Only 12% of restaurant customers will return after a negative experience, but 92% trust referrals from people they know. Net Promoter Score (NPS) captures both sides of this equation - measuring guest satisfaction and their willingness to recommend you. This metric directly impacts your bottom line since promoters return more frequently and bring new customers.
What is Net Promoter Score?
Net Promoter Score gives you a number between -100 and +100 that shows guest loyalty. Everything hinges on one question: "How likely are you to recommend this restaurant to friends or family?"
Guests rate you from 0 to 10. You then sort them into three categories:
- Promoters (9-10): Your biggest fans who actively recommend you
- Passives (7-8): Content but won't go out of their way to promote
- Detractors (0-6): Disappointed guests who'll warn others away
How do you calculate NPS?
The math is straightforward:
NPS = % Promoters - % Detractors
💡 Example:
You collect 100 ratings:
- 60 guests score 9-10 (Promoters)
- 25 guests score 7-8 (Passives)
- 15 guests score 0-6 (Detractors)
NPS = 60% - 15% = +45
What does your NPS score mean?
Restaurant NPS typically falls between -20 and +70. Here's how to interpret yours:
- +70 or higher: Outstanding (you're in the top 1%)
- +50 to +70: Excellent performance
- +30 to +50: Solid results
- 0 to +30: Room for improvement
- Below 0: Crisis mode - more guests discourage than recommend
⚠️ Note:
An NPS of +20 doesn't mean 20% satisfaction. It means 20% more guests promote than detract. You might have 50% promoters and 30% detractors - that's still +20.
How do you collect NPS data?
Several methods work well for restaurants:
- Table QR codes: Guests scan and respond while the experience is fresh
- Receipt surveys: Include a short URL for quick feedback
- Follow-up emails: Works if you capture contact info
- Direct asking: At payment (though this skews positive)
💡 Practical tip:
Target 30+ responses monthly for meaningful data. Frame it as "30-second feedback" rather than "survey." A small incentive like free dessert next visit boosts response rates significantly.
Using NPS to increase revenue
NPS becomes powerful when you act on the data:
Maximize Promoters (9-10)
- Request Google and Yelp reviews
- Launch referral programs with incentives
- Celebrate feedback with your team
- Feature testimonials in marketing
Convert Detractors (0-6)
- Reach out within 24 hours
- Acknowledge issues and offer solutions
- Provide a complimentary return visit
- Address systemic problems they've identified
💡 Example action plan:
Restaurant at NPS +25 targeting +40:
- Analyze top 3 detractor complaints
- Retrain staff on problem areas
- Track progress monthly
- Target: Reduce detractors by 5% = +5 NPS boost
Linking NPS to financial results
Higher NPS directly correlates with revenue growth. From years of working in professional kitchens, I've seen how promoters behave differently:
- Promoters visit 2-3x more frequently
- They spend 15-25% more per visit
- Each promoter refers 2+ new guests annually
- Detractors never return and warn 5+ others away
💡 Calculation example:
Restaurant serving 1,000 guests monthly, €35 average ticket:
- Boosting NPS from +20 to +40 = 10% more promoters
- 100 new promoters × 2 extra visits × €35 = €7,000 annually
- Plus: 200 referred guests = €7,000 more
Total impact: €14,000 additional yearly revenue
Connecting NPS with menu performance
Smart operators link NPS scores to specific operational data:
- Which dishes do promoters order most? Double down on promoting these
- What times/days generate higher scores? Study what's different about these shifts
- Which items correlate with detractor feedback? Review recipes and food costs
Tools like KitchenNmbrs help identify your most profitable dishes. Combining profitability data with NPS reveals which items make guests happy AND boost margins.
How do you implement NPS in your restaurant? (step by step)
Set up the NPS question
Create a simple survey with the core question: 'How likely are you to recommend us?' (0-10 scale). Add one open question: 'Why did you give this score?' Keep it short - maximum 2 questions.
Choose your measurement method
Place QR codes on tables or print a short URL on receipts. Include a clear call-to-action: '30 seconds of feedback = free coffee next time'. Avoid asking verbally - that produces socially desirable answers.
Analyze and act
Calculate your NPS monthly (% promoters - % detractors). Contact detractors within 24 hours. Ask promoters for Google reviews. Identify patterns: which days/dishes score highest?
✨ Pro tip
Track your NPS scores by 2-hour time blocks throughout the week. You'll discover patterns like lower scores during 7-9pm Friday rushes when kitchen timing suffers, giving you specific windows to focus improvement efforts.
Calculate this yourself?
In the KitchenNmbrs app you can do this in just a few clicks. 7 days free, no credit card.
Was this article helpful?
Frequently asked questions
How often should I measure NPS?
Collect feedback continuously but analyze trends monthly. You need at least 30 responses per month for reliable insights. Smaller operations with under 100 monthly guests can review quarterly instead.
What's considered a good NPS score for restaurants?
Restaurant NPS between +30 and +50 indicates solid performance. Scores above +50 are excellent. Anything below zero signals serious problems - more guests are warning others away than recommending you.
Should I worry about passives who score 7-8?
Passives don't affect your NPS calculation but represent missed opportunities. They're satisfied but not excited enough to recommend you. Ask what would've made their experience a 9 or 10 - often it's simple fixes.
How do I increase my NPS response rate?
Offer small incentives like 10% off next visit or free appetizer. Use QR codes for convenience and ask at the right moment - after they've finished eating, not while they're hungry. Keep surveys under 2 minutes.
Can I compare my NPS with competitors?
Focus primarily on your own month-to-month trends rather than competitor comparisons. Survey methods and timing vary widely between restaurants, making direct comparisons unreliable. Track whether you're improving over time.
What's the best time to ask for NPS feedback?
Right after the meal while the experience is fresh, but before they're rushing to leave. Avoid peak busy periods when staff can't properly explain the survey. Weekend lunch often works better than Friday dinner rush.
How quickly should I respond to detractor feedback?
Contact detractors within 24 hours, ideally the same day. Quick response shows you care and often prevents negative online reviews. Even if you can't fix their specific issue, acknowledging it promptly demonstrates commitment to improvement.
📚 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.
All your financial KPIs in one dashboard
Food cost percentage, gross margin, revenue per cover — KitchenNmbrs calculates it all automatically based on your recipes and purchases. Start your free trial.
Start free trial →