A lot of Fallout 4 players treat companions like temporary followers. You bring Piper along for a while, maybe swap to Deacon for a stealth run, then switch to Danse for Brotherhood quests and move on.
But there is one thing many players either never realise or never fully trust:
Companion perks are permanent once you unlock them.
That means some of the best bonuses in Fallout 4 are effectively free. You do not need to spend perk points on them, and you do not lose them when you dismiss the companion who gave them to you.
If you have ever wondered how companion perks really work, how affinity unlocks them, and which ones are actually worth chasing, this guide breaks it all down.
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🤝 What Are Companion Perks in Fallout 4?
Companion perks are special bonuses tied to specific companions in Fallout 4.
Unlike normal perks from the perk chart, these do not cost perk points. Instead, you unlock them by building enough affinity with a companion. Once you reach their maximum affinity and complete any related requirements, that companion gives your character a unique perk.
That means companion perks are really a form of relationship-based progression. They reward you for travelling with companions, making choices they approve of, and sticking with them long enough to earn their trust.
This is important because many players think of companions as just backup in combat. In reality, they can also become a long-term part of your build.
📈 How Companion Affinity Works
Affinity is basically Fallout 4’s approval system.
Each companion reacts differently to your actions, dialogue choices, and playstyle. Some like generosity and helping people. Others prefer stealth, pragmatism, hacking, or more ruthless decisions.
Because of that, the easiest way to unlock companion perks is not random grinding. It is usually much smarter to pair the right companion with the kind of character you are already playing.
For example:
- Deacon fits naturally with stealth-focused characters
- Danse fits well with Brotherhood-aligned playthroughs
- Piper works well for generally helpful and exploration-heavy runs
The more your actions match the companion’s personality, the easier it is to raise affinity without forcing it.
One mistake many players make is rotating companions too often. If your goal is to unlock a specific perk, it is usually better to commit to one companion long enough to finish the job.
❓ Are Companion Perks Permanent?
Yes — and this is the big myth-busting point.
Companion perks stay permanently once unlocked.
You do not lose them when you dismiss the companion. You do not lose them when you switch to another follower. And you do not need that companion to remain active for the perk to stay on your character.
That is what makes them so strong.
Once earned, they become a permanent part of your build for the rest of the playthrough.
⚠️ Permanent Does Not Always Mean Always Active
This is where some confusion comes in.
The perk itself is permanent, but the effect may still depend on the situation.
Some companion perks are broad and consistently useful. Others only activate under certain conditions.
For example:
- Cait’s perk only matters when your health is low
- Hancock’s perk only matters when you are highly irradiated
- Preston’s perk only works when you are facing multiple enemies
So the best way to explain it is this:
The perk is permanent. The effect may be conditional.
That distinction matters when deciding which perks are actually worth prioritising for your build.
🧠 Common Myths About Companion Perks
❌ Myth 1: You lose the perk when you dismiss the companion
False. Once unlocked, the perk stays with your character.
❌ Myth 2: The companion must remain active for the perk to work
Also false. You only need the companion to unlock the perk, not to keep it.
❌ Myth 3: You need to romance the companion
No. Romance is separate. You can unlock the perk without romancing the companion.
❌ Myth 4: Every companion uses the same system
Not true. Dogmeat works differently, and Ada does not use the normal affinity perk system in the same way as standard companions.
❌ Myth 5: All companion perks are equally worth getting
Definitely not. Some perks are broadly useful across many builds, while others are highly niche.
🏆 Every Main Companion Perk Explained
Now let’s go through the main companion perks and look at what they actually do.
📰 Piper — Gift of Gab
Piper’s perk, Gift of Gab, doubles the XP you get from successful speech checks and discovering new locations.
This is one of the best practical perks for early and mid-game play because it supports levelling and exploration. It is not flashy, but it gives consistent value over time.
Best for: general playthroughs, explorers, and players still levelling up.
🥷 Deacon — Cloak & Dagger
Deacon’s perk, Cloak & Dagger, increases sneak attack damage and extends Stealth Boy duration.
If you are running a stealth build, this is one of the best companion perks in the game. It directly supports ambush play, stealth rifles, and suppressed weapons.
Best for: stealth characters and sneak attack builds.
🎯 MacCready — Killshot
MacCready’s perk, Killshot, increases your chance to hit an enemy’s head in VATS.
For VATS players, this is one of the strongest companion perks available. If your build revolves around precision shooting and headshots, this bonus is incredibly useful.
Best for: VATS gun builds and precision shooters.
⚔️ Danse — Know Your Enemy
Danse gives you Know Your Enemy, which increases your damage against feral ghouls, super mutants, and synths.
Those are major enemy types throughout Fallout 4, which makes this perk more broadly useful than it may first appear.
Best for: players who want strong general combat value.
🛡️ Preston — United We Stand
Preston’s perk, United We Stand, increases both your damage and Damage Resistance when you are facing three or more enemies.
At first glance, some players underestimate this perk. In practice, though, Fallout 4 throws groups at you all the time. Raiders, ghouls, Gunners, synths, and settlement attacks regularly trigger the condition.
Best for: players who get into lots of group fights.
🩺 Curie — Combat Medic
Curie gives you Combat Medic, which heals you automatically when your health drops dangerously low.
This is basically a panic-button safety net. It will not help in every fight, but when it triggers at the right moment, it can save your life.
Best for: survival-minded players and anyone who wants extra protection in tough fights.
🔋 Cait — Trigger Rush
Cait’s perk, Trigger Rush, speeds up Action Point regeneration when your health drops below a certain threshold.
This can be useful for aggressive VATS builds or riskier low-health playstyles, but it is definitely more niche than the top-tier options.
Best for: risky VATS builds and players comfortable fighting on low health.
☢️ Hancock — Isodoped
Hancock’s perk, Isodoped, fills your critical meter faster when you have high radiation.
This is clearly aimed at characters built around radiation-heavy play. If that is not your playstyle, this perk will not do much for you.
Best for: radiation-focused builds.
💻 Nick Valentine — Close to Metal
Nick’s perk, Close to Metal, gives you an extra password attempt while hacking and reduces lockout time.
This is more of a quality-of-life perk than a combat bonus. It is useful, but not usually something most players should prioritise.
Best for: players who want smoother terminal hacking.
🔨 Strong — Berserk
Strong’s perk, Berserk, increases melee damage when your health drops low.
This is clearly built for aggressive melee characters. For gun builds or cautious playstyles, it is much harder to justify.
Best for: melee builds willing to fight at low health.
🤖 Codsworth — Robot Sympathy
Codsworth gives you Robot Sympathy, which provides extra Damage Resistance against robot energy attacks.
It is a real bonus, but it is also fairly modest compared to some of the more impactful perks on this list.
Best for: players who want a small defensive bonus against robots.
⚡ X6-88 — Shield Harmonics
X6-88’s perk, Shield Harmonics, grants a flat boost to Energy Resistance.
It is simple, reliable, and decent — but not especially exciting. It is one of those perks that is nice to have, but rarely something you would chase first.
Best for: players who want a straightforward defensive bonus.
🥇 Which Companion Perks Are Actually Worth Prioritising?
If you are looking at practical value for most Fallout 4 builds, the standouts are:
- MacCready
- Danse
- Deacon
- Preston
- Piper
- Curie
These perks offer the most broadly useful bonuses, whether that means stronger VATS headshots, better stealth, extra damage against common enemies, more XP, or an emergency heal.
Below that, you have the more specialised perks like:
- Cait
- Hancock
- Strong
- Nick Valentine
- Codsworth
- X6-88
These are not necessarily bad perks. They are just much more dependent on your build and how you play.
The real lesson here is simple:
The best companion perk is not the one with the coolest name. It is the one that supports the way you already play Fallout 4.
🚀 Best Way to Unlock Companion Perks Efficiently
If you want companion perks without wasting time, here are the best general rules:
- Pick a companion that fits your build
- Stick with them long enough to finish the job
- Make choices they naturally approve of
- Do not constantly rotate companions
- Be aware that some companions have extra quest-related requirements
For example:
- Use Deacon for stealth characters
- Use MacCready for VATS and precision builds
- Use Danse or Preston for general combat power
- Use Piper if you want overall progression value
If a perk feels like it is taking too long to unlock, the issue may not be the affinity system itself. Sometimes you may need to progress the right quest or story trigger as well.
✅ Final Thoughts
Companion perks in Fallout 4 are one of the easiest sources of long-term power in the game.
They are free, they are permanent once unlocked, and they can add meaningful bonuses to your build without costing a single perk point.
The biggest mistake players make is thinking of companions as temporary followers instead of long-term progression tools. Once you understand how affinity works and which perks actually fit your character, companions become much more valuable than they first appear.
🎮 Explore More Fallout (Affiliate Links)
If you are planning a fresh Fallout 4 run, I recommend checking out Fallout 4 on GOG.
That is the version I personally recommend if you want the cleanest path into Fallout London, because the GOG setup makes the process much easier, especially with the Fallout: London One-Click Edition. It is also a solid choice if you want a cleaner and more stable Fallout 4 setup for modding without being pushed toward the newer update path.
And honestly, Fallout London is well worth a look if you want a fresh Fallout experience. It gives you a completely different setting, a huge new world to explore, new factions, new weapons, and that rare feeling of discovering a brand-new wasteland again. I have also already covered how to install the Fallout London One-Click Edition on GOG, so be sure to check out that guide as well if you want the easiest way to get started.
👉 Fallout 4 / Fallout London
- Fallout 4 on GOG
- Fallout: London
- How to Install Fallout London One-Click Edition on GOG
If Fallout 4 is your first game in the series, I also highly recommend checking out Fallout 3 and Fallout: New Vegas.
You can also play both together using Tale of Two Wastelands, which combines Fallout 3 and New Vegas into one seamless experience using the same character.
👉 Fallout 3 / New Vegas / Tale of Two Wastelands
- Fallout 3 GOTY — GOG option / Humble Steam option
- Fallout: New Vegas Ultimate — GOG option / Humble Steam option
- Tale of Two Wastelands Mod
⚠️ Important: If you want to use Tale of Two Wastelands, make sure you choose the Steam version of Fallout 3 if using the Humble link, because the Windows Store version is not supported.
💬 What Do You Think?
Which companion perk do you think is the best in Fallout 4?
And did you already know that companion perks stay active even after you dismiss the companion?
Let me know in the comments.