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Calcimator

Account Waterfall

Model how your income flows into different accounts. Set percentage-based allocations for bills, savings, investing, and discretionary spending.

Inputs

$
%
%
%
%

Results

Total Allocated

$5,000.00

≈ 5 smartphones

Remaining / Unallocated

$0.00

Bills Amount$2,500.00
Savings Amount$1,000.00
Investing Amount$500.00
Discretionary Amount$1,000.00
How to Use This Calculator
  1. Enter your total monthly take-home income after taxes.
  2. Set the percentage for Bills/Fixed Expenses — this covers rent, utilities, and insurance.
  3. Adjust the Savings and Investing percentages to match your financial goals.
  4. Set the Discretionary percentage for flexible spending like dining and entertainment.
  5. Review Bills Amount, Savings Amount, Investing Amount, and Discretionary Amount to confirm dollar allocations, then check Remaining to ensure percentages sum to 100%.

How the result changes with Monthly Income

Monthly IncomeTotal AllocatedRemaining / Unallocated
$10,000.00$10,000.00$0.00
$35,000.00$35,000.00$0.00
$65,000.00$65,000.00$0.00
$90,000.00$90,000.00$0.00

What each input means

Monthly Income
Total monthly take-home income after taxes
Bills / Fixed Expenses
Percentage allocated to rent, utilities, insurance, and other fixed costs
Savings
Percentage routed to savings accounts (emergency fund, goals)
Investing
Percentage directed to investment accounts (brokerage, retirement)
Discretionary
Percentage for flexible spending like dining, entertainment, hobbies

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Monthly Income = 5000, Bills / Fixed Expenses = 50, Savings = 20, Investing = 10 = 5 input(s) provided
  2. Calculate Total Allocated
    Total Allocated
    5000 = $5,000
  3. Calculate Remaining / Unallocated
    Remaining / Unallocated
    0 = $0
  4. Calculate Bills Amount
    Bills Amount
    2500 = $2,500
  5. Calculate Savings Amount
    Savings Amount
    1000 = $1,000

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

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