Pro Rata

What Is Pro Rata?

Pro rata is a Latin phrase meaning "in proportion." In investing and accounting, it describes splitting something, such as a payment, a share allocation, or a cost, among several parties according to each party's share of the whole. Instead of every person receiving the same fixed amount, each receives a portion that matches how much they hold or contributed.

How Pro Rata Works

The amount each party receives depends on their fraction of the total. If a shareholder owns a certain percentage of a company's outstanding shares, a pro rata distribution gives that shareholder the same percentage of the amount being distributed. The basic calculation looks like this:

Individual amount = (holder's stake ÷ total stake) × amount to distribute

Pro rata treatment appears in many settings. In a rights offering, existing shareholders are generally offered the right to buy new shares in proportion to what they already own. When a dividend is paid, each shareholder receives an amount per share, so larger holders collect larger totals. When an offer is oversubscribed, such as a tender offer that accepts only part of the shares offered, accepted shares are often allocated pro rata. The term can also describe a fraction of a periodic amount for a partial period, such as the portion of a yearly fee or accrued interest that applies to a few months.

Why It Matters to Investors

Pro rata treatment helps keep existing owners' positions fair relative to one another. A rights offering, for example, lets a holder maintain their percentage ownership if they choose to participate. Investors may also encounter pro rata allocation when demand exceeds supply in a initial public offering or when a bankruptcy court distributes assets among creditors in the same class. The exact rules vary by situation, security, and jurisdiction, so the governing documents for a particular offering or proceeding are the reliable source for how pro rata treatment is applied.