Can you please tell me which one is correct: decide the amount or decide on the amount? For example:

I think we need to pay Mike more for the job and I suggest we decide the amount when it's completed.

I think we need to pay Mike more for the job and I suggest we decide on the amount when it's completed.

Are both correct? if so, is there a nuance of difference between the two?

2 Answers 2


Google Books Ngram Viewer indicates that the two phrases are used in pretty much equal measure, but not in all contexts.

Merriam Webster defines the phrasal verb decide on to mean: to choose, typically after giving thought to something. It gives the following examples where the verb decide alone doesn't fit:

He decided on blue rather than green.
I am having trouble deciding on a gift for them.

When it comes to amounts, the preposition/s on/upon are not required but are optional. So you can decide an amount or decide on/upon it.

I cannot think of any distinction or nuances between the two in this context.




When you determine how much you will charge for your service, you have decided the amount [you will charge your customer]. No one else is needed for you to decide the amount [you will charge].

When you are negotiating a cash exchange with a customer, friend, colleague, you and the other individual are deciding on the amount [that will be paid]. Deciding on the amount, means you and someone else are coming to an agreement.

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