Sanity is the one number in Phasmophobia that quietly decides whether your investigation stays controlled or spirals into a ghost hunt you weren't ready for. Every second you spend in the dark chips away at it, and once the team average drops low enough, the ghost starts pushing back harder. Understanding exactly how sanity drains, what restores it, and which ghost abilities target it directly is the difference between finishing a contract alive and watching the end screen from a body bag.
How does sanity work in Phasmophobia?
According to the Phasmophobia Wiki, every player starts each contract at 100% sanity. There are two readings that matter: your individual sanity and the average team sanity. The truck's sanity monitor displays both values, though the numbers shown fluctuate slightly from the real values. In a 3-player game, for example, the displayed average can swing by up to 6% in either direction from the actual figure. On Nightmare and Insanity difficulty, the monitor is damaged and shows nothing at all, so you're flying blind.
The ghost uses average team sanity, not individual readings, to decide when to ramp up activity. Ghost events, interactions, flickering lights, and hunts all become more frequent as that average falls. One important exception: the Banshee uses its specific target's individual sanity when deciding whether to initiate a hunt, while every other ghost sticks to the team average.
Dead players are removed from the average sanity calculation, but they still exist in the background. They can still lose sanity from other players dying (15% deduction) and from the Summoning Circle's candles (16% deduction per candle).
What drains sanity passively?
Passive drain runs constantly once you open an exit door and step inside. The key mechanic here is lighting: ceiling lights controlled by wall switches stop passive drain in most rooms. Lamps, televisions, and flashlights do not count. Holding a lit flashlight, standing in front of an active computer, or cranking up your monitor's brightness all make zero difference to sanity drain.
The drain rate scales with map size and difficulty. Here's the full breakdown from the wiki:
Those base values are then multiplied by difficulty:
- Amateur: 1x
- Intermediate: 1.5x
- Professional / Nightmare / Insanity: 2x
- Blood Moon weather: add 1 to the multiplier (so Professional with Blood Moon runs at 3x)
Playing solo halves the passive drain rate entirely, which gives you considerably more time to work before things get dangerous.
Large rooms like the hallways in Sunny Meadows Mental Institution are a special case. Even with all lights on, sanity drains at 80% of the normal rate because of unavoidable dark spots. A Firelight placed nearby reduces drain by a variable amount depending on its tier, even when the room lights are off.
During the Setup Phase, your sanity cannot drop below 50% regardless of the drain source. Use this window to place equipment without worrying about hitting dangerous sanity levels.
Which ghost abilities drain sanity directly?
Beyond passive drain, several ghosts have abilities that hit your sanity hard and fast. After testing these across multiple contracts, the ghost-specific drains are the ones that catch players off guard most often. Here's what the wiki documents:
- All ghosts: Colliding with the ghost or its smoke ball during a ghost event costs the target 10% sanity.
- Banshee: If it performs a singing event on its hunt target and they collide with it, that player loses 15% sanity instead of 10%.
- Oni: Any ghost event collision costs 20% sanity, double the standard rate.
- Jinn: Uses an ability that drains a nearby player by 25% sanity. This only activates when the breaker is turned on.
- Yurei: Closes a door in its room and drains all nearby players by 15%. Requires at least one open door in the room to trigger.
- Moroi: Cursing a player (triggered by a response on the parabolic microphone or Spirit Box) doubles that player's passive sanity drain rate. Lights and Firelights provide no protection against this curse.
- Phantom: Being within 10 metres of a manifested Phantom while in pseudo line-of-sight drains sanity at roughly 0.5%/s.
- Poltergeist: When it throws multiple objects with its ability, nearby players lose 2% sanity per object thrown.
- Player death: Every time a player dies, all players (including dead ones) lose 15% sanity immediately.
If you're hunting a Moroi, avoid using the Spirit Box or parabolic microphone unless absolutely necessary. Getting cursed doubles your passive drain and no light source will help you recover it passively.
How do cursed items affect sanity?
Cursed possessions are where sanity management gets genuinely punishing. Each one interacts with sanity differently, and using them carelessly will tank your team's average fast. According to the wiki:
- Sanity Pills: Restore between 0% and 100% of individual sanity depending on difficulty. The exact restoration scales with the difficulty setting.
- Haunted Mirror: Each use costs 20% sanity or 7.5% per second, whichever is higher. Check the latest patch notes on Pro Game Guides since the mirror's behavior has been adjusted in recent updates, including a fix where it now correctly breaks immediately if you're below 20% sanity.
- Monkey Paw: Using "I wish to be sane" sets all players to exactly 50% sanity but increases passive drain by 50% afterward. Weather wishes cost 25% sanity each.
- Music Box: Standing within 2.5 metres of an active Music Box drains 2.5% sanity per second.
- Ouija Board: Each question costs sanity based on the type of question asked.
- Summoning Circle: Each candle lit deducts 16% sanity from nearby players.
- Tarot Cards: Drawing The Sun restores sanity to 100%. Drawing The Moon drops it to 0%. The Wheel of Fortune either adds 25% (burns green) or removes 25% (burns red).
- Voodoo Doll: Each pin costs 5% sanity, except the heart pin which costs 10%.
Tarot Cards can flip sanity instantly
How to restore sanity and prevent hunts
The most direct recovery tool is Sanity Pills. Pop them and your sanity climbs back up over a short period. The exact amount restored depends on your difficulty settings, so on Amateur you'll get significantly more back per pill than on Professional.
Beyond pills, keeping the lights on is your primary passive defense. Flip every wall switch in rooms you're actively working in. On large maps with unavoidable dark zones, place Firelights strategically to reduce drain in areas where you'll spend extended time.
Hunt thresholds matter here too. Most ghosts can only attempt a hunt when the average team sanity drops below their specific threshold. Keeping the team average above 50% is a reasonable general target to limit hunt frequency, though specific ghost thresholds vary. The "Get average sanity below 25%" objective exists precisely because hitting that number is risky enough to be worth bonus rewards.
The sanity objective that tasks you with reaching 0% sanity pays out $50 and 50 XP when completed. It's a daily task, so it's worth planning around if it appears in your rotation.
Difficulty settings and sanity
Three specific settings in the difficulty menu directly control sanity behavior:
- Starting sanity: How much sanity each player begins with (can be set below 100% on Custom).
- Sanity pill restoration (%): Controls how effective pills are.
- Sanity drain speed (%): Multiplies how fast sanity falls in darkness.
Custom difficulty lets you set drain speed anywhere from 0x to 2x, which makes it useful for practicing sanity management under controlled conditions before jumping into higher difficulty contracts.
For more strategies across Phasmophobia and other horror titles, browse more guides on GAMES.GG to keep your investigation toolkit sharp.