Hammer Jam is a classic Clash of Clans event that rarely takes place, so we're here to shed some light on how it works and when it usually occurs.
Hammer Jam is one of the most eagerly anticipated events in Clash of Clans. It's understandable because it allows players to make massive strides in constructing buildings and upgrading them.
More importantly, the Hammer Jam event is often a massive sign that can indicate Supercell's plans to add a new Town Hall level soon. This was true in the past six updates. Namely, these were Town Hall Levels 12, 13, 14, 15, 16, and 17. In each of these updates, the next Town Hall Level was introduced swiftly after the conclusion of the Hammer Jam event.
But with that said, let's dive into the specifics of how the Hammer Jam event works in Clash of Clans.
How the Hammer Jam Event Works in Clash of Clans
During the Hammer Jam event, players receive a 50% discount on all home village building and upgrade costs. Building and upgrade times also receive a 50% reduction in how long they take. Unfortunately, the Builder Base does not receive any of these discounts.
This event functionally serves as a way for players to save as many resources as possible when developing their Home Village. Needless to say, Hammer Jam is especially useful for players at extremely high Town Hall levels, as the cost of building and upgrading can be expensive.
When Is The Next Hammer Jam Event?
As mentioned earlier, the Hammer Jam event usually takes place in Clash of Clans before the launch of a new Town Hall level. As these updates come every 12 months or so, the event rarely takes place, and this contributes to its coveted reputation.
The discounts are rolling with Hammer Jam!
— Clash of Clans (@ClashofClans) November 3, 2025
Have you upgraded all your Walls yet, or are they still 5 levels behind? #hammerjam pic.twitter.com/mfsjdsXdhA
The next Hammer Jam event will take place between November 1 and 17, 2025.
After it comes to a close, players can expect the release of Town Hall 18 and its various new buildings, upgrades, troops, spells, features, and more.