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Prepositions after adjectives

OK with or OK for?

OK with usually means accepting or agreeing with something. OK for usually means suitable, safe, or intended for someone or something.

Quick answer

When do we use OK with and OK for?

Use OK with for agreement, comfort, or acceptance. Use OK for suitability, permission, or purpose. The meaning changes with the preposition.

I'm OK with your suggestion.
Is this software OK for beginners?
She was not OK with the decision.
These seats are OK for children.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
OK with + person/idea

Showing agreement or acceptance

Use OK with when someone accepts, agrees with, or feels comfortable about something.

Are you OK with working late tonight?
He's completely OK with the new schedule.
2
OK for + person/purpose

Showing suitability or permission

Use OK for when something is suitable, safe, acceptable, or intended for someone or something.

This restaurant is OK for large groups.
Is it OK for me to leave early?
3
OK with + doing something

Accepting an action

OK with is common before a gerund when someone accepts an action or situation.

She is OK with sharing the office.
We're OK with waiting a little longer.
4
OK for + amount/time

Stating a suitable limit or duration

OK for can describe how long or how much is acceptable.

The ticket is OK for two days.
This battery is OK for about eight hours of use.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
OK with
I'm OK with your plan.
accepting or agreeing with something
OK for
This app is OK for beginners.
suitable or appropriate for someone or something
OK with someone
Are you OK with me joining the meeting?
comfortable with a person's action
OK for someone
Is Saturday OK for you?
convenient or suitable for a person
OK at
She's OK at tennis.
at changes the meaning completely and refers to skill level, not agreement or suitability

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using OK for to mean agreement

Use OK with when talking about acceptance or agreement.

✕ I'm OK for your idea. ✓ I'm OK with your idea.

Using OK with for suitability

Use OK for when something is suitable or intended for a purpose.

✕ This chair is OK with children. ✓ This chair is OK for children.

Confusing permission and agreement

OK for often refers to permission or appropriateness, while OK with refers to personal acceptance.

✕ Are you OK for me using your laptop? ✓ Are you OK with me using your laptop?

Using OK with before a time expression

Use OK for when talking about convenient times or dates.

✕ Is Friday OK with you for the interview time? ✓ Is Friday OK for you?

Quick practice

Choose the expression that matches the intended meaning.

1. I'm completely ___ the new policy.
2. This guide is ___ first-year students.
3. Are you ___ me borrowing your car tonight?

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Frequently asked questions

Can OK with and OK for mean the same thing?

Sometimes both are possible, but the meaning changes. OK with shows acceptance, while OK for shows suitability or convenience.

Do native speakers use OK and okay differently?

No major difference exists in meaning. OK and okay are both common spellings.

Can I say OK for you?

Yes. OK for you commonly means convenient or suitable for someone, as in Is tomorrow OK for you?

obedient-to-unto-in-by, of "objective in" or "objective about"? "obligatory for" or "obligatory on"? "oblivious to" or "oblivious of"? observable in, by, from, to or on? obsessed with, by, about, in or over? obsessive about, in, over, with or to? "obsolete in" or "obsolete by"? "obtainable in" or "obtainable from"? "obvious to", "obvious from" or "obvious in"? odd to, for, about, in or on? offensive to, in, against, on or about?

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