Solo Mining vs Pool Mining: Probability, Payouts and Costs
Updated: October 29, 2026.
Solo mining pays when your own mining work finds a valid block. Shared pool mining distributes rewards under a pool’s accounting method, giving an individual miner a less variable income stream. The important difference is the timing and uncertainty of payments, not a promise that one approach creates more Bitcoin from the same work.
For a small Bitcoin miner, the expected value of a year of hashing can be very different from the amount actually received during that year. Electricity must still be paid even when no solo block is found.
Three arrangements to distinguish
| Arrangement | Who receives a block reward? | What the miner operates |
|---|---|---|
| Independent solo mining | The miner whose work finds a valid block, subject to successful submission and network acceptance. | Mining hardware and the infrastructure needed to obtain work and submit blocks. |
| Solo mining service | The successful miner under the service’s rules, less any applicable fee. | Hardware connected to a service that supplies work and block-submission infrastructure. It does not turn solo rewards into shared rewards. |
| Shared mining pool | Participants are credited according to the chosen reward model. | Hardware and a working pool connection; the operator coordinates the pool’s work and accounting. |
The Bitcoin developer guide describes the distinction between solo and pooled mining and explains how shares represent contributed work.
Estimate the chance of finding a block
With fixed hashrate and difficulty, a common approximation is:
Expected blocks λ = hashrate in hashes/second × active seconds
÷ (network difficulty × 2^32)
Chance of at least one block ≈ 1 − exp(−λ)Use active time, not calendar time that includes downtime, and keep hashrate units consistent. This model assumes independent hashing attempts and stable inputs. Actual network difficulty, hardware performance and connection conditions change.
If a hypothetical setup has an expected block count of 0.1 over a chosen period, its approximate probability of at least one block is 9.5%, not 10% guaranteed income. There is about a 90.5% probability of finding none during that period under those assumptions.
A mean waiting time is not a deadline. Mining for longer without success does not make an otherwise identical next hash more likely to succeed. A pool connection or a large number of accepted shares does not change the network block target.
Compare expected value with affordable cash flow
Before fees and technical differences, equivalent valid hashing work has the same underlying chance of discovering blocks. A shared pool reduces the variability borne by an individual participant. Solo mining concentrates the possible payment into rare outcomes.
Compare the electricity and hosting you can afford to pay during a period with no solo payout. For example, a hypothetical constant 3 kW load uses 72 kWh per day. At an illustrative tariff of $0.10 per kWh, that is $7.20 per day for electricity alone, whether a block is found or not. Cooling, repairs, hosting and equipment costs may add to it.
The Bitcoin mining calculator can help estimate operating costs and expected mining income. A positive average estimate is not a prediction that a solo miner will receive payments during the selected period.
When a shared pool is the more practical choice
- You need regular credited rewards to help cover ongoing operating costs.
- Your hashrate is small relative to the Bitcoin network.
- You prefer the operator to handle shared reward accounting and block-submission infrastructure.
- You cannot comfortably absorb a long period of electricity costs with no block reward.
Shared pools still have operator, connection and payment risks. Review the reward model, fee, accepted work and minimum payout. The Bitcoin pool comparison covers operator selection; this article focuses on the solo-versus-shared decision.
If you choose a solo service
Confirm how the service identifies the winning miner, which coin and algorithm it supports, the fee charged on a successful block, how rewards are paid and what happens if submission fails. Test your worker name, receiving address and accepted work before relying on the configuration.
Do not apply Bitcoin probabilities to Litecoin, Dogecoin or Zcash. They have different network conditions and protocol rules; merged mining can also change how rewards are earned. Calculate the relevant network separately.
Questions about solo mining
Can one ASIC find a Bitcoin block?
It is technically possible, but probability depends on effective hashrate, difficulty and active time. Possibility should not be treated as a reliable source of income.
Does a solo pool share rewards among everyone connected?
Usually not: a solo-style service pays the successful miner under its published rules. Read the service’s terms rather than relying only on the word “pool”.
Is solo mining always more profitable because there is no shared pool fee?
No. A solo service may charge its own fee, independent operation has infrastructure costs, and realised payouts can be zero over the period you can afford to operate.
