Hey chief,

Hammer Jam is one of the best opportunities to speed up your Clash of Clans progression before the new Town Hall Update drops.
With eligible upgrade costs and times reduced by 50%, you can complete more upgrades while spending fewer resources.

However, simply upgrading whatever is available isn't the best strategy. You need to prepare your village, manage your Builders, use Magic Items wisely, and prioritize upgrades that offer the biggest savings.

This Clash of Clans Hammer Jam Guide covers everything you need to make the most of the 2026 event, including upgrade priorities, potion strategies, Goblin Builder tips, and a last-day trick.

Hammer Jam 2026: Everything You Need to Know

Okay chief,

Imagine Clash just dropped a Black Friday sale, but for your entire Home Village. That's Hammer Jam.

During the event, eligible upgrades receive a 50% discount on both time and cost. That means buildings, defenses, Walls, Heroes, research, and Pets become significantly cheaper and faster to upgrade.

Hammer Jam 2026 runs from November 1 to November 16, giving you 16 days to make the most of these discounts.

And here's the good part: the Gold Pass time reduction stacks with Hammer Jam, helping you finish upgrades even faster.

However, not everything gets discounted. Supercharges and crafted defenses are excluded.

So, don't waste these 16 days upgrading randomly. Let's make every Builder count.

If you still haven't unlocked your sixth Builder, start working towards it now. Having an extra permanent Builder makes a huge difference, especially during events like Hammer Jam.

Before Hammer Jam: Prepare Your Village

A little preparation can help you get more upgrades running and avoid wasting valuable Builder time.

Restart Long-Running Upgrades

Consider cancelling and restarting long upgrades that began before Hammer Jam.

For example, a 10-day upgrade with seven days remaining can be restarted during the event and completed in five days instead, saving two Builder-days.

Always check the resource refund before cancelling. Prioritize upgrades with plenty of time remaining, as they offer greater potential savings.

Collect Magic Items and Save Gems

Stock up on Builder, Pet, and Resource Potions through the League Medal Shop, Raid Medal Shop, Clan Games, Supercell Store, and in-game challenges. Remember that some shops have weekly purchase limits.

If you haven't unlocked all your permanent Builders, start working towards the next one. Also, consider selling unwanted Magic Items, such as Clock Tower Potions and Builder Star Jars, for gems. Runes may also be worth selling if you can easily farm the resources you need.

Make the Most of Your Magic Items & Potions

You don't want to upgrade randomly like a goblin in a Gold Mine. Hammer Jam is all about getting the maximum value from your resources, Magic Items, and Builders.

Here's what you should prioritize:

1. Save your League Medals for Builder Potions: One Builder Potion saves up to 54 hours with six active Builders. During Hammer Jam, this can help you complete multiple upgrades and free up Builders faster.

1. Take advantage of stacked time reductions: The Gold Pass time reduction stacks with Hammer Jam's reduction. Use code BLUE when making eligible in-game purchases.

2. Use Research and Pet Potions: Since Laboratory and Pet upgrade times are also reduced, these potions can help you progress through upgrades faster.

3. Collect Resource Potions: More resources mean more upgrades. Check the Raid Medal Shop, Clan Games, Supercell Store, and in-game challenges for available potions.

You can also consider hiring the Goblin Builder and Goblin Researcher to run additional upgrades. Just remember that each costs 40 gems per day, so use them strategically rather than automatically hiring both for the entire event.

Should You Hire the Goblin Builder and Goblin Researcher?

Both the Goblin Builder and Goblin Researcher cost 40 gems per day.

Hiring both throughout the event costs 1,280 gems. With both active, you can have up to seven upgrades running simultaneously.

However, Builder Potions can finish Goblin Builder upgrades faster, meaning you may need to hire the service again if you want to keep using it. You don't have to hire either service for the entire event; use them strategically for longer upgrades.

Which one should you prioritize?

If you can afford only one, prioritize the Goblin Builder. It helps you progress through building and defense upgrades.

The Goblin Researcher is worth considering if you frequently use a particular troop or spell. Otherwise, spending gems to upgrade troops you rarely use may not be the best investment.

How to Manage Your Builders During Hammer Jam

Use Your Builder Apprentice and Lab Assistant

Assign your Builder Apprentice and Lab Assistant to longer upgrades to get more value from their assistance.

If potions finish upgrades earlier than expected, reassign them where possible. Avoid spending extra gems to upgrade these assistants just for Hammer Jam; they're better treated as long-term investments.

Keep Builders Active and Spend Excess Loot on Walls

Your priority should be keeping Builders occupied rather than leaving them idle while waiting for resources.

During dedicated farming sessions, temporarily free up one Builder and use the reduced Wall costs to spend your excess Gold and Elixir. Once you're done, assign that Builder to a regular upgrade.

For farming, simple spam armies such as Valkyries can help you collect loot without spending too much time on each attack. Aim for at least one star and the available loot bonus, or use your preferred farming army.

❓ What Should You Upgrade First During Hammer Jam?

Your upgrade priorities depend on how developed your village is.

If Your Village Is Rushed..

Focus on upgrades that improve your overall attacking and defensive strength:

1. Heroes: Improve their strength and attack potential.

2. Offensive Buildings: Prioritize your Clan Castle, Army Camps, Barracks, and Spell Factory.

3. High-DPS Defenses: Upgrade powerful defenses with longer upgrade times.

If Your Village Is Nearly Maxed..

If you have only a few small upgrades left, such as traps and lower-level defenses, consider moving to the next Town Hall.

Longer upgrades offer greater time savings during Hammer Jam. For example, an eight-day upgrade takes only four days.

Moving up can give you access to more long upgrades and help you get more value from the event. However, if your village is rushed and still has plenty of upgrades remaining, focus on catching up instead.

⚠️ The Last-Day Hammer Jam Trick You Shouldn't Miss

Here's an important trick: eligible upgrades started during Hammer Jam retain the 50% reduced upgrade time even after the event ends.

You don't need to finish an upgrade before November 16. You only need to start it before the event timer expires.

Save Your Longest Upgrades for the Final Day

Keep your five longest remaining upgrades ready for the final day.

• Identify the upgrades you want to start.

• Collect enough resources beforehand.

• Make sure you have the required Builders available.

• Start them before Hammer Jam ends.

This lets you carry the reduced upgrade times beyond the event. Don't wait until the final minutes; prepare everything in advance.

💰 Farming During Hammer Jam (aka the Loot Olympics)

You'll need plenty of resources to keep your Builders busy. So, don't spend the entire event waiting for loot.

If you want efficient farming, try:

• Sneaky Goblins: Great for targeting loot quickly.

• Mass Baby Dragons: A simple option for relaxed farming.

• E-Drags or regular Dragons with Lightning: Useful if you prefer a straightforward farming army.

If you're struggling to get consistent loot, check out these best Clash of Clans attack strategies for army options across Town Halls.

You can also protect your resources with these Best Farm Bases.

And don't forget: temporarily free up one Builder during your farming sessions to spend excess loot on discounted Walls. Once you're done, put that Builder back to work.

🚩 Hammer Jam Mistakes You Should Avoid

• Buying Hammers without comparing value: Builder Potions may offer better value during the event.

• Wasting Builder Potions: Don't activate them when you can't immediately start the next upgrades.

• Leaving Builders idle: Keep them working except during dedicated Wall-farming sessions.

• Spending gems unnecessarily: Prioritize useful upgrades and Goblin services over rushing your assistants.

• Upgrading excluded defenses: Supercharges and crafted defenses are excluded.

• Ignoring the final-day trick: Start your longest upgrades before the event expires to retain the reduced time.

🎯 Your Hammer Jam 2026 Action Plan

Before Hammer Jam Ends

🔹 Identify long-running upgrades worth canceling and restarting.
🔹 Check resource refunds before canceling upgrades.
🔹 Collect Builder, Pet, and Resource Potions.
🔹 Sell unwanted Magic Items and save gems.
🔹 Prepare your Builders and Laboratory for new upgrades.

During Hammer Jam

🔹 Keep Builders occupied and prioritize longer upgrades.
🔹 Use potions when you can immediately start the next upgrade.
🔹 Farm regularly and spend excess loot on Walls.
🔹 Use the Goblin Builder and Researcher strategically.
🔹 Reassign your Builder Apprentice and Lab Assistant when needed.

On the Final Day

🔹 Prepare your five longest remaining upgrades.
🔹 Collect the required resources and free up Builders.
🔹 Start the upgrades before the Hammer Jam timer expires.

Hammer Jam is a limited-time opportunity. Focus on long upgrades, avoid unnecessary spending, and make sure your Builders are always working.

What's the first upgrade you're planning to start during Hammer Jam 2026?

🤔 Frequently Asked Questions About Hammer Jam

1. Does Hammer Jam reduce both upgrade time and cost?

Yes. Hammer Jam reduces eligible Home Village upgrade costs and times by 50%.

2. Does the Hammer Jam discount stack with the Gold Pass?

The Gold Pass time reduction stacks with Hammer Jam's time reduction. The cost reduction is separate.

3. Do upgrades started during Hammer Jam keep the discount after the event ends?

Yes. Eligible upgrades started while the event is active retain their reduced upgrade time even after Hammer Jam ends.

4. Are Walls included in Hammer Jam?

Yes. Wall upgrades receive the 50% cost reduction, making it a good time to spend excess Gold and Elixir.

5. Is it better to use Builder Potions or Hammers during Hammer Jam?

Builder Potions can offer better value because they speed up multiple active building upgrades. Hammers are less attractive when the event already provides significant discounts.