IT Downtime Calculator
Downtime is easy to shrug off until you cost it. Three numbers is all it takes.
100% means nobody can do anything. Most real outages land between 60% and 90%, because some work carries on offline.
Cost of one outage
For 4 hours of downtime, at £704 an hour.
Every hour you are down
A full working day (8 hours)
A year, if this happens monthly
One outage of this length every month burns 2.1% of your annual payroll on people being unable to work.
IT SUPPORT QUOTE IN 60 SECONDSHow this is worked out
Staff affected, multiplied by hourly wage, multiplied by hours down, scaled by how much work actually stops. The last part matters: a hard outage where nothing works is not the same as a degraded system where people can still get some things done, and treating every incident as 100% overstates the cost. Most real outages land between 60% and 90%.
The annual figure assumes an outage of the length you entered happens once a month. The full-day figure uses an eight-hour day, and the payroll comparison uses 230 working days a year.
This counts lost staff time only. It leaves out lost revenue, orders that go elsewhere, overtime spent catching up, contractual service credits you owe your own customers, and the reputational cost of telling a client you cannot access their file today. Those are real and often larger than the wage figure, but they cannot honestly be estimated from three inputs. The number this tool gives you is the floor, not the ceiling.
Nothing you enter is sent anywhere. Everything is worked out in your browser.
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