Marginal propensity to save measures how much additional income is saved.
Marginal Propensity to Save (MPS) Calculator
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Results
MPS (marginal propensity to save)
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Table of Contents
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What is MPS Calculator?
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How to Use This Calculator
- Enter or select Increase in disposable income, Increase in consumer savings.
- Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
- Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
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Formula Used
MPS = change in savings/change in disposable income
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Variables Explained
| Input | What it means |
|---|---|
| Increase in disposable income | Income available after the deductions assumed in the economic model; use a change when the label asks for an increase. |
| Increase in consumer savings | Use the measured or stated value for this item, with the unit or category shown beside the field. |
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Worked Example
Saving an additional 50 from an income increase of 200 gives MPS=0.25.
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Why Use This Calculator?
Compare the result with the underlying statement, budget or proposed transaction. It is most useful when every amount uses the same reporting period and the same accounting definition.
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Common Mistakes
- In the simple consumption-saving model, MPC+MPS=1; taxes and other flows need consistent treatment.
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Frequently Asked Questions
Should I use monthly or annual figures?
Use one consistent period for every amount and rate in the relationship. If a form specifies an annual rate or a monthly amount, follow that label rather than mixing time periods.
Does the result include fees and tax?
Only the costs and taxes represented by the inputs and formula are included. A real transaction can include other charges, so compare the estimate with the underlying agreement or statement.
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Sources & References
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