Crafting flips work on a simple premise: buy the raw materials, turn them into a finished product, and sell that product for more than the materials cost. The idea is simple. Getting the math right consistently is where most people trip up, because a crafting margin has more moving parts than a plain buy-low-sell-high flip.

How the margin actually works

A crafting margin is the finished item's sell price, minus the sum of every component's buy price, minus the 2% sell tax on the finished product. That "sum of every component" part is the trap — a recipe with four ingredients has four independently moving prices, and it's easy to price-check the finished item and one or two obvious materials while forgetting a smaller, cheaper component that's quietly eaten into the margin. Always total every single input before deciding a recipe is worth doing, not just the expensive-looking ones.

Levels change what's available to you

Most crafting recipes require a minimum skill level, and that acts as a natural filter on competition. A recipe that needs a high level has a smaller pool of players who can even attempt it, which often means less crowding and more stable margins than a recipe anyone can do from level one. If you've invested in a skill, the recipes gated behind that level are worth checking specifically for this reason — you're not competing with the entire player base for that margin.

A recipe that looked profitable using a price snapshot from ten minutes ago can be a loss by the time you've bought everything. Materials move independently of the finished product — check all of them fresh, right before you commit, not from memory.

Byproducts are part of the calculation too

Some recipes leave you with leftover materials or produce a secondary item alongside the main one. If that byproduct has real market value, it should be subtracted from your effective cost, not ignored — a recipe that looks marginal on the primary item alone can turn genuinely profitable once you account for what else you walked away with. It's an easy detail to miss because it doesn't show up in a simple "buy price vs sell price" comparison.

Why this is worth automating rather than doing by hand

Manually re-checking four or five live prices every time you want to evaluate a recipe doesn't scale — by the time you've looked them all up, some of them have already moved again. This is exactly the kind of repetitive, time-sensitive math that's worth letting a tool handle instead of your own mental arithmetic, since the answer needs to reflect the current second, not the price you remembered from your last check.

Buying in bulk changes your own prices

Every purchase you make nudges the buy price up slightly, and the effect compounds as you buy more of the same material in one session. A recipe that looked comfortably profitable for the first ten units can quietly erode as you keep buying — by unit fifty, you might be paying meaningfully more than your original calculation assumed. Large-scale crafting runs are especially exposed to this, since the very act of buying enough materials to make the run worthwhile is what pushes the price against you. It's worth re-checking prices partway through a large buy rather than assuming the number you calculated at the start still holds by the end.

Comparing crafting against just buying the finished item

Before committing to a crafting run, it's worth explicitly comparing your total cost to simply buying the finished item outright on the Grand Exchange. Sometimes the "flip" isn't actually a flip at all — the finished item trades so close to the sum of its components that crafting it yourself barely beats buying it directly, once you account for your own time spent gathering materials and executing the trades. A genuine crafting flip should show a clear, comfortable gap between your all-in cost and the finished item's sell price — if that gap is thin, the crafting step usually isn't adding real value over just buying the end product.

A quick habit worth building

Before starting any crafting session, jot down (mentally or literally) the exact total cost per unit you calculated and the price you're expecting to sell at. If the actual numbers drift meaningfully from that plan partway through — because materials got more expensive or the finished item's price softened — that's your cue to stop and recheck, rather than finishing the run on autopilot assuming the original math still holds.

The tracker's Crafting tab does this automatically — it pulls live prices for every component in a recipe, sums them against the live sell price of the finished item, and ranks every recipe by current margin, so you're always looking at today's numbers instead of yesterday's memory.