CustomPartNet
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August 18, 2026
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Updated August 18, 2026
A new CNC machining center, an injection molding press, or a custom tooling package rarely gets paid for in cash. Most manufacturers finance these purchases over several years, which means the real cost of a piece of equipment isn't just its sticker price. It's the sticker price plus interest, spread out over a payment term, and then divided across however many parts that equipment produces.
That's the exact calculation CustomPartNet's Financing Calculator handles. If you're a supplier weighing a capital purchase, or trying to figure out how much of that monthly payment needs to show up in your part pricing, this widget turns a rough guess into a real number.
Try the Financing Calculator → or Register for a Free Account → to start showing up in buyer searches and putting that new capacity to work.
The widget takes three inputs:
Principal — the amount being financed (equipment cost, tooling cost, or any other large capital expense)
Annual interest rate — the rate charged on the loan or financing agreement
Payment term — how many months you'll be paying it off
From those three numbers, it returns:
Monthly payment — what you'll owe each month for the life of the loan
Total cost after interest — principal plus every dollar of interest paid over the full term
Cost per part — the financing cost spread across your expected production volume
That last output is the one suppliers care about most, because it's the number that actually belongs in a quote. A machine payment by itself doesn't mean much until you know how many parts it needs to produce to pay for itself.
Tooling and equipment financing shows up in supplier pricing all the time, whether it's built into a per-part rate or negotiated as a separate line item with a buyer. Getting it wrong in either direction causes problems. Underestimate it and you're absorbing financing costs out of your margin for years. Overestimate it and your quote loses to a competitor who ran the numbers more carefully.
If you’d like to find out not just your machine cost, but your full hourly cost, check out CustomPartNet's Hourly Rate Calculator. It helps you calculate your fully burdened hourly rate, alongside labor, consumables, and overhead.
Say a machine shop is adding a 5-axis CNC machining center to take on a new long-term production contract. The machine costs $180,000, financed at 6.5% annual interest over 84 months (seven years). The shop expects to dedicate this machine to the new program, producing roughly 3,000 parts per month, which is 252,000 parts over the entire loan period. You can adjust this number if you want to breakeven sooner or later.
Plugging those numbers into the Financing Calculator:
Monthly payment: approximately $2,673
Total cost after interest: approximately $224,532 (about $44,532 in interest over the full term)
Cost per part (financing only): approximately $0.89
That last figure is the one that matters at quoting time. Before labor, materials, or overhead even enter the picture, this shop already knows that roughly 89 cents per part needs to be recovered just to cover the machine payment. If the contract volume drops to 2,000 parts a month instead of 3,000, that financing cost per part climbs to about $1.34, which is exactly the kind of shift a supplier needs to see before committing to a program, not after.
Any large upfront cost you're financing rather than paying outright. That's most commonly equipment, but it can also be a tooling package, a facility buildout, or any other capital expense tied to a specific program.
Most suppliers roll it into their per-part price or hourly rate, the same way they'd account for depreciation, consumables, or labor. Some negotiate it as a separate amortized line item with the buyer instead, particularly for expensive tooling tied to one program.
Run the calculator at a few different volume assumptions. Since cost per part is just the payment divided by units produced, a lower volume raises your break-even cost per part and a higher volume lowers it. Knowing that range before you quote protects your margin if actual volumes come in below projections.
No. It's strictly a loan calculation covering principal, interest, and term. Taxes, insurance, and maintenance costs should be added separately, typically as part of your overhead in a broader rate calculation like the Hourly Rate Calculator.
Indirectly, yes. Understanding how suppliers price in equipment costs helps explain why quotes vary and why a supplier might hold firm on price for a program with lower committed volume. It's also useful for buyers evaluating whether to invest in their own tooling versus paying a supplier's amortized rate.
They're closely related. Tooling amortization typically spreads a tooling cost across an expected number of parts, sometimes without financing charges involved at all. This calculator specifically handles the case where interest is being paid on the amount financed, whether that's tooling, equipment, or both.
If you're financing new capacity, know your real cost per part before you quote your next program. And if you're a supplier looking to fill that capacity with new business, a free CustomPartNet account puts your capabilities in front of buyers actively searching for suppliers like you.
Register for a Free Account → to create a supplier profile and start receiving qualified RFQs, or Get Quotes Now → if you're a buyer looking to compare suppliers for your next project.