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AFK Offline Income Calculator
Project Build a Base and Steal offline cash up to the 24-hour free cap or 72-hour Premium cap, with the 10/20/30 diminishing-returns bands.
Offline income optimizer · visible assumptions
AFK Offline Income
| Band | Range | Multiplier | Pets in band |
|---|---|---|---|
| 1 | 0–10 | ×1.00 | 9 |
| 2 | 11–20 | ×0.85 | 0 |
| 3 | 21–30 | ×0.70 | 0 |
| Pet | $/s | Band | Marginal $/h | |
|---|---|---|---|---|
| Swift Runner | 80.0 | 1 | 288,000 | in base |
| Cobra | 70.0 | 1 | 252,000 | in base |
| Cat | 60.0 | 1 | 216,000 | in base |
| Chicken | 50.0 | 1 | 180,000 | in base |
| Egg Mystery common | 30.0 | 1 | 108,000 | in base |
Premium-cap extra offline cash: 100,224,000
How the AFK Offline Income Calculator works
The AFK tool reads five caller-supplied values: total roster cash per second, the number of placed pets on the base, your current Rebirth tier, your permanent Luck multiplier, and the share of the cap horizon you actually spent offline. The engine multiplies them in this order:
- DR band multiplier — 1.00 / 0.85 / 0.70 / 0.55 by placed-pets band.
- Permanent Luck — typically 1.0× pre-Rebirth, scaling with each tier.
- Event multiplier — caller-supplied; leave at 1.0× if no event is active.
- Rebirth multiplier —
(1 + R)so R1 doubles your offline cash. - Cap hours × offline share — 24 hours free, 72 hours premium.
The result is the projected offline cash you’d collect on next login. The tool also renders a 24-hour sparkline so you can eyeball the cumulative curve without trusting the math blind.
What the Premium cap actually buys you
Build a Base and Steal does not currently publish a Premium Pass, so the Premium 72h cap is treated as a scenario field. The engine still tells you the extra offline cash you would earn if a Premium cap existed: that delta is the premium breakeven cash. Compare that number to whatever Robux price a future Premium Pass would carry — the tool deliberately avoids converting game cash into Robux because Roblox’s rate varies by region.
Reading the marginal $/hr ranking
The ranking table sorts your placed pets by marginal $/hr after the DR band multiplier. A pet at the bottom of the list is the one whose removal would hurt your effective cash the least. If that pet sits right above a band threshold, removing it lifts every other pet into the previous band (a “band up”) and is usually worth more than the pet itself.
Edge cases the tool handles
- Placed pets > 30: rejected (engine cap is 30).
- Empty roster: produces 0 cash without erroring.
- Premium breakeven 0: a tiny roster may earn the same offline cash under the free cap as under the premium cap; the tool surfaces this as a warning instead of misleading you.
- Negative roster cash/second: rejected.
- Overflow: rejected before it can corrupt the displayed currency.
Confidence and version
Source confidence: medium. The DR bands and the 24/72h cap structure are reported by Sportskeeda and ProGameGuides; the tool treats them as scenario inputs. Version 1.0.0 of this engine was checked 2026-07-31 against the verified sources and the official Roblox game description.