What If We Mined Bitcoin Instead, A Director's Guide to the Real Economics

Every few months a UK director asks about mining Bitcoin rather than buying it. Here is the honest answer, including when it makes sense and when it almost never does for a typical UK SME.

Bitcoin mining is the process by which new Bitcoin is created and transactions are verified. Miners compete to solve computational problems. The winner adds the next block to the blockchain and receives newly created Bitcoin as a reward.

This sounds appealing. The reality for a UK SME is more complicated. Mining profitability depends on three variables: the Bitcoin price, your electricity cost, and your hardware efficiency relative to the global network. UK industrial electricity typically costs 15–25p per kilowatt hour. Competitive mining operations run at 3–5p per kilowatt hour in locations with cheap hydroelectric or stranded energy. At UK energy prices, mining is rarely economical for a business without a specific energy advantage.

The capital expenditure for meaningful mining is substantial. Hardware depreciates quickly as newer, more efficient machines enter the market. The accounting treatment is different from treasury allocation — mining income is revenue, not a capital asset.

For most UK companies with surplus cash and no specific energy cost advantage, purchasing Bitcoin directly is simpler, more predictable, and more capital-efficient than mining. The exception is a business with genuinely cheap or surplus energy, a manufacturer with significant own generation, for instance. If that is your situation, the economics are worth modelling carefully. If not, direct allocation is almost certainly the right approach.