Free Retirement Calculator
Project retirement balance and check the 4% withdrawal rule.
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Inputs
Result
Projected balance at retirement
$1,096,342.60
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Short answer
Retirement balance is the future value of current savings plus the annuity of future contributions, compounded at the expected annual return.
What is the Retirement Calculator?
A retirement calculator projects how much you'll have accumulated by a target date and estimates a sustainable withdrawal rate.
How does the Retirement Calculator work?
Compound the current balance monthly. Add the future value of the monthly contribution annuity. Apply the 4% rule to estimate safe first-year withdrawals.
Formula
Variables
PCurrent savingsPMTMonthly contributioniMonthly rate = annual/12mMonths = years × 12
Explanation
The two-term formula sums compound growth of current savings and future value of the contribution annuity.
Examples
Example 1: $50k + $1k/mo, 7% for 25 years
Balance ≈ $1.09M, safe withdrawal ≈ $43,600/yr or ~$3,633/month.
Applications
- 401(k) and IRA planning
- Financial-independence targets
- Early-retirement (FIRE) projections
Advantages
- Shows compounding growth in dollar terms
- Applies the widely-cited 4% rule automatically
Limitations
- Assumes a fixed rate — real markets swing
- Ignores taxes on withdrawals
- Ignores inflation unless the rate is real (after-inflation)
Common mistakes
- Using a nominal rate then not adjusting the balance for inflation
- Treating the 4% rule as a guarantee
Tips
- Use ~5% real (after-inflation) for a conservative long-run estimate
- Recalculate every 3–5 years as market and life change
Related concepts
The Retirement Calculator sits inside the Finance Calculators hub, in the investing & retirement cluster. Growing capital and planning for withdrawal. Understanding the terms below makes the output easier to interpret and easier to compare against neighbouring measures.
Practical use cases and industry applications
Understanding Retirement
A retirement calculator projects how much you'll have accumulated by a target date and estimates a sustainable withdrawal rate. Within finance calculators, retirement belongs to the investing & retirement cluster, where it shares terminology and assumptions with closely related tools.
Learning how retirement is calculated
The two-term formula sums compound growth of current savings and future value of the contribution annuity. Working through the variables one at a time — P, PMT, i, m — makes the result reproducible by hand and easier to sanity-check.
Using retirement to make a decision
401(k) and IRA planning Financial-independence targets Early-retirement (FIRE) projections Because outputs depend on the assumptions you enter, run more than one scenario before committing to a figure.
How retirement compares with related measures
compound growth, asset allocation, withdrawal rate, yield all describe adjacent aspects of investing & retirement. Comparing this calculator's output against those measures — using the related tools listed on this page — prevents a single metric from being read in isolation.
Frequently asked questions
What is the 4% rule?
A study-based guideline suggesting a retiree can withdraw 4% of the initial balance in year one, adjusted for inflation each year, with high probability of not running out over 30 years.
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