Total cost of ownership (TCO) for construction tools: why the purchase price is only 20%

For a construction procurement manager, comparing two tools by catalogue price is like comparing two vehicles by purchase price alone, ignoring fuel consumption, servicing and resale value. The purchase price of a tool represents only 15 to 20% of what it actually costs over 5 years. The rest is maintenance, consumables, site downtime and early replacement.

What is tool TCO?

TCO (Total Cost of Ownership) is the sum of all costs associated with a tool, from purchase to disposal. In construction, this calculation includes five main cost categories.

1. Purchase price

This is the only figure most buyers compare. On an entry-level brushed motor tool, it is 30 to 50% lower than a brushless equivalent. This difference is real, but it represents only one-fifth of the total cost.

2. Motor maintenance

A brushed motor requires brush replacement every 80 to 150 hours of actual use. The unit cost is low (EUR 10 to 20 per pair) but the frequency is high: with 6 hours of daily use, brushes need changing every 3 to 5 weeks. Add periodic commutator resurfacing (every 3 to 4 sets of brushes) and the risk of brush short-circuit failure.

A brushless motor has no internal wear parts. The only components to monitor are the bearings, whose lifespan is measured in thousands of hours. The motor maintenance budget drops from EUR 300 to 600 per year to under EUR 50.

3. Motor-related consumables

This category does not cover abrasives (identical regardless of motor type) but motor-specific parts. Brushes, commutator springs, brush holders: these items simply do not exist on a brushless motor.

4. Site downtime costs

This is the most underestimated and often the heaviest cost category. When a tool breaks down on site, the consequences far exceed the repair cost.

Direct costs: idle labour (1 to 3 operators for 2 to 4 hours), emergency tool rental, workshop or supplier travel.

Indirect costs: delay to the overall schedule, potential contractual penalties, crew disruption, half-day productivity loss.

An unplanned stoppage costs an average of EUR 180 to 350 per hour depending on site size. A brushed motor generates 2 to 4 unplanned stoppages per quarter. A brushless motor generates 0 to 1 per year.

5. Early replacement

An intensively used brushed tool (more than 4 hours per day) reaches end of life in 18 to 24 months. The brushless equivalent lasts 5 to 8 years. The fleet renewal cost, annualised, is divided by 3 to 4.

6-year TCO simulation: brushless ceiling grinder vs brushed fleet

The model applies Pierre’s 2026 reference : 1 Sept Tools grinder vs an equivalent brushed fleet over 6 years. A brushed cycle lasts 3 months of effective jobsite work spread over roughly 4.5 calendar months, i.e. 16 cycles per brushed machine over the period. Productivity ratios are calibrated on 2023 to 2025 sites.

1 Sept Tools over 6 years

Manufacturer warranty 2 years minimum, technical lifespan 6 years with regular maintenance.

Equivalent brushed fleet by range

Median mid-range saving : EUR 21,600 over 6 years. Edge case : at EUR 200 (bottom of entry range), Sept Tools costs EUR 2,800 more over 6 years. The calculator displays this case without hiding it, but the defensible median remains EUR 400 on entry level.

Why construction buyers still think in purchase price

Three reasons explain the persistence of this bias.

Line-item budgets. Tools are purchased from an equipment budget, maintenance is charged to a workshop budget, site downtime is absorbed into overheads. Nobody consolidates the three lines.

No analytical tracking. Tool failures are rarely tracked with precision. The true cost of stoppages remains invisible in dashboards.

Distorted comparisons. Catalogues display purchase prices, not TCOs. The buyer compares what appears comparable, but is not in reality.

Brushless vs petrol engine comparison

For some site tools (cut-off saws, compactors), the alternative is not the brushed motor but the petrol engine. The petrol TCO is even less favourable.

Fuel: a petrol engine consumes 1.5 to 3 litres per hour. At EUR 2 per litre, that is EUR 3,300 to 6,600 per year for 5 hours of daily use.

Engine maintenance: filters, spark plugs, oil changes, carburettor. Average budget of EUR 600 to 1,200 per year.

Regulatory constraints: a petrol engine in a confined space requires mechanical ventilation whose cost adds to the TCO. In urban areas, noise and exhaust emission restrictions are tightening every year.

Brushless eliminates all three cost categories simultaneously.

How to calculate your own TCO

Sept Tools provides a configurator that lets you size your requirements and estimate TCO over 3, 5 or 7 years based on your usage volume. The calculation uses real lifespan data from our machines and maintenance costs observed across our professional clients.

For a personalised calculation tailored to your existing fleet, contact our sales team. We carry out free TCO audits for fleets of more than 5 machines.

Calculate the real 5-year cost of your fleet

Purchase price says nothing about the real cost of a construction tool. Enter your fleet size, your usage hours and your team hourly cost : the calculator returns the cumulative 5-year gap in seconds.

Open the TCO calculator

Conclusion

The purchase price is a misleading indicator for professional construction tools. The true cost of a tool is measured over its full lifespan, incorporating renewal, maintenance and longevity. Over 6 years of site work, 1 Sept Tools grinder at EUR 12,400 replaces between 22 and 48 brushed grinders depending on the range compared, with a median cumulative saving of EUR 21,600 vs mid range.

TCO is not a theoretical concept: it is the difference between a tool budget that is suffered and one that is controlled.

Sept Tools products

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