Retirement Calculator

Follow these steps to use the retirement calculator effectively:

1. Enter your current age and target retirement age. The difference between these two determines your savings timeline. Most people target age 65, but you can model early retirement at 55 or a later retirement at 70.
2. Enter your current retirement savings, which includes all accounts earmarked for retirement such as 401(k)s, IRAs, and brokerage accounts.
3. Enter your monthly contribution, the amount you add to retirement savings each month across all accounts.
4. Set your expected annual return rate. For a diversified stock portfolio, 7% (inflation-adjusted) is a reasonable long-term estimate. For a more conservative bond-heavy portfolio, consider 4% to 5%.
5. Specify your desired annual retirement income. A common rule of thumb is the 80% rule, which suggests you will need approximately 80% of your pre-retirement income to maintain your lifestyle. If you earn $75,000, target $60,000 per year in retirement. However, consider adjusting this upward if you plan to travel extensively or downward if your mortgage will be paid off.
6. Set the expected retirement duration. With increasing life expectancies, planning for 25 to 30 years of retirement is prudent. A 65-year-old today has roughly a 50% chance of living past 85 and a 25% chance of reaching 90.

The calculator displays your projected savings at retirement, sustainable monthly income, whether you have a surplus or gap relative to your desired income, and total out-of-pocket contributions. Do not forget to factor in healthcare costs, which are one of the largest expenses in retirement. Fidelity estimates that the average retired couple will need approximately $315,000 for healthcare expenses throughout retirement, not including long-term care.

A retirement calculator is a financial planning tool that projects how much money you will have saved by the time you retire based on your current savings, ongoing monthly contributions, and expected investment returns. It also estimates whether your projected nest egg will be sufficient to fund your desired retirement lifestyle and identifies any savings gap or surplus.

Retirement planning is one of the most critical financial tasks anyone will undertake, yet studies consistently show that Americans are underprepared. According to the Federal Reserve's Survey of Consumer Finances, the median retirement savings for American households is approximately $87,000, while financial advisors typically recommend accumulating 10 to 12 times your annual salary by age 67. This gap between actual savings and recommended targets is often called the retirement savings gap, and it affects millions of workers across every income level.

One key factor in retirement planning is Social Security. While Social Security provides a baseline income for retirees, the average monthly benefit in 2025 is approximately $1,900, which alone is not enough for most people to maintain their pre-retirement standard of living. Financial planners generally advise treating Social Security as a supplement rather than a primary income source and building personal savings to cover the remainder of your retirement expenses.

The single most important variable in retirement planning is time. Starting to save early gives your money decades to compound, dramatically reducing the monthly contribution needed to reach your goal. A 25-year-old who saves $300 per month at a 7% return will accumulate over $700,000 by age 65, while a 40-year-old would need to save nearly $900 per month to reach the same amount. This is why every financial advisor emphasizes the importance of starting as early as possible, even with small amounts.

Inflation also plays a significant role in retirement planning. Over time, rising prices erode the purchasing power of your savings. At a 3% annual inflation rate, something that costs $50,000 today will cost over $121,000 in 30 years. To account for this, you should use an inflation-adjusted (real) return rate when planning, which is typically the nominal return minus the inflation rate. For example, a 10% nominal stock market return with 3% inflation yields a real return of approximately 7%.

The retirement calculator uses two core financial formulas to project your savings, plus a withdrawal formula to estimate retirement income:

1. Future Value of Current Savings (Lump Sum):

FV = PV × (1 + r)n

2. Future Value of Monthly Contributions (Annuity):

FV = PMT × [((1 + r)n − 1) / r]

3. Total Savings at Retirement:

Total = FVsavings + FVcontributions

4. Sustainable Monthly Withdrawal (Present Value of Annuity):

Monthly Income = (Total × r) / (1 − (1 + r)−m)

Variable definitions:

The savings gap or surplus is calculated by comparing your projected total savings against the amount needed to fund your desired annual income over the retirement duration. The amount needed uses the present value of annuity formula: Amount Needed = (Desired Monthly Income) × [(1 − (1 + r)^−m) / r]. A positive result means you are projected to have more than enough, while a negative result indicates a shortfall that requires increased savings or adjusted expectations.

Example 1: Early Planner at Age 30

Emma is 30 years old with $50,000 in current retirement savings. She contributes $500 per month and expects a 7% annual return. She wants $60,000 per year in retirement income and plans to retire at 65 with a 25-year retirement duration. Her projected savings at retirement are approximately $1,197,811. This can provide a sustainable monthly income of roughly $8,468, well above her desired $5,000 per month. Her savings surplus is approximately $490,000, meaning she is significantly ahead of her goal. Emma's early start gives her 35 years of compound growth, where her $260,000 in total contributions generates over $937,000 in investment returns.

Example 2: Late Starter at Age 50

Robert is 50 years old with $120,000 saved for retirement. He realizes he needs to save aggressively and commits to contributing $1,500 per month. With a 7% expected return, he plans to retire at 67 with a 20-year retirement. His projected savings at retirement are approximately $648,000. This can sustain roughly $5,027 per month over 20 years. If Robert desires $60,000 per year ($5,000 per month), he is just barely on track. His total contributions of $426,000 generate approximately $222,000 in investment growth over 17 years. This example shows that while starting late is challenging, aggressive saving can still build a workable retirement fund, though with less margin for error.

Example 3: High Earner Targeting Early Retirement

Priya is 35 years old, earns $200,000 per year, and has $250,000 already saved. She dreams of retiring at 55 and is willing to save $3,000 per month to make it happen. With a 7% return, she targets $80,000 per year in retirement income over a 30-year retirement. Her projected savings at retirement age 55 are approximately $1,620,000. This provides a sustainable monthly income of about $10,826, giving her a comfortable surplus above her $6,667 monthly target. Her total contributions of $970,000 grow by an additional $650,000 through compound returns. However, Priya should also account for healthcare costs before Medicare eligibility at 65, which could require an additional $500 to $1,500 per month for private insurance during her first 10 years of retirement.