3D Printing Business ROI Calculator

Calculate monthly profit, payback period, and ROI for a 3D printing side business from printer cost, per-print economics, and sales volume.

Inputs

Methodology

Cost per successful print = (material + electricity + depreciation + labor) ÷ (1 − failure rate), plus platform fees, payment processing, and shipping/packaging on each sold print. Depreciation = (printer cost − residual value) ÷ useful-life hours × print time. Monthly operating profit = (selling price − cost per successful print) × units sold, minus fixed monthly costs. Payback and ROI use cash flow — depreciation is added back, since the printer's cost is already counted once as the initial investment — which avoids counting the printer price twice. ROI = (cumulative cash profit over the period − initial investment) ÷ initial investment × 100.

How to use this for a purchase or scaling decision

Enter your printer's actual cost and useful life, your typical print's material and time, and what you actually charge and sell per month. The dominant result — 24-month ROI — is the clearest single number for judging whether the investment is worthwhile; the payback period tells you when the printer's cost stops being at risk. Compare the result to your next-best use of the same cash before deciding to buy, or before adding a second printer.

Limitations of this model

Frequently asked questions

Why does the payback period add depreciation back instead of just using monthly profit?

Depreciation spreads the printer's purchase price across its useful life as an accounting cost, but you already paid that cost once, up front. Adding it back gives the actual cash coming in each month, which is what pays back your initial investment — using monthly accounting profit instead would effectively subtract the printer's cost twice.

How does the failure rate affect my cost per print?

Failure rate is applied to the full cost of an attempt — material, electricity, depreciation, and labor — not just the wasted material, because a failed print also consumes machine time and hands-on time. At a 10% failure rate, for example, cost per successful print rises by about 11%, not a flat 10%, since on average you need slightly more than one attempt to get one success.

What's the difference between the margin and markup shown in the results?

Markup is profit as a percentage of cost; margin is profit as a percentage of price. A 100% markup on a $10 cost sets a $20 price, which is only a 50% margin — the two numbers describe the same profit in different ways, and this calculator shows both so pricing decisions use whichever framing you're used to.

Why is my printer investment excluded from monthly operating profit?

Monthly operating profit reflects ongoing running costs, including a depreciation charge for the printer, so it already accounts for the printer wearing out over time. The upfront purchase price itself is tracked separately, in payback and ROI, so it is not subtracted a second time from monthly profit.

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