APC and APS describe how households divide income between spending and saving. Lower-income households usually have an APC near (or above) 1; as income rises, APC tends to fall. Don’t confuse APC with the marginal propensity to consume (MPC), which looks at changes in income.
How to use the APC Calculator – Average Propensity to Consume
- Consumption
- Disposable income
Results update as you type, and every field accepts the units shown in its menu.
How it works
Enter consumption spending and disposable income for the same period.
Tips
- Use your real spending from bank statements rather than guesses.
- Automate savings so they happen before you spend.
- Revisit your plan once a year or after any big life change.
- Keep an emergency fund before investing for long-term goals.
Common mistakes to avoid
- Underestimating irregular expenses such as car repairs, gifts and annual bills.
- Ignoring inflation for long-term goals.
- Taking on high-interest debt to fund wants.
Inputs explained
| Field | What to enter |
|---|---|
| Consumption | Amount in your currency |
| Disposable income | Amount in your currency |
What each result means
- Average propensity to consume (APC) = [Consumption]÷[Disposable income]
- Average propensity to save (APS) = 1 – [Consumption]÷[Disposable income]
- Savings = [Disposable income] – [Consumption]
Example values
How the main result changes when Consumption changes and everything else stays at the example values above:
| Consumption | Average propensity to consume (APC) |
|---|---|
| 21,000 | 0.42 |
| 31,500 | 0.63 |
| 42,000 | 0.84 |
| 52,500 | 1.05 |
| 63,000 | 1.26 |
| 84,000 | 1.68 |
Formula
APC = consumption ÷ disposable incomeAPS = savings ÷ disposable income = 1 − APCWorked example
Inputs — Consumption: $42,000; Disposable income: $50,000.
Results — Average propensity to consume (APC) = 0.84; Average propensity to save (APS) = 0.16; Savings = $8,000.00.
Frequently asked questions
What is APC?
The share of disposable income spent on consumption.
Can APC be greater than 1?
Yes, when people spend more than their income by borrowing or using savings.
How do APC and APS relate?
They always add up to 1.
What formula does the APC Calculator – Average Propensity to Consume use?
APC = consumption ÷ disposable income.