Roller +50% speed Best
60 to 90 keys/min - cost $2.5K
6.7 min
payback
Last updated 2026-06-27
Paint My Keyboard Calculator
This Paint My Keyboard calculator compares every candidate upgrade by payback time. Enter your current roller speed, cash per key, and paint tier, and the tool shows which purchase recovers its cost fastest, whether that is a new roller, the next paint unlock, or a keyboard expansion.
Run the planner
Update the upgrade costs on the left whenever the in-game price changes. Roller and expansion costs scale as you progress, so fresh numbers give more accurate rankings.
Your current setup
Unlock Neon
paint x2.5 to x6 - cost $12.0K
11.4 min
payback
Expand keyboard +30%
+30% cash captured per key - cost $8.0K
35.6 min
payback
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Key Takeaways
- Income per minute = roller speed x cash per key x paint multiplier. That formula determines every upgrade decision.
- The calculator ranks roller upgrades, paint unlocks, and keyboard expansion by payback time so you spend on the fastest win, not the biggest number.
- A $12K paint unlock can beat a $2.5K roller upgrade in payback time if the multiplier jump is large enough. Run the numbers first.
How the calculator works
Every upgrade improves one of three variables. The roller determines how many keys get painted each minute. The paint tier sets the cash multiplier applied to each painted key. Keyboard expansion adds more surface for the roller to cover, which raises the effective cash per key.
After you enter your setup, the tool simulates each upgrade, computes the new income per minute, and divides the upgrade cost by the income delta. That ratio is payback time. The upgrade with the shortest payback is the best buy right now.
For context on which paint tier is worth saving for, the best paints comparison ranks all six tiers by multiplier efficiency. For a step-by-step priority route, see the upgrade order guide.
Reading the results
The dark banner shows your current income and the single best purchase. Each upgrade card below has a bar that shows payback relative to the slowest option: a longer bar means a faster payback. The green outline marks the recommended buy.
Payback time is a rate, not a balance check. If the top pick costs more than you have right now, keep farming until you can afford it rather than settling for the second option. The ranking updates the moment you change any input.
Once you settle on a setup, use the share tool to save and post your build, or check the paint tier list to confirm which tier you are saving toward.
Where the numbers get fuzzy
The ranking assumes you buy one upgrade at a time and immediately reinvest the extra income. In practice, cash keeps piling up while you are away from the keyboard, so a 40 minute payback estimate can take longer in wall-clock time if you check in less often.
The planner also does not know about rebirth. Rebirth resets your roller speed and paint tier in exchange for a permanent multiplier, so a purchase that pays back in 20 minutes might not be worth buying if you are about to rebirth anyway. Run your numbers on the rebirth calculator before a big-ticket upgrade if a rebirth is close.