Effective Rent, Explained: Concessions, Free Months, and Broker Fees

When a listing advertises "$4,000/month, one month free," it is not a $4,000 unit. Face rent - the number on the listing - is a marketing figure. Effective rent - what the renter actually pays per month across the lease - is the economic reality. Confusing the two leads both renters and owners to misread the market.

The basic formula

Effective rent spreads the concessions across the full lease term:

Effective rent = (Face rent × lease months - total concessions) ÷ lease months

A $4,000 unit with one month free on a 12-month lease:

• Total face rent: $4,000 × 12 = $48,000
• One month free: -$4,000
• Net: $44,000 ÷ 12 = $3,667 effective

That is an 8.3% gap between the sticker and the truth.

Net effective vs. gross

Some listings spread the free month over 13 months of occupancy instead of 12, which lowers the effective number further while keeping the renter slightly longer. Always confirm which lease length the "net effective" figure assumes.

Don't forget the fees

Concessions are only half the picture. Up-front costs change the real first-year cost meaningfully:

• Broker fee - where it applies, this can add the equivalent of a month or more, paid day one.
• Security deposit - recoverable, but it is cash out at signing.
• Move-in fees - often non-refundable, and easy to overlook.

A unit with a lower face rent but a full broker fee can cost more in year one than a slightly higher "no-fee" unit. Run the all-in number.

Why owners should care

Face rent protects your comps and your renewal ceiling, which is why concessions are usually the smarter lever than a permanent cut. But you should always know your own effective number - because that is what the market is actually clearing at, and pretending otherwise is how owners misprice the renewal.

Use the calculator

Botway's effective rent calculator takes face rent, free months, broker fee, and lease length and returns the true monthly economics for both sides of the deal - so nobody is negotiating against a number that isn't real.

Sources

This article presents a mathematical formula and a worked arithmetic example (verified by recalculation: $4,000 × 12 = $48,000; $48,000 - $4,000 = $44,000; $44,000 ÷ 12 = $3,666.67, an 8.3% gap from face rent). It makes no statutory, regulatory, or jurisdiction-specific legal claims requiring an external citation.