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How the Math Works
The whole point of this tool is numbers you can defend. Here is exactly what it computes — and the cost engine is validated against the live EVE Ref industry-cost API in CI on every change.
jobFee = EIV × (SCI × structureFeeBonus + facilityTax + SCC + alphaTax)
- EIV — estimated item value: Σ (base material qty × CCP adjusted price). ME does not change it.
- SCI — the system cost index for the activity, fetched live from ESI.
- SCC surcharge — 4% (manufacturing, invention & reactions; the 2025 research-only cut doesn't apply here).
- alpha tax — 0.25% when your clone state is Alpha.
- Invention/copy jobs charge over a 2%-of-EIV job-cost base.
| Structure | ME | TE | Job fee |
|---|---|---|---|
| NPC station | — | — | — |
| Raitaru | 1% | 15% | −3% |
| Azbel | 1% | 20% | −4% |
| Sotiyo | 1% | 30% | −5% |
Rig bonuses come straight from each fitted module: ME rigs cut materials (T1 −2%, T2 −2.4%), TE rigs cut job time (−20% / −24% — they now feed the ISK/hr numbers), and invention lab rigs cut invention time (−20/−24%) and the invention job fee (−10/−12%). Standard rigs scale with security — high ×1.0, low ×1.9, null/WH ×2.1; reactor rigs scale low ×1.0 / null ×1.1; Thukker faction rigs are low-sec specialists (×1.9 low, ×0.1 elsewhere), and the Thukker capital-component rigs carry a special −3.7% ME. Each rig only covers its product families, taken from the rigs' own affected-item lists — including the surprises: fuel blocks ride the Structure rig, T3 subsystems ride Advanced Medium Ship, and corvettes are covered by no rig at all. Research and copying rigs are listed for fit completeness but change no number the app computes. Material need per run: ceil(base × (1−ME/100) × (1−structME) × (1−rigME)), floored at 1 per run; job time: base × (1−TE/100) × (1−structTE) × (1−rigTE) × skills.
Unrefined alchemy intermediates reprocess at 50% × (1 + 0.02 × Scrapmetal Processing) × (1 − facility tax) — max 55% before tax; structure/rig/implant bonuses never apply to scrapmetal. Each output is floored per unit like the game (at 55%, Unrefined Dysporite → 95 Mercury + 40 Dysporite). Net cost per composite = (chain cost − reclaimed-input value) ÷ composite units — the number the alchemy comparison and watch quote.
- Sales tax = 7.5% × (1 − 0.11 × Accounting) — the March-2025 regime.
- Broker fee (NPC) = 3% − 0.3%×Broker Relations − 0.03%×faction standing − 0.02%×corp standing; player structure = 0.5% + the structure's set rate.
P = base × (1 + Encryption/40 + (Science1+Science2)/30) × decryptorMod, capped at 100%. Expected cost per BPC = cost per attempt ÷ P; invented BPCs start at ME 2 / TE 4 (T2 and T3 alike). T3 relic tiers set base odds and runs; the relic price rides every attempt.
Market prices use the 5%-by-volume percentile — the realistic "fill the order book" price, not the optimistic midpoint most calculators quote. Ore in reprocess comparisons uses the volume-weighted median of the ask side, so a single troll order can't fake a deal. Fuzzwork aggregates are the source, with an automatic fallback that recomputes the same stats from raw ESI order books when Fuzzwork is down.
Lines per pool = 1 + skill + advanced skill: Mass Production (+Advanced) for manufacturing, Laboratory Operation (+Advanced) for science, Mass Reactions (+Advanced) for reactions.