Pick a brainrot’s base income, add a mutation and any traits, and this shows what it earns per second, per hour and per day, plus how long a cash goal takes. It uses the formula the community sources publish:
income per second = base income x (mutation + every trait added together)
That is an additive formula, which is unusual for this genre and is the single most common reason a player’s own maths comes out wrong. A Rainbow mutation (10x) plus a Fire trait (+5) is 15x, not 50x.
Shorthand works: K, M, B, T, Qa. Trait bonuses are added to the mutation value, not multiplied by it. Rebirth multipliers are not included here: each rebirth adds one to your money multiplier, so multiply the result by your rebirth count + 1.
Why the plus sign changes everything
Most Roblox simulators multiply their modifiers: a 2x and a 3x make 6x. Steal a Brainrot adds them. The published example is explicit: a Rainbow brainrot (10x) with a Fire trait (+5) earns 15x its base, not 50x.
That produces two rules, and the first one is where players get it backwards.
A trait is worth 5x your base income in dollars, whatever mutation the unit has. Because the terms add, a +5 trait adds exactly five units of base income per second. It does not care whether the unit is Normal or Rainbow.
| Unit base income | What one +5 trait adds per day |
|---|---|
| $1/s (a starting Common) | +$432K |
| $1.7K/s (top of the Common band) | +$734M |
| $250M/s (Arca Bros) | +$108T |
| $1B/s (Spyder Elephant) | +$432T |
So a trait on a cheap unit is a big percentage and almost no money. The percentage is the number that looks impressive in a video; the dollars are the number that buys your next rebirth.
Stack every modifier on your best unit. Because the terms add, moving a trait from a $100M unit to a $250M unit gains you $750M/s and costs the $100M unit nothing but its own base rate. With a fixed pool of traits, putting all of them on the highest-base unit always wins:
- 15x on one $250M unit: $3.75B/s
- 10x on the $250M unit and 6x on a $100M unit: $3.1B/s
The same logic is why a Rainbow is worth more the later you get it. Ten extra multiplier on a Common is noise; ten extra on an OG is a different game.
Highest income brainrots
From the community values list, which covers the OG and Secret tiers. Base income, before any mutation or trait.
| Brainrot | Rarity | Base $/s |
|---|---|---|
| Spyder Elephant | OG | $1.0B |
| Strawberry Elephant | OG | $750M |
| Meowl | OG | $600M |
| Headless Horseman | OG | $550M |
| John Pork | OG | $500M |
| Skibidi Toilet | OG | $450M |
| Los Dragons | Secret | $425M |
| Phoenix | Secret | $425M |
| Griffin | Secret | $400M |
| Dragon Aquanini | Secret | $375M |
| Hydra Dragon Cannelloni | Secret | $350M |
| Dragon Skeletonini | Secret | $325M |
| Dragon Gingerini | Secret | $300M |
| Plant Bros | Secret | $300M |
| Arca Bros | Secret | $250M |
| Dragon Cannelloni | Secret | $250M |
| Moby Bros | Secret | $225M |
| Hydra Serpent | Secret | $220M |
| Digi Narwhal | Secret | $200M |
| Kraken | Secret | $200M |
The gap between the top OG and the bottom of this list is only 10x, which is much flatter than the price gap suggests. That is the same lesson as the trait maths: in this game the multipliers do most of the work, not the unit.
Price bands, for planning a floor
| Rarity | Price off the carpet |
|---|---|
| Common | $25 to $1.7K |
| Rare | $2K to $9.7K |
| Epic | $10K to $47.5K |
Higher rarities are priced per unit rather than in bands, so the calculator is the only reliable way to compare a Mythic you can afford against two Epics you already own.
Assumptions and limits
- No rebirth multiplier. Each rebirth adds one to your money multiplier permanently. If you are at rebirth 5, multiply these numbers by 6.
- Traits are additive with the mutation. That is the published formula, and it is unusual enough that it may be patched. If your in-game card disagrees, trust the card. The full mutation and trait values are on the traits page.
- Sleepy halves the final total. It is the only trait that multiplies instead of adding, so it is a checkbox here rather than a number.
- Traits can only be gained on the carpet. Once a brainrot is home it cannot pick up a new trait, so a trait you are planning around has to be won before the unit walks.
- Floor income assumes every unit is placed. Units on your floor earn; units you are carrying do not, and you move 41% slower while carrying one.
- Base income only. Stealing does not multiply income, it just moves a unit from someone else’s floor to yours.
- The values list covers OG and Secret. Lower rarities are priced in bands, and their individual incomes are not in the same published list.
Sources & last checked
Last checked: November 9, 2026.
- steal-brainrot.co - the income formula, Rainbow 10x, Fire +5, the 15x worked example, price bands
- steal-a-brainrot.org brainrots - OG and Secret base incomes
- steal-a-brainrot.org calculator - cross-check on mutation, trait and rebirth multipliers
Frequently asked questions
How is income calculated in Steal a Brainrot?
Base income x (mutation + every trait added together). The plus sign matters: a Rainbow brainrot is 10x and a Fire trait is +5, so together they are 15x, not 50x.
Why does my brainrot earn more than the calculator says?
Check whether a rebirth multiplier is active. Each rebirth adds one to your money multiplier permanently, and this calculator shows raw unit income before that bonus.
What is the highest income brainrot in Steal a Brainrot?
Spyder Elephant, an OG, at $1.0B/s. Strawberry Elephant is second at $750M/s and Meowl third at $600M/s, according to the community values list.
Is a trait better than a mutation in Steal a Brainrot?
Not in dollars. Because the formula adds, a +5 trait adds five times the unit’s base income per second wherever it goes, so it pays the same on a Rainbow as on a Normal unit of the same base. The percentage looks bigger on the Normal unit, the money does not. A Rainbow itself is worth far more because it adds ten units of base income.