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To calculate a Bitcoin mining contract’s real yield, estimate the BTC the contract should credit under its stated payout rules, subtract every contract and payout cost exactly once, and convert the remaining BTC to fiat only under a clearly stated price assumption. The result is an estimate, not a guaranteed return: delivery uptime, network difficulty, block rewards, transaction fees, pool rules and Bitcoin’s market price can all change.
What “real yield” means on a Bitcoin mining contract
A contract’s advertised output is not automatically your profit. A useful calculation separates four different quantities:
- Gross credited BTC: the amount attributable to your contracted hashrate before any deductions that the quote does not already include.
- Contract costs: hashrate charges, electricity charges and any other fees required to keep the service running.
- Net BTC: credited BTC after pool, withdrawal, network, account and currency-conversion charges that actually apply.
- Fiat result: the net BTC multiplied by a stated Bitcoin price, less costs paid in fiat.
Keep the BTC calculation and the fiat calculation separate. A contract can credit the same number of BTC while its dollar or euro value changes sharply. Conversely, a higher BTC estimate can still lose money if the contract’s fees are larger.
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A Bitcoin block reward has two components: the block subsidy and the transaction fees attached to transactions in that block. The Bitcoin Developer Guide describes the coinbase transaction as collecting “the block reward (comprised of a block subsidy and any transaction fees paid by transactions included in this block).” The subsidy changes according to Bitcoin’s issuance schedule, while transaction-fee income varies with demand for block space and transaction size.
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Most contract customers do not mine blocks alone. Their hashrate is assigned to a pool, which combines many miners’ work and distributes rewards according to its payout method. In broad terms, your share is based on the hashing work you contribute, but the exact credit depends on the pool’s accounting rules, the contract’s effective hashrate and the deductions written into the offer.
That is why a quoted “daily BTC” figure is not a guaranteed yield. It is an estimate based on assumptions about network conditions and the provider’s delivery. A historical-output figure is also backward-looking. Binance’s cloud-mining documentation explicitly says historical output is not an accurate prediction of future output and should not be used to estimate future awards.
Transcribe the contract before doing any arithmetic
Copy the offer into a worksheet before accepting the provider’s calculator. Create one row per contract and record the following items verbatim:
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- Purchased hashrate: amount and unit, such as TH/s.
- Operating period: the actual number of billable days, not merely a calendar label such as “30 days.”
- Start rule: whether the term begins at purchase, at payment, or when the computing power goes online.
- Hashrate fee: rate, unit, currency, billing interval and payment timing.
- Electricity fee: rate and formula, including whether it is paid upfront, daily or deducted from output.
- Delivery metric: how uptime or delivered hashrate is calculated, and what remedy applies when delivery is short.
- Payout method: FPPS, PPS, proportional or another method; identify whether transaction-fee income is included.
- Pool deduction: the percentage or fixed amount, and whether it is already netted from the displayed output.
- Minimum payout: threshold, schedule and whether unpaid balances roll over.
- Withdrawal and network charges: fixed or variable fees for sending BTC out of the account.
- Other account charges: conversion, maintenance or payment-processing fees.
- Cancellation and refund terms: conditions for early termination, non-delivery or a suspended service.
Terms differ materially between providers. For example, Binance defines duration from the time computing power goes online, separates hashrate and electricity fees, and describes a remedy when delivery falls below its stated threshold. Do not transfer that provider’s definitions to another contract.
Estimate the BTC the contract can credit
Use the contract’s calculator as an input, not a promise
Record the calculator’s date and every assumption it uses: network difficulty or hashrate, block subsidy, transaction-fee estimate, operating days and effective hashrate. If the calculator does not disclose those assumptions, mark the estimate as less auditable rather than treating the displayed number as certain.
A simplified share model is:
expected BTC before contract-specific deductions ≈ (your effective hashrate ÷ network hashrate) × expected network BTC rewards during the operating period
The effective hashrate is the amount actually delivered, not necessarily the amount printed on the order confirmation. Downtime, ramp-up delays, maintenance and under-delivery reduce it.
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Check what an FPPS quote includes
Under FPPS, a provider generally calculates an expected share of network rewards and may include an allocation for transaction fees. Verify whether the quoted BTC is:
- gross before the pool deduction;
- net of the pool deduction;
- based on both subsidy and transaction-fee components; or
- based only on a stated historical or modeled output.
A BitMine Immersion Technologies SEC filing illustrates one company’s FPPS accounting as a share of expected network rewards with fee treatment, less mining-pool fees. Its reported 0.3% pool-management fee for the year ending August 31, 2024 is a company-specific historical example, not a universal FPPS rate.
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Model more than one network case
At minimum, calculate a base case and a downside case. Change the assumptions that matter most to your contract: delivered hashrate, network difficulty, transaction-fee income and operating days. Do not insert a current network difficulty, hashprice or BTC/USD price unless you have a dated, authoritative figure for the exact calculation date; those values are volatile.
Subtract every fee exactly once
Hashrate charges
When the contract quotes a daily unit price, calculate:
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hashrate fees = rate per hashrate unit per day × purchased hashrate × billable days
Confirm whether “billable days” starts at purchase or at online delivery. A contract that starts billing before the machine is online has a different real cost from one that starts at activation.
Electricity charges
If electricity is also quoted per hashrate unit per day, use:
electricity fees = electricity rate × contract hashrate × billable days
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Pool, payout and account charges
Add a pool fee only when it is not already deducted from the quoted BTC. Then add any charges imposed by the specific account:
- withdrawal or Bitcoin network fees;
- minimum-balance or payout-processing fees;
- fiat conversion or payment-processing fees; and
- account or maintenance charges.
If the headline price includes electricity, do not add electricity again. If the output is already net of the pool fee, do not subtract that percentage a second time. Double-counting is one of the most common reasons a worksheet understates yield.
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Verify delivered hashrate and uptime
Compare the hashrate you paid for with the hashrate actually delivered over the full term. Binance defines total hashrate online rate as:
total hashrate online rate = (total hashrate delivered ÷ purchased hashrate) × mining duration
That provider describes a 95% minimum by the end of the subscription period under its stated terms. This is a provider-specific service level, not an industry-wide standard. Your calculation should use the remedy in the contract you are considering: replacement time, term extension, credit, refund or no remedy.
Do not multiply a daily estimate by the nominal term until you know when the term starts and how outages are treated. A 30-day contract with delayed activation, maintenance windows or a delivery credit may produce fewer operating hours than its marketing label suggests.
Convert the result to BTC and fiat separately
Use these two equations:
net BTC = credited BTC − BTC-denominated fees not already deducted
net fiat scenario = (net BTC × stated BTC price assumption) − total fiat costs
State the Bitcoin price, currency, timestamp and source used for the scenario. The price is an assumption, not part of the mining yield. If the contract charges in fiat and pays in BTC, preserve both figures so a reader can substitute a different price later.
A useful decision metric is the break-even Bitcoin price:
break-even BTC price = total fiat costs ÷ net BTC
This is meaningful only when net BTC is positive and every applicable cost is included. It answers, “At what BTC price would this modeled contract recover its costs?” It does not forecast where Bitcoin will trade.
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Worked example with hypothetical numbers
The following numbers are illustrative only; they are not a market quote or a prediction. Suppose a contract advertises 100 TH/s for 30 billable days. Assume its calculator estimates 0.00180 BTC before contract-specific deductions, the hashrate charge is $0.010 per TH/s per day, the electricity charge is $0.006 per TH/s per day, and a separate 1% pool deduction applies. Assume a $2 withdrawal charge and a hypothetical BTC price of $60,000.
- Hashrate fee: $0.010 × 100 × 30 = $30.
- Electricity fee: $0.006 × 100 × 30 = $18.
- Pool deduction: 1% of 0.00180 BTC = 0.000018 BTC, leaving 0.001782 BTC before the withdrawal charge.
- Net BTC: subtract any BTC-denominated withdrawal amount if the provider converts the $2 charge into BTC. If the $2 is paid separately in fiat, net BTC remains 0.001782 BTC.
- Fiat value at the stated scenario price: 0.001782 × $60,000 = $106.92.
- Net fiat scenario: $106.92 − $30 − $18 − $2 = $56.92.
- Break-even price: ($30 + $18 + $2) ÷ 0.001782 ≈ $28,058 per BTC.
If the displayed 0.00180 BTC was already net of the 1% pool fee, step 3 would be wrong and the pool fee must not be deducted again. If only 90 TH/s was delivered for part of the term, the BTC estimate must be reduced or the contract credit applied before the fiat calculation.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to compare two or more contracts
Normalize the offers before comparing them. Put the following fields in one table and use identical network-reward, difficulty, transaction-fee, BTC-price and uptime assumptions:
| Comparison field | What to record | Why it changes the result |
|---|---|---|
| Effective hashrate | Purchased amount and delivered amount | Gross BTC follows actual hashing work, not just the order size. |
| Operating time | Activation rule and billable days | Billing can begin before or after online delivery. |
| Hashrate fee | Unit, rate, currency and variability | A low headline price may exclude a separate daily charge. |
| Electricity fee | Formula, payment timing and change rights | Power costs can dominate a long contract. |
| Payout method | FPPS, PPS, proportional or other | Methods differ in treatment of subsidy and transaction fees. |
| Pool fee | Rate and whether output is already net | Prevents double-counting and makes BTC estimates comparable. |
| Threshold and withdrawals | Minimum payout and every withdrawal/network charge | Small contracts can accumulate balances or lose a larger percentage to fixed fees. |
| Delivery remedy | Uptime formula, target and compensation | A stated service level matters only if the contract provides a remedy. |
| Refund and counterparty terms | Cancellation, suspension and insolvency provisions | A modeled yield is irrelevant if access to the balance or service is interrupted. |
Do not compare a “yield percentage” when one provider reports gross BTC, another reports net BTC, and their electricity or uptime assumptions differ. Recalculate both as net BTC and net fiat under the same assumptions.
Why the estimate can change after purchase
Network difficulty and hashrate
Your share of network work changes as total network hashrate and difficulty change. A calculator based on conditions at purchase can overstate later output if competition rises.
Transaction-fee conditions
Transaction fees depend on demand for block space and transaction size. An FPPS estimate that includes a fee component can therefore move even when your contracted hashrate does not.
Bitcoin price
BTC yield and fiat return are different measurements. A contract may credit BTC while losing fiat value, or appreciate in fiat terms despite a lower BTC credit.
Miner efficiency and power economics
For a hosted or cloud arrangement, miner efficiency and electricity pricing are embedded in the provider’s charges. Changes in those inputs can lead to higher fees, lower uptime or revised terms where the contract permits adjustments.
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Payout thresholds, accounting windows, pool deductions and withdrawal rules can alter when and how much BTC reaches your wallet. Read the live terms attached to the exact product rather than relying on an educational guide or an older offer.
Common calculation mistakes and fixes
- Treating projected BTC as guaranteed: label it as an estimate and retain the assumptions and date.
- Using the nominal hashrate for the entire term: apply actual delivery and the contract’s uptime formula.
- Adding a pool fee twice: identify whether the quoted payout is gross or already net.
- Assuming electricity is included: locate the separate electricity line and its billing rule.
- Mixing BTC and fiat costs: keep BTC-denominated deductions in the BTC equation and fiat charges in the fiat equation.
- Ignoring minimum payouts: model whether the balance can be withdrawn before the contract ends.
- Using an undated BTC price: write down the exact timestamp and currency for every fiat scenario.
- Calling a provider’s service level universal: treat the 95% example as provider-specific and use your own contract’s remedy.
- Comparing contract lengths by calendar label: compare activation date, billable days and maintenance treatment.
Contracted hashrate versus owning an ASIC
Buying and operating an application-specific integrated-circuit miner changes the cost structure rather than removing the risks. An owner must account for hardware purchase and depreciation, electricity, cooling, space, networking, maintenance, pool fees and downtime. A contract bundles some of those operational responsibilities into its price but adds counterparty, delivery and withdrawal risk. The Bitcoin Developer Guide identifies ASIC hardware as the specialized equipment used for modern mining; it does not establish a particular model or a current profitability figure. Compare the two approaches using the same net-BTC, fee, uptime and BTC-price worksheet.
A repeatable worksheet
- Copy every price, unit, date and term from the contract.
- Determine when billing and mining actually begin.
- Record the provider’s payout method and whether transaction fees are included.
- Estimate gross BTC using the provider calculator and documented network assumptions.
- Replace nominal hashrate with an uptime-adjusted effective hashrate.
- Calculate hashrate and electricity charges from the contract’s own formulas.
- Subtract pool, withdrawal, network, conversion and account fees once.
- Report net BTC separately from any fiat scenario.
- Calculate a break-even BTC price when net BTC is positive.
- Re-run the worksheet for a downside delivery or network case before committing funds.
The final line should show the assumptions beside the result: operating dates, effective hashrate, payout method, fee treatment, BTC price and every included cost. That makes the calculation auditable and lets you update it when the provider posts a payout or the contract terms change.
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