PAYBACK RULE
Compare the extra income, not the total.
If a building currently produces 20 units per minute and an upgrade raises it to 25, the improvement is 5 per minute. Dividing the price by 25 would wrongly credit the purchase for income you already had.
The basic rule is payback time = cost ÷ added net income per unit of time. Keep the units consistent: coins divided by coins per minute gives minutes. If an upgrade changes several resources, you cannot honestly combine them without deciding what those resources are worth for your current goal.
WORKED EXAMPLE
Work through two hypothetical choices.
Upgrade A costs 120 coins and adds 6 coins per minute. Its simple payback is 20 minutes. Upgrade B costs 200 and adds 8 per minute, so its payback is 25 minutes. If both affect the same unrestricted income stream and nothing else matters, A recovers its cost sooner.
Now suppose A adds upkeep of 2 coins per minute. Its net improvement is only 4, so payback becomes 30 minutes. B now has the shorter payback. These are illustrative numbers, not live Pocket Cult costs or a recommendation for a named building.
Use Pocket Cult’s building and minion decisions to practice comparing cost, upkeep and useful progress. Get Pocket Cult on Google Play →
LIMITS
Know when the formula stops answering the question.
- An unlock may enable a new production chain rather than add income directly.
- Defense can prevent losses even when it produces no currency.
- A storage or offline limit can prevent projected income from accumulating.
- A resource shortage may make the fastest nominal purchase irrelevant.
- Your session may end before a long payback becomes useful.
Use the calculation to clarify a choice, then check those constraints. It is a comparison of a simplified model, not a promise that every idle economy behaves as a fixed-interest account.
POCKET CULT CHOICES
Apply it carefully to dungeon management.
Pocket Cult includes buildings, minion upkeep and building affinities. Read the effects in your installed version, compare improvements in the resource currently holding you back, and consider defense before spending the whole reserve.
Where the game exposes enough information, estimate the net improvement and payback. Where it does not, make a small change and observe instead of inventing precision. The calculation is most helpful when it teaches you why a purchase helps, so the next choice becomes easier without copying someone else’s build.
05 · QUICK ANSWERS
Compare Idle-Game Upgrades by Payback Time, briefly.
For a pure income upgrade, divide its cost by the additional net income per unit of time, using consistent units.
No. Unlocks, defense, upkeep, resource bottlenecks and progression limits can matter more than a simple payback comparison.