Triple Net Lease Calculator

Background.

A reader arrives at Triple Net Lease Calculator to add base rent and the tenant's entered tax, insurance and maintenance pass-throughs. A triple-net lease shifts specified property expenses to the tenant, but the exact responsibility comes from the lease. For that reason, this page names its convention as “tenant occupancy cost = base rent + passed-through property tax + insurance + maintenance.”

The editable entries are annual base rent, annual property taxes passed through, annual insurance passed through, annual maintenance passed through. Use values from the document or measurement that governs this triple net lease question; the defaults are only the worked fixture below. Before relying on the number, check this triple net lease boundary: capital repairs, management fees, audit rights, gross-up clauses and expense caps are not inferred.

Fannie Mae Selling Guide B3-3.1-08, Rental Income; documented gross and net rental-income treatment documents the convention or governing rule used here. The triple net lease output is a transparent scenario under those facts: it does not manufacture an unentered market price, professional determination, carrier quote, legal eligibility finding or locally adopted code value.

What is triple net lease calculator?

Triple Net Lease is the relationship behind this decision: a triple-net lease shifts specified property expenses to the tenant, but the exact responsibility comes from the lease. On this page it means tenant occupancy cost = base rent + passed-through property tax + insurance + maintenance. Capital repairs, management fees, audit rights, gross-up clauses and expense caps are not inferred; that is the line between the reported quantity and a broader real estate analysis.

How to use this calculator.

1. 01Confirm that “tenant occupancy cost = base rent + passed-through property tax + insurance + maintenance” matches the triple net lease convention you need.
2. 02Replace the fixture values for annual base rent, annual property taxes passed through, annual insurance passed through, annual maintenance passed through with dated values from the governing record.
3. 03Keep all currencies, measurement units and time periods on the same basis before calculating.
4. 04Read total annual tenant occupancy cost together with this boundary: Capital repairs, management fees, audit rights, gross-up clauses and expense caps are not inferred.

The formula.

The calculation uses tenant occupancy cost = base rent + passed-through property tax + insurance + maintenance. In this triple net lease model, the entered terms are annual base rent, annual property taxes passed through, annual insurance passed through, annual maintenance passed through. A triple-net lease shifts specified property expenses to the tenant, but the exact responsibility comes from the lease, which is why the relationship is presented under this name rather than as a universal alternative. Capital repairs, management fees, audit rights, gross-up clauses and expense caps are not inferred. Calculations keep full decimal precision through the relationship and round only the returned display values.

A worked example.

Frequently asked questions.

References& sources.

1. [1]Fannie Mae Selling Guide B3-3.1-08, Rental Income; documented gross and net rental-income treatment. Retrieved 2026-08-07. access: open unless marked otherwise.
2. [2]Freddie Mac, Modeling Multifamily Potential Rental Income; current rent roll, concessions and vacancy treatment. Retrieved 2026-08-07. access: open unless marked otherwise.
3. [3]Financial Accounting Standards Board. Accounting Standards Codification. Retrieved 2026-08-07. independence: primary; access: open.
4. [4]Building Owners and Managers Association International. Commercial real estate measurement and operating standards. Retrieved 2026-08-07. independence: secondary-check; access: open.
5. [5]National Association of Realtors. Research and statistics. Retrieved 2026-08-07. independence: secondary-check; access: open.