CS2 Trade Up Contract Guide: How It Works + Profitable Trade Ups

CS2 Trade Up is undoubtedly the only mechanic where you upgrade your inventory through choice and math, not pure case-opening luck. Well, in fact, it might look like a totally random experience. In reality, you can clearly know a chance to obtain the target item. At the same time, the rules changed twice recently in late 2025 and May 2026. Still, we explored all the details, so this guide is up to date while most aren’t. Ready to get the skin you want without any issues? Then follow our material to learn the whole process and the crucial differences.

How CS2 Trade Up Contracts Work

Before we dive into all the details, let’s start with the basics: how do Trade Ups work in CS2? In short, the CS2 Trade Up Contract lets you upgrade your inventory by using skins you don’t need. Released on September 12, 2013, in the Arms Deal update, it became an instant hit in the community. Although the core mechanics have remained the same, two recent updates have significantly changed the rules. We will explore them a bit later, but for now, it could be helpful to understand what exactly lies behind this mechanic.

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The Core Mechanic

The Trade Up Contract in CS2 simply means using 10 skins of the same rarity (e.g., Mil-Spec) to get 1 skin of the next rarity up (e.g., Restricted). This 1 skin is drawn from the collections your inputs belong to. But is it completely random?

Why the Output Isn’t Fully Random

In fact, the result depends on the collection you use. For example, if you use 10 skins for the CS2 Trade Up Contract from the same collection, you receive 1 higher-grade skin from that exact collection. In the case of 10 skins from different collections, each collection has equal odds (e.g., two collections = 50/50, four collections = 25/25/25/25).

How to Do a Trade Up (Step by Step)

Still, it would be helpful to know the step-by-step process for the CS2 Trade Up. First, open your in-game Inventory and choose Trade Up. Now, select 10 skins of the same rarity (as soon as you add one item, the system shows you the other available skins of the same rarity). The last step is to press Ready To Trade Up to add a new item to your collection.

Looking for more information about opening cases? Then be sure to explore our CS2 Case Opening Guide so you don’t miss any details!

Trade Up Rules You Need to Know

Of course, there are specific conditions that determine whether the CS2 Trade Up succeeds or fails. Before we explore all of them, let’s check the tier system:

• Consumer Grade
• Industrial Grade
• Mil-Spec
• Restricted
• Classified
• Covert
• Extraordinary / Rare Special (Knives / Gloves)

While this tier system looks simple, it’s important to understand the differences between each rarity, since they directly affect the CS2 Case Odds.

Rarity Tiers & Inputs

The first rule you should understand is how many skins you need for each rarity. To avoid any misunderstandings, we provide a small table with all of them below:

Input Rarity	How many do you need	Output Rarity
Consumer Grade	10x	1x Industrial Grade
Industrial Grade	10x	1x Mil-Spec
Mil-Spec	10x	1x Restricted
Restricted	10x	1x Classified
Classified	10x	1x Covert
Covert	5x	1x Knife / Gloves

As you can see, under the new rules of the CS2 Trade Up system, you can also get the knife or the glove, depending on the Covert skins you use. We will explore it below.

Collections & Odds

With the CS2 Trade Up Contract, it is also important to know that the same collection inputs (skins you use) give a more predictable output pool (a range of skins you obtain). Mixed collections split the chance evenly.

For example, you use 10 Industrial Grade rarity skins from the Achroma Collection (M4A4 | Aeolian Dark). In that case, you have an equal chance to obtain one of four Mil-Spec Grade rarity skins from the same collection.

Or, you can use 5 Industrial Grade rarity skins from the Achroma Collection and 5 Industrial Grade skins from the Harlequin Collection. In this situation, you have equal chances (50/50) to obtain one of the Mil-Spec Grade rarity skins from both collections. And each skin shares 12.5% odds.

It is also crucial to mention that you should check the collections from which you get the skins you use. The reason is that some collections don’t offer Cover rarity skins or knife/gloves. As a result, for some Trade Ups, you cannot use the skins from these collections (e.g., P250 | Franklin).

Float & Condition

In the CS2 Trade Up system, float is no less important a detail. In fact, the output float is based on the average float of your inputs. As a result, low-float inputs can yield a better-condition (FN/MW) output. To understand the exact output float, you can use a simple formula:

• Average Input Float = the sum of the total float of all skins you use, divided by the number of skins (e.g., 0.100 + 0.456 + 0.064… ÷ 10 skins).
• The Output Float = (Max Float – Min Float) x Average Input Float + Min Float.

StatTrak Rules

Also, it’s important to remember that every input must be the same type. In other words, you can’t mix StatTrak and non-StatTrak skins. StatTrak inputs produce only a StatTrak output.

In fact, as we mentioned before, your task is to choose the first skin in the in-game Trade Up window.

The system automatically filters only available variants suitable for this exact contract, regardless of whether all needed skins are available for the process. To make it simpler, you can add 1 Classified StatTrak skin to the contract, but if you don’t have the other 9 same Classified ST skins in your inventory, the system won’t allow you to finish the process.

What Can’t Be Used

For now, stickers and charms on input skins are not transferred. You only get the base skin. It could be helpful not to use skins in the Trade Up with valuable stickers. You simply lost them in the process.

New Trade-Up Rules

No less important to mention are two changes we got in late 2025 and May 2026. They instantly changed the rules of Trade Ups, providing a completely new perspective on the system.

Knife & Glove Trade-Ups (Late 2025)

The October 2025 Re-Retakes update added a new contract type. Now, players have an option to use 5 Covert skins to get 1 knife or a pair of gloves. Still, there are important details you shouldn’t ignore. For example, for the CS2 knife Trade Up, you have to use 5 Covert skins from the collections that contain knives. Also, you can use 5 standard or 5 StatTrak weapon skins to get 1 standard or 1 StatTrak knife. For the CS2 glove Trade Up, in contrast, you can use only standard Covert skins from the collection that contain gloves. You cannot use StatTrak skins because there are simply no ST gloves available.

In both cases with the standard skins, you can mix them in the Trade Up, adding weapon finishes from both collections, including knives and gloves. Still, it splits the odds, making the final result less predictable. Also, glove outputs are float-sensitive. In other words, it could be better to plan low-float inputs.

Follow our guide for all the details about the Upgrade CS2 Skins on OpenStars.

Souvenirs Now Usable

Another change we shouldn’t ignore is the May 22, 2026, update that allowed players to use Souvenir skins in Trade Up Contracts, a feature that hadn’t been possible for years. Still, it’s better to know that the output is a standard-quality skin, one tier up. In other words, all Souvenir skins you use for the Trade Up simply lose the Souvenir status and tournament stickers.

Why Outdated Guides Get This Wrong

As you can see, understanding the new rules could instantly change your Trade Up experience, offering greater versatility compared to the old rules. That’s why it’s important to have a guide and a CS2 Trade Up calculator that also updates all the details. Remember to confirm rules and current prices before locking any contract.

How to Find Profitable Trade Ups

Another question we should explore is the profitable CS2 Trade Ups. While it is possible to profit from a Trade Up Contract, there is no guarantee. Still, to avoid any mistakes, let’s explore the key you should check before the process.

In addition to profitable tips, players are also looking for the best CS2 Cases to open. While the outcome is random, each case shares a different ROI (Return on Investment).

Understanding Expected Value (EV)

The first detail is the Expected Value (EV). The EV is simply the value of the skin you expect to get after the Trade Up. Some contracts are positive-EV over many attempts. At the same time, a single contract can still lose money. Overall, no contract is guaranteed to be profitable.

Float Targeting

No less important is to buy low-float inputs to push the output into a higher-value condition. The reason is that even a small float improvement can move the output across a wear bracket (e.g., 0.06 is still Factory New, while 0.07 is already Minimal Wear, which significantly changes the price).

Price Spikes After Updates

Also, you should know that game updates, such as new collections or the mentioned knife/glove and Souvenir changes, cause volatility (opportunities and traps). Remember to recheck prices the same day you are going to make the Trade Up.

Using a Trade-Up Calculator

In the end, the best way to avoid mistakes and clearly see the odds of obtaining the target output is to use a Trade Up Calculator. Such a tool works as an in-game feature, but with more details like the skins you can use, the mix options, and possible results, along with the odds. You simply choose the skins and instantly see the possible outcomes.

Best Trade-Up Examples

Now, let’s check the best CS2 Trade Ups. Remember that there is no guaranteed profit. Always verify current prices before the process.

• 10x MAC-10 | Allure → M4A4 | Tooth Fairy
• 10x Sawed-Off | Apocalypto → AK-47 | Phantom Disruptor
• 10x MAC-10 | Last Dive → M4A1-S | Decimator

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Common Mistakes & Scam Warnings

In the end, it could be helpful to mention the common mistakes players usually make during Trade Ups. No less important is avoiding scam services. Potentially, it will save you both time and money.

For players who are not ready to explore everything about Trade Ups for a simple upgrade, it could be helpful to find a trustworthy platform. Here, on OpenStars, you can easily buy CS2 skins and add them to your inventory within minutes.

Mixing Rarities or Types

First, remember not to mix rarities and types (StatTrak with non-StatTrak). Here, we must mention that some players try to use 5 StatTrak skins from the collection with gloves. Since there are no StatTrak gloves, we cannot use them in Trade Up. This is also the reason for the lower value of such skins (compared to standard versions) on the market.

Ignoring Float

Also, you shouldn’t ignore the skins’ float. While high-float finishes may be cheaper, they are the most common reason a “profitable” contract ends up losing money.

Trusting ‘Guaranteed Profit’ Sites

Another mistake some players might make is trusting third-party platforms or simulators that promise guaranteed returns. In fact, due to the market fluctuations, no site can guarantee a Trade Up profit. It could be better to verify the float and current value manually on the same day you are ready to use the Trade Up feature.

Using Outdated Rules

The last mistake is to follow the old rules with no knife/glove/Souvenir Trade Ups. Undoubtedly, Valve rarely changes such crucial functions. Still, it’s better to follow them to understand what exactly you can and cannot do.

Conclusion

As you can see, Trade Ups reward planning, such as checking rarity, collection, and float, over luck. Moreover, while it is never guaranteed, you can make a profit. It is especially possible due to the twice-changed rules, which allow the use of both Covert and Souvenir skins in the Trade Up Contract. But, undoubtedly, you can make it only by using the current info. Ready to upgrade your inventory and get a higher-tier rarity skin? Then be sure to follow our guide to avoid any mistakes!

FAQ