Each time a future advance is made, additional nonrecurring tax shall be paid on the amount of the advance. The important feature is that the mortgage secures frequent and routine future advances to be added to the loan balance.A future advance is a clause in a mortgage that provides for additional availability of funds under the loan contract without requiring another loan. A future advance is a common clause added to loan agreements that allows the borrower access to additional funds under the same loan agreement. Fill out the form to access a sample of Practical Guidance. Provisions Extending the Lien to Future Advances and Antecedent Indebtedness, 26 ARK. A primer on priority of interest in the face of commercial mortgage modifications and future advances in the State of Florida.