Status: NO-GO (Economic Unviability) Location: Denmark (Copenhagen) Era: 2026 (Post-Tax Reform)
This repository documents the research and unit economics for a proposed home CPU mining operation ("Plainview").
Conclusion: NO-GO. Home CPU mining in Denmark is economically unviable and will remain so through 2030 under standard conditions.
Comprehensive analysis of 5 core variables + 5 alternative scenarios yields a definitive investment capability rating.
| Scenario | Payback Period | Verdict | Notes |
|---|---|---|---|
| Standard Mining | Infinite (Loss) | HARD NO | Capital destruction. |
| Selective Mining | 38 Years | NO | Tiny profit (€28/yr) doesn't justify hardware. |
| Alternative Hardware | 14-20 Years | NO | No CPU exists that beats the efficiency constraint. |
| Alternative Pools | 15 Years | NO | Marginal gains (<5%) from auto-switching. |
| Qubic (AI Training) | 3.0 Years | SPECULATIVE BUY | Viable only if you accept high startup risk. |
| Electricity Rate Lock | 7.3 Years | MAYBE | Viable only if you secure <0.85 DKK/kWh fixed rate. |
[!CRITICAL] Strategic Recommendation: Do not invest in hardware for mining revenue. The risk-free return of an index fund (S&P 500) outperforms even the best-case mining scenario by 2.8x.
Only Build If: You treat the hardware cost as an "Educational Fee" or "Hobby Expense" with zero expectation of financial return.
The following figures use verified conservative estimates for Monero (RandomX) mining.
| Rig Configuration | CPU Price | Platform Cost | Total CapEx |
|---|---|---|---|
| Ryzen 7 5700X | ~€172 | ~€413 | 4,369 kr (€585) |
| Ryzen 9 9950X | ~€513 | ~€560 | 8,015 kr (€1,073) |
Electricity Rate: 0.71 DKK/kWh (effective 2026)
| Metric | Ryzen 5700X | Ryzen 9950X |
|---|---|---|
| Hashrate | 10.3 kH/s | 20.4 kH/s |
| Power (Wall) | 95 W | 155 W |
| Annual Revenue* | ~635 kr | ~1,264 kr |
| Annual Electricity | -404 kr | -1,058 kr |
| Maintenance | -411 kr | -411 kr |
| Net Profit (Annual) | -180 kr (LOSS) | -205 kr (LOSS) |
*Revenue based on verified SupportXMR pool data (Jan 2026).
- Payback Period: Infinite (Operational Loss)
- Optimized Strategy (Selective Mining): Mining only during cheap overnight hours (<0.50 DKK/kWh) yields a tiny annual profit of ~210 kr.
- Resulting Payback: 38 Years (Still unviable).
- Risk: If the 2026 electricity tax cut expires in 2028, operating costs double, guaranteeing heavy losses.
Only two scenarios offer material viability:
- Qubic (AI Training): Potentially 3x revenue uplift, but high speculative risk (micro-cap token).
- Rate Lock: Securing a fixed electricity rate <0.85 DKK/kWh (e.g., via energy co-op) reduces payback to ~7 years.
Initial research files contained a discrepancy where revenue was artificially doubled in the Cost analysis. This repository corrects that error. We rely on the verified revenue of ~0.03 EUR/kH/day.
Full detailed breakdown available in docs/unit-economics/: