Owner guide

Net Effective Rent Calculator for Commercial Leases

Published August 7, 2026 · By Mark Kvetkovskiy, CCIM

A blank notepad with a fountain pen, the quiet of working out a lease's true numbers by hand.

This proposal pays you

$7,750.00a month, every month of the term

Same number stretched over a year: $93,000.00

Income

Base rent ofa month, plusa month of NNN, formonths. Each year the base rises, and the NNN rises.

Expenses

You give,in other concessions and cash,to the broker, andof TI allowance/construction funds into the space.

Other

Money is wortha year to you (discount rate). The space isSF.

Where the scheduled rent goes — pick one to see it

Scheduled: $600,000.00Yours: $465,000.00Given back: $135,000.00

How that number was reached

Over the whole termPer SF/yrAmount
Rent scheduled to be paid$0.00$600,000.00
Free rent forgiven$0.00$60,000.00
Other concessions and your cash$0.00$75,000.00
Leasing commission$0.00$0.00
TI / construction allowance$0.00$0.00
Everything you give back$0.00$135,000.00
What is left over the term$0.00$465,000.00
Divided by the months in the term$7,750.00

Methodology and limits

What this counts. Base rent and NNN, each grown by its stated yearly rise and summed month by month across the term. Base-free months forgive base rent while NNN still flows; total-free months forgive both. Concessions, cash, commission, and TI count in full at signing. Commission figures on a flat fee, months of base rent, or a share of total base rent, as picked. The discount rate values each month’s net flow in today’s money. The present value of the lease, the return on the deal (IRR), the months to break even, and the concessions per square foot follow the same net cash flows. Per-SF figures divide the yearly pace by the entered square feet.

What it doesn’t. Operating costs beyond the entered NNN, recoveries, downtime between tenants, and escalations beyond the stated yearly rises. Time value beyond the stated discount rate. No tax, legal, or enforceability conclusions. It doesn’t read the proposal for you — enter only agreed figures, and record the document date and version beside the result so a second proposal run the same way is comparable.

Stays here. Nothing you type is sent or saved. Send opens an email draft you control; Download writes a file to your device.

Opens an email draft to [email protected]. Nothing is sent until you press Send.

Downloads your proposal as a PDF. Nothing is sent.

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