Skip to content
ENExplore Calculators

Dual Income Savings Rate Calculator

Work out dual income savings rate instantly with clear inputs, formula shown and shareable results.

About Dual Income Savings Rate Calculator

Two incomes make a high savings rate achievable, but they also tempt households into a lifestyle only two incomes can support. Testing the budget against the larger income alone reveals how much resilience the arrangement really has.

Formula

Dual income resilience

Savings rate = (combined income - expenses) / combined income; runway = liquid savings / single-income deficit

Worked example

With the default values below, Dual Income Savings Rate Calculator returns Household Savings Rate of 38.095%. Change any input above and every figure here is recalculated in your browser.

Inputs used

First Incomeminimum 0
120,000
Second Incomeminimum 0
90,000
Total Monthly Expensesminimum 0
130,000
Liquid Savingsminimum 0
900,000

Results

Household Savings Rate
38.095%
Monthly Savings
$80,000.00
Surplus If One Income Stopped
-$10,000.00
Months Of Runway On One Income
90.0 months

Step by step

  1. 1Values used
  2. 2Dual income resilience
  3. 3Household Savings Rate= 38.095
  4. 4Monthly Savings= 80,000.00
  5. 5Surplus If One Income Stopped= -10,000.00
  6. 6Months Of Runway On One Income= 90.0 months

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax or compounding frequency into account.
  • Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Figures are estimates for planning only. Prices, returns, inflation and personal circumstances all change. This is not financial or tax advice — speak to a qualified adviser before making decisions.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Figures are estimates for planning only. Prices, returns, inflation and personal circumstances all change. This is not financial or tax advice — speak to a qualified adviser before making decisions.

Frequently Asked Questions

Why test against one income?

Because job loss, parental leave and illness all reduce a household to one income at some point.

Should fixed costs fit within one income?

It is the strongest form of resilience — it turns the second income into savings rather than a dependency.

Related Calculators

Dual Income Savings Rate Calculator | Calcrivo