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  • pro rata
    pro rata
    adverb
    in proportion; according to a certain rate.
  • pro-rata
    pro-rata
    adjective
    proportionately determined.
Synonyms

pro rata

1 American  
[proh rey-tuh, rah-] / proʊ ˈreɪ tə, ˈrɑ- /

adverb

  1. in proportion; according to a certain rate.


pro-rata 2 American  
[proh-rey-tuh, -rah-] / proʊˈreɪ tə, -ˈrɑ- /

adjective

  1. proportionately determined.

    a pro-rata share of income.


pro rata British  
/ ˈprəʊ ˈrɑːtə /
  1. in proportion

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of pro rata

First recorded in 1565–75, pro rata is from Medieval Latin prō ratā

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

There is one wrinkle, he adds: The pro rata rule.

From MarketWatch • Apr. 9, 2026

Burdis says it is possible that redemption requests at some might exceed the threshold of 5% of assets, after which Blue Owl is allowed to only honor them partially, in a pro rata fashion.

From Barron's • Dec. 10, 2025

In that case, you’d only owe pro rata rent through the date when you vacate the unit and a landlord couldn’t charge you any fines or fees for terminating the lease.

From Seattle Times • Feb. 20, 2024

The fund will be divided among the qualified claimants on a pro rata basis, depending on how much they were overcharged by the DWP.

From Los Angeles Times • Aug. 9, 2023

It has been suggested that the effect of the act is to make the realty chargeable pro rata with the personalty, but this is doubtful.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" by Various

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