The occupancy cost ratio, also called the health ratio, divides everything a retail tenant pays to occupy its space (base rent plus CAM, taxes, and insurance) by its gross sales. It is the single best early warning sign that a tenant cannot afford its rent. A strong credit tenant paying 15% of sales in a store losing money is still a closure risk.
How to Calculate It
A 2,800 SF quick-service restaurant pays $98,000 in base rent and $22,000 in triple net charges, for $120,000 in total occupancy cost. Its reported annual sales are $1,650,000. The occupancy cost ratio is $120,000 / $1,650,000 = 7.3%, comfortably in the healthy range for the category. If sales fell to $950,000, the same rent would be 12.6%, and the store would be a real closure risk even though nothing about the lease changed.
Why the Ratio Varies by Tenant Type
Tenants with high gross margins can afford a larger share of sales in rent. A jewelry store with 50%+ gross margins can survive a 14% ratio; a grocer earning 2% net margins cannot survive much above 3% to 5%. Restaurants sit in the middle, with occupancy cost competing against food and labor (together called prime cost), which usually consumes 55% to 65% of sales.
Where to Get Tenant Sales
- Sales reporting clauses: Many retail leases, especially ones with percentage rent, require tenants to report sales monthly or annually. Enforce them.
- Offering memorandums: Some net lease OMs disclose store sales or a health ratio. Ask for it if it is missing, and ask why if the seller will not share.
- Location analytics: Foot traffic data (Placer.ai and similar) can estimate relative performance versus other stores in the chain.
- Franchise disclosure documents: A brand's FDD Item 19 often shows average unit volumes, a useful benchmark for a single store.
How to Use It in Your Deals
- Screening acquisitions: A high ratio on a long-term lease means the rent may be above what the location supports. If the tenant leaves, you will re-lease at lower rent.
- Renewals: A low ratio gives you room to push rent at renewal; a high ratio says a modest increase with a longer term may be the smarter trade.
- Watch the trend: A ratio climbing from 8% to 11% over three years is more important than any single year's number.
- Percentage rent: Tenants paying percentage rent above a breakpoint are, by definition, strong performers.
Frequently Asked Questions
Is occupancy cost the same as rent-to-sales?
Close. Rent-to-sales sometimes uses base rent only. Occupancy cost includes CAM, taxes, and insurance, which is more accurate for triple net leases.
What if the tenant will not report sales?
Check the lease for reporting obligations. If none exist, use foot traffic data and brand averages to estimate, and underwrite more conservatively.
Does a low ratio mean I should raise rent?
It means the tenant can likely absorb market rent. Pair it with market rent comps before negotiating.
Bottom Line
Tenant credit tells you who pays if the store fails. Occupancy cost tells you whether it is likely to fail. Ask for sales on every retail deal, calculate the ratio, and treat a high or rising number as a warning even when the brand is strong.
Educational content only, not legal, tax, or investment advice. Figures in examples are illustrative. Confirm specifics with your attorney, CPA, and lender before acting.