Passive Income
How black holes generate cash every second - even while you're offline - and how to maximize your earnings.
Overview
Every black hole on your base generates cash every second, including while you are offline. Higher-tier holes produce far more cash, which is why climbing the merge chain directly grows your passive income.
How Passive Income Scales
Cash per second is tied to the tier of each hole. A single Quasar or Omega Hole generates vastly more than dozens of low-tier holes combined.
Because income compounds with every merge, building upward is always more efficient than hoarding weak holes. Your goal is a steady climb up the tiers.
Offline earnings mean you progress even when not playing, but they also make your holes a target - always protect them with the base shield.
Ways to Boost Cash Income
Methods to multiply your passive earnings.
Stack these during active play for maximum effect.
| Method | Effect |
|---|---|
| Merge to higher tiers | Exponential cash increase |
| 2x Cash boost | Double income for a time |
| 4x Cash boost | Quadruple income for a time |
| Cash gamepass | Permanent multiplier |
Maximizing Offline Earnings
Three principles for getting the most cash while away.
Strong defense ensures your income keeps flowing uninterrupted.
Hold High Tiers
Keep your strongest late-tier holes on base for maximum offline cash.
Defend Before Leaving
Activate your shield so raids don't destroy your earners.
Protect the Best
Use best-hole protection on your top income hole.
Income Tips
Quick ways to grow your cash flow.
Small income optimizations compound across long sessions.
- Redeem codes for free cash to kickstart your income engine.
- Use Star Shop boosts during active merge sessions.
- Read the money-making guide for a full cash strategy.
Building a Strong Income Engine
A reliable path to a self-sustaining cash flow.
Each phase removes an income bottleneck.
Once your engine is strong, cash stops being a limit on progression.
Merge Past Early Tiers
Climb beyond the early tiers for a real income base.
Reach the Quasar
Hit the Quasar power spike for a steep income jump.
Stack Boosts
Use 2x and 4x cash boosts during active play.
Defend Your Engine
Protect your earners with the base shield and protection.