A single pastry sold with every third cup of coffee can generate an extra €1,800 monthly profit. Most restaurant owners know upselling works but struggle to measure its real financial impact. Here's how to calculate exactly what each upsell brings to your bottom line.
What is upselling and why is it so valuable?
Upselling means selling additional items to guests who've already ordered something. Think pastry with coffee, an appetizer alongside the main course, or dessert after the meal.
The beauty of upselling: you already have the guest. The hardest step (getting someone into your establishment) is done. Now you just need to increase the average bill.
💡 Example:
You sell 100 cups of coffee per day at €2.50. Without upselling:
- Coffee revenue: €250 per day
- Per month: €7,500
With upselling you manage to get 30% of coffee customers to also buy a pastry at €3.50:
- 30 pastries × €3.50 = €105 extra per day
- Per month: €3,150 extra revenue
Result: 42% more revenue on coffee without a single extra guest
The upselling formulas you need
To measure the impact of upselling, you need three important calculations:
1. Upsell percentage:
Upsell % = (Number of upsells / Total number of main orders) × 100
2. Extra revenue from upselling:
Extra revenue = Number of upsells × Average price of upsell item
3. Margin impact:
Extra profit = (Upsell revenue × Margin % of upsell item) - Extra costs
⚠️ Note:
Always calculate with prices excluding VAT for margin calculations. The price on your menu includes 9% VAT for food.
Practical calculation: pastry with coffee
Let's work through the example with real numbers:
💡 Worked example:
Situation: 100 cups of coffee per day, you want to upsell pastry
- Coffee price: €2.50 (incl. VAT) = €2.29 excl. VAT
- Pastry price: €3.50 (incl. VAT) = €3.21 excl. VAT
- Food cost pastry: €1.20 per piece
- Upsell success rate: 30%
Calculation per day:
- Number of upsells: 100 × 30% = 30 pastries
- Extra revenue: 30 × €3.21 = €96.30
- Margin per pastry: €3.21 - €1.20 = €2.01
- Extra profit: 30 × €2.01 = €60.30 per day
Per month: €1,809 extra profit!
Different types of upselling and their impact
Not all upsells are equal. Here are the most profitable options:
- Desserts: High margin (often 60-70%), low food cost
- Drinks with the meal: Very high margin, especially wine
- Appetizers: Average margin, but increases overall experience
- Coffee after the meal: High margin, low costs
- Upgrade portions: Marginally higher costs, significantly higher price
💡 Comparison example:
Impact of different upsells with 50 guests per day:
- Dessert (30% success): 15 × €2.50 margin = €37.50/day
- Glass of wine (25% success): 12 × €3.20 margin = €38.40/day
- Coffee (60% success): 30 × €1.80 margin = €54.00/day
Coffee wins due to high success rate!
How do you measure your upselling performance?
To know if your upselling strategy works, you need to track:
- Baseline measurement: Average bill before upselling focus
- Upsell percentage: What percentage of your guests take the extra item?
- Average bill after upselling: Has this increased?
- Total extra revenue: How much extra per day/week/month?
- Cost-benefit: What does it net you?
After managing kitchen operations for nearly a decade, I've found that tools like KitchenNmbrs help track these figures automatically by showing your sales data and margins per dish.
Common mistakes in upselling calculations
⚠️ Note:
Many entrepreneurs only count extra revenue and forget the extra costs. An upsell that generates €3 revenue but costs €2.50 only nets €0.50 profit!
Other common mistakes:
- Too optimistic success rates: Start conservatively with 20-30%
- Not accounting for staff: Extra items sometimes mean more work
- Ignoring seasonal fluctuations: Ice cream sells less in winter
- Sacrificing quality: Cheap upsells can damage your reputation
Optimization: which upsells should you promote?
Focus on upsells with the optimal combination of success rate and margin:
💡 Priority matrix:
High priority (promote!):
- High success rate (>40%) + high margin (>€2)
- Example: coffee after the meal, small desserts
Medium priority:
- Average success rate (20-40%) + high margin
- Example: wine pairings, special desserts
Low priority:
- Low success rate (<20%) or low margin (<€1)
- Example: expensive wines, complex appetizers
How do you calculate the impact of upselling? (step by step)
Measure your baseline
Track for 2 weeks what your average bill per guest is without upselling focus. This is your starting point to measure improvement.
Choose your upsell items and calculate the margin
Select 2-3 items with high margin. Calculate per item: selling price excl. VAT minus ingredient costs = margin per piece.
Test and measure the success rate
Have your team actively upsell and track: number of main orders vs. number of upsells. This gives you your success rate.
Calculate the impact
Multiply number of upsells × margin per piece = extra profit per day. Calculate through to week/month to see the total impact.
✨ Pro tip
Track your upsell performance for exactly 30 days before making changes - most owners give up after just one week. Focus on items with €2+ profit margins rather than high-revenue, low-margin options.
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
What's a realistic upsell percentage for a starting business?
Start with 20-30% as your target. Experienced teams with good products can achieve 40-50%, but that requires training and the right items.
Should I include VAT in my upselling calculations?
For margin calculations you always calculate excluding VAT. The price on your menu divided by 1.09 gives you the price excl. 9% VAT.
Which upsells have the highest margin?
Drinks (especially coffee, tea, wine) and desserts often have the highest margin. They cost little to make but have a good selling price.
How do I train my staff to upsell better?
Teach them to know the products, give them a script for natural suggestions, and share the results. Motivation works better than pressure.
What if my upsell percentage is too low?
Check if your items are attractive enough, if your staff is actively doing it, and if the prices aren't too high. Sometimes trying different items helps.
How do I calculate upselling impact during slow versus busy periods?
Track your success rates separately for peak and off-peak hours. Busy periods often have lower upsell rates due to rushed service, while slower times allow more conversation and higher conversion rates.
📚 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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