Eridium makes its return in Borderlands 4 as one of the most valuable resources you’ll need, especially once you step into end-game activities. While you’ll naturally come across it during the story, knowing how to farm and where to spend it will save you hours of grind later on. This guide breaks down the best ways to collect Eridium and explains the different systems that require it.
How to Get Eridium in Borderlands 4
Unlike cash or standard loot, Eridium is tied to specific activities in Borderlands 4. Here are the most reliable methods to keep your stash growing:
1. Contracts
Contracts are optional missions you’ll find on boards in Safehouses. They become available as soon as you unlock your first Safehouse, early in the campaign. Completing contracts rewards you with XP, loot, and a steady stream of Eridium. Special contracts with purple markers can yield larger payouts, making them worth prioritizing.
2. Challenges
Inside the Missions menu, switch over to the Challenges tab. These are bite-sized tasks ranging from weapon kills to resource collection. They refresh regularly and offer Eridium alongside XP and cash. Since many challenges align with normal gameplay actions, they’re one of the most efficient ways to farm Eridium while progressing naturally.
See also: Top 10 Legendary Shields in Borderlands 4 (Farming Guide)
3. Campaign Missions and Side Quests
Story progression also hands out Eridium. Main missions typically give larger amounts, while side quests are quicker to complete and provide smaller but useful boosts. If you don’t want to rush the main campaign, weaving in side quests will balance your loot and Eridium gains.
4. Replayable Missions
From the Missions menu, you can revisit certain story missions. These take longer than contracts or challenges but can be replayed as often as you like for extra loot, XP, and Eridium. They’re particularly useful if you want to mix farming with reliving major story moments.
How to Use Eridium in Borderlands 4
Collecting Eridium is only half the journey. Once you hit end-game content, you’ll find several systems that require large amounts of it:
Respec Your Specialization
Borderlands 4 introduces Specialization trees alongside traditional skill builds. To reset these, you’ll need 5,000 Eridium. Respeccing lets you experiment with different setups without being locked into your initial choices.
Moxxi’s Big Encore Machine
After finishing the main story, you’ll gain access to Moxxi’s Big Encore. This machine allows you to replay boss fights for a fee that includes Eridium. The catch? Each replay comes with boosted drop rates, making this the best way to target-farm specific legendary gear.
Firmware Transfer
With Firmware Transfer, you can move a special weapon effect from one gun to another. The donor weapon is destroyed in the process, so choose carefully. This system allows you to create customized weapons with stacked effects, a cornerstone of late-game builds.
Quick Tips for Borderlands 4 Eridium
- Balance activities: Rotate between contracts, challenges, and replayable missions to keep farming fresh.
- Stockpile early: Even if you can’t use Eridium right away, build up reserves during the campaign to avoid grinding later.
- Target challenges: Since many challenges align with natural gameplay, always check the tab before diving into long sessions.
Eridium is more than just another collectible—it’s the fuel for Borderlands 4’s most exciting systems. Whether you’re respeccing your build, chasing legendary loot, or experimenting with weapon effects, having a healthy supply of this rare resource makes the end-game far more rewarding. Start farming early, and you’ll thank yourself later when the true grind begins. Play Now!
