Pool Mining vs Solo Mining: Strategies and Comparison 2025

Introduction: Two Mining Philosophies

When you decide to mine Bitcoin, a fundamental question arises: should you join a mining pool or try your luck solo? This seemingly technical choice actually reflects two different visions of participation in the Bitcoin network.

Pool mining pools the computing power of thousands of miners to obtain regular rewards, divided proportionally. Solo mining is a solitary bet: you earn nothing for months, even years... until the day you find a block and pocket the entire reward.

In 2025, with a network hashrate exceeding 600 EH/s and a block reward of 3.125 BTC (~€265,000 at current prices), this choice has considerable implications. This guide thoroughly analyzes both approaches to help you define your strategy.

Table of Contents

1. Understanding Mining Modes
2. Pool Mining in Detail
3. Decentralized Pools: The New Wave
4. Solo Mining: For Whom?
5. Taxation by Mode
6. Optimal Strategy by Profile
7. Implications for Decentralization
8. FAQ

1. Understanding Mining Modes

Pool or solo: regularity versus independence, mathematically equivalent but radically different.

1.1 Mining in Brief

Bitcoin mining consists of solving a cryptographic problem (finding a valid hash) to validate a block of transactions. The first miner to find the solution wins:

• Block reward: 3.125 BTC (post-halving 2024)
• Transaction fees: Variable (0.1 - 2+ BTC per block)

Current difficulty: Finding a block statistically requires ~600 EH of hashrate for 10 minutes, equivalent to 3 million Antminer S21s running together.

1.2 Pool Mining: Unity is Strength

Principle: Thousands of miners combine their computing power. When the pool finds a block, the reward is shared according to each one's contribution.

Miner A (10 TH/s) ─┐
Miner B (50 TH/s) ─┼─→ Pool (10 PH/s total) ─→ Finds ~1.7 blocks/day
Miner C (100 TH/s)─┤                          ↓
[...thousands...]  ─┘                     Proportional distribution

Advantages:

• Regular and predictable income
• Reduced variance
• Suitable for all sizes

Disadvantages:

• Pool fees (1-3%)
• Dependency on a third party
• Network centralization

1.3 Solo Mining: The Independence Bet

Principle: You mine alone, directly against the network. You earn nothing until the day you find a block... and win everything.

Your ASIC (200 TH/s) ─→ Bitcoin Network (600 EH/s)
                              ↓
              Probability of finding a block: 1 in 3 million
              Average time before finding: ~140 years

Advantages:

• Full reward (3.125+ BTC)
• No pool fees
• Total sovereignty
• Contribution to decentralization

Disadvantages:

• Extremely random income
• May never find a block
• Psychological stress

1.4 Mathematical Comparison

📌 Key Point: In the long run, the expected gain is identical (minus fees). The difference is in variance: regularity vs lottery.

2. Pool Mining in Detail

Foundry, AntPool, Ocean: compare payment methods, fees, and decentralization.

2.1 Major Pools (December 2025)

2.2 Payment Methods

Recommendation by profile:

2.3 Fee Comparison

2.4 Pool Selection Criteria

2.5 Typical Configuration

Connection parameters (example Braiins Pool):

URL: stratum+tcp://eu.stratum.braiins.com:3333
Worker: your_account.worker1
Password: x

Recommended failover configuration:

1. Primary pool (70% of time under normal conditions)
2. Secondary pool (backup if pool 1 unavailable)
3. Solo mining (last resort, network participation)

3. Decentralized Pools: The New Wave

Ocean, Stratum V2, and P2Pool: addressing the risk of hashrate centralization.

3.1 The Centralization Problem

The concentration of hashrate in a few pools poses risks:

3.2 Ocean Mining: Jack Dorsey's Revolution

Ocean (formerly OCEAN Pool) is a pool launched in 2023 by Block (ex-Square) with a unique philosophy:

Features:

• Non-custodial: Direct payments to miners (no account)
• Stratum V2: Decentralized protocol
• TIDES: Transparent payment method
• No MEV/censorship: Includes all legitimate transactions

TIDES operation:

1. Miner submits shares to pool
2. Each share contributes to the "tide" (TIDES)
3. At each block found, proportional payment
4. Direct payment to your address (non-custodial)

Advantages:

• No KYC
• Direct payments (no balance on pool)
• Contribution to decentralization
• Total transparency

Disadvantages:

• Hashrate share still low (2%)
• Slightly higher variance
• Less mature infrastructure

3.3 Stratum V2: The Future Protocol

Stratum V1 (current):

• Pool builds the block template
• Miners only hash
• Centralization of transaction control

Stratum V2 (new):

• Miners can build their own template
• Decentralization of transaction selection
• Better security and efficiency

Pools supporting Stratum V2:

• Ocean (native)
• Braiins Pool (in progress)
• Some others in development

3.4 P2Pool: The Return?

P2Pool was the first truly decentralized pool:

• No central server
• Secondary blockchain between miners
• Abandoned because too complex

Revival initiatives:

• P2Pool for Monero (active)
• Modern Bitcoin P2Pool projects
• Integration into Stratum V2

4. Solo Mining: For Whom?

143 years of waiting with an S21, but 100% of the reward: sovereign lottery.

4.1 Probability Calculation

Formula:

Probability per block = Your hashrate ÷ Network hashrate
Blocks per day: 144
Average time before block = 1 ÷ (Probability × 144)

Concrete examples:

4.2 Testimonies of Lucky Solo Miners

Documented cases of blocks found solo:

These cases are exceptional. For every success story, thousands of solo miners have never found a block.

4.3 Solo Mining Configuration

Via Solo CK Pool (solo mining service):

URL: stratum+tcp://solo.ckpool.org:3333
Worker: your_bitcoin_address
Password: x

Pure solo (Bitcoin Core):

1. Install Bitcoin Core (full node)
2. Configure RPC
3. Use mining software (CGMiner, BFGMiner)
4. Point to your local node

Solo CK advantage: Managed infrastructure, no need for full node Disadvantage: Dependency on a third party (contradiction with solo philosophy)

4.4 Hybrid Strategy: Best of Both Worlds

Recommended allocation for "believers":

Impact calculation:

• Total hashrate: 10 PH/s
• 90% in pool: regular income ~0.15 BTC/day
• 10% solo: lottery 1 PH/s → block every ~2.9 years on average

5. Taxation by Mode

Pool or solo, same tax treatment: income taxable upon receipt.

5.1 Pool Mining: Regular Income

Tax characteristics:

• Frequent and predictable income
• Easy documentation
• Valuation at market rate on day of receipt

Applicable regime: BNC (occasional) or BIC (professional)

Documentation:

• Pool statements (CSV exports)
• Payment history
• Reference rate used

5.2 Solo Mining: One-Time Gain

Tax characteristics:

• Rare but significant gain (~€265,000 for a block)
• Potentially different classification?
• Income spike in one year

Open questions:

• Is a found block an "exceptional gain"?
• Possibility of spreading (not currently provided)?
• VAT applicable?

💡 Advice: In case of a block found solo, consult a tax lawyer before any conversion to euros.

5.3 Recommended Documentation

6. Optimal Strategy by Profile

From beginner to industrial, from pragmatist to idealist: your personalized strategy.

6.1 Decision Matrix

6.2 Detailed Recommendations

Small Miner (< 1 PH/s / < 5 ASICs)

Strategy: Exclusive pool mining

Intermediate Miner (1-10 PH/s)

Strategy: Pool + solo lottery

Large Farm (> 10 PH/s)

Strategy: Maximum diversification

6.3 The Idealist Option: Priority to Decentralization

If your main motivation is to support Bitcoin rather than maximize profits:

1. Ocean as primary pool (non-custodial, Stratum V2)
2. Solo mining as permanent backup
3. Avoid pools > 20% of hashrate (Foundry, AntPool)
4. Participate in tests of new decentralized protocols

7. Implications for Decentralization

Foundry 28%, AntPool 18%: your pool choice impacts Bitcoin's resilience.

7.1 Current State of Centralization

Top 3 pools = 58% of hashrate (December 2025)

Critical threshold: A pool > 25% can theoretically:

• Censor transactions
• Execute selfish mining attacks
• Suffer impactful regulatory pressures

7.2 Miner Responsibility

Each miner contributes to network health through their pool choice:

7.3 Emerging Solutions

7.4 What You Can Do

1. Diversify: Don't put all your hashrate in one pool
2. Favor pools < 20% of hashrate
3. Test Ocean or Stratum V2 pools
4. Allocate part to solo mining if possible
5. Monitor hashrate distribution (mempool.space)

8. FAQ

Q1: If the expectation is the same, why not only do solo?

Answer: The mathematical expectation is identical, but the variance is radically different. In a pool, you receive small amounts regularly. Solo, you may receive nothing for years. For most miners (bills to pay, need for cash flow), pool regularity is necessary.

Q2: Can pools "steal" my blocks?

Answer: Theoretically, a dishonest pool could under-report found blocks. In practice, it's detectable (blocks are public on the blockchain) and would destroy their reputation. Established pools have no interest in cheating.

Q3: What is "pool hopping"?

Answer: It's the practice of frequently changing pools to optimize gains based on payment methods. It was more profitable before, but modern pools use systems (Score, PPLNS) that penalize this practice.

Q4: How can Ocean be "non-custodial"?

Answer: Ocean uses TIDES, a method where payments are made directly in the block's coinbase transaction to miners' addresses. There is never a balance held by the pool.

Q5: What happens if my pool closes?

Answer: You lose the unwithdrawn balance (hence the interest in non-custodial pools like Ocean). Always configure a backup pool and regularly withdraw your earnings.

Q6: Does solo mining with 1 ASIC make sense?

Answer: Economically, no (143 years to find a block on average). Philosophically, yes: you participate in decentralization. It's an activist act more than economic.

Q7: Pools with 0% fees, too good to be true?

Answer: Often yes. Fees can be hidden (spread on price, unfavorable PPLNS variance). Some pools (AntPool) offer 0% to attract miners and gain hashrate, which gives them power over the network.

Q8: Does Foundry censor transactions?

Answer: Foundry (USA) has stated it complies with OFAC sanctions. Concretely, some transactions linked to sanctioned addresses could be excluded from their blocks. This is a debate topic in the community.

Conclusion

Summary

Final Recommendation

For most miners, the optimal strategy combines:

1. Primary pool (70-90%): Regular income to cover costs
2. Secondary pool (10-20%): Diversification and backup
3. Solo (0-10%): Lottery and contribution to decentralization

The pool choice matters as much as the pool/solo decision. Favor pools that:

• Respect your privacy (no mandatory KYC)
• Contribute to decentralization (< 20% of hashrate)
• Adopt new technologies (Stratum V2)
• Are transparent about their practices

Bitcoin is a trust-minimized system. Your mining choice should reflect this philosophy.

📚 Related Articles - Bitcoin Mining

Complete your reading with our full series on mining:

• 📋 Bitcoin Mining France: Legal and Tax Framework — Mining taxation by your mode
• ⚡ Home Mining: Optimizing Your Home Setup — Configure your miner and choose your pool
• 🏭 Mining Farm: Creating a Farm in France — Scaling and pools for pros
• 🔐 Seed Phrase Storage: Methods and Supports — Secure your mining rewards

🔗 Additional Resources

To understand the Bitcoin ecosystem:

Topic	Article
Cycles	Bitcoin Cycles: Halving and S2F
Bitcoin	Understanding Bitcoin: Beginner's Guide
Decentralization	Bitcoin and States: Race to Adoption
Security	Crypto OPSEC: Personal Security

Sources and References

Hashrate Data

• Mempool.space: Pool distribution
• Blockchain.com: Hashrate charts
• CoinWarz: Mining profitability

Technical Documentation

• Bitcoin Core documentation
• Stratum V2 specification
• Ocean documentation

Industry Analysis

• Cambridge Bitcoin Electricity Consumption Index
• Braiins mining reports

Article written in December 2025 - Mining data and pool market shares may change rapidly. Consult current sources for up-to-date data.