| Studio Rent ($4,000/month) |
Fixed |
Carry as monthly overhead from Month 1 through Month 60. |
Allocating rent per ring, necklace, or redesign. |
| Studio Utilities ($600/month plus 0.2% of revenue) |
Semi-variable |
Split the $600 base from the 0.2% revenue-linked utility load. |
Putting all utilities into fixed overhead. |
| Professional Services ($700/month) |
Semi-fixed |
Hold at $700/month until advisory, accounting, or legal workload steps up. |
Scaling the retainer smoothly with each sale. |
| Owner and Staff Payroll ($317.5k/year in first year) |
Fixed |
Treat first-year staffing as committed overhead across the planned production range. |
Spreading salaries as variable labor per piece. |
| Precious Metal Sourcing ($300-$1,000 per piece) |
Variable |
Apply per finished piece by product type; engagement rings carry the high end. |
Treating metal buys as fixed inventory overhead. |
| Gemstone Sourcing ($80-$300 per piece) |
Variable |
Apply only when the design uses main, accent, pendant, diamond, or new stones. |
Using one average stone input for all pieces. |
| Bench Production Labor |
Variable |
Apply setting, engraving, casting, polishing, finishing, and design adaptation labor per piece. |
Loading outsourced bench work into fixed payroll. |
| Revenue-Linked Fees and Supplies |
Variable |
Add sales commissions, payment processing, workshop consumables, quality control, tool maintenance, and packaging as revenue-linked charges. |
Ignoring small percentages because each line looks minor. |