Stock Bills are at the heart of progression in Arknights: Enfield, and getting a handle on them early can save you a lot of frustration later. If you spend them carelessly or don’t invest them properly at the start, it’s very easy to hit the endgame and realize you’re completely broke on Stock Bills; bringing your farming, upgrades, and overall progress to a crawl.
Almost everything important in the game uses Stock Bills. You’ll need them for gacha tickets, character upgrades, weapon improvements, base customization, and most importantly, the two core endgame systems: Essences and Golden Gear. This guide walks through every reliable way to earn Stock Bills, explains when you should be spending them, and lays out the right priorities for each stage of the game.
Early on, Stock Bills shouldn’t be spent on quick upgrades or convenience items. Instead, your focus should be on putting them into systems that generate more Stock Bills. Doing this early creates a snowball effect that eventually makes money problems disappear almost entirely.
Story progression plays a huge role here. Advancing the main story unlocks new regions, factories, Deposit Zones, regional shops, and better tech. In the early game, pushing the story forward should almost always be your top priority.
Factories
Factories unlock early and provide a steady, if not amazing, source of Stock Bills.
How Factories Help
- You can craft consumables like potions and batteries.
- These items can be sold to secondary factories for Stock Bills.
- As you unlock more regions, additional factories become available and are handled by NPCs.
Factories won’t carry you through the endgame, but they’re easy to set up and work well as an early income source.
Mining and Processing Resources
As you progress, you’ll unlock access to several minerals:
- Originium (brown)
- Amethyst (purple)
- Ferrium (blue, unlocked later)
At first, mining is manual, but before long you’ll unlock automated mining facilities that gather resources and send them straight to your base.
You’ll also gain access to processing machines that refine raw Originium into Originium Crust. This refined resource:
- Is used in several future systems
- Can be sold to secondary factories for Stock Bills
The tutorial only has you build one Originium Crust production line, but it’s a good idea to build multiple early on. Even though each unit only sells for 1 Stock Bill, it helps establish a steady income.
Later in the game, switching to mass-producing potions becomes much more efficient. Potions sell for a high amount of Stock Bills and are still useful in combat, making them a great long-term factory product.
Deposit Zones
Once you start earning Stock Bills consistently, Deposit Zones should become your top investment priority.
What Deposit Zones Do
There are four Deposit Zones in total:
- The first appears in the Originium Science Park
- Each Deposit Zone has a delivery terminal that can be upgraded up to Level 4
Every day, each Deposit Zone offers one delivery mission:
- Pick up a package
- Deliver it to a marked location
- Get Stock Bills as a reward
The higher the terminal level, the more Stock Bills you earn, so upgrading these early is extremely important.
Posting Quests
You don’t even need to run these deliveries yourself:
- You can post the delivery for another player
- You still get 100% of the Stock Bills
- The helper also gets 100%
On top of that, you can complete up to three delivery missions for other players per day.
Once all maps are unlocked, this gives you:
- 4 daily deliveries from your own Deposit Zones
- Up to 3 more deliveries from other players
This easily makes Deposit Zones the best Stock Bill farming method in the entire game.
Just keep in mind that you can’t complete deliveries in areas you haven’t unlocked yet, which is another reason story progression matters so much.
Stock Redistribution Terminals
When to Spend Here
Early on, it’s better to hold off on buying items from Rabbit Shops. Focus on income systems first. Once your Stock Bill flow is stable, these shops become incredibly powerful.
Elastic Goods and Price Fluctuations
Rabbit Shops sell Elastic Goods, which change price every day:
- Red downward arrow means the item is discounted
- Green upward arrow means it’s more expensive than usual
Prices also differ between player worlds, which opens the door for trading and profit.
How to Make Money
- Buy Elastic Goods that are discounted in your world.
- Visit a friend’s world.
- Sell those same items where the price is higher.
- Keep the difference as Stock Bills.
There’s a daily purchase limit, but doing this every day still brings in a large amount of Stock Bills. Because of this, it’s a good idea to add as many friends as possible—even random players—to increase price variety.
Upgrading Rabbit Shops is also important, since higher levels unlock more Elastic Goods and increase your profit potential.
Ship Credits and Helping Friends
Ship Credits are a separate currency shown as white coins, but they support your overall economy in useful ways.
Daily Ship Credits
- Visit the Acquisition Center each day to get 800 Ship Credits
- These can be exchanged for character upgrade materials
Supporting Friend Ships
When you visit a friend’s ship:
- You can support up to 5 ship rooms per day
- Each support gives 20 Ship Credits
- That’s 100 extra Ship Credits daily
Supporting rooms boosts your friend’s production, and when others visit your ship, they’ll usually support your rooms too. It’s a simple system that benefits everyone.
Owl Stations
Owl Stations appear on maps and provide materials used to upgrade ship rooms.
- Early upgrades are cheap and worth grabbing
- Later upgrades cost Stock Bills and can wait
- Visit them daily after completing activities to collect materials
Regional Progression and Bonuses
Using systems like factories, Deposit Zones, Rabbit Shops, and Owl Stations earns regional experience.
As regions level up, you unlock:
- Better factory output
- Expanded shop inventories
- Gacha tickets and character upgrade materials
Main Regions
- Valley IV (starting region)
- Wuling Region
Both regions include all core systems, but Wuling has one extra mechanic that’s especially important.
Environmental Monitoring (Wuling Only)
Environmental Monitoring unlocks through the Wuling main story and should be treated as a high priority.
How It Works
- Starts at Level 1, upgradeable to Level 2
- Gives weekly photo-based objectives
- Each quest rewards 250,000 Stock Bills
At Level 2:
- You unlock 3 weekly quests
- That’s 750,000 Stock Bills per week
This huge payout lets you quickly upgrade:
- Wuling Deposit Zones
- Wuling Rabbit Shops
- Other regional systems
Even though it’s weekly, Environmental Monitoring is one of the strongest Stock Bill income sources in the game.
What to Spend On in the Endgame
Once Stock Bills are no longer an issue, it’s time to invest in power.
Golden Gear
- Crafting Golden Gear requires Wuling Stock Bills
- Upgrading often consumes other Golden Gear
- Extra materials must be bought from Wuling Rabbit Shops
- These materials refresh weekly and are expensive
Golden Gear is a core endgame system and requires a large Stock Bill reserve.
Essences
Essences are socketed into weapons for extra power:
- Farming is very RNG-heavy
- Upgrading requires consuming other Essences
- Rabbit Shops sell special tickets that reduce RNG
- These tickets are costly, but absolutely worth it
Other Helpful Purchases
- One-time gacha tickets
- Character upgrade materials
- Weapons with permanent availability
- Chest and Ori locator items
- Operator gifts for trust bonuses
- Food items (potentially more useful later)
- Base decorations
Final Thoughts
Stock Bills affect nearly every part of Arknights: Enfield, from early progression to deep endgame optimization. Managing them well—especially early—makes the entire experience smoother.
Build your income first, let your economy snowball, and only then start spending freely. Do that, and Stock Bills will never slow you down.
Videogames.
Gym.
Sneakers.
Manga.
My dog.
In that order.
