The efficiency of your terrace versus indoor seating determines where you make the most profit per square meter. Most hospitality owners can't pinpoint which area of their business actually generates better returns. This knowledge gap leads to poor investment choices and missed opportunities for maximizing your space.
What is efficiency in hospitality?
Efficiency measures how much profit you generate per square meter. Your terrace might seat fewer guests than indoors, but if the revenue per m² exceeds your interior space, it's actually your money-maker.
💡 Example:
Restaurant with 100m² indoors and 50m² terrace:
- Indoors: €8,000 revenue/month = €80 per m²
- Terrace: €6,000 revenue/month = €120 per m²
The terrace outperforms indoors by 50%!
Gather the right figures
You need precise data from both areas for an accurate comparison. Guesswork won't cut it here — measure and count everything exactly.
- Square footage: Measure both spaces in square meters
- Number of seats: Count chairs, not tables
- Revenue per area: Split your POS data (if possible)
- Operating costs: Heating, lighting, maintenance per space
⚠️ Note:
Most POS systems can't automatically separate terrace from indoor sales. You'll need to track this manually for a week to get reliable data.
Calculate revenue per square meter
This basic formula reveals your efficiency. Monthly figures give you the clearest picture of performance.
Formula: Revenue per m² = Monthly revenue per area / Square footage in m²
💡 Example calculation:
Bistro in May 2024:
- Indoors: €15,000 revenue on 80m² = €187.50 per m²
- Terrace: €12,000 revenue on 40m² = €300 per m²
The terrace generates 60% more revenue per m²
Factor in costs per area
Revenue alone doesn't reveal the full story. Your terrace has different cost structures than indoors: no heating bills, but you're replacing weather-damaged furniture and cleaning after storms.
- Indoor costs: Heating, air conditioning, lighting, interior maintenance
- Terrace costs: Parasols, furniture replacement, cleaning after rain
- Shared costs: Staff, kitchen, general costs split proportionally
Calculate profit per square meter
Now you can determine true efficiency: profit per m². This metric shows you exactly where your business makes real money. One of the most common blind spots in kitchen management is assuming higher revenue automatically means higher profit.
Formula: Profit per m² = (Revenue - Costs) per area / Square footage in m²
💡 Complete calculation:
Same bistro, including costs:
- Indoors: €15,000 revenue - €11,000 costs = €4,000 profit
- Profit per m²: €4,000 / 80m² = €50 per m²
- Terrace: €12,000 revenue - €8,000 costs = €4,000 profit
- Profit per m²: €4,000 / 40m² = €100 per m²
The terrace delivers double the profit per m²!
Factor in seasonal variations
Don't just analyze peak summer months. Your terrace likely sits empty during winter, which dramatically impacts annual efficiency averages.
- Summer months: April-September for terrace efficiency
- Winter months: October-March for indoor efficiency
- Annual average: Include all 12 months for accurate comparison
⚠️ Note:
A terrace earning €200/m² for 6 months and €0 for 6 months averages €100/m² annually. Calculate this properly for realistic projections.
Make practical decisions
Armed with these figures, you can make smarter investment choices about layout, expansion, and marketing focus.
- More efficient terrace: Invest in heating, covered areas to extend the season
- More efficient indoors: Only expand to terrace if the numbers justify it
- Equal efficiency: Focus on expanding total capacity
Tools for continuous monitoring
Measuring once isn't sufficient. Efficiency shifts with seasons, weather patterns, and market trends. Track these metrics monthly.
A food cost calculator can help track dish-level costs, but for space efficiency you'll need your POS data and a simple spreadsheet. Consistency in tracking matters more than which specific tool you choose.
How do you calculate terrace vs indoor efficiency? (step by step)
Measure square footage and count seats
Measure both spaces exactly in square meters with a tape measure. Count the number of chairs (not tables) in each space. Also note how many months per year each area is operational.
Split revenue per area for one month
Manually track which orders come from the terrace and which from indoors. If your POS system doesn't do this automatically, have your staff track each order for a week.
Distribute costs fairly across both areas
Assign direct costs (heating indoors, parasols terrace) directly. Split indirect costs (staff, kitchen) proportionally between both areas based on revenue or square footage.
Calculate profit per square meter for both
Subtract costs from revenue per area to get profit. Divide this profit by the number of square meters. The area with the highest profit per m² is the most efficient.
✨ Pro tip
Track your terrace efficiency over a full 12-month cycle before making major investments — that €250/m² summer performance drops to €125/m² annually if you're closed half the year.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
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Frequently asked questions
Should I include my kitchen in the indoor seating calculation?
No, only count guest seating areas. Your kitchen serves both spaces and shouldn't factor into efficiency calculations. Focus exclusively on dining and seating zones.
How do I handle a terrace that's only open 6 months a year?
Calculate both seasonal efficiency during open months and annual average efficiency. For investment decisions, use the annual average. For day-to-day operations, seasonal efficiency guides your choices.
What if my POS system can't split between terrace and indoors?
Track manually for one week, noting whether each order comes from indoors or terrace. Extrapolate this data to monthly figures. This method provides sufficient accuracy for meaningful calculations.
What efficiency per m² should I expect for my restaurant?
This varies wildly by location and concept. Typical restaurants see €100-200 profit per m² monthly. Focus on comparing your indoor versus terrace performance rather than benchmarking against other businesses.
📚 Sources consulted
- EU Verordening 852/2004 — Levensmiddelenhygiëne (2004) — Official source
- EU Verordening 853/2004 — Hygiënevoorschriften voor levensmiddelen van dierlijke oorsprong (2004) — Official source
- EU Verordening 1169/2011 — Voedselinformatie aan consumenten (2011) — Official source
- NVWA — Hygiënecode voor de horeca (2024) — Official source
- NVWA — Allergenen in voedsel (2024) — Official source
- Codex Alimentarius — International Food Standards (2024) — Official source
- FSA — Safer food, better business (HACCP) (2024) — Official source
- BVL — Lebensmittelhygiene (HACCP) (2024) — Official source
- Warenwetbesluit Bereiding en behandeling van levensmiddelen (2024) — Official source
- WHO — Foodborne diseases estimates (2024) — Official source
Food Standards Agency (FSA) — https://www.food.gov.uk
The HACCP standards shown in this application are for informational purposes only. KitchenNmbrs does not guarantee that displayed values are current or complete. Always consult the FSA or your local authority for the latest regulations.
Written by
Jeffrey Smit
Founder & CEO of KitchenNmbrs
Jeffrey Smit built KitchenNmbrs from 8 years of hands-on experience as kitchen manager at 1NUL8 Group in Rotterdam. His mission: give every restaurant owner control over food cost.
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