Compute income left after taxes and essential bills.
Please do not make financial decisions based on these results.
What is the Discretionary Income Calculator?
Compute income left after taxes and essential bills. To use the Discretionary Income Calculator, enter monthly disposable income, monthly essentials; it returns discretionary income, share of disposable income, and shows them instantly as you type.
Where the Discretionary Income Calculator fits
Compute income left after taxes and essential bills. The main figure it returns is the Discretionary income, worked out from the values you enter.
It belongs with the other macroeconomics tools. If you are comparing options or checking a result from another angle, try the Disposable Income Calculator, Private Savings Calculator or the Buying Power Calculator.
How to use the Discretionary Income Calculator
- Enter your numbers. The inputs are Monthly disposable income ($), Monthly essentials ($). Use real figures from your own records where you can. Fields marked optional can stay at zero.
- Read the result. The highlighted box gives the Discretionary income, and the cards below show Share of disposable income. Tables and charts break it down further.
- Test other scenarios. Results update as you type. Change one value at a time to see what drives the answer, and press Reset to go back to the defaults.
Formula and how it works
Example with real numbers
Here is the Discretionary Income Calculator using the default values shown in the calculator above:
Inputs
| Monthly disposable income ($) | 5,400 |
|---|---|
| Monthly essentials ($) | 3,800 |
Results
| Discretionary income | $1,600.00 |
|---|---|
| Share of disposable income | 29.63% |
With these inputs the calculator returns Discretionary income: $1,600.00. Change any value in the calculator to see how the result moves.
What if you change one input?
Sensitivity check: raising Monthly disposable income ($) from 5,400 to 6,480 (about 20% higher) and leaving everything else as in the example above changes the results like this:
| Result | Example | After the change | Change |
|---|---|---|---|
| Discretionary income | $1,600.00 | $2,680.00 | +67.5% |
| Share of disposable income | 29.63% | 41.36% | +39.6% |
The input that moves the result most is the one to check twice. Change it in the calculator above to test your own case.
What the results tell you
The results panel of the Discretionary Income Calculator reports Discretionary income and share of disposable income. Compare these figures while changing one input at a time, and use the related calculators below to look at the same situation from another angle.
Method and limits. This calculator applies the formula in the section above to your inputs, in your browser; nothing you enter is stored on our servers. The result is only as accurate as the numbers you enter and the formula shown above. It is for information, not financial, tax or legal advice.
Frequently asked questions
What counts as essential?
Housing, food, utilities, insurance, transportation and minimum debt payments.
What is the spending multiplier?
It is 1 divided by one minus the marginal propensity to consume, so an MPC of 0.8 gives a multiplier of 5.
Where do the economic inputs come from?
Use official sources such as the BEA, BLS, Federal Reserve, IMF or World Bank for GDP, CPI, unemployment and money supply figures.
Are the results guaranteed?
No. Results depend entirely on the numbers you enter and the formulas shown on this page. Please do not make financial decisions based on them alone; confirm important figures with a licensed professional.
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