The short answer
A first idle game can start from $999 on our current launch pricing, and typical 2026 market ranges are $5,000 to $30,000 for a simple 2D clicker, $30,000 to $80,000 for a casual 3D tycoon and $80,000 to $150,000 for a full 3D tycoon with deep monetisation. Unlike puzzle games, where levels drive the cost, idle and tycoon budgets go mostly into the economy: the maths behind costs, production, prestige and offline earnings, and the time it takes to tune them before and after launch.
Why idle games are harder than they look
Kongregate's Anthony Pecorella described idle games as a seesaw between production rates and costs. In his widely cited "Math of Idle Games" series, costs typically grow exponentially with each purchase, while production grows linearly or polynomially, so players hit walls that upgrades and multipliers push back. His worked example from AdVenture Capitalist uses a cost growth rate of 1.07 per lemonade stand. Small changes to numbers like that reshape hours of play, which is why the economy, not the art, is the expensive part.
The systems you are paying for
Generators, upgrades and multipliers
The core: things that produce currency, things that make them produce faster, and the cost curves that pace it all. Teams model these in spreadsheets or simulation tools first, so one parameter change updates every cost.
Prestige
A reset that wipes progress in exchange for a permanent bonus, so the next run goes faster. Games calculate the reward differently, for example from lifetime earnings or earnings since the last reset. Prestige is what turns a few days of play into months, and it needs the most balancing.
Offline progress
Players expect to earn while away. That means saving a timestamp when the app pauses (Unity's OnApplicationPause is the usual hook), calculating earnings on return, protecting against clock changes, and deciding on a cap. Designs vary: Pecorella noted that, at the time, Egg, Inc. capped offline earnings at two hours while Clicker Heroes had no limit.
Very big numbers
Idle numbers outgrow normal data types. A C# double tops out around 1.8 × 10308, and many idle games pass that. Libraries such as BreakInfinity.cs provide a number type for values far beyond it, trading some precision for speed. Formatting those numbers readably on screen is its own small design job.
The tycoon layer
Tycoon games add a visible world: managers, upgradable buildings, areas to unlock and often 3D scenes. That adds art, animation and performance work on top of the economy. Our Animal Shelter: 3D Safari Zoo case study, a Unity management sim with a build-and-upgrade loop and a balanced soft economy, shows the kind of scope involved.
Monetisation built into the economy
Idle games are well suited to rewarded ads because players constantly want more income. Unity's monetisation guidance gives the classic example of a home-screen video that doubles income for a few hours, with developers capping how much boost can stack. Returning players are often offered an ad to double what they earned offline. These must be opt-in: AdMob's policy requires a clear choice, a disclosed reward and no penalty for skipping.
In-app purchases usually sell permanent multipliers, managers, time skips and premium currency. Apple's guidelines require in-game currency to be sold through in-app purchase and say purchased currency may not expire. Our guide to ads vs in-app purchases covers the balance.
Tuning after launch
No spreadsheet survives real players. Plan to retune costs, rewards and ad placements using live data. Firebase Remote Config changes values without an app update and supports A/B tests, and analytics should track where players stall, when they prestige and when they quit. Budget for several tuning rounds in the first months.
Realistic budgets
| Scope | What you get | Typical cost |
|---|---|---|
| Prototype | Core loop, a few generators, placeholder art, to test the feel | Commonly $1,000–$4,000 |
| Simple 2D clicker | Generators, upgrades, prestige, offline progress, ads | From $999 (Spark); market $5K–$30K |
| Casual 3D tycoon | Visible world, managers, unlockable areas, ads and IAP | From $2,999 (Launch); market $30K–$80K |
| Full 3D tycoon | Several worlds, events, deep economy, LiveOps | Market $80K–$150K |
Starting prices are our current launch packages; the market ranges come from our game development cost guide.
How to start
Model the economy before building anything, prototype the first 30 minutes of play, and test whether people return the next day. Then expand the world and the prestige layers. We build idle and tycoon games in Unity; see mobile game development, or compare budgets with our puzzle game cost guide.
Sources: Game Developer: The Math of Idle Games, Part I · Game Developer: The Math of Idle Games, Part III · Microsoft: C# floating-point types · BreakInfinity.cs · Unity: rewarded video monetisation · AdMob: rewarded ads policy · Firebase Remote Config. Checked October 14, 2026.
Related: Mobile game development · Game cost guide · Ads vs IAP
Originally published on A Plus Games Studio, a game, AR and VR development studio in Sacramento, CA.
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