pro rata

adverb

pro ra·​ta (ˌ)prō-ˈrā-tə  -ˈrä-  -ˈra- 

: proportionately according to an exactly calculable factor (such as share or liability)

pro rata adjective

Did you know?

The Latin phrase prō ratā, meaning "in proportion," is a shortening of prō ratā parte/portiōne, meaning "according to the fixed proportion." English users borrowed the shorter phrase in the 16th century, dropping the diacritics along the way, and began applying the term in contexts formal enough that Latin doesn't seem too out of place: in finance and law. There pro rata refers to distributing or allocating a quantity proportionately—for example, dividing up an annual interest rate pro rata into monthly rates; distributing pro rata a profit amongst shareholders; paying part-time employees pro rata (according to full-time pay); or allocating liability for a defective product pro rata. In the early 19th century, pro rata demonstrated its usefulness as an adjective, as in "a pro rata share" or "pro rata distribution." The verb prorate (based on pro rata) followed soon thereafter. Incidentally, the familiar noun and verb rate (as in "tax rates" and "rating on a scale of 1 to 5") also trace back to Latin prō ratā parte, but they entered the language back in the 15th century by way of Anglo-French.

Examples of pro rata in a Sentence

Recent Examples on the Web

Passive indices hold to their prescribed rules and buy or sell in a pro rata fashion as dollars flow in or out. —Joel Shulman, Forbes, 14 Oct. 2024

The transaction was expected to be executed through distribution of shares of the Worldpay to FIS shareholders on pro rata basis. —Joe Cornell, Forbes, 28 Mar. 2024

The separation will occur through a pro rata distribution by 3M of at least 80.1% of the outstanding shares of the common stock of Solventum. —Joe Cornell, Forbes, 27 Feb. 2024

Or even simpler, a pro rata dividend to the whole population, which is actually going to reduce the regressivity because there are more poorer people than rich people. —Tax Notes Staff, Forbes, 13 Feb. 2024

Word History

Etymology

Latin

First Known Use

1575, in the meaning defined above

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Kids Definition

pro rata

adverb

pro ra·​ta (ˈ)prō-ˈrāt-ə  -ˈrät-ə 

: in proportion to the share of each : proportionately

pro rata adjective

Legal Definition

pro rata

adverb

pro ra·​ta ˌprō-ˈrā-tə, -ˈrä-, -ˈra- 

: proportionately according to an exactly calculable factor (as share or liability)

pro rata adjective

Etymology

Latin