Some spending is bought once (equipment and projects) and some is paid every month: support, licences, security and communications. Mixing the two is the source of most overruns.
The typical case is support paid by the hour, only when something breaks. The annual figure becomes impossible to predict, and the habit sets in of putting off the call while the problem “sort of works”. A managed services contract with a fixed monthly fee and a written SLA changes the incentive: the company knows in January how much it will pay, and the partner earns by preventing, not repairing.
The formats are compared side by side in IT Unlimited versus retainer, hour bundles and outsourcing, and market prices in the cost of IT support for businesses. At DataRoad, IT Unlimited plans start from €395 (Essential), €750 (Premium) and €1,200 (Premium 365) per month + VAT.