Commercial Lease Commencement-Date Checklist: Avoid Billing Delays

Commercial Lease Commencement-Date Checklist: Avoid Billing Delays

A signed commercial lease does not always mean rent should be billed the next day. The signed document may have separate dates for delivery of possession, lease commencement, rent commencement, free rent, tenant build-out, and the first additional-rent payment. It may also require insurance evidence, landlord work, permits, lender consent, or another condition before one of those clocks begins.

That is where avoidable billing delays start. The property team believes the deal is live. Accounting sees an incomplete setup. The tenant asks why an invoice arrived before it could use the space—or why a promised concession was missed.

Use this checklist to create one documented answer to four practical questions: What happened? Which lease provision controls? Who confirmed it? What needs to be billed next? This is operational education, not legal, tax, or accounting advice. The executed lease, its amendments, and applicable requirements control. Ask qualified counsel or advisers to interpret unclear provisions.

First, Separate the Dates That Sound Similar

Before anyone keys a recurring charge into the rent roll, pull the executed lease and every amendment, exhibit, letter agreement, and commencement certificate. Then identify each date separately rather than treating “commencement” as one event.

Depending on the lease, the file may include:

• Lease execution date: when the parties signed.
• Possession or delivery date: when the tenant is entitled to enter or receive the premises.
• Lease commencement date: when the lease term starts.
• Rent commencement date: when base rent becomes due.
• Free-rent period: a stated period when base rent, and sometimes other charges, are not due.
• Additional-rent start date: when CAM, taxes, insurance, utilities, or other pass-through billing begins.
• Expiration date: often calculated from a term that begins on a defined commencement date.

Those dates can be the same, but do not assume they are. A tenant can receive early access for planning or construction before the lease term begins. A tenant can take possession while free rent is still running. In an NNN lease, additional rent may follow a different billing schedule than base rent.

For a broader guide to the provisions worth extracting before a billing decision, see Commercial Lease Abstract Checklist for Landlords.

The Commercial Lease Commencement-Date Checklist

1. Build a single source of truth from the executed file

Start with the final, signed version—not a proposal, draft lease, or email summary. Put the original lease, all amendments, exhibits, work letters, guaranties, and any side agreements in the same review folder.

Create a short commencement record that lists the relevant section numbers, defined terms, dates, notice requirements, and the person responsible for each open item. If an amendment changes the term, rent schedule, or delivery condition, make that amendment part of the working abstract immediately.

The goal is simple: property management, leasing, accounting, and ownership should be looking at the same lease facts. A billing setup built from an outdated abstract is difficult to unwind once the first invoice goes out.

2. Confirm what triggers possession and what proves it happened

Read the delivery and possession language closely. The lease may refer to delivery “as is,” substantial completion of landlord work, completion of a punch list, utility availability, required approvals, or a written notice from the landlord. It may also define what the tenant can do before formal possession, such as inspect, measure, install equipment, or begin tenant work.

Record the factual evidence for the event that occurred: a delivery notice, keys or access-control record, a joint walk-through, a signed acceptance, photographs, or a written punch-list status. Keep the evidence with the commencement record rather than relying on a memory of when the suite “was basically ready.”

If landlord work remains incomplete, do not decide on your own whether the work is minor enough to start the term. Compare the actual condition to the lease language and escalate any material question to the appropriate decision-maker or counsel.

3. Clear the conditions that belong before the start date

Commercial leases often place operational conditions around commencement. Make a written list of every condition that must be completed, waived, or documented before the relevant date can be confirmed.

Common examples include:

• landlord work, tenant improvements, or a required inspection;
• a signed guaranty, security deposit, letter of credit, or other security;
• evidence of insurance and required endorsements;
• permits, licenses, or utility arrangements tied to the tenant’s use;
• lender, franchisor, government, or third-party approvals when the lease calls for them; and
• a formal commencement certificate or similar acknowledgment.

Assign an owner and a due date to each item. Mark the item as complete only when the supporting document or confirmation is in the file. If the lease gives one party a right to waive a condition, capture the written waiver and confirm that the person giving it has the authority required by the lease.

4. Review insurance before the tenant starts operating

Insurance should not be a last-minute request after move-in. Compare the tenant’s certificate and endorsements with the specific lease requirements: named insured, additional-insured wording where required, limits, policy dates, notice requirements, and any special coverage tied to the tenant’s use.

Treat the lease—not a generic certificate checklist—as the source for the requirements. If the document does not match, document the exception and route it for review before treating the condition as complete. The operational tracking process is easier when each requirement, document, expiration date, and follow-up owner is visible in one place. See How to Track Certificates of Insurance for NNN Commercial Leases for a practical file-management workflow.

5. Calculate the lease and rent dates from the correct trigger

Once the factual trigger is confirmed, apply the lease’s actual timing rule. Some leases use a fixed calendar date. Others use a number of days after delivery, substantial completion, permit issuance, tenant opening, or another defined event. The term may start on one date while base rent begins later.

Write the calculation into the commencement record:

1. State the trigger event and the date it occurred. 2. Quote or cite the lease section used for the calculation. 3. Apply any stated day-counting convention, adjustment, or extension. 4. Identify the resulting lease commencement, rent commencement, free-rent end, and expiration dates. 5. Have the appropriate internal reviewer confirm the result before it reaches the tenant ledger.

Do not quietly replace a lease formula with the date that is most convenient for the monthly billing cycle. If an operational billing date differs from the contractual due date, preserve the contractual date and document how the billing system will handle the timing.

6. Translate concessions into a billing schedule

Free rent, rent abatements, delayed rent commencement, and tenant-improvement periods are easy to misapply because they can affect different charges differently. The lease may excuse base rent while leaving utilities, taxes, insurance, CAM, or other additional rent payable. It may also require a repayment or other consequence if the tenant defaults during a stated period.

Set up a line-by-line schedule rather than a single “free rent” flag. Show the charge type, contractual start date, concession period, first invoice date, due date, and any proration method that the lease requires. Before releasing the first bill, have the property manager and accounting team compare the schedule to the rent clause and any amendment.

For more on keeping lease commencement and concessions distinct, read Free Rent and Rent Commencement in NNN Lease Negotiations.

7. Set up the tenant, suite, and charge codes before invoicing

The first invoice exposes setup errors fast. Confirm the legal tenant name, billing contact, notice address, suite identifier, rentable-area data, tax treatment, payment instructions, and any guarantor or property-specific references your process needs.

Then map each recurring and one-time charge to its lease source. For NNN or modified-gross leases, verify the tenant’s share, billing frequency, estimate amount, caps or exclusions, and whether any charge begins later than base rent. A clean rent roll should show what the tenant owes now, what starts later, and why.

If the first month is partial, preserve the lease basis for the proration. Do not assume every charge uses the same denominator or day count. When the calculation is uncertain, pause the unsupported line item and get a review instead of sending a bill that the team cannot explain.

8. Send the first invoice with a useful audit trail

Before the invoice is sent, run a short two-person review: one person reads the lease and commencement record; the other reads the tenant setup and invoice. Confirm the rent start date, concession treatment, additional-rent schedule, partial-month calculations, and payment instructions.

Save the final invoice, the versioned billing schedule, and the support used to approve it. If the tenant asks a question, your team should be able to identify the lease section and calculation without rebuilding the deal from email threads.

This same discipline helps prevent missed recurring charges later. Commercial Tenant Billing: How Landlords Catch Missed Lease Charges explains how to keep lease terms connected to the billing record after move-in.

A 15-Minute Pre-Billing Review

Before marking a new lease “active,” ask these questions:

• Do we have the fully executed lease, all amendments, and the current abstract?
• Which date controls possession, the lease term, base rent, free rent, additional rent, and expiration?
• What document proves the triggering event occurred?
• Are all stated conditions complete, waived in writing, or flagged for review?
• Does the insurance file match the lease requirements or show an approved exception?
• Has the free-rent or abatement schedule been applied by charge type?
• Does the tenant setup match the lease entity, suite, and billing details?
• Can accounting explain the first invoice from the lease and commencement record alone?

Make Commencement a Repeatable Handoff

The goal is not to make a simple move-in bureaucratic. It is to stop a signed lease from becoming four different versions of the truth across leasing, property management, accounting, and the tenant.

Use one commencement record, one evidence folder, and one approved billing schedule. When the lease conditions, possession evidence, rent dates, and first invoice are linked, your team can start the relationship with fewer avoidable corrections—and with a better record if questions arise later.

See how PigJet helps commercial landlords keep lease details and tenant billing organized.