Is the additional-rent
charge correct?
Enter the building costs from the landlord’s statement, your share of the building and what you already paid. The tool rebuilds the math, shows a balance or credit and flags the items that still need to be checked against the lease.

Enter the building costs and your lease details.
The sample numbers show how the tool works. They are not market data and do not say what your lease allows the landlord to charge.
What do these terms mean?
Your area is the rentable square footage in your lease. Building area is the total area used to calculate your percentage share.
Gross-up adjusts certain variable costs as though the building were more fully occupied. Use it only when the lease and statement support it.
Estimates paid are the additional-rent payments already made during the year. The final result subtracts them from the rebuilt annual share.
Add each cost and say how the lease treats it.
Estimated amount still owing.
See what happened to every cost.
“Adjusted building amount” shows any gross-up or yearly share of a capital cost before your area percentage is applied. A direct charge is assigned to the tenant without using the area percentage.
Check these items before accepting the result.
These are math and document questions. They do not decide what the lease legally allows.
Continue with source-document review, invoice sampling, tax support, allocation-pool verification and professional advice.
The math cannot decide whether a cost is allowed by the lease.
- Every amount and recovery treatment is user-entered and must be checked against the executed lease and statement support.
- The model applies arithmetic allocation rules only; it does not determine whether a cost is legally recoverable or reasonable.
- GST/HST and input-tax-credit treatment are excluded unless already included in an entered amount.
- Gross-up, caps, administration fees and capital amortization are applied only when the user selects or enters them.
- The next-year budget is a simple growth scenario, not a landlord budget, forecast or market estimate.
Build the annual recovery file.
Use the Canadian guide to organize the lease clauses, statement support, allocation evidence, invoice sampling and questions behind the calculation.