Why this matters
The advertised rent is not the cost of the space. NNN charges, utilities, insurance, and maintenance stack on top, and rent is the hardest cost to cut once signed. Businesses rarely fail because rent was slightly high; they fail because total occupancy quietly ate the margin.
What "done" looks like
- One total monthly number: base rent + NNN/CAM + utilities + insurance + maintenance
- That total expressed as a percentage of conservative projected revenue
- A written ceiling you will not cross, set before touring
- Stress-tested: the plan survives revenue well under forecast
How to do it
- Ask for the full cost stack on any space: base rent, NNN or CAM charges, tax and insurance pass-throughs, and who pays which utilities and repairs.
- Benchmark against revenue — a widely used restaurant and retail guideline keeps total occupancy under 6–10% of gross sales.
- Use conservative revenue — your low-case projection, not your pitch-deck number.
- Model the escalations — most leases include annual increases; budget year three's rent, not year one's.
Common mistakes
- Budgeting base rent only and discovering the NNN charges after signing
- Benchmarking occupancy against optimistic revenue projections
- Ignoring annual escalation clauses that compound over a five-year term
Real-world examples
- The 6–10% occupancy-to-sales guideline is a long-standing benchmark in restaurant consulting; operators above 10% are flagged as at risk because restaurant net margins average only a few percent.
- Triple-net (NNN) leases — tenant pays property taxes, insurance, and maintenance on top of rent — are standard in US retail leasing, which is why quoted rents understate true cost.
From a founder's point of view
Rent is the one major cost that doesn't flex with revenue — payroll and inventory scale down in a bad month; the lease doesn't. Setting the occupancy ceiling before seeing spaces is how the number stays a business decision instead of a negotiation casualty.
Rule of thumb
Total occupancy — not just rent — under about 10% of realistic gross sales. If the math only works with best-case revenue, it doesn't work.