ganak.appRetirement Calculator
Free retirement calculator to estimate how much you need to save, project your retirement corpus, and calculate sustainable monthly income. Supports multiple currencies worldwide. Covers accumulation phase with compound growth, decumulation with inflation-adjusted withdrawals, the 4% rule for sustainable income, and additional income sources like pensions and social security. Essential for retirement planning at any age.
Retirement Summary
Income projection, readiness score, and key metrics
Surplus: 876K
Corpus Breakdown
How your retirement corpus is built
Year-by-Year Projection
Detailed breakdown of savings growth and retirement withdrawals
| Age | Balance | Contributions | Growth | Withdrawal | Phase |
|---|---|---|---|---|---|
| 30 | $50,000 | $50,000 | $0 | — | Saving |
| 31 | $66,007 | $62,000 | $4,007 | — | Saving |
| 32 | $83,171 | $74,000 | $9,171 | — | Saving |
| 33 | $101,576 | $86,000 | $15,576 | — | Saving |
| 34 | $121,312 | $98,000 | $23,312 | — | Saving |
| 35 | $142,474 | $110,000 | $32,474 | — | Saving |
| 36 | $165,166 | $122,000 | $43,166 | — | Saving |
| 37 | $189,499 | $134,000 | $55,499 | — | Saving |
| 38 | $215,590 | $146,000 | $69,590 | — | Saving |
| 39 | $243,568 | $158,000 | $85,568 | — | Saving |
How the Retirement Calculator Works
Two-phase projection: accumulation during working years, drawdown during retirement
This Retirement Calculator uses a two-phase model to project your financial future: an accumulation phase (saving years) and a decumulation phase (retirement years).
Accumulation Phase Formula:
Balance = Previous Balance × (1 + Monthly Return Rate) + Monthly Contribution
Contributions are compounded monthly and can increase each year by a percentage you specify.
Decumulation Phase:
Once you retire, the calculator simulates monthly withdrawals from your corpus. Your remaining balance earns returns at the post-retirement rate, while withdrawals increase annually with inflation.
The 4% Rule:
A widely referenced guideline suggesting you can withdraw 4% of your retirement corpus annually (adjusted for inflation) with a high probability of not running out of money over a 30-year retirement.
Key Assumptions
Important factors that affect your retirement projection
Constant Rates
Returns, inflation, and contribution growth are assumed constant over time. In reality, markets fluctuate — use conservative estimates for more reliable projections.
Monthly Compounding
Returns are compounded monthly during both accumulation and decumulation phases for more accurate projections.
Inflation-Adjusted Withdrawals
Retirement withdrawals increase annually at the inflation rate to maintain purchasing power throughout retirement.
No Taxes Modeled
This is a pre-tax projection. Actual retirement income may be lower after taxes depending on your country and account types.
Additional Income Sources
Pension, social security, or other income is treated as a fixed monthly amount that reduces the withdrawal needed from savings.
Tips and Common Mistakes
Key things to know about retirement planning
Start early
Even small monthly contributions compound significantly over decades. Starting 10 years earlier can double your corpus at retirement.
Increase contributions annually
Direct annual raises to retirement savings. Even 3–5% annual increases make a dramatic difference over your career.
Diversify your income
Pensions, social security, rental income, and part-time work can significantly reduce the amount you need to withdraw from savings.
Use conservative estimates
Plan for lower returns (5–7% for equities, 3–4% post-retirement) and higher inflation to build a margin of safety.
Underestimating longevity
Many people plan until age 80 but live into their 90s. Plan for at least age 85–90 to avoid outliving your savings.
Ignoring inflation
Not adjusting for inflation is the most common mistake. At 3% inflation, your purchasing power halves in ~24 years.
Overestimating returns
Using 12–15% return expectations based on past bull markets leads to under-saving. Use realistic long-term averages.
Not accounting for healthcare
Healthcare costs typically increase with age. Budget an additional 15–25% on top of regular living expenses for medical care.
Retirement Calculator FAQ
Common questions about retirement planning, savings, and withdrawal strategies