The calculations are based on the registration covering 3 trademark classes (government fee 1050 EUR) and having been filed on Reggster (attorney fee 395 EUR). So the total cost of the trademark is 1445 EUR.
Since the EU trademark is valid for ten years and covers (currently) 28 countries, here's what the cost looks like
So the monthly cost of maintaining EU trademark rights (attorney fee included), is about 12 EUR. Considering that trademark protection reduced business risks and increases the company's value, it does not seem like a big investment.
How does trademark cost compare to other goods and services?
Daily EU trademark cost: 0,40 EUR
Daily cup of coffee: 2,50 EUR
Weekly EU trademark cost: 2,77 EUR
Weekly BigMac meal: 6,95 EUR
Monthly EU trademark cost: 12,04 EUR
Monthly DropBox Advanced: 12 EUR
In comparison to other costs, having a solid trademark protection is not particularly expensive. Here a final chart comparing trademark costs to coffee and BigMac meals.