Justifying a New CNC Machine Purchase
Buying a new CNC machine is easy to justify on a shop floor and hard to justify on a balance sheet unless the numbers are laid out plainly. This calculator takes the added revenue or labor savings a machine is expected to generate, nets out its added operating costs, and turns that into a payback period and return on investment that can sit in front of a bank or a business partner.
Payback Period vs ROI
Payback period answers "how long until this machine has paid for itself," which is the number most owners care about first. ROI expresses the same cash flow as a percentage return, which is more useful for comparing a machine purchase against other ways the same capital could be spent. A short payback with a strong life-of-machine ROI is the combination most buyers are looking for.
What's Not Included
This is a simple cash-flow model: it does not discount future cash flows to present value, does not account for financing interest if the machine is leased or loaned, and ignores tax effects like depreciation deductions, all of which can meaningfully shift the real-world numbers. Treat it as a first-pass sanity check, not a substitute for an accountant's analysis on a large purchase.