- to make an arrangement on a basis of proportional distribution.
- to divide, distribute, or calculate proportionately.
Origin of prorate
- mainly US and Canadian to divide, assess, or distribute (something) proportionately
Word Origin and History for pro-rated
also pro-rate, "divide proportionally," 1860, American English, verb derived from Latin pro rata (parte) (see pro rata). Related: Prorated; prorating.
To divide or distribute a sum of money proportionately. For example, if one owned an automobile for only three months, an insurance company would prorate the annual premium by charging only one-quarter of it.