Typically in crypto, network difficulty tends to increase over time, meaning a miner will generate less crypto with the same hardware. Accounting for this changing difficulty is essential to generate long term profitability predictions. The diff change value is calculated by looking at the current difficulty and comparing it to the 12 hour moving average of the difficulty one month ago. Diff Change value is very large. Future profitability estimates may be inaccurate.
Consider making Diff Change smaller or turning off Dynamic Difficulty. Hashrate is the only value you need to input to use this calculator, we do the rest of the work for you! Make sure that you have the correct hashrate suffix selected. The Break-Even Analysis feature can help you predict how long it will take to become profitable for a given setup.
If the network difficulty is increasing quickly, this will greatly increase your break-even time. The diff change can be excluded from the calculation by toggling the “Use Diff Change” switch. Why is my break-even time 0 or never? If your break-even time is 0 you have likely forgotten to input your hardware cost below. This is likely due to a large diff change value which causes your predicted profitability to turn negative in the future. You could try lowering the diff change for a less agressive prediction or disable it altogether. Recurring costs are fixed costs such as rent or internet.