What Penal Labor Actually Is
Penal Labor is the post-completion dungeon farming system in Persona 5. Once you finish a Palace's main objective, you can still go back in. Each visit costs one hour of in-game time. You earn PL points by clearing floors, and those points buy items from vending machines scattered throughout the dungeon. That's basically it. It's not complicated, but it's also not particularly elegant, and there are some rough edges you'll run into if you try to optimize it. Clearing a floor gives you PL points. The amount depends on the floor type. Boss floors give the most, normally around 100 to 150 points depending on difficulty. Regular enemy floors give roughly 10 to 30. The higher the floor number, the more points you get. Floor 99 will always be worth more than floor 1, so naturally everyone wants to grind the late-game areas first. Vending machines appear in every completed Palace. Each one sells different things, and their stock rotates partially based on how many PL points you've spent at them. You can buy spell cards, fusion material items, cash, and once you hit certain thresholds, some really useful stuff like max health upgrades and skill cards for Personas you already fused.
How to Actually Farm Efficiently
The most common approach is to skip the early floors entirely and warp straight to the highest floor you've reached, clear it, warp back, repeat. This takes about two to three minutes of real time per run if you know the Palace layout, which most do after completing it once. Clearing the same floor over and over is faster than trying to run the whole thing end to end, and you can do it while listening to a podcast or literally anything else. You need to be careful about when to do this though. There's a mechanic where the enemy difficulty scales slightly upward the more floors you clear in a single Penal Labor run. If you warp to floor 80 and just stay there clearing enemies, they'll eventually get tougher mid-session. It's a small effect but it adds up if you're farming for a long time. The workaround is simple: clear the floor, warp out, warp back in, repeat. Don't stay on the same floor for more than a few runs without restarting the session. I spent maybe six hours grinding Mementos in a single run one time because I didn't know this. The enemies on the deeper floors were meaningfully harder by the end, and I died to something that should've been trivial. Never again. Just restart your Penal Labor session every couple of floors and keep it fresh.
What the Shops Actually Sell
Each Palace has its own unique vending machine with exclusive items. The generic shops sell cash, spell cards, and healing items. The Palace-specific ones are where the useful stuff lives. Leblanc coffee upgrades, extra inventory slots, and skill cards are all purchasable with PL points. Some of the rarer skill cards require several thousand PL points, so you'll need to put in real time before you can buy them. There's also a request system through Kasumi at the Phantom Thieves' hideout. She'll sometimes give you side requests that track your Penal Labor progress. Completing these gives you bonus rewards, including items you can't get from vending machines. Check her board every few in-game days. It doesn't cost anything to check, and the rewards can save you a trip to a shop.
Get the Full Details
Common Mistakes People Make
The biggest waste of time is clearing every single floor from one to whatever your max is, every single run. You're burning ten to fifteen minutes for maybe thirty extra PL points. It's not worth it unless you're trying to unlock a specific low-tier shop item you haven't reached the point threshold for yet. For 95 percent of players, this is a terrible use of time. Another mistake is ignoring the spell card drops from regular enemies. Spells don't drop that frequently, but if you're farming a specific floor, you'll accumulate them over time. Some spells are genuinely useful for fusion, and buying them from shops costs way more PL points than farming them directly. It adds up across multiple run-throughs of the same Palace. And don't skip the boss floors. Clearing the boss of a completed Palace gives you a chunk of PL points plus a guaranteed item drop. It's the fastest way to earn points per minute of gameplay, even if the fight itself takes longer than an enemy floor. Time it right and you're getting maybe 150 points for a fight that takes two minutes. That's better than any regular floor grind rate.
When Penal Labor Isn't Worth It
There are honest limitations to this system. The PL point economy is generous but slow. If you need specific items urgently, grinding Penal Labor won't get them to you fast enough. Cash is another thing the system handles poorly. You can earn money from Penal Labor, but if you're short on yen for a fusion, it's usually faster to just do confidant requests or sell items from your inventory. Penal Labor was designed as a side activity, not a primary resource loop. Skill card farming through Penal Labor is also inefficient compared to other methods. If you need a specific skill for a Persona fusion, it's generally faster to just fuse for it or buy it from a shop early on. Penal Labor shops unlock their best skill cards only after you've spent significant points, which means you have to grind first to even see the items you actually want. It's a catch-22 that slows down early game character building if you rely on it too heavily. If you're playing on New Game Plus, Penal Labor becomes significantly less relevant. You'll already have access to most of the shop items, higher-level Personas, and better resources from your first playthrough. The grind is mostly redundant at that point unless you're going for 100 percent completion or collecting every skill card in the game.
Quick Reference
Each Penal Labor visit costs one in-game hour. Warp to your target floor. Clear it. Repeat. Check Kasumi's requests every few days. Don't stay on the same floor for extended sessions. Boss fights are the most efficient point source. Cash and urgent items are better farmed elsewhere. The system works best as a passive side activity rather than something you focus on intentionally.
