High alchemy and the price floors of OSRS

By the GrandExchange.com team. Published August 23, 2026, updated August 23, 2026 - 7 minute read.

Most Grand Exchange prices float freely on supply and demand, but hundreds of items have a hidden safety net: High Level Alchemy. Because any item can be converted into a fixed number of coins with one spell, no item can trade very far below its alch value for long. That single mechanic quietly shapes the bottom half of the entire OSRS economy, and understanding it tells you which items can crash and which physically cannot.

The mechanic in one paragraph

High Level Alchemy is a level 55 Magic spell that destroys an item and pays out its high alch value in coins, a fixed number set by Jagex (normally 60% of the item's store value). Casting it costs one nature rune plus fire runes, and the fire runes are free in practice because nearly everyone alchs with a fire staff equipped. So the real cost of turning an item into gp is: the item itself, plus one nature rune, plus a few seconds of your time.

Every item page on this site lists the high alch value in its stats panel, next to the live GE price, so the comparison that matters is always one glance away.

Why that creates a price floor

Imagine an item with a high alch value of 10,000 gp trading on the GE at 9,000 while nature runes cost 100 gp. Anyone can buy it, alch it, and pocket roughly 900 gp of risk-free profit per cast. Players do exactly that, at scale: buying pressure lifts the GE price until the gap closes. The equilibrium is simple:

price floor ≈ high alch value − nature rune price

Below that line, alchers absorb every item sellers can produce, because converting the item to coins beats selling it to another player. The floor is not a rule Jagex enforces on the GE; it is an arbitrage that thousands of players enforce for free, many of them happily paying a small loss per cast anyway because alching is one of the standard ways to train Magic. That training demand means popular alchables often trade slightly above the strict break-even line.

Which items sit on the floor

An item ends up pinned to its alch floor when supply is high and player demand is low. The classic categories:

Smithable and fletchable gear. Rune armour, mid-tier weapons and high-level bows are produced in bulk as skilling by-products, far beyond what anyone wants to wear. Their market-clearing buyer is the alcher.
Common hard drops. Many boss and slayer drops (battlestaves, dragonhide bodies, rune items) arrive in the economy faster than players consume them.
Dead content rewards. Items nobody uses any more drift down until alchers become the only bid.

By contrast, consumables like food, potions and runes usually trade far above their (often negligible) alch values, because real players eat them, drink them and cast with them. For those items the floor is irrelevant; supply and demand alone set the price. The split matters: a floored item and a floating item with the same chart shape are entirely different trades.

How traders use the floor

The alch floor is the closest thing OSRS has to a bond: known downside, modest upside. Practical uses:

Downside protection. Buying an item a few percent above its floor caps your loss. If the price falls to the floor, you can alch your stack yourself and recover the alch value minus rune costs, whatever the GE is doing.
Crash shopping. When an update dumps a floored item, the crash stops at the floor. Buying panic sells just above alch value is one of the lowest-risk entries in the game, because the exit is guaranteed by the spell, not by finding another buyer.
A sanity check on "cheap". An item trading 40% above its alch value can still halve. An item trading 3% above its alch value cannot, short of Jagex changing the alch value or nature runes spiking. Check the gap before trusting a chart.

One warning: the floor moves with nature rune prices, and Jagex occasionally rebalances alch values in updates. Both are visible on this site the moment they happen, on the nature rune page and in the market reports that follow each update.

Quick answers

Is buying to alch ever profitable? Briefly and marginally, when an item dips below its floor. Those windows close fast because everyone can see them; treat alching as Magic training that partially pays for itself, not an income source.
Do buy limits apply to alchables? Yes, like every item. Bulk alchers spread purchases across several items and windows. See buy limits explained.
Does the GE tax change the floor math? Alching bypasses the GE entirely, so the 2% tax makes the alch exit slightly more attractive relative to selling. Details in the GE tax explained.
Where do I see alch margins at a glance? Every item page shows high alch value beside the live price, and the calculators section includes alchemy profit tools.