Commercial Lease Calculator

Background.

An asking rent of 24 a square foot sounds like a price, but in commercial property it is often only part of one. The quote is usually annual and per square foot, and whether it covers the building's running costs depends on how the lease is structured. Under a full-service gross lease the landlord pays property taxes, insurance and common-area upkeep out of the rent. Under a triple-net lease the tenant pays its share of all three on top, typically as monthly estimates that are trued up after the year closes. Two spaces with the same headline rate can therefore cost quite different amounts to occupy.

The fair comparison is occupancy cost: base rent plus operating expenses, multiplied by the area you are billed for. Enter the leased area, the annual base rent per square foot and the annual operating expense per square foot the landlord estimates or passes through, and the page returns the yearly total and its monthly average.

Two cautions shape how to read it. The area should be the one the rent is charged on, which for offices is normally rentable area — your suite plus a slice of the lobbies, corridors and washrooms — not just the space you can furnish. And the result is a one-year snapshot. Annual escalations, rent-free months, percentage rent on retail sales, separately metered utilities, deposits and anything particular to the lease wording sit outside the sum, so a multi-year commitment deserves a year-by-year schedule built from the lease itself.

What is commercial lease calculator?

Annual occupancy cost is what a tenant pays each year to hold a commercial space, counting both base rent and the share of the property's operating expenses charged to the tenant. Here it is the leased area in square feet multiplied by the sum of two annual rates, each in currency per square foot per year; the monthly figure is that total divided by twelve. It is a cash budgeting number, separate from the lease liability and right-of-use asset that ASC 842 and IFRS 16 require a lessee to record.

How to use this calculator.

1. 01Enter the leased area in square feet — the area the rent is charged on, which for office space is usually rentable rather than usable area. If you only have square metres, multiply by 10.764.
2. 02Enter the annual base rent per square foot. If a listing quotes rent per square foot per month, multiply it by 12 first so that both rates are annual.
3. 03Enter the annual operating expenses per square foot: the landlord's estimate of taxes, insurance and common-area maintenance billed to you, ideally checked against last year's actual figure. On a full-service gross lease enter only charges billed on top of the rent. The field needs a value above zero.
4. 04Read the annual occupancy cost and the average monthly figure, and compare competing spaces on this total rather than on base rent alone.

The formula.

Annual cost = A × (R + E), where A is the leased area in square feet, R is the annual base rent per square foot and E is the annual operating expense per square foot charged to the tenant. Adding the two rates first gives an all-in rate per square foot — 32 in the default case — and multiplying by area turns it into money per year. The monthly figure is the same total divided by 12: an average, not a billing schedule, because real invoices shift when expense estimates are reconciled. Area multiplies both rates, so it moves the answer most: if rent is charged on rentable area 15% larger than your usable space, the cost is 15% higher than a usable-area sum suggests. Both rates must be on the same basis, annual and per square foot, and all three inputs must be positive.

A worked example.

Frequently asked questions.

References& sources.

1. [1]FASB Accounting Standards Codification Topic 842, Leases (BIBLIOGRAPHIC/PAYWALL).
2. [2]IFRS Foundation, IFRS 16 Leases.
3. [3]BIPM, The International System of Units (SI Brochure), 9th ed., version 3.01, coherent derived units and quantity equations.