Calculating the hourly rate for machine time – how much each hour of operation costs in a carpentry shop
A customer asks: Cut 40 running meters of laminated wood to size, trim the edges, and cut to width. You have your hourly labor rate in mind. But what does it cost per hour for your sliding table saw to run? If you don’t know that number, you’re giving it away with every quote—or losing money on it.
Standard formulas and example calculations aren’t much help: they can vary significantly from one business to another because purchase prices, service life, and depreciation periods differ so much. The only number that’s right for your shop is the one you calculate yourself. This article walks you through the entire calculation—including the formula, all cost components, and a fully worked-out example.
Hourly machine rate and hourly billing rate—two different figures
The machine hourly rate indicates the cost of one hour of operation for a specific machine—just the machine, without the person operating it. Wages, administrative costs, vehicles, and profit are all included in the hourly billing rate you charge your customers. These two figures go hand in hand: In the cost estimate for a job, machine time is listed at its own rate alongside labor time. Anyone who assumes that machine costs are simply “included in the hourly rate” is effectively subsidizing machine-intensive jobs with labor-intensive ones.
The Formula and Its Six Building Blocks
The calculation is a simple division: all the costs incurred by a machine in a year, divided by the number of hours it actually runs during that year. The annual costs consist of six components.
Depreciation by the book spreads the machine’s loss in value over its useful life. The calculation is based on the replacement cost, not the original purchase price—because eventually the machine will need to be replaced, and that will cost whatever the price is tomorrow. For the useful life, you should use the number of years the machine is realistically expected to operate for you.
Imputed interest is calculated on the capital tied up in the machine that cannot be put to work in a bank account. The standard formula is: half the machine’s value multiplied by the interest rate—half the value because the capital tied up in the machine decreases over the years due to depreciation.
Space costs are the portion of your workshop rent or building expenses that corresponds to the area occupied by the machine. Be honest when calculating: For a sliding table saw , this includes the operator area and the clearance needed for long workpieces and panels—not just the footprint.
Energy costs are determined by the connected load, actual utilization, and the price of electricity. A motor only draws its rated power when under load—averaged over the runtime, consumption is significantly lower. And don't forget the exhaust system: Its motor runs in parallel and should be included proportionally in the same calculation.
Maintenance covers servicing, replacement parts, and repairs. The best way to estimate this is to look at your own invoices from the past few years; if you don’t have those, start with an annual flat rate and adjust it as needed.
Tool costs are a separate expense category in woodworking: buying saw blades, having them sharpened, and eventually replacing them. When a saw is used frequently, these costs add up to more than many people realize.
Operating Hours: The Factor That Determines Everything
The most common mistake lies beneath the surface. Your working hours are not the same as the machine’s operating time: Out of a full year of work, a single machine often accounts for only a few hundred hours of actual operating time—the rest is spent on setup, measuring, assembly, finishing, and customer meetings. A rough estimate would be advisable here, not a precise calculation: Depending on the mix of orders, the same saw might be the heart of production at one shop and used only for cutting to size at another. For this very reason, the Bavarian Carpenters’ Trade Association warns against adopting example figures from other sources: They can vary by a factor of five from one shop to the next. That’s why there’s no substitute for doing your own calculations.
And watch out for the 2,000-hour trap: Industrial calculators tend to assume a full single shift—250 days times 8 hours. That’s the facility’s capacity, not your saw’s operating time. If you base your calculations on that, you’ll cut your rate on paper by a quarter and lose money on every job. One of the few published measurements on this topic comes from the trade journal BM: CNC machines in the skilled trades run for an average of about two hours a day.
If you have an operating-hour counter, read it. If you don’t, keep a tally for each machine over the course of a week and multiply that by 45 workweeks. An honestly low number is inconvenient, but accurate—an inflated operating time lowers the hourly rate and turns the quote into a money-losing deal.
Calculation Example sliding table saw
All figures are estimates to make the calculation easier to understand—substitute your own numbers wherever needed. Assumptions: Replacement cost €22,000, useful life 10 years, interest rate 4 percent, 20 m² of space at €8 per square meter per month, connected load 5.5 kW at 40 percent capacity utilization, electricity price €0.27 per kilowatt-hour, 500 operating hours per year. To put the two location factors into perspective: Rural workshop rents tend to range from 3 to 6 € per square meter, while urban rents are higher; for electricity, small commercial businesses will pay around 27 cents per kilowatt-hour in 2026, and larger customers will pay starting at about 17.
| Cost Component | Invoice | In the year |
|---|---|---|
| Imputed Depreciation | €22,000 over 10 years | 2.200 € |
| Imputed Interest | 11,000 € × 4% | 440 € |
| Space Costs | 20 m² × 8 € × 12 months | 1.920 € |
| Energy | 5.5 kW × 40% × 500 h × 0.27 € | 297 € |
| Maintenance | Annual Flat Rate | 500 € |
| Saw Blades and Sharpening | Annual Flat Rate | 400 € |
| Total | – | 5.757 € |
5,757 € divided by 500 operating hours equals 11.51 € per operating hour. This figure goes into the calculation: One hour of sawing costs the company 11.51 € for the machine, plus the labor cost for the person operating it.
And now for the key point: Of the €5,757, only electricity and saw blades depend on operating hours. Depreciation, interest, rent, and annual maintenance remain the same whether the saw is running or not. Using the same assumptions but with only 250 operating hours, the rate rises to about 21.60 €—almost double. Utilization is the most powerful factor you have in controlling costs.
The Four Most Costly Calculation Errors
- The operator's wage goes into the machine set. People and machines are two separate items—if you mix them up, you'll calculate both incorrectly.
- The term is being sugarcoated. 2,000 hours sounds like a lot of work, but it only makes the premium seem small on paper—the policy still covers the costs.
- The miscellaneous expenses are missing. Insurance, compressed air, exhaust systems, lubricants: small individually, but together they add up to a significant annual amount.
- Calculations are based on the original purchase price. For replacement purchases, the price that will apply tomorrow—the replacement value—is what counts.
Why You Need the Machine Hourly Rate
- Calculating quotes: Machine time multiplied by the machine rate is included in the preliminary cost estimate in addition to labor time—machine-intensive jobs are priced accurately rather than cross-subsidized.
- Decide whether to make it yourself or buy it: Only once you have your own set can you compare whether the purchased CNC part is really more expensive than an hour of your own time at the machine.
- Evaluate your investment: Before buying, make a realistic estimate of the expected operating hours and calculate the future rate—then let the numbers guide your decision, not the sales brochure.
Sometimes the result is inconvenient: A machine that runs 80 hours a year is barely cost-effective based on the hourly rate. In that case, buying from a third party, renting, or purchasing a used machine is the more realistic option—that, too, is a conclusion of this calculation.
From a Single Workstation to a Fleet of Machines
In a larger operation, it’s not the calculation that changes, but the division of labor. Each machine gets its own set of figures—starting with those that tie up a lot of capital or run a lot: sliding table saw, wide-belt sander, CNC. The operating hours come from the workshop, from the operating-hour counter, or from the foreman’s tally sheet; the calculations and record-keeping are handled in the cost accounting department. Once a year, the rate sheets are reviewed; immediately after every major purchase, they are reviewed. In this way, a sample calculation becomes a tool that the entire company uses.
Costing and Taxes: Two Separate Invoices
The imputed depreciation mentioned above has nothing to do with your tax return. For tax purposes, what counts are acquisition costs and the official useful life—and this is where it gets curious: The industry table for woodworking dates back to 1995 and does not list “ sliding table saw ” or “CNC machining centers” as separate categories; edging saws and multi-blade circular saws are listed there with a useful life of 6 to 8 years. In practice, tax advisors typically apply a 5-year useful life for sliding table saw . In accounting terms, however, the replacement cost is calculated over the actual useful life, which is significantly longer for well-maintained machines. Both calculations serve a purpose: one reduces the tax burden, while the other ensures that the funds for a replacement machine will be available in the end.
From a tax perspective, there is currently a favorable window of opportunity: For purchases made between July 2025 and the end of 2027, declining-balance depreciation of up to 30 percent of the residual value applies again. Businesses with profits of up to €200,000 can also use the investment deduction to bring forward up to 50 percent of the planned purchase and take advantage of a 40 percent special depreciation—both in accordance with Section 7g of the German Income Tax Act (EStG). Check with your tax advisor to see if and how this applies to your business. Our “Investment Instead of Purchase” tool can calculate in about a minute what a machine actually costs your business after input tax and depreciation—annually, monthly, or per workday.
The machine hourly rate is half of your cost calculation. The other half is your hourly labor rate—which includes wages, productive hours, overhead, and profit. The hourly rate calculator can figure this out for you in about two minutes, with no registration required—and shows you how far your current rate is from that target.
