How long until the next upgrade?

Set your income and upgrade cost to see how long a player needs to wait.

Starting moneyMoney the player already has.

Income per minuteMoney earned each minute while waiting.

Upgrade costThe price of the next upgrade.

WAITING TIME

Your player can afford this upgrade in 5 minutes.

600 to earn at 120 per minute.

Assumes steady income and no spending while waiting. This is a timing check, not a guarantee of game balance.

See the calculation

max(0, upgrade cost − starting money) ÷ income per minute

600 ÷ 120 = 5 minutes

Have a waiting time in mind?

Choose a target to work backwards to an upgrade cost.

Target waiting time · minutes, optional

Your suggested cost will appear here.

Advanced simulation

Model repeated purchases, growing production and player choices.

Scenario settings

01 / INPUTS

Scenario name

Starting balance · creditsPassive income · credits/s

Simulation durationPlayer strategy

Waits for the producer that earns back its price fastest, buys it, then chooses again.

Producers

3 / 6

List order breaks ties and sets purchase priority. Production is per owned unit, in credits/s.

01 Miner1 owned

Producer name

Starting unitsBase cost · creditsCost growth factorUnit production · credits/s

02 Drill0 owned

Producer name

Starting unitsBase cost · creditsCost growth factorUnit production · credits/s

03 Refinery0 owned

Producer name

Starting unitsBase cost · creditsCost growth factorUnit production · credits/s

Goals & advanced details

Shortest payback: minimizes cost / added production. Waits for that specific producer, even when another is affordable. This local heuristic is not a global optimum.

Blank goals are disabled. Balance goals count pre-purchase balances, even if spent immediately.

Balance goal · creditsProduction goal · credits/s

Next cost = base cost × growth factor ^ owned units. Starting units already affect cost. Income = passive income + Σ (units × production). Purchases are instant, with no cooldown, rounding, offline cap, or human delay. Zero-production units are skipped by Shortest payback.

Single currency: credits. Limits: 7 days, 20,000 purchases, magnitude 1e15. Reaching a limit marks the run incomplete.

Save, load & exchange scenarios

Named scenarios stay only in this browser. Up to 20 saved scenarios; saving the same name replaces it.

No saved scenarios yet.

02 / OBSERVATIONS

Your economy over time.

Inputs match this run

First purchase5 minutesFirst producer bought

Money target10.56 minutesSave 1,000 credits

Income target37.66 minutesReach 10 credits/s

Assumes continuous income and instant purchases using the selected strategy. Player timing may differ.

Balance & earned income

credits

━ Current · Balance┄ Current · Earned

Inspect sampled time

Exact purchase jumps; straight segments integrate constant production. The time inspector uses 361 samples.

Production rate

credits / second

━ Current · Production

Inspect sampled time

Exact purchase jumps; straight segments integrate constant production. The time inspector uses 361 samples.

Run summary

3,600 s horizon

Metric	Current · Mining Outpost
Final balance · credits	2,455.94
Total earned · credits	39.3K
Total spent · credits	36.8K
Final production · credits/s	31
First purchase	300 s
Total purchases	9
Balance goal reached	633.33 s
Production goal reached	2,259.52 s

Purchase ledger

Exact events · 25 per page

Time · s	Producer	Cost · credits	New rate · credits/s
300	Miner	600	3
966.67	Drill	2,000	6
1,116.67	Miner	900	7
2,259.52	Refinery	8,000	15
2,472.86	Drill	3,200	18
2,547.86	Miner	1,350	19
3,263.65	Refinery	13.6K	27
3,453.28	Drill	5,120	30
3,520.78	Miner	2,025	31

Page 1 / 1 · 9 purchases

Full result values

Current · Mining Outpost

{
  "time": 3600,
  "balance": 2455.9363686995384,
  "totalEarned": 39250.936368699535,
  "totalSpent": 36795,
  "incomePerSecond": 31,
  "firstPurchaseSeconds": 300,
  "balanceGoalSeconds": 633.3333333333333,
  "incomeGoalSeconds": 2259.523809523809
}

Inputs used for these results

{
  "version": 1,
  "scenario": {
    "name": "Mining Outpost",
    "balance": 0,
    "passiveIncome": 1,
    "duration": 3600,
    "strategy": "payback",
    "balanceGoal": 1000,
    "incomeGoal": 10,
    "producers": [
      {
        "id": "miner",
        "name": "Miner",
        "owned": 1,
        "baseCost": 400,
        "growthFactor": 1.5,
        "production": 1
      },
      {
        "id": "drill",
        "name": "Drill",
        "owned": 0,
        "baseCost": 2000,
        "growthFactor": 1.6,
        "production": 3
      },
      {
        "id": "refinery",
        "name": "Refinery",
        "owned": 0,
        "baseCost": 8000,
        "growthFactor": 1.7,
        "production": 8
      }
    ]
  }
}

Need income that grows after each purchase? Advanced simulation adds producers, strategies and comparisons.