Ask a plant manager what an hour of downtime costs and you'll usually get a shrug or a rough guess. Ask a CFO, and the number needs to survive scrutiny. On a modern high-speed FMCG line, that number is typically somewhere between $36,000 and $50,000 per hour, once every cost layer is actually counted instead of just the obvious one. Sign up to start tracking downtime cost automatically, hour by hour.
Why Most Estimates Undercount It
Most informal downtime estimates stop at lost throughput, the units that would have come off the line. That's the visible layer. The real number stacks emergency repair premiums, labor paid to stand idle, and schedule disruption that ripples into the next shift, which is exactly why the honest figure lands in the $36,000-$50,000 per hour range on a high-speed line, not a fraction of it.
The Cost Stack, Layer By Layer
| Cost Component |
What It Includes |
| Lost throughput |
Units not produced, valued at margin contribution, not just raw material cost |
| Emergency repair premium |
Rush parts and overtime labor commonly run 4-5x the cost of the same repair planned in advance |
| Idle labor |
Operators and line staff still on payroll while the line is stopped, producing nothing |
| Schedule disruption |
Downstream reshuffling, delayed changeovers, and rush shipping to recover missed delivery windows |
How The Cost Cascades Past The Stopped Hour
1
The Stopped Hour Itself
Lost output, idle labor, and utilities still running are the direct, easy-to-count costs during the stoppage
2
The Repair Premium
Emergency parts sourcing and overtime maintenance labor typically add four to five times what the same fix would have cost if it were scheduled
3
The Ripple Into The Next Shift
A missed run pushes the next SKU's changeover later, compresses the following shift's schedule, and can put a delivery commitment at risk
4
The Recovery Cost
Expedited shipping or rush production to hit a delivery deadline anyway is often the least visible line item, and one of the most expensive
Turn Every Stoppage Into A Real Dollar Figure
OxMaint logs downtime automatically and applies your actual cost inputs, so every stoppage has a real dollar figure attached instead of a rough guess. Sign up for a free trial to start calculating your true downtime cost, or book a demo to see the full cost breakdown on your own lines.
Building A Number The CFO Will Trust
Baseline
Use Margin, Not Revenue
Value lost units at contribution margin, since revenue alone overstates the loss and undercuts your own credibility
Verify
Pull Real Repair Costs
Compare actual emergency repair invoices against planned repair quotes to confirm your plant's own premium multiplier
Track
Automate The Math
Tie every logged stoppage to a cost calculation automatically, so the investment case updates itself instead of needing a rebuild each quarter
Why This Belongs In A CMMS, Not A Spreadsheet
A spreadsheet cost model goes stale the moment production rates, margins, or repair costs change. A CMMS that logs actual downtime duration and applies live cost inputs turns every stoppage into a current, defensible dollar figure, which is what makes a reliability investment case hold up in front of a CFO instead of getting waved off as a guess.
Frequently Asked Questions
Q
Why does the $36K-$50K range vary so much between plants?
Line speed, product margin, and labor structure all shift the number. A high-margin, high-speed line sits at the top of the range, while a slower or lower-margin line lands closer to the bottom, but both are usually higher than the informal estimate most plants use.
Q
Is the 4-5x emergency repair premium accurate for most plants?
It's a common range once rush freight, overtime rates, and expedited parts sourcing are all included, though the exact multiplier is worth verifying against your own historical repair invoices rather than assumed.
Q
What's the biggest mistake plants make when presenting downtime cost to leadership?
Stopping at lost units and leaving out repair premiums and schedule disruption. That undercounts the real number and makes reliability investments look far less urgent than they actually are.
Know Your Real Number Before The Next Stoppage
OxMaint calculates the true cost of every stoppage automatically, from lost throughput to repair premiums, so your investment case is backed by real data. Sign up for a free trial to start calculating your true downtime cost, or book a demo to see it on your own numbers.
