3D Printer: Buy vs. Outsource Calculator
Enter your printer cost, materials, electricity, and outsourcing rates to instantly compare the total cost of ownership against paying a print service. The calculator finds your break-even quantity and shows cumulative costs over 24 months so you can see exactly when buying pays off.
How this calculator works
The calculator separates costs into two buckets. On the buying side it tracks the upfront investment (printer plus accessories) and the variable cost per good part, which is filament plus electricity scaled up by your failure rate so failed prints are automatically included. Monthly maintenance - nozzle replacements, lubricant, bed adhesive - is added as a flat recurring charge. On the outsourcing side it adds your per-part service price to a per-order shipping cost divided across the parts in each order, giving an effective cost per piece. Comparing the two totals over 24 months, and dividing the upfront cost by the per-part saving, yields the break-even quantity and the number of months to reach it at your expected volume.
Understanding the break-even point
The break-even quantity is the number of parts you must print before the cumulative saving on each part covers the upfront cost of the machine. For example, if your printer plus accessories costs $430 and you save $2.15 per part over outsourcing, you need exactly 200 parts to break even. At 20 parts per month that is 10 months. Before that point outsourcing is still cheaper in total; after it, every additional part is pure saving. The break-even calculation assumes your usage stays constant. If your print volume is seasonal or uncertain, use the worst-case (lower) volume estimate to get a conservative timeline.
Factors that shift the decision
Several real-world factors can tip the comparison either way. Failure rate has an outsized effect: even a 15% failure rate inflates your effective filament and electricity cost by roughly 18%, narrowing the margin. Post-processing time - sanding, priming, support removal - is not captured in material or electricity cost; if your hourly time has value, assign it a rate and add it to the per-part buying cost. Intellectual property is another factor: outsourcing sends your files to a third party, which matters for proprietary designs. Lead time is also important since a service bureau typically takes 1-5 business days versus hours for an in-house print. Finally, printers depreciate: a machine bought for $350 today may be worth little in 3-4 years, so for very long payback scenarios consider whether the printer will still function when you reach break-even.
When outsourcing makes more sense
Outsourcing is usually the better choice when print volume is low (fewer than 5-10 parts per month for a budget printer), when the required material is exotic (high-temperature polymers, flexible TPU at scale, metal-infused filament) and you would need a specialised and expensive machine, when turnaround time is not urgent and batching orders can keep per-part shipping cost low, or when storage space for a printer and filament inventory is a constraint. Print bureaus also handle quality control; if dimensional precision is critical and you lack experience tuning a machine, outsourcing removes that variable.
Typical 3D printer ownership costs by category
| Printer tier | Price range | Filament / kg | Typical power | Failure rate |
|---|---|---|---|---|
| Budget FDM (Ender 3-class) | $150-$350 | $18-$28 | 80-150 W | 10-20% |
| Mid-range FDM (Prusa MK4-class) | $500-$1,000 | $20-$35 | 100-200 W | 5-10% |
| Enclosed FDM / engineering | $1,000-$3,000 | $30-$80 | 150-300 W | 5-8% |
| MSLA resin (desktop) | $200-$600 | $30-$60 / kg | 30-80 W | 5-15% |
| Professional SLA / SLS | $3,500+ | $80-$200+ / kg | 200-500 W | 2-5% |
Approximate ranges for common FDM desktop printers. Exact values vary by brand, region, and usage.
Frequently asked questions
How accurate is the break-even calculation?
The formula is exact given the inputs: (printer + accessories) divided by (outsource cost per part minus your variable cost per part). The main uncertainty is in your estimates. Failure rate in particular can swing the result significantly: beginners should use 15-20%, experienced operators can use 5-8%. If your actual volume turns out lower than projected, the payback period stretches proportionally.
Does the calculator include my time?
No. It only covers cash costs - materials, electricity, maintenance, and service fees. Printing requires hands-on time for setup, monitoring, part removal, and post-processing. If your time has a cost (e.g., you run a small business), add an estimated hourly rate multiplied by hours per part to the buying side. This often reduces or eliminates the advantage of in-house printing at low volumes.
What should I enter for the failure rate?
Failure rate is the percentage of print jobs that produce an unusable part and waste material. A good benchmark for a well-tuned budget printer operated by an experienced user is around 5-8%. Beginners on an entry-level machine typically see 15-25% until they learn to tune bed levelling, first-layer adhesion, and retraction. If you are unsure, start with 15% and adjust as you gain data.
Should I use the current outsource price or a volume discount?
Enter the price you actually pay per part today. If you typically batch 10 or more parts per order to get a discount, enter that discounted rate and set the parts-per-order field to match your typical batch size. The calculator handles the shipping amortisation for you. Compare like-for-like: use the outsource price for the same material and quality level you expect from in-house printing.
What is not included in this calculation?
The calculator omits: operator labour and post-processing time; space and ventilation requirements (relevant for ABS, resin); filament moisture management and storage; printer depreciation and resale value; software licences beyond a one-time accessory cost; and shipping for parts sent to you from a service bureau when comparing against your own machine. For a high-stakes purchase decision, build a full spreadsheet that adds a labour line and a resale-value line to make the numbers more robust.
How does filament type affect the result?
Filament type affects three inputs: cost per kilogram (PLA is cheapest at roughly $18-$28/kg, engineering-grade nylon or polycarbonate can reach $60-$120/kg), failure rate (flexible or moisture-sensitive materials tend to have higher failure rates), and electricity consumption (materials requiring high bed temperatures like ABS use more power per hour). Change the filament cost and check how it moves the break-even.