You're evaluating a new pizza oven that costs €20,000 but promises to boost your monthly profits by €800. How do you know if it's worth it? The payback period calculation gives you the answer, but many restaurant owners get it wrong.
What is payback period?
Payback period shows exactly how long your investment takes to pay for itself through additional profit. It's straightforward math, but the devil's in the details.
💡 Example:
You invest €15,000 in a new oven that saves you €500 per month on energy costs.
Payback period: €15,000 ÷ €500 = 30 months
The payback period formula
Here's the basic formula:
Payback period = Total investment ÷ Extra profit per month
But here's where most people mess up: you must calculate with extra profit, not extra revenue. If your new equipment generates more sales, subtract the extra costs first—ingredients, labor, utilities.
Types of restaurant investments
Different investments create different payback patterns:
- Cost-saving investments: Energy-efficient equipment, automation tools
- Capacity expansion: Additional seating, larger kitchen space, second location
- Quality improvement: Premium equipment for better taste, speed, or presentation
- Efficiency investments: POS systems, time-saving kitchen equipment
Calculating cost-saving investments
These are the simplest because you can directly measure the savings.
💡 Example energy savings:
New energy-efficient fryer costs €8,000. Saves €200/month on electricity.
- Investment: €8,000
- Monthly savings: €200
- Payback period: €8,000 ÷ €200 = 40 months
After 3.3 years you've recovered your investment.
Calculating revenue-generating investments
This gets tricky. You need extra profit, not extra revenue. One of the most common blind spots in kitchen management is forgetting to account for variable costs that come with increased sales.
💡 Example terrace expansion:
Terrace expansion costs €25,000. Generates 20 extra covers per day.
- Extra revenue: 20 × €32 × 25 days = €16,000/month
- Extra food cost (30%): €4,800
- Extra staff: €2,000
- Extra profit: €16,000 - €4,800 - €2,000 = €9,200
Payback period: €25,000 ÷ €9,200 = 2.7 months
⚠️ Watch out:
Always use realistic numbers. Those 20 extra covers per day only work if you actually have that demand.
What is a good payback period?
This depends on your investment type and financial situation:
- Excellent: Under 12 months
- Good: 12-24 months
- Acceptable: 24-36 months
- Questionable: Over 36 months
Most restaurants see payback periods of 18-30 months for major investments. And that's perfectly normal.
Factors that affect your payback period
Several variables can throw off your calculations:
- Seasonal fluctuations: Calculate with average months, not your best months
- Maintenance and repairs: Subtract annual maintenance costs from your savings
- Depreciation: Equipment loses value over time
- Financing costs: If you're borrowing, subtract interest from your profit
💡 Example with financing:
Investment of €20,000 with 5% interest over 5 years.
- Monthly payment + interest: €377
- Extra profit from investment: €800/month
- Net extra profit: €800 - €377 = €423
Actual payback period: €20,000 ÷ €423 = 47 months
Including risks in your calculation
Not every investment performs as expected. Build in a safety margin:
- Calculate with 80% of your expected extra revenue
- Add 10-15% to your investment amount for unexpected costs
- Account for a ramp-up period of 2-3 months
Tools like KitchenNmbrs help you track actual results, so you can see if your investment performs as planned.
How do you calculate payback period? (step by step)
Determine your total investment
Add up all costs: purchase price, installation, any renovations, staff training. Don't forget VAT if you can't reclaim it.
Calculate your monthly extra profit
For cost-saving investments, this is the monthly savings. For revenue-generating investments: extra revenue minus extra costs (food cost, staff).
Divide investment by monthly profit
Use the formula: Total investment ÷ Extra profit per month = Number of months payback period. Build in a safety margin of 20-30%.
✨ Pro tip
Calculate your payback period using 75% of projected benefits instead of 100%—this 18-month buffer accounts for inevitable delays and lower-than-expected performance. Most restaurant investments that look good at 75% capacity will exceed expectations once fully operational.
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 VAT in my payback calculation?
Include VAT only if you can't fully reclaim it. Most restaurant investments qualify for VAT reclaim, so calculate with amounts excluding VAT.
What if my investment both saves costs and increases revenue?
Add both benefits together. For example: €300 energy savings + €500 extra profit from revenue = €800 total monthly benefit for your payback calculation.
Is a payback period of 4 years too long?
For restaurants, usually yes. Equipment breaks down, trends shift, competition intensifies. Aim for maximum 3 years, preferably shorter.
How do I calculate payback for equipment that improves food quality?
Estimate the revenue impact of better quality—higher prices, more repeat customers, positive reviews driving new business. Then subtract any extra ingredient or labor costs to get your net monthly benefit.
Should seasonal restaurants calculate payback differently?
Absolutely. Calculate based on your actual operating months, not 12 months. A 24-month payback for a year-round restaurant equals 12 months for a seasonal operation that's open 6 months annually.
How do I track whether my investment actually pays back?
Monitor your numbers monthly. Compare actual savings or extra revenue against your projections. Adjust your approach if reality doesn't match your calculations.
Should I include maintenance in the calculation?
Yes, subtract annual maintenance costs from your monthly benefit. For kitchen equipment, typically calculate 3-5% of the purchase price per year for maintenance and repairs.
📚 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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