Retirement Calculator
Estimate how much you need to save for retirement and whether you are on track to meet your goals.
Retirement Corpus
$2,037,146
at age 60 ยท 30 years from now
Monthly Income (4% rule)
$2,798
inflation-adjusted
Total Contributions
$410,000
Total Growth
$1,627,146
Real Return Rate
4.9%
Inflation-Adjusted
$839,277
How the Retirement Calculator Works
This retirement calculator projects your future retirement corpus based on current savings, monthly contributions, expected returns, and time horizon. It factors in inflation to show both nominal and real (inflation-adjusted) values of your retirement fund.
Retirement Corpus Formula
Required Corpus = Annual Expenses ร 25 (4% rule) Annual Expenses = Monthly expenses ร 12 (inflation-adjusted)
25ร multiplier = Based on 4% safe withdrawal rate
Inflation adjustment = Expenses ร (1 + inflation)^years to retirement
Example Calculation
A 30-year-old wanting to retire at 60, with current expenses of $4,000/month and 3% inflation:
- Future monthly expenses (at 60): $4,000 ร (1.03)^30 = $9,712/month
- Annual expenses at retirement: $116,547
- Required corpus (25ร): $2,913,675
Tips for Retirement Planning
- Start saving early โ time is your greatest asset with compounding
- Maximize employer matching contributions (it is free money)
- Increase contributions by at least 1% each year
- Diversify investments across stocks, bonds, and other assets
- Plan for healthcare costs which often increase significantly in retirement
Assumptions
- Constant annual return rate on investments throughout accumulation phase
- Inflation rate remains constant for retirement income projections
- Regular contributions increase at a specified rate (or remain flat)
- Retirement corpus is drawn down systematically (no lump-sum withdrawals)
- Social Security/pension benefits are not included in the calculation
- No taxes on withdrawals from retirement accounts
Limitations
- Does not model market volatility or sequence-of-returns risk
- Healthcare cost increases (typically 2-3x general inflation) not modeled separately
- Social Security, pension, and annuity income not factored in
- Tax implications of retirement withdrawals (RMDs, capital gains) not calculated
- Does not account for changes in spending patterns during retirement
- Longevity risk โ calculator uses a fixed retirement duration, not probability-based
Common Mistakes
- Underestimating retirement duration (plan for 25-30 years, not just to average life expectancy)
- Not accounting for healthcare costs which rise faster than general inflation
- Ignoring the impact of sequence-of-returns risk in early retirement years
- Using pre-retirement spending as retirement budget (typically need 70-80% of pre-retirement income)
- Not factoring in Social Security or employer pension as supplementary income
- Assuming a fixed withdrawal rate without flexibility (the 4% rule needs adjustment for low-rate environments)
References
- Planning for Retirement โ Consumer Financial Protection Bureau
- 401(k) Contribution Limits โ Internal Revenue Service
- Retirement Estimator โ Social Security Administration
Frequently Asked Questions
What is the 4% rule for retirement?
The 4% rule suggests you can withdraw 4% of your retirement portfolio in the first year, then adjust for inflation annually, with a high probability your money lasts 30 years. For example, a $1,000,000 portfolio supports $40,000/year. This is a guideline โ actual safe withdrawal rates depend on market conditions, asset allocation, and retirement length.
How does inflation impact retirement savings?
Inflation erodes purchasing power over time. At 3% annual inflation, $100,000 today is worth only $55,000 in 20 years. Your retirement corpus must grow faster than inflation to maintain your lifestyle. This calculator accounts for inflation to show you the real value of your future savings.
When should I start saving for retirement?
The earlier the better โ compounding rewards time enormously. Starting at age 25 vs 35 with the same monthly contribution can result in 70-100% more retirement savings. Even small contributions in your 20s grow significantly. If you are starting late, increase your savings rate aggressively.
How much should I save for retirement?
A common guideline is to save 15-20% of gross income for retirement. By age 30, aim to have 1ร your salary saved; by 40, aim for 3ร; by 50, aim for 6ร; and by 60, aim for 8-10ร. These are benchmarks โ your actual target depends on desired retirement lifestyle and age.
How does Social Security affect my retirement planning?
Social Security provides a baseline income in retirement, typically replacing 30-40% of pre-retirement income for average earners. However, it should not be your only source. Plan for Social Security as a supplement, not a primary income stream, and build personal savings to cover the gap.
What is the ideal retirement age?
There is no one-size-fits-all answer. Traditional retirement age is 65, but early retirement (55-60) requires larger savings and longer portfolio lifespan. Delaying to 67-70 increases Social Security benefits by 8% per year. Use this calculator to model different retirement ages and see the impact on required savings.