Explaining Bitcoin mining rewards to a spouse, business partner, or investor starts with separating three numbers: the BTC earned, its cash value, and the amount left after costs. A mining machine does not earn a fixed daily salary, and a pool account balance does not tell the whole financial story.

A simple explanation is: “Our machines contribute computing power to a mining pool. The pool credits us according to the work we contribute and its payment method. The bitcoin we earn has a changing cash value, and we still need to account for our costs.”

From there, explain where the rewards come from, how the pool calculates earnings, and why the numbers change.

Start With the Reward for One Bitcoin Block

A Bitcoin block’s total reward has two components: the block subsidy and the transaction fees paid by transactions included in that block. Only the subsidy is newly issued bitcoin; transaction fees come from existing BTC paid by transaction senders. The Bitcoin Developer Guide explains this distinction.

Following the fourth halving at block height 840,000 in April 2024, the subsidy fell from 6.25 BTC to 3.125 BTC per block. Halvings follow Bitcoin’s protocol rules, rather than a pool’s policy or a machine’s performance. Transaction fees vary from block to block.

For a partner, the key point is: “Bitcoin rewards successful block mining, rather than paying each machine a wage.” A single machine has a very low probability of finding a block over a typical monthly reporting period. Pooling computing power lets miners receive smaller, more frequent earnings, with the exact arrangement depending on the pool’s payment method.

What a Mining Pool Actually Measures

In pooled mining, a machine performs hashing work and submits results called shares. An accepted share is a submitted proof of work that meets the pool’s share target and validation requirements. The pool uses accepted shares to measure a miner’s contribution.

The pool’s share target is easier to meet than Bitcoin’s network target. Most shares therefore do not qualify as Bitcoin blocks. Occasionally, a result also meets the network target and can be used to submit a block candidate. Technically, an easier target is numerically higher and corresponds to lower difficulty. The Bitcoin mining guide describes this process.

A useful explanation is: “Shares are records of qualifying work, not pieces of bitcoin. The pool uses them to calculate our earnings under its payment rules.”

The Payment Method Determines How Earnings Are Calculated

Two common approaches are PPS (Pay Per Share) and PPLNS (Pay Per Last N Shares).

With PPS, a pool pays for accepted shares based on their expected reward value, whether or not the pool actually finds a block during that period. This reduces the miner’s exposure to short-term pool luck, but it does not make daily earnings fixed: difficulty and the amount of accepted work still matter.

With PPLNS, earnings depend on blocks the pool actually finds and the miner’s contribution within its defined share window. Results fluctuate with pool luck—whether the pool finds more or fewer blocks than statistically expected over a period.

ViaBTC’s default PPS+ method combines the two: the subsidy component uses PPS, while transaction-fee earnings use PPLNS. For a partner, that means one component is based on expected rewards for accepted work, while the other depends on actual pool-found blocks. See ViaBTC’s payment-method guide.

Under ViaBTC’s published calculation rules, the PPS+ subsidy component carries a 4% pool fee and is settled hourly. Its transaction-fee component carries a 2% fee and is calculated when a block reaches six confirmations, using the miner’s contribution over the last five difficulty rounds. Under PPLNS, a 2% fee applies to the subsidy and transaction fees together, using the same confirmation and contribution-window rules. These are pool settlement rules. Credits to a pool account should be distinguished from withdrawals to an external wallet. ViaBTC calculation rules.

When discussing fees, identify both the payment method and the reward component the fee applies to.

A Simple PPLNS Example

This hypothetical example illustrates PPLNS allocation for one block. It is not an income forecast or a calculation of PPS+ earnings.

Assume a pool finds a block with a 3.125 BTC subsidy and 0.250 BTC in transaction fees. The total block reward is:

3.125 BTC + 0.250 BTC = 3.375 BTC

If the miner’s allocation under the applicable PPLNS window is 1% before fees:

3.375 BTC × 1% = 0.03375 BTC

After a 2% pool fee:

0.03375 BTC × (1 − 0.02) = 0.033075 BTC

The transaction fees and 1% allocation are hypothetical. Actual earnings depend on the blocks found and the miner’s contribution within the pool’s allocation window.

The explanation for a partner is: “We receive the allocation calculated under the pool’s rules, less the applicable pool fee—not the entire block reward.”

Why an Estimate and Actual Earnings Differ

An estimate uses assumptions. Actual earnings reflect what happened during the reporting period. Differences can arise because:

• Network difficulty changes. Higher difficulty reduces the expected BTC earned from the same amount of hashing work, other factors being equal.
• Transaction fees vary. The fees included in actual blocks can differ from those assumed in an estimate.
• Pool luck varies. This affects PPLNS-linked earnings, including the transaction-fee component of PPS+.
• Actual mining activity differs. Downtime, connectivity problems, or rejected shares can reduce accepted work relative to the estimate.
• The payment methods differ. ViaBTC’s calculator estimates PPS+ earnings; comparing that estimate with PPLNS results introduces another difference.

ViaBTC describes its calculator output as a theoretical estimate, not a settlement record. BTC price affects the estimate’s fiat valuation; it does not directly increase BTC output. ViaBTC calculator explanation.

An estimate and an account credit can differ for ordinary reasons. Reviewing the assumptions helps explain the gap.

A Short Monthly Review Checklist

When reviewing mining results with a partner, ask:

• How much BTC was credited to the pool account during the period?
• Which payment method and component fee rates applied?
• How long were the machines operating?
• What electricity and hosting costs applied to the same period? Does hosting already include electricity?
• What BTC/USD price and valuation date are being used?

ViaBTC’s Profit Detail statistics use UTC+8. Align the reporting period when comparing those figures with other records. ViaBTC calculation rules.

Keep BTC credited, USD value, and earnings after the listed costs separate. Avoid subtracting electricity twice if it is included in hosting. If the calculation includes only selected operating costs, label it accordingly; a full net-profit calculation needs all applicable costs. Valuing BTC in dollars also does not mean that BTC has been sold for cash.

FAQ

What is the difference between a block reward and pool earnings?

A total block reward consists of the block subsidy plus transaction fees. Pool earnings are the BTC credited to a miner under the pool’s payment method after applicable pool fees. PPS pays for accepted shares based on expected rewards; PPLNS distributes rewards from blocks actually found.

Why doesn’t my ASIC earn a fixed amount of Bitcoin each day?

Earnings depend on accepted mining work, network difficulty, and the payment method. Transaction fees and, for PPLNS-linked components, pool luck also affect the result. Even if a machine runs continuously, its daily BTC earnings can change.

What is the difference between PPS+ and PPLNS?

At ViaBTC, PPS+ pays the subsidy component using PPS and the transaction-fee component using PPLNS. Under PPLNS, both components depend on actual pool-found blocks and the miner’s contribution within the allocation window. Their fee structures also differ.

Why can the mining calculator show a different number from actual earnings?

A calculator estimates earnings using inputs and assumptions. Actual difficulty, transaction fees, accepted work, and pool luck for PPLNS-linked components can differ. Also check that the calculator’s payment method matches the one used for mining.

Does a higher BTC price mean higher mining rewards?

A higher BTC price increases the USD value of a given amount of BTC. By itself, it does not increase the amount of BTC earned from mining. Review BTC earnings and their fiat value separately.