When a franchise operator negotiates a new NNN lease, the focus is typically on year-one economics: base rent, estimated CAM, and pro-forma revenue. Year one looks workable. What's less visible is how the different components of occupancy cost escalate at different rates and compound on each other over a 5- or 10-year term.
This article walks through a concrete 5-year occupancy cost model for a hypothetical NNN franchise location to show exactly how a manageable year-one cost evolves by year five.
The Starting Point: Year One Occupancy Cost
Location profile:
- Franchise concept: QSR, end-cap unit
- Leased square footage: 2,000 sq ft
- Gross revenue (year 1): $1,100,000
- Lease commencement: January 1, Year 1
- Lease term: 5 years with renewal options
Year 1 occupancy cost components:
| Component | Year 1 Amount | Notes |
|---|---|---|
| Base rent | $42,000 | $21.00/sq ft/year |
| CAM estimate | $8,400 | $4.20/sq ft/year |
| Property taxes | $5,200 | Based on current assessment |
| Insurance | $2,400 | Based on current premium |
| Total occupancy cost | $58,000 | 5.3% OCR on $1.1M revenue |
Year 1 OCR of 5.3% looks excellent. Well within the 8–11% QSR benchmark. The operator accepts the lease.
Year 2: First Escalation Step and CAM Drift
Base rent: The lease includes 3% annual escalation steps.
Year 2 base rent = $42,000 × 1.03 = $43,260
CAM: No lease cap on CAM in this example (a common situation in leases from that era). CAM increases by 6% driven by labor cost increases for maintenance contractors and a landscaping contract renewal.
Year 2 CAM = $8,400 × 1.06 = $8,904
Property taxes: No reassessment event. Property tax rate increased by 2% system-wide.
Year 2 taxes = $5,200 × 1.02 = $5,304
Insurance: Premium increased 8% due to carrier market conditions.
Year 2 insurance = $2,400 × 1.08 = $2,592
Year 2 total: $60,060. Occupancy cost increased $2,060 (3.6%). Revenue grew 5% to $1,155,000. OCR: 5.2%. Still fine.
Year 3: The Management Fee Change
In year 3, the property changed ownership. The new ownership group switched property management companies. The new manager applies the management fee as 5% of total CAM including taxes and insurance, whereas the prior manager applied it to controllable expenses only. The fee hasn't changed percentage-wise, but the base is larger.
Old fee structure: 5% × $8,400 controllable expenses = $760/year (tenant's share of the pool management fee, approximately)
New fee structure: 5% × ($8,400 + $5,200 + $2,400) = 5% × $16,000 = $800/year (tenant's share)
This discrepancy ($380/year per location) is a management fee overcharge if the lease specifies that the management fee is calculated against controllable expenses. It's a common error that occurs when a new manager sets up the fee calculation without reviewing the lease terms.
Base rent: $43,260 × 1.03 = $44,558
CAM: $8,904 × 1.08 = $9,616 (another 8% increase — contractor costs continue rising)
Property taxes: $5,304 × 1.02 = $5,410
Insurance: $2,592 × 1.10 = $2,851 (10% increase — carrier re-priced the portfolio)
Year 3 total: $62,435. Revenue: $1,200,000. OCR: 5.2%. The individual components are drifting, but revenue growth is keeping pace.
Year 4: The Reassessment Event
In year 4, the property is sold to a new investor group. In this state, a sale triggers reassessment at the transaction price. The property sold for $4.2M. The prior assessed value was $2.8M. The assessment ratio in this county is 80%.
New assessed value = $4.2M × 80% = $3.36M
Prior assessed value = $2.8M × 80% = $2.24M
Increase in assessed value = $1.12M
At a property tax rate of 2.1% (combined county and city levy):
Prior annual tax = $2.24M × 2.1% = $47,040
New annual tax = $3.36M × 2.1% = $70,560
Tax increase = $23,520 for the whole property
With a 4% pro-rata share:
Your tax increase = $23,520 × 4% = $940.80/year
Year 4 total occupancy cost:
| Component | Amount |
|---|---|
| Base rent ($44,558 × 1.03) | $45,895 |
| CAM ($9,616 × 1.07) | $10,289 |
| Property taxes ($5,410 + $940) | $6,350 |
| Insurance ($2,851 × 1.09) | $3,108 |
| Total | $65,642 |
Revenue: $1,245,000. OCR: 5.3%. Still within benchmark, but the reassessment added $940/year permanently.
Year 5: Stacking Effect Becomes Visible
In year 5, there's no single large event — just the accumulated compounding of all prior increases, plus a moderate CAM increase driven by a parking lot sealcoat project and a new exterior lighting maintenance contract.
Year 5 occupancy cost:
| Component | Amount | Notes |
|---|---|---|
| Base rent ($45,895 × 1.03) | $47,272 | 5th escalation step |
| CAM ($10,289 × 1.09) | $11,215 | New maintenance contracts |
| Property taxes ($6,350 × 1.025) | $6,509 | Normal assessment cycle |
| Insurance ($3,108 × 1.07) | $3,326 | Continued market increases |
| Total | $68,322 |
Year 1 total was $58,000. Year 5 total is $68,322. That's an 18% increase in occupancy cost over five years.
If revenue grew at 5% annually:
- Year 1 revenue: $1,100,000
- Year 5 revenue: $1,100,000 × (1.05)^4 = $1,337,000
- Year 5 OCR: $68,322 / $1,337,000 = 5.1%
Revenue growth absorbed the occupancy cost increase, so OCR is roughly stable. This is the scenario where occupancy cost escalation doesn't create a crisis — revenue growth offsets it.
But consider the same scenario with 2% annual revenue growth:
- Year 5 revenue: $1,100,000 × (1.02)^4 = $1,490,000
- Year 5 OCR: $68,322 / $1,490,000 = 5.7%
Still workable, but the OCR has risen. Now add the management fee overcharge that's been running since year 3 (approximately $380/year undercharged to you), and the cumulative effect becomes visible.
The Compounding Verification Opportunity
Each year of the 5-year model above had at least one cost component worth verifying against the lease:
- Year 3: Management fee base change — was it within lease terms?
- Year 4: Tax reassessment amount — was the calculation correct and was only the eligible parcel's taxes included?
- Year 5: New maintenance contracts — were any capital improvements bundled in?
Checking each annual reconciliation as it arrives — rather than treating it as an invoice to pay — is what keeps the 5-year cost model accurate instead of inflated.
Use CAMAudit to verify the current year's reconciliation against your lease terms.
Frequently Asked Questions
Should I model occupancy cost before signing a 5-year lease?
Yes. Build a 5-year projection using reasonable escalation assumptions for each component: 3–5% for controllable CAM, 2–3% for base rent escalation, 3–5% for taxes, and 5–10% for insurance depending on the market. Include a reassessment scenario for year 3 assuming the property could sell. The model doesn't need to be precise to be useful — it shows you whether the year-5 OCR is still acceptable under a range of scenarios.
What's a realistic CAM escalation assumption?
CAM escalation depends on what's driving costs at your specific property type and location. Labor costs for maintenance contractors, landscaping, and cleaning have been a primary driver. Insurance has been a significant driver in recent years, particularly in hurricane and wildfire-exposed markets. A range of 5–8% for controllable CAM and 3–5% for taxes is a reasonable planning assumption, understanding that actual results may vary significantly.
How does a CAM cap affect the 5-year model?
A CAM cap that limits annual controllable expense increases to 5% caps the worst-case scenario for that component. If controllable expenses would have grown 8% annually without the cap, the cap saves approximately 3% per year in controllable CAM — compounding significantly over 5 years. When negotiating a new lease, quantify the value of the cap in the 5-year model.
What happens if the property is reassessed at renewal instead of during the term?
If the property hasn't sold during your lease term, reassessment risk at renewal depends on local assessment practices. If renewal triggers a reassessment (unusual), or if the property is sold near your renewal date, the tax basis resets. Budget for this possibility in your renewal economics.
Does this model apply to ground leases or build-to-suit locations?
Ground leases and build-to-suit NNN leases may have different cost structures — the landlord's expense pool may be smaller (for ground leases where the tenant owns the building) or larger (for build-to-suit with all-inclusive NNN terms). The model structure is the same; the specific cost inputs will differ based on the lease structure.
Is there value in auditing every year, or just when the OCR spikes?
There's value in reviewing every reconciliation, even in years when OCR is stable. Errors that are caught in year 1 don't compound into years 2–5. An error in the denominator, for example, generates an overcharge every year it goes uncorrected. The audit cost is low relative to the cumulative overcharge over a lease term.