A limit in an insurance policy stipulating the most it will pay for all covered losses sustained during a specified period of time, usually one year. Aggregate limits are commonly included in liability policies. While not often used in property insurance, aggregates are sometimes included with respect to certain catastrophic exposures, e.g., earthquake and flood.

The dollar amount of reinsurance coverage during one specified period, usually 12 months, for all reinsurance losses sustained under a treaty during such period.