--- title: "Corrective vs. preventive maintenance calculator | attendo" description: "Calculate what unplanned breakdowns cost you each year and compare it with a preventive maintenance plan: downtime, repairs and plan cost, with your numbers." url: "https://attendo.me/en/calculators/corrective-vs-preventive-maintenance" lang: "en" --- Calculator · CMMS # The cost of breakdowns vs. preventive maintenance Every unplanned breakdown adds two costs: the repair and the hours the equipment sits idle. Calculate what they cost you a year and how much that changes with a preventive maintenance plan you set yourself. - Runs in your browser - Formulas and assumptions in plain sight - A link to share the result ### Shall we email you this calculation? With your numbers, the result, the assumptions and the link to open it again. ### Shall we go over it with your numbers? Bring us these numbers. We will show you attendo with your case and go over together which part of the result is realistic. Copy the link with your numbers first and paste it into the form message: that way we arrive with the math already done. ## The whole calculation, in plain sight It is an estimate based on your numbers. These are the formulas with the calculator’s numbers: they change with what you enter above. ### The math, step by step Each line shows what we calculate, with which formula and with which numbers. 1. Cost of one breakdown downtime hours × cost per downtime hour + repair `6 × €250 + €900` equals **€2,400** 2. Breakdown cost per year, today breakdowns a year × cost of one breakdown `24 × €2,400` equals **€57,600** 3. Breakdowns left with preventive maintenance breakdowns a year × (1 − breakdowns you avoid) `24 × (1 − 30%)` equals **16.8** 4. Cost of each remaining breakdown downtime hours × (1 − downtime reduction) × cost per hour + repair `6 × (1 − 0%) × €250 + €900` equals **€2,400** 5. Cost of the preventive plan new inspections a year × cost per inspection `48 × €150` equals **€7,200** 6. Cost per year with preventive maintenance remaining breakdowns × their cost + plan cost `16.8 × €2,400 + €7,200` equals **€47,520** 7. Difference per year cost today − cost with preventive maintenance `€57,600 − €47,520` equals **€10,080** 8. Break-even point 1 − (cost today − plan cost) ÷ (breakdowns a year × cost of each remaining breakdown) `1 − (€57,600 − €7,200) ÷ (24 × €2,400)` equals **12.5%** ### Assumptions - Every breakdown costs the same: downtime hours times the hourly cost, plus the repair. It is an average: some cost much more than others. - The preventive plan adds its own cost: inspections a year times the cost of each one. - The breakdowns you avoid disappear. The ones that remain cost the same, unless you enter less downtime. - Only new inspections count. What you already do today is not included on either side. ### What we leave out We leave it out so we do not inflate the result. - Equipment service life and energy consumption. - Overtime to make up for lost production, if you have not added it to the cost of an hour of downtime. - The customer who leaves after a serious breakdown. It matters, but we cannot measure it with four numbers. ### Sample values and why They are not industry averages or figures from a study: they are a starting point so you do not start from a blank page. ## Where the improvement comes from The “with attendo” scenario is not magic: it comes from these features. You set the percentage. ### The plan does not slip attendo generates preventive work orders on your business calendar and flags overdue plans. ### The anomaly before the breakdown When an inspection finds an anomaly, it becomes a planned corrective job. ### The history, in the QR code The technician opens the equipment record before starting: what was done last time and which spare part to bring. ### The cost of each piece of equipment Hours, spare parts and travel add up on each asset. You know which equipment deserves a plan and which does not. [See attendo CMMS](https://attendo.me/en/cmms) ## Run these numbers too Return ### [attendo ROI](https://attendo.me/en/calculators/roi) The hours and money your team gets back when it stops hunting for data, retyping service reports and chasing approvals. Ticketing ### [Cost of missing the SLA](https://attendo.me/en/calculators/sla-breach-cost) What late tickets add up to per month and per year: contract penalties and the hours spent explaining and compensating. Field Service ### [Service reports and paperwork](https://attendo.me/en/calculators/paper-work-orders) The office hours spent retyping service reports and the money waiting to be invoiced in the meantime. [See all calculators](https://attendo.me/en/calculators) ## Frequently asked questions ### Why does preventive maintenance avoid only 30% of breakdowns? It is a cautious starting value, not a figure from a study. Some breakdowns no inspection will catch: random failures, impacts or misuse. Change the percentage to what you see in your own history. ### What goes into the cost of an hour of downtime? Everything you lose while the equipment is not working: production or service not delivered, idle staff, contract penalties and overtime to catch up. If you maintain your customers’ equipment, think mainly about the penalty and the emergency call-out. ### What if preventive maintenance costs me more? It can happen, and the calculator tells you. It happens, for example, when you inspect equipment that is cheap to repair and rarely stops. That is why we show you the percentage of avoided breakdowns at which the plan pays off: use it to decide which equipment gets preventive maintenance. ### Where do I get these numbers? The number of breakdowns and the downtime hours come from last year’s corrective work orders. In attendo CMMS, the reliability report gives you the breakdowns, MTBF and MTTR for each piece of equipment. ### Do you store the data I enter? Not unless you ask us to email you the calculation. The calculation runs in your browser. The values stay in the page address so you can share the result: they only travel with the link if you share it. If you ask for the calculation by email, we keep your email address with the values and the result to send it to you, as the privacy policy explains. ## Put preventive maintenance to the test with your equipment Give us your inventory and your breakdown history. We will show you attendo CMMS with your equipment families and your plans, and look together at where preventive maintenance pays off. - With your operation, not a generic demo - A real person from our team replies - No cold calls afterwards Would you rather talk first? - Phone [+34 910 053 530](tel:+34910053530) - Email [sales@attendo.me](mailto:sales@attendo.me) - Monday to Thursday 9:30 AM to 6:30 PM and Friday 9:30 AM to 2:30 PM (Spain time)