Profitability and payback: build a realistic scenario
Include the whole investment, test adverse conditions and keep cash flow separate from a forecast.
ASIC.tools · Reviewed
Define the investment
The invoice for an ASIC is only one part of the investment. Include delivery, applicable import charges, electrical work, ventilation, networking and initial spares. Keep refundable deposits and cash reserves separate from equipment cost so you can see both capital committed and money still available. Use the actual quotation and applicable local rules rather than assuming a universal tax or installation charge.
Separate operating cash flow
Start with credited mining revenue, then subtract energy, pool fees not already deducted, hosting and recurring operating costs. Repairs and service travel should have an explicit budget. Accounting profit, depreciation, loan principal, interest and taxes are different categories; label them rather than mixing them into one unexplained number. A positive operating margin does not mean the original investment has been recovered.
Understand simple payback
If a hypothetical installation costs $3,000 and produces a constant $3/day after the costs included in your model, simple payback is 1,000 days. At $1/day it is 3,000 days. At zero or negative cash flow there is no finite payback in that scenario. The formula assumes unchanged conditions and ignores the time value of money; it is a comparison tool, not a promised date.
Build three scenarios
Keep a base case, an adverse case and a favourable case, all with dated inputs. In the adverse case, lower revenue, increase the energy tariff and include a repair outage together. These assumptions test resilience; their percentages are chosen by you and are not probabilities. Avoid changing only Bitcoin's price: network difficulty, fees, effective hashrate and actual uptime also affect mining results.
Use a break-even tariff and a farm log
For a consistent period, the operating break-even energy tariff is revenue after pool fees minus non-energy operating costs, divided by total kWh. It excludes recovery of the purchase price unless you explicitly add that cost. Save devices in My Farm, export a backup and compare planned versus measured energy and payouts. Recalculate after tariff changes, a new operating mode, repairs or a significant revenue change.
