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Known fee, unknown attack risk

Idle Mafia Game Bank Guide

Quick answer: keep only the Cash you are about to spend. Bank surplus Cash before logging off or entering risky PvP when protection is worth the visible 10% deposit fee, but avoid paying the fee repeatedly for tiny deposits. This is a strategy recommendation—not an official loss formula.

Deposit fee observed: 10%Banked Cash described as protectedCash on hand described as exposed
Researched by
IMGG Research Editor
Gameplay evidence
Public recording review — no first-person gameplay tester assigned
Published
Last updated
Last gameplay check
Evidence
Official · video-confirmed · calculator-derived
Editable strategy comparison

Bank fee vs. Cash-at-risk

Enter your exposed Cash and your own possible-loss assumption. The tool compares that assumption with the visible 10% deposit fee; it does not predict attacks.

Fee observed · risk editable
%
This is your scenario—not an official attack probability.
Known fee$1,000to deposit $10,000
Protected after fee
$9,000
Your loss scenario
$2,500
Cost difference
$1,500
Lower entered cost
Bank fee

Keep only Cash you are about to spend. Bank surplus before logging off or risky PvP when protection is worth the known fee, but avoid repeated tiny deposits by reflex.

Three worked cases

Use the next action to decide

$500 · buying nowKeep purchase Cash liquid

A 10% fee is $50. If the Property is available now and you are staying in a low-risk session, repeated deposit/withdraw cycles may only delay it.

$10,000 · logging offCompare $1,000 with the loss you refuse to accept

The fee is known. The attack chance is not; enter your own scenario above.

$30,000 · risky PvPSeparate spending Cash from surplus

Deposit only the amount you do not need for the next immediate action.

Many small Job rewardsBatch the decision

Do not treat every completion as a reason to pay another fee.

Before depositing

Four checks

  1. 01

    Read the live fee

    Confirm the current screen still says 10%.

  2. 02

    Reserve the next purchase

    Keep Cash you are about to spend on an unlocked Job, Property, or gear goal.

  3. 03

    Name the risk window

    Logging off and entering PvP are different from staying to buy immediately.

  4. 04

    Compare costs once

    Use the known fee and an editable loss scenario; do not pretend the tool predicts attackers.

Video-confirmedThe checked screen described a 10% deposit fee, protected banked Cash, and exposed Cash on hand. The recording does not establish attack probability.
Update history

What was rechecked

  1. Created the dedicated Bank guide and editable fee-versus-loss comparison.Visible Bank screen plus clearly labelled strategy
Straight answers

Bank FAQ

Is the Idle Mafia Game Bank fee worth it?

It depends on your next purchase and the exposed Cash you are unwilling to lose. The fee is a known 10% in the checked screen; attack risk and possible loss are not fixed by this guide.

When should I deposit Cash?

Consider depositing surplus before logging off or risky PvP. Keep near-term purchase Cash liquid when the repeated fee would delay the purchase.

Can other players steal banked Cash?

The checked Bank screen described banked Cash as protected and Cash on hand as exposed. Recheck the live wording after an update.