Mining income is almost impossible to predict - it depends on too many variables: cryptocurrency price, block reward, block time, network hashrate (capacity), its complexity, electricity cost, cost and capacity of mining equipment, farm maintenance costs, etc. The cheaper the electricity, the higher the profit, writes RBC Crypto. The cost of electricity depends on the region and equipment. For example, in Russia - from 1 to 8 rubles per 1 kWh ($ 0.01–0.1), on average 3.5 rubles / kWh, in the world - from $ 0.02 to $ 0.30. The average farm for 8 graphics cards costs about $ 100 per month. In addition to the electricity bill, large farms also require setup, rental, personnel, cooling and maintenance costs. According to BitCluster's calculations, electricity accounts for at least 85% of all miner's expenses, maintenance, depreciation, rent, etc. - 15%. At the same time, economies of scale work - per 100 devices and per 1,000 comparable security and rental costs. For example, according to BitCluster's calculations, renting, guarding and maintaining a farm with 3 containers for 192 devices each will cost about 320,000 rubles. The cost of a farm, twice as much, may remain the same or slightly exceed 400,000 rubles. You can calculate the profitability of a particular farm using special calculators. For example, WhatToMine, NiceHash, ASIC Trade, CryptoCompare. For the calculation, you must indicate the equipment, its cost and the price of electricity. Calculator data can vary by 30-40%, often the profitability is higher than the actual one. Today it is cheaper to build a farm than in 2017-2018. At that time, video cards were in short supply and sold at inflated prices. Today the excitement around them has passed. Building a farm is no longer a problem. But will it be profitable? How BTC mining changed after halving On May 11, a planned halving took place in the bitcoin network - the reward for the mined block was halved, and new coins began to appear twice as slow. Halving takes place every four years. After the previous halvings of 2012 and 2016, bitcoin grew 120 and 130 times, respectively, during the year. This time, some analysts also predicted a sharp rise in the price of military-technical cooperation. For example, analysts at Canaccord Genuity hoped that bitcoin would rise to $ 20,000 after halving, Pantera Capital CEO Dan Morehead expected $ 42,000, Morgan Creek Digital founder Anthony Pompliano - $ 100,000, and anonymous Twitter analyst PlanB - up to $ 425,000. However, panic intervened in the plans. market due to the coronavirus - prices collapsed in March. The recovery was very fast - it helped the miners pay the costs and not work in the red, but the "tuzemun" did not happen. After the halving, the MTC rate continued to rise, which provided a profit even for small miners with outdated equipment. The fall of the ruble played into the hands of Russian industrial mining - they incur expenses in rubles, and sell cryptocurrency for dollars. As a result, according to Dmitry Shuvaev, director of development at BitCluster, the drop in revenue was no more than 10-15% and did not last long. The MTC rate reacted poorly to halving - since May it has grown by 25%. Hashrate behaved differently. Immediately after the halving, it fell by 25% - some of the miners turned off their equipment due to a decrease in profitability. When VTS began to rise in price, they began to connect back and the hash rate began to grow. From the end of May to September, it grew from 90 to 125 EH / s. The complexity of the network also increased: from 16.1 T in May to 17.55 T. The decrease in the block reward was partially offset by an increase in commissions: from $ 0.5 in April to $ 2.5— $ 6 in the summer.