Practical guide
Understanding retirement savings projection — compare current age
Everyday editorial team · GEOINNOVATION CO., LTD · Published · Updated
What this calculation is for
A retirement-savings projection translates today’s balance and recurring contributions into a possible future fund. It is most useful as a range of scenarios rather than a single promise. Try lower returns, a later contribution start and higher inflation before deciding whether a plan is resilient.
How the method works
The model compounds the entered balance, adds scheduled contributions and compares nominal dollars with an inflation-adjusted balance. An illustrative withdrawal percentage converts the projected balance into annual income. Neither the return nor the withdrawal percentage is guaranteed.
A worked example
A projected $1,000,000 portfolio supports a $40,000 first-year draw at a 4% assumption before tax. If retirement is many years away, $40,000 then has less purchasing power than $40,000 today.
Assumptions and real-world differences
Constant returns hide market volatility and sequence risk. Contribution limits, tax treatment, benefit eligibility and future Social Security payments are not automatically determined. Employer contributions are included only where the tool provides a matching field.
Comparing two current age assumptions
The baseline and alternative calculations change current age while keeping the remaining model inputs the same. This isolates that particular assumption rather than comparing two completely different plans. Read both detailed outcomes and the B-minus-A difference in the headline’s units. A larger number is not automatically better: a larger cost and a larger savings balance have opposite interpretations.
Reproduce this tool’s example
These fixed example inputs are independent of edits you make above. Enter them in this tool to reproduce the result, then replace them with your own assumptions.
- Current age
- 35 years old
- Target retirement age
- 65 years old
- Current retirement savings
- 80,000 $
- Monthly personal contribution
- 700 $
- Monthly employer match
- 250 $
- Assumed annual return
- 6 %
- Annual inflation assumption
- 2.5 %
- Alternative current age
- 44 years old
Scenario B result: $740,287.99
Scenario A: $1,385,266.62. Projected retirement balance.
- Scenario A main result: $1,385,266.62
- Scenario B main result: $740,287.99
- Numeric difference (B − A), in result units: -644,978.63
Frequently asked questions
- Is the 4% illustration a safe-income guarantee?
- No. Outcomes depend on time horizon, markets, fees, taxes and spending flexibility.
- Why show today’s dollars?
- It separates projected nominal growth from the purchasing power lost to inflation.
- Can I also change other assumptions in the alternative?
- This one-factor comparison deliberately holds them fixed. Use the two-scenario version when rates, costs, timing or several household inputs all differ.