- Money per sec upgrades are the core income system for every animal in your lineup
- Tier matters first: upgrade rare and legendary animals before common ones
- Rebirth multipliers stack with per-level income, making early upgrades compound
- AFK farming setups pair upgraded animals with defense pets for overnight income
- Avoid sunk cost: never pour coins into D-tier animals like Chicken or Rabbit
How Money Per Sec Upgrades Work in Steal an Animal Egg
Every animal you hatch in Steal an Animal Egg generates passive income measured in money per second. Each animal has a base income value set by its rarity tier, and you can raise that value by spending coins on individual level upgrades. The higher the animal's level, the more it earns every second — but upgrade costs also scale upward with each level.
The system follows a simple loop: hatch animals, upgrade the best earners, let them farm coins, and reinvest those coins into more upgrades. Over time this compounds, especially once rebirth multipliers enter the picture.
| Animal | Tier | Base Income Role | Upgrade Priority |
|---|---|---|---|
| Chicken | D | Lowest money per sec | Skip entirely |
| Rabbit | C | Low income, quick early boost | Only pre-mid game |
| Wolf | B | Balanced income and stats | Solid early investment |
| Tiger | A | High income, strong steal speed | High priority |
| Eagle | A | Strong income plus fastest carry | High priority |
| Dragon | S | Top income and defense | Best long-term target |
Rarity almost always beats level. A level 1 Dragon typically out-earns a fully upgraded Chicken. Always funnel coins into your highest-rarity animal first.
Upgrade Scaling and Cost Efficiency
Upgrade costs rise with each level while income gains stay relatively linear. That means early levels are extremely cost-efficient — the first 10-15 levels of any animal usually pay for themselves quickly — while levels beyond a certain point give diminishing returns per coin spent.
The practical takeaway: spread cheap early levels across several decent animals, then concentrate your big spending on one or two top-tier earners rather than maxing everything evenly.
| Upgrade Stage | Cost Level | Income Gain | Recommended Action |
|---|---|---|---|
| Levels 1-10 | Very low | Strong early boost | Buy immediately on any B-tier or above |
| Levels 10-25 | Moderate | Steady scaling | Focus on your best 2-3 animals |
| Levels 25-50 | High | Slowing returns | Only for A/S-tier animals |
| Levels 50+ | Very high | Marginal per coin | Only when coin income is overflowing |
Do not upgrade Rabbit or Chicken past the early game. The coins you spend there are effectively lost — the same amount invested in a Wolf or Tiger upgrade returns several times more money per sec.
Step-by-Step: Maximizing Money Per Sec
Follow this progression order to build the strongest income engine without wasting coins.
Hatch and Identify Your Best Earner
Complete the tutorial, hatch your starter egg, then work toward Common and Premium eggs. As soon as a B-tier or higher animal appears, make it your primary upgrade target.
Push Early Levels Fast
Spend freely on levels 1-15 for your best animal. These levels are the cheapest and most efficient income boosts in the entire game.
Stack Pet Multipliers
Equip pets with egg production and egg value boosts (Fox, Wolf, Owl, and legendary pets like Dragon or Phoenix). Multipliers apply on top of your upgraded money per sec.
Rebirth at the Right Time
Once your income growth plateaus, rebirth. The permanent multiplier (roughly x1.5-x2 on the first rebirth) multiplies every money-per-sec upgrade you already own.
Reinvest Into Higher Tiers
After rebirthing, target Rare Eggs for Tiger, Eagle, and Dragon hatches, and funnel your boosted income into their upgrade levels.
Because rebirth multipliers stack with animal level income, an upgraded A-tier animal after Rebirth 2-3 can out-earn an entire pre-rebirth lineup. Reinvesting quickly is the fastest path to high money per sec.
Best Income Strategies Compared
Different playstyles benefit from different upgrade strategies. Here are the three proven approaches:
AFK Farming Build
- Focus: Money per sec and egg value pets
- Upgrade 2-3 income animals evenly
- Equip production-boost pets
- Park character inside trap perimeter
- Best for overnight sessions
Active Stealing Build
- Focus: Speed and steal chance pets
- Upgrade one main earner only
- Steal Premium and Rare eggs from rivals
- Hatch better animals instead of leveling
- Best for high-traffic servers
Defense-First Build
- Focus: Base HP and trap effectiveness
- Maintain moderate upgrade levels
- Protect accumulated egg stockpile
- Swap in defense pets when online
- Best for players with valuable eggs
| Strategy | Income Speed | Risk Level | Coin Usage |
|---|---|---|---|
| AFK Farming | Steady, passive | Low | Mostly upgrades |
| Active Stealing | Fast but variable | High | Mostly eggs and slots |
| Defense-First | Moderate | Low | Split upgrades and walls |
Most experienced players run the AFK build overnight, then swap to the stealing build during active hours. Keep at least one well-upgraded income animal regardless of which build you use.
Income Upgrade Checklist
Run through this checklist before every long farming session to make sure your money per sec setup is fully optimized:
Money Per Sec Optimization:
- Highest-rarity animal is your top upgrade target
- All B-tier and above animals are at least level 10
- Production and egg value pets are equipped
- Nest defense is strong enough to protect your stockpile
- Rebirth completed once income growth plateaus
FAQ
Q: How do I upgrade money per sec of an animal in Steal an Animal Egg?
Interact with an animal in your base or lineup menu and spend coins on its level upgrades. Each level permanently increases that animal's money per sec, with costs rising per level. Prioritize your highest-rarity animals since their base income is far higher than common animals.
Q: Should I upgrade one animal fully or spread upgrades across many?
Buy the cheap early levels (1-15) on every B-tier or better animal, then concentrate larger spending on your single best earner. Level 50+ upgrades have diminishing returns and are only worth it when your coin income is already overflowing.
Q: Does rebirthing reset my animal upgrades?
Animals obtained through hatching generally stay with you through rebirth, but some base-tied bonuses may reset. The permanent income multiplier you gain from rebirthing typically outweighs any losses, so rebirthing when growth slows is still the right call.
Q: Which animals are worth upgrading for money per sec?
Wolf is the best early investment, Tiger and Eagle are excellent mid-game earners, and Dragon is the top long-term target thanks to its high base income and strong defense stats. Avoid putting coins into Chicken or Rabbit beyond the earliest stages.