — used to invite a quiet person to share what is on their mind.
Is "A penny for your thoughts" formal or informal?
It is informal. It is common in friendly, everyday conversation between people who know each other, but it is best avoided in formal academic or official writing.
What CEFR level is "A penny for your thoughts"?
This idiom is typically taught at B1 level. It is an intermediate expression that appears often in spoken English and informal writing when gently asking what someone is thinking.
What are common mistakes with "A penny for your thoughts"?
A common mistake is changing the noun to the plural 'thoughts' into a singular 'thought', or saying 'a penny for your mind'. Another is dropping the article and saying 'penny for thoughts'. The fixed form is 'a penny for your thoughts'.
What idioms are similar to "A penny for your thoughts"?
Similar expressions include: What's on your mind, What are you thinking, Lost in thought, Deep in thought. These all relate to a person's private thoughts or to asking about them.
How do I practise idioms like "A penny for your thoughts"?
LexFizz's Flash Cards and Flip Tiles exercises are great for practising English idioms. Try writing your own example sentences using the idiom in context, and listen for it in films, podcasts, and conversations.
Can "A penny for your thoughts" be used in writing?
Yes, in informal writing, dialogue, and stories. Avoid it in formal academic writing unless you are quoting or discussing the idiom itself. In everyday writing it is a natural and warm choice.
Does "A penny for your thoughts" have the same meaning in British and American English?
Yes, "A penny for your thoughts" is understood in both British and American English with the same meaning: a friendly way of asking what someone is thinking. The idiom is widely recognised across all major varieties of English.