Net Effective Rent Calculator
Net Effective Rent Calculator
Translate face rent, free months, tenant allowances, and monthly operating costs into a comparable monthly and annual rent figure.
Lease assumptions
Enter the economics stated in the lease. Results update as you type.
Use the full contractual term. Years are converted to whole months.
Face rent before concessions and operating costs.
Full months for which no base rent is collected.
One-time landlord-funded credit or improvement allowance.
Recurring monthly landlord costs, entered as a share of face rent or as dollars.
Lease value allocation
See how scheduled rent is divided between retained income, concessions, and operating costs.
Cumulative lease cash flow
Compare scheduled gross rent with cumulative landlord net cash and cumulative deductions.
Monthly lease schedule
A transparent month-by-month view of billed rent, costs, concessions, and cumulative net cash.
| Month | Gross scheduled | Rent billed | Cash allowance | Operating cost | Net cash | Cumulative net |
|---|
Area-based calculation options
Enter usable or rentable area consistently with the lease quote.
Changing the area unit converts area, rent rate, and allowance rate so total economics stay unchanged.
What does net effective rent estimate?
Net effective rent, or NER, converts a lease with concessions and landlord expenses into a single comparable rent figure. The monthly result is the average amount retained per lease month after subtracting free-rent value, a tenant cash allowance, and recurring operating costs. The annual result multiplies that monthly average by 12, even when the actual lease is shorter or longer than one year.
This calculator uses a straight-line, undiscounted approach. It is designed for fast comparison of lease offers rather than present-value accounting. A long-term commercial lease may also require discounting, rent escalations, recoveries, taxes, common-area maintenance rules, and accounting treatment under the applicable lease standard.
How should each input be used?
Lease term is required and should cover the complete contractual period. Enter months directly or select years; the calculator converts years to the nearest whole month. A longer term usually spreads a fixed allowance across more months, which raises NER relative to an otherwise identical shorter lease.
Monthly rent is the face or base rent before concessions. It is required for a meaningful result. In area mode, enter the monthly rate per square foot or square meter instead of the property-wide total. A higher face rent increases scheduled rent and usually increases NER dollar for dollar, unless operating costs are entered as a percentage.
Rent-free months is the count of full months with no base rent collection. It may be zero but cannot exceed the lease term. Each additional free month reduces total lease income by one full month of face rent.
Tenant cash allowance is a one-time landlord-funded credit, improvement allowance, or reimbursement. Enter the total amount, or a rate per area when area mode is enabled. Avoid double-counting the same incentive as both free rent and cash allowance.
Operating costs are recurring monthly landlord expenses attributable to the lease. Select a percentage of face rent or a fixed dollar amount per month. Percentage mode moves with rent; fixed-dollar mode does not. For tax reporting, expense classification can differ from this economic comparison, so consult the current IRS guidance for residential rental property where relevant.
How is the formula calculated?
Monthly NER = [Monthly rent × (Lease months − Free months) − Tenant allowance − (Monthly operating cost × Lease months)] ÷ Lease months
The annual NER is monthly NER × 12. Gross scheduled rent is face rent × lease months. Total concessions equal free-rent value plus the cash allowance. The effective discount compares annual NER with gross annual face rent and therefore includes both incentives and operating costs.
Area-based rates do not change the economics. The calculator first converts the rent rate and allowance rate into property-wide totals using the entered area, performs the same NER calculation, and then divides the results by area to show monthly and annual rates per square foot or square meter.
For research on why effective rent can be a better comparison metric than headline rent, see the University of California paper The Measurement of Effective Rent. The paper also illustrates why timing and valuation assumptions matter in more advanced analyses.
How should the results be interpreted?
Monthly NER is the principal comparison number. A positive value means the lease retains income after modeled deductions. Zero means concessions and costs consume all rent. A negative value means the modeled landlord outflows exceed collected rent over the term.
Annual NER standardizes the monthly result to a 12-month period. Net income over lease is the actual modeled total retained across the entered term. Gross scheduled rent shows the no-concession face-rent benchmark.
Rent concessions combines rent-free value and the tenant allowance. Operating costs over lease isolates recurring modeled expenses. Effective discount shows how far annual NER falls below annual face rent. A larger percentage can make leasing more competitive but reduces economic rent.
In area mode, the per-area outputs help compare different-sized spaces. Always use the same area convention across alternatives: rentable area and usable area are not interchangeable.
What do the chart and schedule show?
The allocation donut reconciles gross scheduled rent into retained lease income, rent-free value, tenant allowance, and operating costs. Every visible segment, legend amount, and percentage comes from the same live model. If deductions exceed scheduled rent, the donut is replaced by a compact message because a negative segment cannot be represented honestly.
The cumulative chart compares gross scheduled rent, cumulative net cash, and cumulative deductions. The schedule assumes free months come first and the allowance is paid in month 1. These timing choices help visualize cash flow but do not change the straight-line NER result. Review the monthly table to see the exact source values behind the chart.
Common mistakes include using a marketing concession period that differs from the legal lease term, treating “eight weeks free” as exactly two months, omitting recurring landlord costs, mixing monthly and annual quotes, or comparing per-square-foot and per-square-meter rates without conversion. For formal financial statements, confirm the relevant requirements with the Financial Accounting Standards Board lease resources or the applicable local standard.