What is PPLNS in Monero mining?

PPLNS stands for Pay Per Last N Shares. In a Monero mining pool, it means you earn a portion of a block’s reward based on how much accepted mining work you contributed during a recent window. You do not receive a fixed payment for every piece of work, so your earnings depend partly on the pool’s luck.

What “shares” and “last N” mean

A mining pool combines your computer’s mining effort with that of other miners. When the pool finds a valid Monero block, it receives a reward to divide among eligible participants.

Your computer submits shares: pieces of work that prove it is mining. A share usually does not find a block itself. It gives the pool a way to measure your contribution.

The “N” sets the size of the recent work window used to split a reward. Under a typical PPLNS system:

• The pool finds a block.
• It looks back over the last N qualifying shares.
• It calculates your portion of the work in that window.
• It credits your portion of the reward, after any applicable pool fee.

Shares can have different difficulty levels, meaning some represent more work than others. Pools generally account for that difference rather than simply counting submissions. Check your pool’s rules, because window sizes and implementation details vary.

How your payout is calculated

Imagine a pool finds a block and your accepted work represents 1% of its PPLNS window. You would receive roughly 1% of the reward being distributed, before accounting for the pool’s specific fees and rules.

Monero’s base reward is currently 0.6 XMR per block under tail emission, its ongoing issuance of new coins. Blocks can also include transaction fees. Using only the base reward for this illustration, 1% would be 0.006 XMR before pool fees.

That is an example of dividing one reward—not an earnings forecast.

If the pool finds several blocks while your shares remain in the window, those shares may count toward several rewards. If it finds no blocks before your shares leave the window, those shares may earn nothing.

Why starting and stopping matters

When you first join, you have little or no work in the recent window. Your eligible contribution builds as you submit shares. This is sometimes called the ramp-up period.

When you stop mining, your earlier shares may remain eligible until newer work pushes them out. You can therefore receive credit after disconnecting, but not indefinitely.

For browser mining, this matters if you frequently close the page or your device pauses background tabs. Short sessions can produce uneven results, especially in a pool that finds blocks infrequently.

PPLNS discourages pool hopping, which means switching pools to exploit payout timing. However, it does not automatically confiscate your earnings when you disconnect.

What to check before joining

Look beyond the advertised fee. Check:

• Window rules: How much recent work counts?
• Block history: Does the pool find blocks regularly or with long gaps?
• Payout threshold: How much must you accumulate before coins are sent?
• Rejected shares: Is some of your submitted work not being accepted?

Reward credit and wallet payment are separate steps. Newly mined Monero stays locked for 60 blocks, and pools have their own payment schedules.

The bottom line

PPLNS pays you for your share of recent pool work when the pool finds blocks. It suits steady participation, but rewards fluctuate. Understand the window, fees, and withdrawal rules before treating a pool balance as spendable income.