# buy into

CEFR B2 · Phrasal verb

Source: https://englishreference.com/word/buy-into
Updated: 2026-10-22

## Definition

to believe in an idea or plan and accept it as true. You use this when you decide to support a specific way of thinking.

For teachers: to accept or believe in a concept, theory, or plan, often one that is being promoted by others. The verb is transitive and requires an abstract object.

## Examples

- I don't buy into the idea that we need a new car.
- Although the marketing campaign was clever, many consumers didn't buy into the brand's new image.
- It remains to be seen whether the electorate will buy into the candidate's radical economic reforms before the upcoming election.

## Pitfalls

- Not "I don't buy in the idea." but "I don't buy into the idea." — Learners often confuse 'buy into' with 'buy in', which usually refers to joining a game or making a financial investment.

## Usage notes

- Often used in the negative to show skepticism toward a popular trend or theory.
- Teaching tip: Useful for business English lessons; it implies a level of commitment or investment in an idea, similar to buying shares in a company.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.