Daily Survival: What Prisoners Use as Currency (And Why You Should Too)

There’s a working laboratory for what happens when cash stops existing, and it’s been running this experiment for decades: the American prison system. Inmates aren’t allowed to hold money.

Every facility bans it outright. And yet every facility has a functioning economy anyway, with prices, wages, savings, and even inflation. Whatever emerges as money in that environment earned the job the hard way, through thousands of daily trades between people who trust each other about as far as they can throw each other.

That makes prison currency one of the most honest field tests ever run on what people will actually accept as payment when the dollar is off the table. And if you’re building a barter stockpile for a genuine collapse, you’d be foolish not to study the results.

The Currency That Died Overnight

For most of the twentieth century, the answer was tobacco. Cigarettes were small, uniform, durable, easy to count, and wanted by nearly everyone, which is the exact same reason they became money in German POW camps during World War II.

An economist named R.A. Radford, himself a prisoner at Stalag VII-A near Munich, documented the whole system in a famous 1945 paper: rations of margarine trading for seven cigarettes, chocolate bars carrying known exchange rates, prices consistent across the camp’s huts like any functioning market.

The Plant You Can Smoke and Will Actually Help You Breathe Better

American prisons ran on the same cigarette standard for decades. Then, starting around 2004, the federal system banned smoking, and the currency died almost overnight. Cigarettes became contraband, which made them too dangerous and too valuable to circulate as everyday money.

But the economy didn’t collapse. It simply auditioned new currencies, and within a few years, three replacements had taken over. An entire economy switched its money in real time, without a single meeting being held.

The Fish that Became the Dollar

The federal system settled on something stranger: pouches of mackerel, known as macks. On paper, it makes no sense. It’s oily fish that costs about a dollar forty at the commissary.

In practice, the Mack is almost perfectly engineered to be money:

First, an unopened pouch keeps for years, so it survives changing hands hundreds of times.
Second, and this is the strange part, almost nobody actually wants to eat it, apart from weightlifters chasing cheap protein. That sounds like a flaw. It’s actually the feature. Because macks rarely get consumed, they keep circulating like coins instead of disappearing into someone’s stomach.
Third, commissaries cap how many pouches an inmate can buy per week, which means new money enters the economy at a steady, predictable rate, keeping its value stable the way a disciplined central bank would. The mack even shows measurable inflation: a pouch that traded at about a dollar in 2021 was going for around a dollar thirty by late 2023.

One more detail worth savoring – Prisons pushed suppliers to switch from cans to pouches because a can could be sharpened into a knife. The currency was literally redesigned for safety, the way governments redesign banknotes.

And one fish importer reportedly moved over a million dollars of mackerel a year into prison commissaries while barely selling the same product in regular discount stores. An entire species of fish found its market not on dinner plates but as money.

Why Ramen Took the Crown

In state prisons, the crown went to instant ramen, which inmates call soups. A sociologist named Michael Gibson-Light spent a year inside a state prison studying the informal economy and found the entire thing ran on noodle packets.

Inmates paid soups for laundry service, bunk cleaning, haircuts, and smuggled fresh vegetables from the kitchen. They used them as poker chips. A sweatshirt worth roughly ten dollars sold for two packs of ramen, which tells you how much purchasing power a 59-cent packet carried inside those walls.

Prison food budgets were cut hard across the country, and portions shrank alongside quality. Ramen won because it directly solved the most widespread problem in the building, which was hunger.

When a system breaks down, the thing that becomes money is the thing that answers the most urgent, most universal need.

So make sure you have a mountain of instant ramen and other “just add water” foods in your stockpile. They’re cheap now, they keep for years, and one packet delivers hot, savory calories with carbs and dehydrated vegetables in under five minutes. Yes, the sodium is high, but when you’re hungry and worn down, salt is exactly what your body is asking for.

And ramen is just one of them. 37 other foods belong on your shelves, the same ones American families leaned on to survive the hardest times this country has seen. See the full list here.

The Only Prison Money That Works Outside

Forget goods entirely for a minute, because the real wealth inside a prison was never in anyone’s locker. It’s in their hands.

Every block has its earners:

The jailhouse lawyer drafts appeals and parole letters for men who can’t fight their own cases, and gets paid in food and hygiene products for every page.
The barber technically works for free, but everyone tips, because everyone has seen the haircut of the man who didn’t.
The cake man turns four dollars of commissary ingredients into a cheesecake that sells for eight, slice by slice.
The fix-it man repairs the cheap radios, hot pots, and tablet chargers the commissary sells, and never runs out of work because the commissary never stops selling junk.
The artist sells portraits and hand-drawn greeting cards, and one card can earn more than a full day at a prison job.
The letter-writer reads and writes mail for men who never learned, and stays busy every single week.

At the top of all of it sits the tattoo artist, the most respected hustle inside, with waiting lists that can stretch to a man’s release date.

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Stock Your Shelf Like a Commissary

Run your own preps through those five checks, and your barter shelf pretty much stocks itself:

Coffee – the closest thing out here to prison ramen. Shelf-stable, everybody wants it, cheap to stack up now, miserable to live without. Grab individual instant packets over big tins so you can trade one at a time.
Disposable lighters – cost pennies today and check every box: small, tough, and wanted by anyone who needs fire, which after a collapse is everyone.
Sealed hygiene items (bar soap, razors, travel toothpaste) – move the same way they do in a prison commissary, because comfort turns into luxury the second the shelves stop restocking.
Salt, sugar, hard candy – old trade goods for a reason. They keep forever and split into any size deal.
Sewing needles, fishing hooks, water purification tablets – pack a lot of value into almost no space at all.

Two things to keep in mind before you load up that shelf:

Go easy on ammunition as a trade item. Handing a stranger both something they want and the means to take the rest of your stuff off you is a risk the prison economy never touched.
Stockpile a few things you personally wouldn’t miss. Remember the mack: the best trade item is usually something you don’t want for yourself, because that’s exactly what keeps it moving instead of ending up in your own pantry.

The Five Tests Every Real Currency Passes

Line up cigarettes, ramen, macks, and stamps side by side, and the pattern jumps out at you. Every currency that’s ever taken hold in a broken system – POW camps, prison blocks, collapsed economies overseas – passes the same five checks:

Does it last without falling apart?
Is it small and light enough to carry around?
Can you break it into smaller pieces for smaller trades?
Is the supply limited enough that it can’t flood the market overnight?
Will the next guy actually take it off your hands?

Here’s the part that throws people off: none of that has anything to do with the item being valuable on its own. Forget gold or rarity as value. The mack proved that a dollar’s worth of fish nobody wants to eat can beat out stuff worth way more – just by scoring well on those five things.

And you know what else scores well? Things you probably don’t have in your stockpile. Right now everyone’s stockpiling gold, silver, and ammo. But in a real SHTF situation, if everyone’s holding the same thing, its value drops.

There are other common items proven to hold their worth. They’ll actually become rare in a crisis. Curious which ones? Head to final18.com to see how value shifts once a crisis hits.

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