What this is showing you
Bitcoin's block reward drops by half every 210,000 blocks — roughly every four years. Litecoin halves every 840,000 blocks. When the halving fires, every miner's revenue per TH/s instantly drops by 50% (assuming nothing else changes). Your electricity cost stays the same, so your daily profit margin compresses.
The break-even kWh rate row is the most important. It tells you the highest electricity rate where this rig still earns more than it spends. If your real rate is above the post-halving break-even, the rig becomes a money loser the moment the halving block confirms.
Why we don't model price + difficulty drift
Historically, Bitcoin's price tends to climb in the 6-18 months after a halving (supply shock), and network difficulty drops short-term as the least-efficient miners capitulate, then climbs back. Both effects reduce the "true" revenue cut from -50% to roughly -25% within a year. We don't model them because they're guesses, not arithmetic. The 50% figure is the conservative floor — if you're already profitable at -50%, you're fine.
How to use this
- Pick your rig via the search bar.
- Set your real electricity cost with the slider — match what you actually pay (utility bill / kWh, not your provider's "average").
- Read the post-halving profit row. Positive in green: rig survives. Negative in red: rig dies, plan accordingly.
- Use the break-even row to negotiate. If post-halving break-even is $0.05/kWh and you pay $0.06, can you shop for $0.04 power somewhere?