Profitability calculator

for glass roof terraces in restaurants & hotels

Step 1 – Current scenario (before enclosing the terrace)

Describe how your terrace currently works: how many tables you have, how many days per month and months per year it is in use, the average number of customers per table, the daily shifts and the average net profit per customer after costs.

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Net profit = revenue per customer – costs (product, staff, etc.).
Current annual net profit

Step 2 – Scenario after enclosing the terrace

Now imagine your terrace already covered with a glass roof and adjust the numbers according to your forecast: total number of tables after the refurbishment, opening days and months, average number of customers per table, daily shifts and average net profit per customer.

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Net profit = revenue per customer – costs (product, staff, etc.).
Annual net profit after the refurbishment

Extra annual net profit thanks to enclosing the terrace

The extra annual net profit thanks to enclosing the terrace is the difference between what your terrace earns now and what it would earn after the refurbishment (with the terrace already enclosed), without taking the initial investment into account yet.

It gives you, at a glance, how much your terrace’s profit would grow per year just by having more tables available, more opening days and better services. In the next step we subtract the investment to see how much you actually keep.

Extra annual net profit thanks to enclosing the terrace

Step 3 – Enter the investment and review the results

Enter the estimated investment to enclose the terrace and the number of years over which you want to amortise it. The calculator will show you the annual amortisation and the extra annual net profit you could obtain during the amortisation period.

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👉 If you don’t yet have an approximate quote, get in touch with our sales team and we’ll help you calculate it.

Estimated years to recover the investment

Estimated years to recover the investment: show you roughly how long it will take for your enclosed terrace to generate extra net profit equal to the cost of the refurbishment. For example, with an investment of €100,000 and extra annual net profit of €50,000, you would recover your investment in about 2 years.


Estimated annual ROI (%)

Estimated annual ROI (%): shows the approximate return on your investment each year. It indicates what percentage of the investment you recover annually as extra net profit thanks to enclosing the terrace. For example, if the investment is €100,000 and the extra annual net profit is €50,000, the estimated annual ROI will be 50%. In other words, each year you are recovering, on average, 50% of the amount invested.


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Annual amortisation of the investment

Annual amortisation of the investment: this is the portion of the refurbishment that you “spread” over each year. It is calculated by dividing the total investment by the number of years you have chosen to amortise it, and it lets you see what annual amount should be covered by the extra profit from the terrace for the investment to be considered paid off.


Additional annual net profit during the amortisation period €