Why Most 3D Printing Sellers Undercharge
When hobbyists transition from printing for fun to printing for profit, they typically look at one number: the filament cost. A 45g print on a $22/kg spool costs about $0.99 in material — and suddenly they're selling it for $4 to feel like they're making something. But they're usually losing money when all costs are considered.
Accurate pricing requires accounting for at least five cost categories. Miss any one of them and your "profit" evaporates.
The 5 Costs Every 3D Print Seller Must Track
1. Filament (Material) Cost
This is the only cost most sellers track. The formula is simple: (Spool price ÷ Spool weight in grams) × Part weight in grams = Material cost. For a 1kg PLA spool at $22, that's $0.022/g. A 45g part costs $0.99 in filament.
Don't forget to add 5–10% for failed prints and support structures. In practice, that 45g part might require 50g of filament to account for failed first layers and discarded test prints.
2. Electricity Cost
A typical FDM printer draws 100–200W during active printing. Use this formula: (Watts ÷ 1000) × Print hours × $/kWh = Electricity cost. A 150W printer running for 4 hours at the US average of $0.13/kWh costs $0.078. Small individually, but meaningful across hundreds of prints per month.
3. Printer Depreciation
Your printer cost money and will eventually wear out. A $300 entry-level FDM printer with a conservative 2,000-hour print lifespan has a depreciation cost of $0.15 per hour. Add this to every print. Higher-end printers or those with shorter maintenance cycles may cost more. Don't print for free just because you already bought the machine.
4. Post-Processing & Packaging
Support removal, sanding, painting, acetone treatment, and applying vinyl details all take time. Even if you skip most finishing steps, packaging materials — boxes, tissue paper, bubble wrap, tape — cost $0.50–$3.00 per order depending on item size. Build this into a flat per-order overhead estimate.
5. Your Time
This is the most commonly ignored cost. Set a minimum hourly rate for yourself — even $15/hour — and track time spent on design, slicer prep, print monitoring, post-processing, packaging, and customer communication. If a print takes 20 minutes to package and ship, that's $5 of labor at $15/hr. Add it.
A Complete Real-World Pricing Example
You're printing a custom articulated dragon model (popular Etsy category) and the following is true:
| Cost Item | Calculation | Cost |
|---|---|---|
| Filament (120g @ $0.022/g × 1.08 waste) | 120g × 1.08 × $0.022 | $2.85 |
| Electricity (150W × 8h × $0.13) | 1.2 kWh × $0.13 | $0.16 |
| Printer depreciation ($0.15/hr × 8h) | 8 × $0.15 | $1.20 |
| Packaging | Box + tissue | $1.50 |
| Your time (30 min @ $15/hr) | 0.5 × $15 | $7.50 |
| Total True Cost | $13.21 | |
| 3× Markup (selling price) | $13.21 × 3 | $39.63 |
| Etsy fees (~11% of $39.63) | −$4.36 | |
| Net Profit | $22.06 |
One well-priced dragon print generates $22 of actual take-home profit. At 3–4 prints per day, that's $66–$88 of profit per day — a real side income. But if you'd priced based on filament alone and charged $12, you'd actually be losing money after Etsy fees and your time.
Common Pricing Mistakes to Avoid
- Pricing to beat competitors who haven't calculated their costs either — a race to the bottom.
- Ignoring your time because "it's a hobby anyway." Your time has value.
- Using a single markup for all products. Functional/custom pieces command premium markups; commodity items need volume to compensate.
- Not accounting for Etsy's shipping fee tax. Etsy charges transaction fees on shipping revenue too — so "free shipping" is never truly free for the seller.
- Forgetting failed prints. A 10% failure rate on filament is a real cost; bake it in.
Use the Calculator to Get Your Numbers Right
Rather than doing this spreadsheet math for every SKU, use our 3D Printing Cost Estimator. Enter your filament price, spool weight, part weight, print time, and electricity rate. Then use the markup slider to set your desired margin and see the suggested selling price instantly. Pair it with our Etsy Profit Calculator to confirm the final number after Etsy fees.