The Default Clause in a Commercial Lease: What Counts as a Default, What the Landlord Can Do, and How to Protect Yourself
A restaurant missed one rent payment. Not because of bad faith — because of a bank wire that cleared two days late.
The lease said rent was due on the first. The lease also said that if rent was not received by the fifth, the landlord could issue a notice of default. The landlord issued the notice. The lease gave the tenant three days to cure. The tenant cured on day four.
The landlord took the position that the cure was untimely. The tenant argued the cure was effective. The dispute went to mediation, cost both sides time and legal fees, and nearly ended a twelve-year tenancy over a wire transfer delay.
Default clauses are the legal machinery that governs what happens when something goes wrong in a commercial lease. Most tenants never read them carefully — until they’re in one.
This post explains how commercial lease default clauses work, what counts as a default, what landlords can do when default is triggered, and what to negotiate to protect yourself before you ever need it.
If you want to know exactly how the default and remedy provisions in your lease are written, run it through sasir.ai — our AI-powered lease analysis tool. The first scan is free.
What Counts as a Default
Commercial lease defaults typically fall into two categories: monetary and non-monetary.
Monetary default is the most familiar: failure to pay rent or any other lease charge on time. But ‘on time’ is defined by the lease, not by common sense. A payment that arrives one day late is a monetary default. A payment that is sent but received late due to a banking issue is still a monetary default under most lease definitions. The landlord’s obligation is typically to send a notice and wait a cure period — not to accept late payments gracefully.
Non-monetary default is broader and often more dangerous. Non-monetary defaults include: violating the use clause (operating outside your permitted use), unauthorized alterations to the space, failure to maintain required insurance, failing to comply with law, abandoning the premises, and in some leases, a material adverse change in the tenant’s financial condition.
That last one deserves particular attention. Some commercial leases include a ‘financial condition’ default that can be triggered if the tenant’s business deteriorates significantly — even without a missed payment. This is aggressive landlord language that should be removed or heavily limited at negotiation.
Count the default triggers in your lease. Landlord-drafted leases often have eight, ten, or more events that constitute default. Tenants rarely have more than one or two. The asymmetry is the risk.
The Cure Period: Your Single Most Valuable Default Protection
A cure period is the amount of time you have, after receiving a notice of default, to remedy the problem before the landlord can pursue escalating remedies.
Without a cure period, a single missed payment or technical violation can immediately expose you to the landlord’s full arsenal of remedies — including termination. With a proper cure period, you have a defined window to fix the problem and keep the lease intact.
Standard negotiated cure periods:
Monetary defaults: 5 to 10 business days after written notice
Non-monetary defaults: 30 days after written notice, with an additional extension if the cure cannot reasonably be completed within 30 days but the tenant has commenced and is diligently pursuing the cure
The extension for non-monetary defaults is critical. Some non-monetary issues — insurance renewal, construction corrections, regulatory compliance — cannot be resolved in 30 days. A provision that gives the tenant additional time when they’re actively curing protects against default being declared for good-faith efforts that simply take longer than the initial window.
The most important cure period protection: ‘Tenant shall not be in default if Tenant commences cure within the cure period and diligently pursues cure to completion.’ That sentence converts a hard deadline into a standard of reasonable effort.
Rent Acceleration: The Most Financially Devastating Remedy
When a default leads to lease termination, the most financially dangerous landlord remedy is rent acceleration: the right to declare all remaining rent for the entire lease term immediately due and payable.
Acceleration means that if you default in year two of a ten-year lease, the landlord can demand eight years of future rent in a lump sum. In practice, acceleration is often limited by landlord mitigation obligations — the landlord must make reasonable efforts to re-let the space and cannot simply sit on an empty space collecting acceleration damages. But even with mitigation, the acceleration threat creates enormous leverage and financial exposure.
What to negotiate:
Limit or eliminate automatic acceleration — acceleration should be at the landlord’s election, not automatic upon any default
Require the landlord to mitigate damages by re-letting the space before pursuing acceleration amounts
Cap acceleration exposure to a defined period of remaining rent (e.g., twelve months rather than the full remaining term)
Require written notice before acceleration can be invoked, separate from the notice of default
Automatic rent acceleration on any default is one of the most aggressive provisions in a commercial lease. It converts a minor default into catastrophic financial exposure. Push hard to remove ‘automatic’ and replace it with ‘at Landlord’s election following notice and failure to cure.’
Attorney’s Fees: The One-Sided Provision Most Tenants Miss
Most commercial lease default sections include an attorney’s fees provision. In landlord-drafted leases, this is almost always one-sided: if the landlord prevails in any dispute, the tenant pays the landlord’s legal fees.
This asymmetry creates settlement pressure in any dispute, even when the tenant is right. The cost of being wrong isn’t just the outcome — it’s the outcome plus the landlord’s legal fees.
Negotiate this to be reciprocal: the prevailing party in any dispute recovers attorney’s fees from the other side. A mutual fee provision levels the playing field and removes the structural pressure on tenants to settle rather than litigate legitimate disputes.
The Landlord’s Mitigation Obligation
In most jurisdictions, a landlord who terminates a lease for default has a legal obligation to mitigate damages by making commercially reasonable efforts to re-let the space. They cannot simply collect a vacant space and hold the former tenant liable for full remaining rent indefinitely.
The problem: in many commercial leases, this mitigation obligation is either silent or explicitly disclaimed. Some landlord-drafted leases include language stating that the landlord has ‘no obligation to mitigate’ or that re-letting efforts are at the landlord’s sole discretion.
In jurisdictions where mitigation is legally required regardless, this lease language may be unenforceable. But fighting that battle in court costs money. Negotiate the mitigation obligation explicitly into the lease, require the landlord to use ‘commercially reasonable efforts’ to re-let, and credit any re-letting proceeds against your remaining exposure.
What to Negotiate
Cure period for monetary defaults: 5–10 business days after written notice
Cure period for non-monetary defaults: 30 days with extension for diligent cure in progress
Remove automatic rent acceleration — require landlord election + notice before acceleration
Cap acceleration exposure to a defined period rather than full remaining term
Reciprocal attorney’s fees provision
Explicit landlord mitigation obligation with re-letting credit against tenant exposure
Remove or limit ‘financial condition’ default triggers
Limit cross-default provisions — a default under one lease should not automatically trigger default under another
The one-paragraph rewrite that changes everything: ‘Landlord may not exercise any remedy for default until Tenant has received written notice and the applicable cure period has expired. Rent acceleration, if any, requires Landlord’s written election after the cure period has run. Attorney’s fees shall be recoverable by the prevailing party.’
The Bottom Line
Default clauses look like legal machinery that will never apply to you. Until they do. And by then, the language is fixed.
Count your default triggers. Negotiate the cure periods. Limit acceleration. Make the attorney’s fee provision reciprocal. And read the default section with the same attention you give the rent clause.
If you’re navigating a commercial lease, these additional resources may help:
If you want to know exactly how the default and remedy provisions in your lease are written, run it through sasir.ai. The first scan is free.
