Avoid double counting
Count each amount once.
If an investment contribution is deducted before the income reaches your bank account, add it to both the after-tax income denominator and the investment-contribution input or exclude it from both.
Saving behaviour calculator
Savings Rate Calculator
Measure how much after-tax income goes to cash savings, investments and extra debt principal under one consistent monthly method.
Personal savings rate—
Total saved or extra principal—
Income remaining—
Share of after-tax income
Cash savings rate—
Investment contribution rate—
Extra debt-principal rate—
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Formula
Personal savings rate = (cash saved + employee investment contributions + extra debt principal) ÷ after-tax income.
Method
Choose one definition and apply it consistently.
There is no single household savings-rate convention. This calculator uses after-tax income and includes money directed to cash, investments and debt principal beyond required payments.
Reference
Disposable income is income available to spend or save.
The US Bureau of Economic Analysis defines the national personal saving rate as personal saving divided by disposable personal income. This calculator adapts the denominator concept for a user-entered household measure.