Free Tool
How Much Will Inflation Cost You?
Inflation is a silent tax on your savings. See what today's lifestyle will cost in the future and why your investments need to outpace rising prices.
Inflation Calculator
How This Calculator Works
The Model
This calculator shows how inflation erodes purchasing power over time. It takes your current annual spending and projects what the same lifestyle will cost in future dollars at a given inflation rate. It also shows what today’s dollars will be worth in the future, the flip side of the same coin.
Key Calculations
- Future cost: Each year, Future Spending = Current Spending × (1 + Inflation Rate)Years
- Purchasing power: Each year, Real Value = Today’s Dollars ÷ (1 + Inflation Rate)Years
- Doubling time: At a constant rate, costs approximately double every 72 ÷ Inflation Rate years (the Rule of 72)
- Extra cost: The difference between future spending and today’s spending shows the annual shortfall if income does not keep pace
Assumptions
- Inflation is constant each year (in reality, it fluctuates significantly)
- Your spending basket stays the same, no changes in lifestyle or consumption patterns
- No adjustments for category-specific inflation (healthcare, education, and housing often inflate faster than the general rate)
- The historical US inflation average is roughly 3% per year since 1926
Interpreting Your Results
- The red area on the chart shows the growing gap between today’s spending and what it will cost in the future
- The gray dashed line represents today’s spending level for reference
- The cents-on-the-dollar figure shows how much purchasing power a dollar loses over the period
- The doubling milestone shows how quickly costs can escalate, even moderate inflation compounds aggressively
Tips for Using This Tool
- Try 2-3% for a normal environment, 4-5% for elevated inflation, and 6-8% for stress testing
- Retirees should pay special attention, fixed income sources that do not adjust for inflation lose real value every year
- Use this alongside the Retirement Calculator to ensure your plan accounts for rising costs
- Healthcare costs historically inflate at 5-7% per year, well above the general rate, consider running a separate scenario
- Treasury Inflation-Protected Securities (TIPS) and equity investments are common tools for inflation protection
Cost of Living Over Time
What today’s lifestyle will cost in future dollars
Today’s Cost
$100,000
per year
In 25 Years
$209,378
per year (+109%)
Extra Cost
$109,378
more per year in Yr 25
Today’s dollar is worth 48¢ in 25 years
Cost doubles in 24 years
Inflation is a silent tax on your savings. At 3% annual inflation, your $100,000/year lifestyle will cost $209,378/year in 25 years. That’s why investment returns must outpace inflation to maintain your standard of living, a portfolio earning less than inflation is actually losing real value every year.
This calculator is for illustrative purposes only. It assumes a constant inflation rate, which does not reflect real-world variability. Actual inflation rates fluctuate and differ across spending categories. This tool does not constitute personalized financial advice. Rubric Advisors, LLC accepts no liability for any loss or damage arising from the use of this tool.
All computation happens in your browser. No data leaves your device.
This calculator is provided for educational and informational purposes only. It assumes a constant inflation rate, which does not reflect real-world variability. Actual inflation rates fluctuate year to year and differ across spending categories. This tool does not constitute personalized financial advice. Rubric Advisors, LLC accepts no liability for any loss or damage arising from the use of this tool. All computation happens entirely in your browser and no data is transmitted or stored.
Brought to you by Rubric Advisors
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