Firsthand Bitcoin · Data · Bitcoin miners
Data / Difficulty adjustments / 2025
The size of every bitcoin difficulty retarget, as a percentage.
Difficulty adjustment opened 2025 at +0.61% (January 12, 2025) and closed at +0.04% (December 25, 2025), down 93.0%. The high was +7.96% on July 12, 2025 and the low -7.48% on June 29, 2025.
| Month | Month end |
|---|---|
| January 2025 | -2.12% |
| February 2025 | -3.15% |
| March 2025 | +1.43% |
| April 2025 | +1.42% |
| May 2025 | +4.38% |
| June 2025 | -7.48% |
| July 2025 | +1.07% |
| August 2025 | +0.20% |
| September 2025 | +4.63% |
| October 2025 | +6.31% |
| November 2025 | -1.95% |
| December 2025 | +0.04% |
Each bar is one retarget. Most are small and upward, because hashrate keeps growing. The large negative ones mark the moments miners switched off in numbers: China’s mining ban in mid-2021 produced the biggest cut in bitcoin’s history, −28%.
Other years: 2026 · 2024 · 2023 · 2022 · 2021 · 2020 · 2019 · 2018 · 2017 · 2016 · 2015 · 2014 · 2013
Also in 2025: Bitcoin price · Distance from the all-time high · 200-day and 200-week averages · Network hashrate · Mining difficulty · Fees paid to miners · Transactions per day · Hashprice · Miner revenue · Miner prices per terahash · Bitmain releases and the bitcoin price · Break-even electricity price