How the cash economy works: what the codes document, how run income is computed, and the spending order that compounds — every number dated.
Run income = waves cleared × kills per wave × your cash per kill. The official description confirms the loop in one line — earn cash and upgrade your build — and the only fixed cash values the game has ever published arrived through codes: 500 (CashDrop), 1,000 (COMMUNITY, plus a Small Engine and Small Tank), and 5,000 (IAMPRO, gated behind a 1,000-stud best distance). Everything else is measured. Play one run, divide cash earned by kills, and you have the rate the whole cash calculator runs on. Checked 2026-10-03.
Code rewards are developer-set fixed values, collected from named trackers — the strongest public anchors the economy has. Checked 2026-10-03.
| Code | Documented reward | What it anchors | Source |
|---|---|---|---|
| IAMPRO | 5,000 Cash | Requires a 1,000-stud best distance — the distance stat gates rewards | GamesRadar |
| COMMUNITY | 1,000 Cash + Small Engine + Small Tank | Engine and tank are named car parts — upgrade families exist by size tier | Eurogamer, TechWiser |
| CashDrop | 500 Cash | A no-requirement baseline payout | PCGamesN, Pro Game Guides, Destructoid |
| PAINTEVERYWHERE (expired) | 1,000 Cash + Crossbow + Mounted Gun | Crossbow and Mounted Gun are named weapons — a weapon catalog exists | IGN, Pocket Tactics |
Sources: the codes page collects every listing with its status and checked date; the reward names above come from the trackers listed on the sources page.
Runs needed = goal ÷ per-run income. Three example paces: a fresh account (600 Cash/run), a mid-game build (2,880), and a strong farm setup (5,000).
| Goal (Cash) | 600/run | 2,880/run | 5,000/run |
|---|---|---|---|
| 2,000 — early weapon tier | 4 | 1 | 1 |
| 10,000 — mid rebuild | 17 | 4 | 2 |
| 25,000 — record-push fund | 42 | 9 | 5 |
| 50,000 — long-project reserve | 84 | 18 | 10 |
Example paces come from the run formula at documented-default inputs (10 waves × 30 kills × 10 Cash per kill = 3,000, trimmed to 2,880 at 8 waves × 40 kills × 9) — substitute your own measured rate before planning. Whole runs only: a failed deep run earns less than a finished safe one.
The fixed rewards codes pay. Tracker-listed codes handed out 500 Cash (CashDrop), 1,000 Cash plus a Small Engine and Small Tank (COMMUNITY), and 5,000 Cash (IAMPRO, which requires a best distance of 1,000 studs). Everything else — cash per zombie, upgrade prices — you measure from your own runs.
Divide the upgrade's price by your per-run income (waves × kills per wave × cash per kill). At 2,880 Cash per run, an upgrade priced like four runs costs about 11,500 Cash — four focused sessions. The cash calculator does this division for you with your own inputs.
No — they seed it. Even the largest listed code (5,000 Cash) is worth less than two runs at a mid-game income, but on a fresh account codes cover the first weapons entirely. Claim them first, then farm; the codes page keeps the current list with checked dates.
Two documented reasons: wave depth and weapon coverage. Deeper waves pay more per kill as difficulty rises, and funneling defenses push more zombies into weapon range — so the same car earns different rates at wave 5 and wave 15. Re-estimate whenever either changes.
No cash cap or offline income has been announced by the developer, and income tracks combat — kills and wave progress — so the practical ceiling is the highest wave band your build clears comfortably. Plan around runs you finish, not runs you idle through.
