Pool vs solo mining
Mining is a lottery, and lotteries have a variance problem: you can do everything right and still win nothing for a very long time. Mining pools exist to fix that. This guide explains how pools work, what they cost, and when — if ever — mining alone makes sense.
Variance: the core problem
Imagine your hardware represents a tiny fraction of the network's total mining power — say, one millionth. On average, you'd expect to win one block out of every million. If blocks come every ten minutes, that's roughly one win every nineteen years — and "on average" hides enormous spread. You could win twice in a year or go decades with nothing. Your electricity bill, meanwhile, arrives every month without fail.
This is variance: the gap between expected earnings and actual earnings over any given period. For a small miner, variance isn't a statistic — it's the difference between a predictable trickle of income and a lottery ticket that costs money every day. Pools are the standard answer to it.
How pools work
A mining pool is a coordinator. Thousands of miners point their hardware at the pool's server instead of mining independently. The pool assembles candidate blocks, distributes the work, and when any participant finds a valid block, the pool collects the reward and splits it among contributors in proportion to the work each did.
Your "work" is measured in shares: partial solutions that prove you were actually hashing but aren't quite good enough to be a block. Think of shares as lottery tickets with a smaller prize — the pool counts your tickets and pays you accordingly. The pool finds blocks regularly (because it aggregates huge hashrate), so your payouts arrive regularly too, in small amounts instead of rare jackpots.
Crucially, pooling doesn't change your expected earnings — over a long enough period, you'd earn the same solo. It changes the shape of earnings: steady small payments instead of rare large ones. For anyone paying a monthly power bill, that shape matters enormously.
Fee structures, in general terms
Pools aren't charities; they take a cut. The common structures:
Percentage fee on rewards. Most pools take a small percentage of each payout — typically in the low single digits. A 2% fee means you keep 98% of what your hashrate earned. This is the number to compare first when choosing between pools.
PPS vs PPLNS. These are the two classic payout schemes, and the names describe who bears the pool's luck risk. Under PPS (pay per share), the pool pays you a fixed amount per share regardless of whether the pool actually found blocks — the pool absorbs the variance, and charges a higher fee for the privilege. Under PPLNS (pay per last N shares), you're paid from actual blocks the pool finds, so your payouts wiggle with the pool's luck — but the fee is lower. PPS is steadier and pricier; PPLNS is cheaper and lumpier. Neither is universally better; it's a trade between predictability and cost.
Payout thresholds and transaction fees. Pools usually don't pay out dust — there's a minimum balance before a payout triggers. Small miners should check this: if the threshold would take you months to reach, your earnings are effectively locked up. Also check whether the pool passes on the network transaction fee for the payout itself, which can nibble small balances.
What fees don't cover. A low fee doesn't help if the pool is unreliable, has high rejected-share rates, or pays out in a way that's awkward for you. Reputation and uptime matter as much as the percentage.
Solo mining: when does it make sense?
Solo mining means pointing your hardware at the network directly and keeping the whole block reward when — if — you find one. No fees, no coordinator, no one to trust. It's the purest form of mining, and for almost everyone, it's a bad idea.
The math is unforgiving. Unless your hashrate is a meaningful fraction of the network — which in 2026 means serious industrial capacity on major coins — solo mining is buying a very expensive lottery ticket. You keep 100% of the reward, but your expected time to any reward can exceed the useful life of your hardware.
There are narrow exceptions. On very small, new networks with low total hashrate, a modest rig can be a real fraction of the network, and solo mining (or a small pool) is reasonable. Some people solo-mine as a lottery hobby with hardware they'd own anyway, treating the electricity as the ticket price. That's a coherent choice as long as it's framed honestly: it's gambling, not investing.
Choosing a pool, practically
If you mine, you'll almost certainly join a pool. Compare on: fee percentage and payout scheme (PPS vs PPLNS); payout threshold relative to your hashrate; the pool's size and uptime history; and how payouts are delivered (which coin, which network, who pays the transfer fee). Avoid putting all your trust in one small opaque pool, and be wary of any pool promising returns above what the math supports — the math is public, and nobody beats it by being nice.
One more consideration: decentralization. If a single pool ever controlled a majority of a network's hashrate, it could theoretically attack the chain. Miners who care about the network's health spread across pools. It's enlightened self-interest — a compromised network's coins aren't worth much.
The bottom line
Pool mining trades a small fee for predictable payouts; solo mining keeps the whole reward but subjects you to brutal variance. For small miners, pools aren't really optional — they're what make mining income-shaped instead of lottery-shaped. Just remember that smoothing the payouts doesn't change the underlying economics: if the electricity math doesn't work, it doesn't work in a pool either.