Skill farming works by taking advantage of the price difference between skill injectors and extractors. You max out your attributes, train the required 500k SP to extract, then sell the injectors. Rinse and repeat.

The following is boring math that shows how it roughly works out:

Prices based on Perimeter sell/buy split.

Extractor: 320M ISK
Injector: 760M ISK
Difference: 440M ISK

2700 SP / hour -> 1,944,000 SP / month = 3.888 extractions

440M * 3.888 = ~1.7B ISK * 0.95 (taxes) = ~1.6B ISK

From a glance, it looks like you'll earn 100M ISK per month for each character, but margins are thin enough so that even small PLEX price changes can quickly make your farms barely break even.​​​​​​ These losses are still vastly better than grinding your ISK for 500 PLEX, especially down the line when your farms are settled and training at max speed.

All that said, the main purpose of skill farming in this guide is not to get free ISK per month. The purpose of farms to keep your existing accounts PLEXed so you don't relapse into an alpha. For example:

The first character in Perimeter is the primary farm for this account, and he doubles for a market alt. If you want, you can give your skillfarms secondary roles to do other activities and make more ISK or even pay for your main's MPTC. More on this later. Because he's sustaining omega, the other two characters are also omega for free, especially:

The second account, which is the “main” I actually undock with and use omega-only ships. He doesn't have to get out of his Muninn, Jackdaw, or whatever. All without opening my wallet or endlessly grinding.

The second skill farm is optional, though it earns a bit more ISK because MPTC's are cheaper than 500 PLEX.

>5 million SP character with a bonus remap that never undocks and/or is very unlikely to die. How you reach 5 million will be different:

• You (optimally) already have a >5 million SP character doing something like indy, or you're an old alpha who's just reached the limit
• You are starting from a brand new character, in which case you must either:
  • Spend billions on injectors to bring it up to the minimum required to extract (very very expensive)
  • Play the long-con by pausing training on your main or use MPTC's (very expensive)
  • Play the longer-con by relapsing into an alpha and slowly train 5 million SP for “free” (very very long)

Cybernetics V to use the training implants. This will slow down training for your first 500k and make your first month a bit rough.

2 billion ISK per character, spent on:

• 2 +5 improved implants for both attributes
• Skill Extractor
• PLEX / MPTC if you have a second farm on that account
  • Optionally, you can buy a pack or spend $15 for the first month and never spend money on that account again, reducing your initial ISK requirement down to 1 billion per character

Optional, but you may want character tracking software, such as:

• EVEMon: The best option, maintained by Peter Han. EVEMon has a feature where it tracks how much SP you have by the minute, rather than the next time you update your queue. Really handy for knowing when exactly you should extract. You can also easily create and copy+paste skill plans.
• skillq.net: Maintained by Squizz. You can have it warn you when a queue has less than 24 hours remaining. Practically required for alphas even without following this guide.
• Spreadsheets: This is objectively the worst option because you have to do a lot of manual bullshit that others have already done for you (see above). That said, it's an option.

1. First and foremost, train Cybernetics V. You need this to plug in the required +5 improved implants.
2. Consider skill groups. Note that the primary and secondary attributes shown from the character sheet is a lie. For example:
   ALWAYS verify skill attributes from the info window and not the character sheet.
   1. Once you find a group of skills you want to train, buy their respective implants and remap your character. Max the primary attribute first then spend the rest on your secondary attribute. In the end, you will have 32 points for your primary and 26 for the secondary training 2700 SP/Hour. For example, say your first farm is your market alt. You would max Charisma, spend the rest on Memory, plug in those implants, and train things like Marketing, Procurement, and Visibility. Their usefulness is irrelevant- you're extracting them anyways.
3. Once the character hits 5.5 million, use your extractor then sell the injector. Buy another extractor for the next time.
4. Once you rack enough ISK, buy PLEX and MPTC's as needed.
5. Start over from step 3. Rince and repeat.

If you're starting from scratch, how you bring your characters up to 5 million SP isn't terribly important. All that matters is that it's reached in the first place. That said, training the Magic 14 + Cloaking + Clones + Interceptors isn't a bad start.

If you're an alpha and can't train some of the skills to level V, feel free to copy this skill plan: https://pastebin.com/s67imxML. Change the missile/ship skills in the end as you see fit. EVEMon emp file: https://drive.google.com/open?id=1n-bDce4RDEStkaL3ktF0J5SuPr2-X0QD

While normal assets in the delivery hangar cannot be accessed remotely, extractors can be. In fact- once used the resulting injector will be put in the regular item hangar. This means your market alt (which is a skill farm) can buy extractors from Perimeter, deliver them to your PI alt in Eso (which is also a skill farm), have them extract remotely, and contract them back.

This opens up a lot more options, namely:

Though utility alts are good to have even without making them skill farms, these can nonetheless be repurposed.

The best example are market alts which are typically already in Jita or Perimeter, stay docked 24/7, and have a plethora of skills you can juggle between, like Visibility and Procurement. Like I mentioned before: their usefulness is irrelevant. You're extracting them anyways.

Through remote extraction, you can also turn your indy alts in Eso into farms. Science skills can be used for invention, reaction and reprocessing skills overlap quite well, etc.

Note that if they aren't already trained, many utility roles will have skill requirements that are not aligned with your attributes as shown in the screenshot. This means that initial training will be slow which eats into your first few month's ISK. Planetology is different from Interplanetary Consolidation. Broker Relations has fucking Willpower as its primary. Just be mindful of what needs what.

When an account is in an alpha state, extractors will only work on omega level skills. This means if you go AFK and relapse, you won't be able to extract skills and make buying that PLEX a bit easier.

EVE-Mogul has a handy tool that tells you how much ISK you can make by skill farming, but you need to make an account to use it. Super gay, but just use a burner account and it should be fine.

While the main purpose of this guide isn't to gain passive ISK, you can still earn a meaningful amount per month if you min-max your orders and use all 3 toons on an account, as shown here:

Jesus Christ, 1.4 billion, right? Now you know why autists like me own 20 skillfarm accounts. This still means you have to do a shitton of micromanagement like contracting to every. Single. Character. And. Back. Honestly? Just stick with one account. You have more fun that way.

Note the options on the bottom. See how I'm getting extractors from 10 Packs and not just buy orders? It turns out 1120 PLEX (the price in the eden store for the pack) is cheaper than the prices on the market. Experiment with these a bit. Sometimes MPTC's will be cheaper, maybe you feel like selling to buy orders instead, etc.