The Finance Algorithm
§ Tool · tier 1 · independent

Inflation Impact Calculator.

See how inflation erodes your purchasing power over time and calculate the real value of your money in the future.

CalculatorFree, no signupOn-deviceupd May 2026
Inputs
Your numbers
$
$100k

The amount of money you want to evaluate

%
3.5%

RBA targets 2-3%. Aussie long-term average is ~2.5%

20y

How far into the future to calculate

%
7%

Compare your return against inflation — 0 = cash, 7-9 = shares

Helps tailor the AI verdict

Math updates live as you change inputs · AI runs on submit

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Move the sliders or type in the form on the left — the math updates live as you go. Click Get AI verdict when you want a written analysis.

Inflation is the 'silent tax' on your wealth. Even at a modest 3% per year, $100,000 today will only have the purchasing power of about $55,000 in 20 years. If your savings or investments aren't growing faster than inflation, you're actually losing money in real terms. This calculator shows you exactly how inflation impacts your purchasing power over time — and whether your investments are beating it.

§ Worked examples

Real-world scenarios

Retirement Planning Reality Check

Amy, 35, estimates she needs $60,000/year in retirement at age 67. But that's in today's dollars.

At 3% inflation, $60,000 today = $158,000 in purchasing power terms in 32 years. Amy either needs to save for a $158,000/year lifestyle OR plan that her $60,000 will feel like $23,000 by the time she's 97.

Cash vs Investing

Ben has $200,000 in a savings account earning 4.5%. Inflation is 3%.

Ben's real return is only 1.5% ($3,000/year). After 20 years, his $200,000 in a savings account = $134,000 in real purchasing power. Invested at 8%, it would be worth $329,000 in today's dollars.

§ FAQ

Questions Australians ask

§ Glossary

Plain-English definitions

CPI (Consumer Price Index)
The measure used by the ABS to track the average change in prices paid by urban households for a basket of goods and services. It's the main measure of inflation in Australia.
Real Return
Your investment return minus inflation. A 7% return with 3% inflation = 4% real return. Only real returns actually increase your purchasing power.
Purchasing Power
The quantity of goods and services that a given amount of money can buy. Inflation reduces purchasing power over time.