Contingent rent is the portion of a commercial lease payment that varies with a future event instead of being fixed at signing. The variable amount usually depends on the tenant’s sales, a published index like the Consumer Price Index, or how heavily the tenant uses the property. This structure keeps fixed costs lower for the tenant during slow periods and gives the landlord a share of the upside when business is strong. It also carries accounting consequences that most tenants underestimate, because U.S. lease rules treat different kinds of contingent rent very differently on the balance sheet.
The Three Common Structures
Every commercial lease starts with base rent, a fixed amount owed regardless of performance. Contingent rent sits on top of that base and only kicks in when a specific trigger occurs. The trigger and the formula are both defined in the lease itself.
Three structures dominate:
- Percentage rent, where the tenant pays a percentage of gross sales (or sales above a set threshold) on top of base rent. This is the most common form, especially in retail.
- Index-based rent, where the base rent adjusts periodically according to a published economic index, most often the Consumer Price Index for All Urban Consumers (CPI-U) published by the Bureau of Labor Statistics.
- Usage-based rent, where the variable component ties to physical use of the asset, measured by things like machine hours, units produced, or vehicle throughput.
The categories aren’t just structural. Under current accounting rules, payments tied to an index or rate follow completely different balance-sheet treatment than payments tied to sales or physical usage.
How Percentage Rent Is Calculated
Percentage rent is the arrangement most people picture. A clothing retailer in a shopping center might pay $150,000 a year in base rent plus 5% of gross sales above a set threshold. That threshold is the breakpoint, and it’s the single most important number in the calculation.
Natural and Negotiated Breakpoints
The natural breakpoint is the sales level at which the percentage formula would produce exactly the base rent amount. Divide annual base rent by the agreed percentage rate. With $150,000 in base rent and a 5% rate, the natural breakpoint is $3,000,000 in gross sales ($150,000 ÷ 0.05). No percentage rent is owed until sales cross that line.
The parties can also negotiate an artificial breakpoint, set higher or lower than the natural one. A higher artificial breakpoint delays the point at which percentage rent begins, which helps the tenant. A lower one triggers percentage rent sooner, which helps the landlord, though base rent is usually reduced to compensate.
Applying the Formula
Once sales cross the breakpoint, the math is simple: (gross sales minus the breakpoint) multiplied by the percentage rate. Sales of $4,000,000 against a $3,000,000 breakpoint at 5% produce $50,000 in contingent rent ($1,000,000 × 0.05). Retail percentage rates typically run from 5% to 15%, with restaurants and specialty retailers often at the higher end.
What Counts as Gross Sales
The lease’s definition of “gross sales” directly controls how much percentage rent is owed. Most leases carve out returned merchandise, employee discounts, sales tax collected and remitted, and gift card purchases (redemptions still count). Whether online sales fulfilled from the store count has become one of the most heavily negotiated points in modern retail leasing. Tenants argue to exclude e-commerce revenue; landlords argue the physical store drives those sales.
How Index and Usage Rent Adjust
Index-Based Adjustments
Index-based rent ties the payment to a published economic indicator, most often the CPI-U. The lease specifies the index, the geographic area (national or a specific metro), and the measurement period. A common clause resets the base rent annually by the percentage change in the national CPI-U over the prior 12 months.
If the base rent is $200,000 and CPI rises 3.5% over the measurement period, the new rent is $207,000 ($200,000 × 1.035). That figure becomes the starting point for the next year’s adjustment, so the effect compounds. This structure is common in ground leases running 50 years or longer, where fixed rent would lose most of its purchasing power.
Many index-based leases include a floor, a ceiling, or both. A floor guarantees the landlord some increase even if deflation occurs. A ceiling caps the annual adjustment, protecting the tenant during high-inflation years. A lease might specify that rent adjusts by the CPI change but never less than 1% and never more than 4% in a single year.
Usage-Based Adjustments
Usage-based rent appears most often in industrial and infrastructure leases. A tenant operating heavy machinery might pay base rent plus a per-hour charge once monthly equipment usage exceeds a set threshold. A toll road operator might pay a variable amount tied to vehicle count. The logic mirrors percentage rent: the payment scales with the economic benefit the tenant extracts from the asset, only the measuring stick is physical activity rather than revenue.
Reporting, Reconciliation, and Audit Rights
Base rent is typically due monthly in advance. Contingent rent follows a different cycle. Many percentage-rent leases require estimated monthly payments based on projected sales, with a formal true-up at the end of each quarter or fiscal year. The true-up compares estimated payments against actual sales and settles any difference, usually within 30 to 90 days after the tenant’s fiscal year closes.
For the true-up to work, the landlord needs reliable sales data. Leases almost always require the tenant to submit certified sales reports, and landlords typically negotiate audit rights on top. A standard audit clause lets the landlord inspect the tenant’s books and records of gross sales. If an audit reveals an understatement above a specified threshold, commonly 3%, the tenant pays the shortfall plus interest and reimburses the landlord’s audit costs. That reimbursement clause gives tenants a strong incentive to report accurately.
Related Clauses Tied to Sales Performance
Contingent rent interacts with other lease provisions, and ignoring them causes surprises on both sides.
Kick-Out Clauses
A kick-out clause lets one or both parties terminate the lease early if sales don’t reach a specified threshold within a set period. A weak location hurts both sides: the tenant loses money on rent it can’t support, and the landlord collects little or no percentage rent from an underperforming space. Kick-outs typically require two to three years to pass before the termination right activates, and the right is usually a one-time election within a narrow window. A departing tenant may need to reimburse the landlord for unamortized build-out costs and brokerage commissions.
Co-Tenancy Clauses
In retail centers, a smaller tenant’s sales often depend on foot traffic driven by anchor stores. A co-tenancy clause protects the smaller tenant if key anchors close or aren’t replaced within a set timeframe, usually 12 to 18 months. When a co-tenancy provision triggers, the rent obligation often drops to a percentage-of-sales-only basis, eliminating fixed base rent until the anchor vacancy is filled. Some clauses go further and grant outright termination if the vacancy persists past the cure period.
Accounting Treatment Under ASC 842
The current U.S. lease accounting standard, ASC Topic 842, draws a sharp line between two categories of variable lease payments. Mixing them up is one of the most common errors in implementation, and it directly affects both the balance sheet and the income statement.
Performance-Based and Usage-Based Payments
Variable payments tied to future performance or usage, such as percentage rent based on sales or charges based on machine hours, are excluded from the lease liability and the right-of-use (ROU) asset entirely. The standard is explicit: lease payments “do not include variable lease payments other than those [that depend on an index or a rate].”1Financial Accounting Standards Board. Leases (Topic 842) – ASC 842-10-30-6 These payments are recognized as expense (for the tenant) or revenue (for the landlord) in the period the triggering event occurs. Percentage rent hits the income statement only when sales cross the breakpoint.
This exclusion applies even when the tenant is virtually certain to owe some variable amount. Probability-based estimates aren’t allowed for performance- or usage-linked payments. The one exception is an “in-substance fixed payment,” which is structured as variable but functionally unavoidable. If the variability has no real economic substance, the payment is treated as fixed and included in the liability.2Financial Accounting Standards Board. Leases (Topic 842) – ASC 842-10-30-5
Index-Based and Rate-Based Payments
Variable payments tied to an index or rate, like CPI-linked escalations, receive different treatment. They are included in the initial measurement of the lease liability and the ROU asset, calculated using the index or rate in effect at the commencement date.3Financial Accounting Standards Board. Leases (Topic 842) – ASC 842-10-30-5(b) No future increases are assumed. The lessee uses the current index value and projects it forward across the entire lease term.
When the index later changes and the actual rent resets, the difference between the assumed payment and the new payment is recognized as expense in the period incurred. A standalone index change does not trigger a full remeasurement of the liability and ROU asset. The liability is only remeasured for index-based adjustments when another remeasurement event happens at the same time, such as a modification to the lease term or a change in the assessment of a purchase option.
Why the Distinction Matters
Two tenants with identical total rent obligations can show very different balance sheets depending on how the variable component is structured. A tenant paying CPI-linked rent carries a larger lease liability and ROU asset than a tenant paying the same total through percentage rent, because the index-based portion sits on the balance sheet while the percentage-based portion flows straight to the income statement. Analysts comparing tenants need to look past balance-sheet figures and read the variable lease payment disclosures.
IFRS 16 Differences
Companies reporting under International Financial Reporting Standards follow IFRS 16 rather than ASC 842, and the two diverge on one key point. Under IFRS 16, when the CPI or other index changes and resets contractual cash flows, the lessee must remeasure the lease liability and ROU asset at that time. ASC 842 does not require this standalone remeasurement. For multinationals reporting under both frameworks, the same index-linked lease produces two parallel accounting models with different liability balances and different expense timing.
Both standards agree on performance- and usage-based variable payments: they are excluded from the lease liability and expensed as incurred, regardless of framework.
Disclosure Requirements
ASC 842 requires both tenants and landlords to disclose specific information about variable lease payments in financial statement footnotes. Tenants must disclose the basis and terms on which variable payments are determined, along with the total variable lease cost recognized during each reporting period.4Financial Accounting Standards Board. Leases (Topic 842) – ASC 842-20-50-3 and 842-20-50-4 That disclosure captures both payments that were never in the lease liability (like percentage rent) and the incremental difference between the assumed index value and the actual amount paid on index-linked rent.
Landlords face parallel disclosure obligations for variable revenue. Because performance-based contingent rent never appears on the balance sheet, these footnote disclosures are the only place investors can see how much of a company’s total occupancy cost is genuinely variable. For a retail tenant, the gap between the lease liability on the balance sheet and the true total cost of occupancy can be substantial, and the disclosures are where that gap becomes visible.