A lease where the tenant pays its base rent and additional rent to cover some or all of the expenses related to the leased real property. Typical expenses include taxes, insurance, and maintenance charges.

The scope of the tenant's additional rent payment obligations depends on the kind of net lease negotiated between the parties. Net leases can be further classified as one of the following:

However, as leasing practices have evolved, and depending on the property's location or local custom, the terms net lease and triple net lease are often used interchangeably, describing a lease where the tenant pays all or its proportionate share of taxes, insurance, and maintenance charges, usually together with other operating expenses.