Why Your Mining Reward Keeps Dropping Every Day: Five Real Causes

If your daily payout is slowly declining while your equipment's hashrate stays the same, it rarely means something broke - more often it's an external factor that shifts every two weeks. Here are the main causes in order of likelihood.

Five Causes of Declining Reward

1. Network difficulty increasing. Mining difficulty recalculates every 2016 blocks (about two weeks) and rises if the network's total hashrate has grown. With rising difficulty and unchanged hashrate on your end, your share of the network falls, and so does your BTC income
2. Hashprice declining. Hashprice combines BTC price and network difficulty into a single income-per-hashrate metric. Even with a rising BTC price, hashprice can fall if difficulty rises faster
3. Effective worker hashrate dropping. Some ASIC chips may have failed without fully stopping the device - check actual hashrate in your pool dashboard against the manufacturer's rating
4. Downtime that went unnoticed. Brief offline periods over a day add up and reduce daily income, even if the worker is running fine right now
5. Pool luck volatility (for PPLNS). Under PPLNS, income depends on how many blocks the pool actually found during a period - on unlucky days, income falls below theoretical expectation

What to Do

• Compare income in BTC, not USD. If BTC income is stable but USD income is falling, the cause is the exchange rate, not mining
• Check network difficulty history on hashrateindex.com or a similar tracker - a timing match with your income drop confirms the first cause
• Compare your worker's rated and actual hashrate in your pool dashboard - a discrepancy above 5% points to a hardware issue
• If you're on PPLNS, switch to FPPS or PPS+ for more predictable income if volatility is a concern for you

Compare income across pools and schemes in our payout breakdown.

Frequently Asked Questions

How often does network difficulty change?

Every 2016 blocks - roughly every two weeks. The change can go either up or down depending on whether the network's total hashrate grew or shrank over the period.

Is it normal for BTC income to keep declining?

Yes, it's a long-term trend - network difficulty generally rises over time as more efficient hardware appears and miner competition grows. To maintain income, you either need to upgrade hardware or find cheaper electricity.