Accounting & Fractional CFO for CNC and Precision Machine Shops

What makes machine-shop accounting different

Machine-hour rates drive everything. Most shops quote from a blended shop rate set years ago. A 5-axis machining center, a Swiss-type lathe and a manual mill do not cost the same to run, and a single rate quietly overprices simple work and underprices complex work. A machine-hour or burden rate built from depreciation or lease cost, floor space, power, maintenance, programming time and realistic utilization is the foundation of profitable quoting.

Utilization is the hidden variable. A rate calculated at 85% utilization fails when the machine actually runs 55% of available hours. We track capacity utilization by machine group so rates and capital decisions reflect what the floor really does.

Setup and programming time get lost. Short-run, high-mix work lives or dies on setup. If setup and CAM programming aren't captured by job, the jobs that look most profitable are often the ones losing money.

Tooling, inserts and outside processing. Cutting tools, fixtures, gauges and outsourced heat treat, plating, anodizing or grinding need to land on the right job, not in a general supplies account.

Work in process on long jobs. Aerospace, defense, medical and energy work often runs for weeks across multiple operations. Without proper WIP valuation, the income statement swings with the production schedule instead of reflecting real performance.

Capital-intensive growth. New equipment is usually financed. Debt service, Section 179 and bonus depreciation decisions, and the cash timing of deposits and installation all need to be planned before the purchase order, not discovered afterward.

Key numbers we track for machine shops

Metric	Why it matters
Quoted vs. actual hours by job	Shows where estimates are consistently wrong
Machine-hour rate by machine group	Prices work on what each machine actually costs to run
Spindle utilization	Reveals real capacity and whether new equipment is justified
Gross margin by customer and part family	Identifies work to grow, reprice or walk away from
Scrap rate and rework cost	Quantifies quality cost in dollars, not just parts
Quote-to-order rate	Tells you whether you're priced too high or too low
Cash conversion cycle	Measures how long cash is tied up in material, WIP and receivables

More on each service: bookkeeping for manufacturers, outsourced controller, pricing and margin analysis, capital planning, cash flow management and fractional CFO for manufacturers.

A related case study

A fabrication and machining shop was quoting from a labor rate that no longer reflected its costs. After rebuilding the rate from real hours and overhead and costing jobs against quotes, Harrow Fabrication quoted with confidence and grew into new markets. Read the full case study.

Frequently Asked Questions

How should a CNC shop calculate its machine-hour rate?

Add up the annual cost of owning and running each machine group — depreciation or lease payments, floor space, power, maintenance, tooling allowance and a share of indirect labor and overhead — then divide by the hours the machines realistically run, not the hours available. Rates should be reviewed at least annually and whenever utilization changes materially.

Should setup time be quoted separately?

Usually, yes. Quoting setup and programming as a separate line makes small-batch pricing transparent and stops short runs from being subsidized by long ones. Even if you show a single price to the customer, cost setup separately internally.

How do we account for work in process on long machining jobs?

Accumulate material, labor and applied overhead on each open job and carry it on the balance sheet as work in process until the job ships and revenue is recognized. A monthly WIP schedule reviewed against job status keeps margins from swinging with the production calendar.

When does buying a new machine make financial sense?

When the work it enables or the capacity it frees produces more contribution margin than its total cost of ownership, and your cash flow can support the payments with room to spare. We model utilization, financing, tax depreciation and cash timing before you commit.

Do you work with our existing ERP or job-shop software?

Yes. We work with QuickBooks and common job-shop and ERP systems, and connect production data to the general ledger so job costs, WIP and margins reconcile to the financial statements.