What is rent acceleration in a commercial lease?

A rent acceleration clause lets the landlord declare all remaining rent through the end of the term immediately due when the tenant defaults, instead of collecting it month by month. On a five-year lease at $10,000 per month, a default at month 20 can produce an immediate claim of up to $400,000.

Is accelerated rent enforceable?

It varies by jurisdiction and by drafting. Because the landlord may retake and re-let the space, a claim for all future rent raises double-recovery concerns, and clauses drafted with that in mind commonly discount the accelerated stream to present value and credit re-letting proceeds. A lawyer can confirm how a specific clause is treated where the property sits.

What is a present-value discount in an acceleration clause?

Future rent paid today is worth more than rent paid over years, so negotiated acceleration clauses commonly reduce the accelerated total to its present value using a stated discount rate. A clause with no discount claims the raw sum of all future rent, which functions more like a penalty than an estimate of actual loss.

Does a landlord have to re-let the space after accelerating rent?

Whether background law requires mitigation varies by jurisdiction. Negotiated leases commonly avoid the uncertainty by writing a re-letting credit directly into the acceleration clause, so rent recovered from a replacement tenant offsets the accelerated claim regardless of the default rule.

How does rent acceleration affect a personal guaranty?

If the lease is personally guaranteed, an accelerated claim can reach the guarantor as a single lump sum. With limited guaranties — good guy, rolling, or burn-off — whether the accelerated amount sits inside or outside the cap depends on the sequencing and definition language, which is why the two provisions are commonly reviewed together.

Rent Acceleration in a Commercial Lease: One Missed Month, the Whole Term Due

A rent acceleration clauseconverts a missed month into the whole remaining term. On a qualifying default, the landlord may declare all future rent through the end of the lease immediately due — not month by month as it would have come due, but as a single present obligation. On a five-year lease, a stumble in year two stops being a $10,000 problem and becomes a $400,000 one.

This is an observational explainer of how acceleration works in the commercial lease context specifically — how it differs from the loan version, what softens it in negotiated drafts, and how it compounds with guaranties. The general mechanics of acceleration across contract types are covered in our acceleration clause explainer. This is general information, not advice about your lease. The legal judgment about what to do with what you find is yours.

Why lease acceleration is its own animal

When a loan accelerates, the lender calls a fixed amount it already handed over — the unpaid principal. When a lease accelerates, the landlord is claiming rent for months of occupancy that have not happened, on space it may retake and re-let to someone else. That double-recovery possibility — accelerated rent from the old tenant and new rent from a replacement — is why accelerated-rent provisions attract more scrutiny than their loan cousins, and why how much of the accelerated figure holds up varies by jurisdiction and by how the clause is drafted. Drafts written with that scrutiny in mind commonly build in the moderating features below; bare-maximalist drafts commonly do not.

What triggers it

Monetary default — unpaid rent or additional rent, the classic trigger. The cure period (or its absence) decides how fast a late payment becomes a term-wide claim.
Non-monetary default — broader drafts accelerate on any lease breach: an unapproved sublease, a lapsed insurance certificate, an operating-covenant violation.
Cross-default — where the lease is linked to other agreements with the same landlord or to related financing, a default elsewhere can arrive as an accelerated rent bill here. How those linkages widen or narrow is covered in our cross-default explainer.

The math, and what moderates it

Default at month 20 of a 60-month lease at $10,000 per month leaves 40 months on the term:

Clause version	Accelerated claim	What changed
Bare acceleration	$400,000	Full remaining rent, due now
With present-value discount	Below $400,000	Future rent discounted to today's value at a stated rate
With re-letting credit	Shrinks as the space re-lets	New tenant's rent offsets the claim
Both	Landlord's actual shortfall	Claim approximates real damage rather than a windfall

Those two features — discounting the stream to present value and crediting what the landlord recovers by re-letting — are the difference between a clause that estimates the landlord's genuine loss and one that functions as a penalty. Negotiated versions of commercial leases commonly include both, along with a notice-and-cure period ahead of the trigger. Whether a landlord must attempt to re-let at all — mitigation — varies by jurisdiction, which is why negotiated drafts commonly write the re-letting credit into the clause rather than leaving it to background law.

The guaranty multiplier

Acceleration interacts with personal guaranties in a way that deserves its own line item. If the lease is personally guaranteed, an accelerated claim can land on the guarantor all at once — and the timing questions get intricate with limited guaranties. Under a good guy guaranty, whether rent accelerated before surrender sits inside the personal guarantee depends on the sequencing language. Under a rolling or burn-off guaranty, whether the cap applies to the accelerated lump or only to rent as it would have accrued is a drafting question with a six-figure spread. Guaranty-plus-acceleration combinations are commonly reviewed together rather than clause by clause for exactly this reason.

What the clause looks like on the page

The fingerprint is a remedies provision reciting that on default the landlord may declare "all rent for the balance of the term immediately due and payable." The details worth locating nearby: whether "rent" sweeps in additional rent (CAM, taxes, insurance), whether a discount rate is stated and what it is, whether re-letting proceeds are credited, and whether the remedy is exclusive or stacks with others — termination, damages, and drawdown of the security deposit. Leases carrying bare acceleration with no discount, no credit, and no cure period are commonly reviewed by counsel before signature. What you do with that information is your call.