You’d think the answer to “when does a commercial lease start” would be straightforward — you sign the lease, you move in, the lease starts. But in commercial real estate, the relationship between lease execution, lease commencement, and rent commencement is more nuanced than most tenants expect — and misunderstanding it can affect your budget, your business planning, and your legal rights in ways that matter.
Here’s a clear explanation of how commercial lease timing works and what to watch for in your own lease agreement.
The Three Key Dates in a Commercial Lease
1. Lease Execution Date
The lease execution date is the date on which both landlord and tenant have signed the lease agreement, making it legally binding. This is the date the contract exists — but it’s not necessarily the date the lease term begins or the date rent starts.
2. Lease Commencement Date
The lease commencement date is the date on which the lease term officially begins — from which the lease duration is measured and most lease obligations activate. This is often different from the execution date, particularly when build-out or landlord work is involved.
The lease commencement date can be defined in several ways:
- Fixed date: A specific calendar date stated in the lease — simple and predictable
- Condition-based: The date on which a specified condition is met — typically substantial completion of the landlord’s work or delivery of the premises in agreed condition
- Estimated date with adjustment: The lease states an estimated commencement date and provides a mechanism for adjusting it if the landlord’s delivery is delayed
3. Rent Commencement Date
The rent commencement date is the date on which the tenant’s obligation to pay rent begins. This is frequently — and importantly — different from the lease commencement date.
In many commercial leases, particularly those involving build-out, the rent commencement date is delayed beyond the lease commencement date to allow the tenant time to complete their improvements and begin operations before rent begins. This delay is commonly called a free rent period or rent abatement period.
How Build-Out Affects Lease Start Timing
One of the most common sources of confusion around commercial lease commencement involves build-out periods. Here’s how it typically works:
- Landlord delivers the space in the agreed condition — often “vanilla shell” (bare concrete, exposed ceiling, stubbed utilities) or “warm vanilla shell” (finished ceiling, HVAC connected, but no interior improvements)
- Tenant’s contractor begins build-out — installing partitions, finishes, technology infrastructure, and specialty items
- Lease commencement may be triggered by delivery of the space, regardless of whether build-out is complete
- Rent commencement is typically delayed until a specified number of days after lease commencement — giving the tenant time to complete build-out and begin generating revenue before rent obligations begin
The length of the rent-free period is a critical negotiating point. In the current office market, I’ve helped tenants negotiate free rent periods of six months or more on longer-term leases — a meaningful economic benefit that should be captured in your initial negotiation.
Common Lease Commencement Scenarios
Scenario 1 — Fixed Commencement Date
The simplest structure: the lease commences on a specific date regardless of build-out status. Rent may commence on the same date or after a defined free rent period. Best for spaces that require minimal build-out or where the tenant is taking the space as-is.
Scenario 2 — Commencement Upon Delivery
The lease commences when the landlord delivers the space in the agreed condition. The landlord has a defined obligation to deliver by a certain date, with remedies (including potentially a tenant termination right) if delivery is significantly delayed. Common when the landlord is performing significant work before turnover.
Scenario 3 — Commencement Upon Tenant’s Opening
Some retail leases — particularly in shopping centers — define commencement as the date the tenant opens for business, aligning the landlord’s income with the tenant’s operational readiness. This structure requires careful definition of what constitutes “opening” and what happens if the tenant delays.
What to Negotiate Around Lease Commencement
Landlord Delivery Delay Remedies
If the lease commencement is conditioned on landlord delivery, negotiate clear remedies for delay — including rent abatement for each day of delay beyond a defined outside delivery date, and a tenant termination right if delivery is delayed beyond a defined outside date.
Fixturization Period
A fixturization period — time provided for the tenant to begin build-out before the lease formally commences and before any rent obligation begins — is valuable for tenants with significant build-out requirements. Negotiate this period clearly into your lease.
Outside Commencement Date
Define a date beyond which, if the space hasn’t been delivered, the tenant has the right to terminate the lease and recover any deposits. This protects you from indefinite limbo if a landlord’s construction or prior tenant holdover creates extended delays.
Commencement Certificate
Many commercial leases require the tenant to sign a Commencement Certificate — a document confirming the actual commencement date, rent commencement date, and lease expiration date once they’re known. Review this document carefully before signing — once executed, it establishes the binding dates for your entire lease term.
If you want guidance on negotiating lease commencement provisions that protect your business and your budget, I’m Matt Bingaman. Contact me today and let’s make sure your lease timeline works for your operational needs.