before you rent
What Does One Month Free Rent Actually Mean?
For Renter Numbers' calculation, one free month is a concession equal to one entered month of base rent. Subtract that amount from gross base rent for the full lease, then divide by the lease term to get a normalized monthly figure. The written offer determines whether the concession appears as a skipped payment, credit, or another payment schedule.
Use the Effective rent calculatorWhat does one month free mean mathematically?
The phrase describes a concession, but the exact written offer matters. In this guide's example and in the Renter Numbers calculator, one full free month has the same value as one entered month of base rent. The calculation does not infer which invoice receives the credit.
(base rent x lease months - one month of base rent) / lease months
= normalized monthly base-rent figureThis is Renter Numbers' defined comparison method, not a claim that every property uses identical terminology or billing.
Concession value versus payment timing
Concession value answers how much base rent the offer removes from the entered lease term. Payment timing answers when that reduction appears. Rental-industry explanations describe free-rent concessions being averaged into a net-effective figure, while also warning renters to read the lease to understand the actual monthly rent and timing.
- Check whether the offer names a specific free month.
- Check whether it describes a dollar credit or reduced installments.
- Check the base rent due in months without the concession.
- Check whether the concession has written conditions outside this calculator's scope.
Worked example: one free month on a 12-month lease
At $2,400 per month, 12 months of gross base rent total $28,800. One entered free month removes $2,400, leaving $26,400 of net base rent. Dividing by all 12 lease months produces $2,200 as a normalized monthly base-rent figure.
| Figure | Amount | What it answers |
|---|---|---|
| Base rent | $2,400 | The stated monthly base-rent amount |
| Concession value | $2,400 | The entered value removed from term base rent |
| Net base rent | $26,400 | Base rent remaining across the term |
| Normalized figure | $2,200 | Term base-rent cost divided by 12 |
Why required fees can remain due
A base-rent concession does not automatically remove utilities, parking, insurance, amenity charges, or other required fees. Confirm which charges remain due during the concession period. Add only disclosed mandatory nonrefundable charges when you model an all-in scenario.
Questions to check in the lease offer
- What base rent is stated before the promotion?
- What exact concession amount or free period is written?
- When and how is the concession applied?
- Which recurring charges remain due?
- Does the written offer include conditions that require separate review?
Calculate the effective rent
Use the Effective Rent and Concessions Calculator to model the disclosed offer. Once the offer is normalized, use the Apartment Cost Comparison Calculator as the next decision to compare it with another complete option.
Worked example
Suppose an offer lists $2,400 base rent for a 12-month lease with one full free month and no other concession.
$2,400 x 12 = $28,800$28,800 - $2,400 = $26,400$26,400 / 12 = $2,200$2,200 is the term-normalized figure. It is not necessarily the amount charged on each monthly invoice.
Sources and review
Last reviewed: . Reviewed by Camillus Alemoh.
- Net Effective Rent: What Does It Mean and How Much Do You Really Pay?, StreetEasy. Accessed 2026-08-12.
- What is net effective rent vs. gross rent?, Brick Underground. Accessed 2026-08-12.
- Lease and Rental Rate Terminology, NAIOP Research Foundation. Accessed 2026-08-12.