A tenant improvement allowance, also known as a TI allowance, is an amount of money provided by a landlord to a tenant to pay for the cost of improvements to a commercial property. The landlord typically provides the tenant with a lump sum payment or a line of credit to cover the costs of the improvements. This allows the tenant to customize the space they are renting to suit their needs while the landlord is able to maintain control over the quality and cost of the improvements. 

^{Source: Commercialrealestate.loans}