How much would I need to invest to earn $100 a month mining Monero?
There is no fixed investment that will reliably earn you $100 a month mining Monero. If you mean $100 in profit after electricity, you could need several thousand dollars in hardware—or mining may not be profitable at your electricity rate, no matter how many computers you buy.
First, decide what your $100 target includes
Revenue is the money your mined coins are worth before expenses. Profit is what remains after you pay those expenses.
For a useful investment estimate, aim for $100 a month after:
- Electricity for the computers and any extra cooling.
- Mining pool fees. A pool combines miners’ work and shares rewards.
- Any service fees or payout deductions.
- An allowance for equipment wearing out or losing value.
Getting $100 worth of XMR, Monero’s currency, into your wallet does not mean you made $100. And if you keep the coins instead of selling them, their dollar value can change before you spend them.
Measure what one computer can actually earn
Before buying equipment, test a computer you already own and are allowed to use. Monero uses RandomX, a mining method designed to favor CPUs—the main processors in computers.
Measure two things:
- Hashrate: how many mining calculations your computer performs each second.
- Power at the wall: the electricity the whole computer uses, ideally measured with a plug-in power meter.
Enter those figures and your electricity price into a live Monero mining calculator. Check whether its result already subtracts electricity and pool fees so you do not subtract them twice.
For browser mining, use your actual browser performance and payout terms, not benchmarks from dedicated mining software. Browser restrictions and service overhead can make those benchmarks a poor guide. Also verify whether the service mines Monero directly or does other work and pays you in XMR.
Turn that result into an investment estimate
Here is a made-up example to show the calculation, not a prediction of current earnings.
Suppose one complete computer:
- Costs $600 to buy.
- Earns $30 a month before costs.
- Uses 100 watts continuously.
- Pays $1 a month in pool or service fees.
At $0.15 per kilowatt-hour, its monthly electricity bill would be:
0.1 kilowatts × 24 hours × 30 days × $0.15 = $10.80
That leaves $18.20 a month, before cooling, repairs, taxes, or equipment depreciation.
You would need six computers to exceed $100 a month under those assumptions:
- Hardware investment: $3,600.
- Combined monthly operating profit: $109.20.
- Time to recover the hardware cost: about 33 months, if everything stayed unchanged.
Those figures will not stay unchanged. XMR’s price and mining competition can rise or fall. If each computer loses money after electricity, buying more only increases the loss.
Check the risk before spending
Include complete-system costs, not just processor prices. You may also need memory, storage, power supplies, and cooling.
Be especially cautious about browser-mining sites or “mining investment” plans promising a guaranteed $100 monthly return. Test withdrawals before committing money, and never pay an unexpected “unlock fee” to release supposed earnings.
The bottom line
Calculate $100 ÷ measured monthly profit per computer, round up, then multiply by the complete computer cost. Test existing hardware first: a small real payout and a measured electricity bill are much better buying guides than an advertised earnings figure.
