Updated for Town Hall 18 (October 2026).
The Builder Base Gold Mine produces Builder Gold around the clock, from 1,000 an hour at level 1 to 4,500 an hour at level 10. Every level fills up in exactly 24 hours, so one tap a day collects everything. You start with one, get a second at Builder Hall 6 and a third at Builder Hall 8, and upgrades are paid in Builder Elixir.
How the Gold Mine works
The mine pulls Builder Gold from an endless reserve and holds it until you tap it. The gold then moves into your Gold Storages and the Builder Hall. A few rules to know:
- Once a mine is full, it stops producing until you collect. Since every level holds exactly one day of output, collect at least once every 24 hours.
- Starting an upgrade collects whatever the mine is holding. If your storages are already full, that gold is lost, so spend or make room first.
- A mine produces nothing while it is upgrading.
- Gold sitting in a Builder Base mine is never at risk. In Builder Base 2.0, attackers do not steal any loot at all.
- The Clock Tower boost speeds up production 10 times while it runs.
The Gold Mine is a 3×3 building. It is one of the ruined buildings you find when you first reach the Builder Base, and it is repaired during the tutorial when the Builder Hall goes to level 2.
Gold Mine levels
| Level | Builder Hall needed | Production per hour | Capacity (one day) | Hitpoints | Upgrade cost (Builder Elixir) | Upgrade time |
|---|---|---|---|---|---|---|
| 1 | 1 | 1,000 | 24,000 | 300 | 1,000 | 10m |
| 2 | 3 | 1,200 | 28,800 | 350 | 5,000 | 20m |
| 3 | 3 | 1,500 | 36,000 | 400 | 10,000 | 40m |
| 4 | 4 | 1,800 | 43,200 | 460 | 30,000 | 2h |
| 5 | 5 | 2,100 | 50,400 | 550 | 60,000 | 6h |
| 6 | 6 | 2,500 | 60,000 | 650 | 100,000 | 1d |
| 7 | 7 | 3,000 | 72,000 | 750 | 200,000 | 1d 12h |
| 8 | 8 | 3,500 | 84,000 | 850 | 300,000 | 2d |
| 9 | 9 | 4,000 | 96,000 | 1,000 | 400,000 | 2d 12h |
| 10 | 10 | 4,500 | 108,000 | 1,150 | 800,000 | 3d |
Three level 10 mines bring in 324,000 Builder Gold a day. The Elixir Collector has the same costs and build times at every level, so the two are easy to upgrade in pairs.
How many Gold Mines you get, and on which stage
- Builder Hall 1 to 5: one Gold Mine.
- Builder Hall 6 and 7: two, one on each stage. Stage 2 comes with a level 1 Gold Mine already built when it opens.
- Builder Hall 8 to 10: three, one on Stage 1 and two on Stage 2.
Resource buildings have fixed spots per stage, so you do not choose which stage a mine goes on. You do choose where on the stage it sits. A Gold Mine has low hitpoints and holds nothing an attacker can take, so it makes good filler near the edge of the stage, where it can soak up a few seconds of an attack.
Is it worth upgrading?
The Gold Mine is cheap compared with Builder Base defenses, and the costs come out of Builder Elixir rather than Builder Gold. Catch-up figures show how long each upgrade takes to make up the gold lost while the mine is offline: 1 hour 40 minutes for level 2, rising to 24 days for level 10. Upgrade them when a builder would otherwise sit idle, ideally with the Clock Tower running.
Mines are no longer the only steady income. Since Builder Base 2.0, every attack you make earns Builder Gold, plus a Star Bonus once you collect enough stars, and Supercell raised Builder Base battle rewards for almost all leagues on March 24, 2025. Defenses pay out Builder Elixir through the Elixir Cart instead.
Gold Mine changes
- May 22, 2017: added with the Builder Base, with 5 levels and two mines.
- March 5, 2018: third Gold Mine added at Builder Hall 8, along with level 8.
- October 16, 2019: capacity doubled, so mines fill in 24 hours instead of 12.
- May 15, 2023 (Builder Base 2.0): level 10 added; mines split across the two stages.
Looking for the Home Village version? See the Home Village Gold Mine. For everything else that changed in 2.0, read the Builder Base guide.
Gold Mine FAQ
How long does a Builder Base Gold Mine take to fill?
24 hours at every level.
Can attackers steal gold from Builder Base mines?
No. Builder Base battles do not take loot from the defender.
What do Builder Base Gold Mine upgrades cost?
Builder Elixir: from 5,000 for level 2 up to 800,000 for level 10.
Sources: Supercell release notes (Builder Base 2.0 full patch notes (Supercell, May 15, 2023)) and in-game data.
