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Calcimator

Overdraft Prevention

Calculate the minimum checking account balance you should maintain to avoid overdraft fees. Factor in pay timing, bills, and daily spending.

Inputs

$
$
$
$

Results

Minimum Safe Balance

$2,200.00

≈ 17 pairs of sneakers

Recommended Buffer

$2,750.00

≈ 21 pairs of sneakers

Worst-Case Daily Balance$223.81
Annual Overdraft Fees Saved$420.00
How to Use This Calculator
  1. Enter your monthly income, total monthly bills, and your largest single bill.
  2. Set the number of days between paychecks and your average daily variable spending.
  3. Review Minimum Safe Balance — keep this amount in checking at all times as your floor.
  4. Check Worst-Case Daily Balance to find the riskiest day in your billing cycle.
  5. Use Recommended Buffer to set a low-balance alert on your bank account and avoid overdraft fees.

How the result changes with Largest Single Bill

Largest Single BillMinimum Safe BalanceRecommended Buffer
$2,000.00$2,700.00$3,375.00
$7,000.00$7,700.00$9,625.00
$13,000.00$13,700.00$17,125.00
$18,000.00$18,700.00$23,375.00

What each input means

Monthly Income
Total monthly take-home pay deposited to checking
Total Monthly Bills
Sum of all recurring monthly bills withdrawn from checking
Largest Single Bill
Your biggest single monthly charge (often rent or mortgage)
Days Between Paychecks
Number of days between each paycheck deposit
Average Daily Spending
Typical daily debit/card spending on food, gas, errands

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Monthly Income = 5000, Total Monthly Bills = 2500, Largest Single Bill = 1500, Days Between Paychecks = 14 = 5 input(s) provided
  2. Calculate Minimum Safe Balance
    Minimum Safe Balance
    2200 = $2,200
  3. Calculate Recommended Buffer
    Recommended Buffer
    2750 = $2,750
  4. Calculate Worst-Case Daily Balance
    Worst-Case Daily Balance
    223.81 = $223.81
  5. Calculate Annual Overdraft Fees Saved
    Annual Overdraft Fees Saved
    420 = $420

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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