Cost of Downtime Calculator
When your systems go down, the meter keeps running — idle staff, missed sales and stalled work. This free calculator turns unplanned IT downtime into a real dollar figure for your business, so you can weigh it against the cost of doing it properly. Everything runs in your browser; nothing is sent until you choose to.
Cost per hour of downtime
$0
Estimated annual downtime cost
$0
A single day’s outage could cost your business a lot more than you think.
Cost per outage
$0
Downtime hours / year
0
Lost productivity / year
$0
Lost revenue / year
$0
Estimates only, based on the figures you entered — a planning guide, not a quote.
Use — Guide
How to use this tool
- Enter the number of employees who can't work productively during an outage — use the slider or type directly. Focus on the people whose work depends on your IT systems.
- Set the average fully-loaded hourly cost per employee (wages plus super and overheads). If you're unsure, divide a typical annual salary by 1,600 as a starting estimate.
- Adjust the productivity loss percentage — how much output stops during an outage. The default of 50% suits a partial outage; use 100% if systems go completely down.
- Optionally enter revenue earned per hour if systems going down also stops income directly (leave at $0 if downtime only affects internal productivity).
- Set the number of unplanned outages you'd expect per year and the average hours each lasts. The results update live as you adjust the sliders.
- Read the estimated annual downtime cost and cost-per-outage figures in the results panel, then compare them against the cost of managed IT and proactive backups.
FAQ — Questions
Frequently asked questions
01How does the downtime cost model work?
The calculator multiplies the number of affected employees by their fully-loaded hourly cost and the productivity loss percentage, then adds any direct revenue lost per hour. That gives a cost per hour of downtime. Multiplied by your estimated outages per year and average outage length, it produces an annual figure. The model captures productivity loss and direct revenue impact — it does not attempt to quantify reputational damage, recovery labour costs or regulatory penalties, which are real but harder to estimate without specific context.
02What does "fully-loaded cost" mean and how do I estimate it?
Fully-loaded cost is what an employee costs the business per hour, including wages, superannuation, and a share of overheads such as office space and software licences. A quick rule of thumb: divide an annual salary by 1,600 (roughly 200 working days at 8 hours). For a $70,000 salary that's around $44 per hour — add 20–30% for on-costs if you want a more conservative figure.
03Is this estimate accurate enough to use in a business case?
The figure is indicative — it is designed to give you a defensible order-of-magnitude number for a business case or board paper, not a precise audit. Real downtime costs vary depending on the nature of the outage, your industry, recovery capability and how quickly staff can work around the problem. Use it as a planning guide and a conversation starter, not a guaranteed figure.
04How can Peritus help reduce our downtime exposure?
Most unplanned IT downtime is preventable. Our Newcastle managed IT team uses proactive monitoring to catch failing hardware, capacity issues and patch gaps before they cause outages, and we pair that with tested cloud backup and fast recovery so that when something does go wrong, you are back online in minutes rather than days. Send your downtime figures through and we'll show you exactly what a managed arrangement would look like for your business.
More — Keep exploring
Related free tools
Want hands-on help, not just a check? Explore ourManaged IT & Support service.
Stop paying for downtime
Protect against this — talk to Peritus about managed IT & backup.
Most of this cost is avoidable. Our Newcastle team keeps businesses running with proactive monitoring, fast response, and tested backups that get you back online in minutes, not days. Send your numbers through and we’ll show you how to cut them.
Prefer to talk? Call 02 4081 9500.
