Simple Retirement Calculator

This calculator is designed for speed and simplicity. Start by entering your timeline: your Current Age, the Retirement Age you're aiming for, and your planned Life Expectancy. A longer life expectancy provides a greater margin of safety.

Next, input your savings details. Enter your Current Savings, which is the total amount you have saved for retirement today across all accounts like a 401(k) or IRA. Then, add your Monthly Savings, the amount you consistently contribute to these accounts.

Finally, set your assumptions. The Desired Annual Income is how much you want to live on each year in retirement, in today's dollars. The calculator will adjust this for inflation. The Annual Return is your expected average investment return before, during, and after retirement. The Inflation Rate is used to estimate the future cost of living. For a more detailed look at spending, try the retirement expense calculator.

Current Age, Retirement Age, and Life Expectancy

These three inputs define your financial timeline. The time between your current age and retirement age is your accumulation phase—the window you have to save and invest. The time between your retirement age and life expectancy is your distribution phase—the period your savings need to support you. Planning for a long life (e.g., to age 90 or 95) is a common strategy to reduce the risk of outliving your money.

Current Savings

This is the foundation of your retirement plan—the total amount you've already accumulated in all your retirement accounts. A larger starting balance gives compounding more to work with, significantly impacting your final projected savings. Check your balances in your 401(k), Roth IRA, Traditional IRA, and any other investment accounts you plan to use for retirement.

Monthly Savings

This is the engine of your future growth. It represents the new money you add to your retirement accounts each month. Consistent saving is one of the most powerful levers you can pull to improve your outcome. To see if you're saving enough, compare your habits to common benchmarks in how much should I save for retirement each month.

Desired Annual Income

This is your retirement spending goal, expressed in today's dollars. The calculator uses the inflation rate you provide to estimate what this income will need to be when you actually retire. For example, a $50,000 income need today could require $90,000 in 25 years. If you're unsure what to enter, a common rule of thumb is to aim for 70-85% of your pre-retirement income. For more context, see what is a good retirement income.

Annual Return

This is the average annual rate of return you expect your investments to generate over the long term. This is an educated guess, not a guarantee. A diversified portfolio of stocks and bonds has historically returned an average of 6-8% annually, but past performance does not predict future results. Using a more conservative number (e.g., 5-6%) can build a buffer into your plan.

Inflation Rate

Inflation is the rate at which the cost of goods and services increases over time, eroding the purchasing power of your money. A 3% inflation rate means that what costs $100 today will cost $103 next year. Factoring in inflation is critical for long-term planning, as it ensures your retirement income goal keeps pace with rising costs. Learn more about its impact in how inflation affects retirement savings.

This calculator uses established financial formulas to provide a clear, high-level projection. It operates in two main steps.

First, it projects the future value of your savings at your planned retirement age. It calculates the growth of your Current Savings as a lump sum investment. It separately calculates the future value of your ongoing Monthly Savings using a future value of an annuity formula. The sum of these two figures is your total projected savings at retirement.

Second, the calculator estimates the total amount of money you'll need to fund your desired retirement lifestyle. It does this by calculating the present value of your Desired Annual Income for the number of years in retirement. To account for both investment growth and inflation during retirement, it uses a "real rate of return" (your annual return minus the inflation rate). This single number represents the nest egg required at the start of retirement to support your inflation-adjusted withdrawals.

The calculator then compares your projected savings with the amount you need to determine if you have a surplus or a shortfall. It also projects how long your money will last by simulating year-by-year withdrawals in retirement.

This tool is simplified for clarity and speed. It does not account for taxes, Social Security benefits, pensions, employer contributions, or changing contribution limits over time. For an analysis including these factors, use the more advanced retirement calculator.

The projection is based on standard time value of money formulas.

Savings Projection Formula

The calculator finds your total savings at retirement by combining the future value of your current savings with the future value of your monthly contributions.

// Future Value of Current Savings (Lump Sum)
fv_current_savings = current_savings * (1 + annual_return) ^ years_to_retire

// Future Value of Monthly Savings (Annuity)
total_months = years_to_retire * 12
monthly_return = annual_return / 12
fv_contributions = monthly_savings * ( ((1 + monthly_return) ^ total_months - 1) / monthly_return )

// Total Projected Savings
projected_savings = fv_current_savings + fv_contributions

Amount Needed Formula

To determine the nest egg required at retirement, the calculator uses a present value of an annuity formula. It first adjusts your income goal for inflation and then calculates the lump sum needed to support those withdrawals, using a real rate of return.

// Real Rate of Return (accounts for inflation)
real_return = ( (1 + annual_return) / (1 + inflation_rate) ) - 1

// Income Needed in First Year of Retirement
inflation_adjusted_income = desired_annual_income * (1 + inflation_rate) ^ years_to_retire

// Amount Needed at Retirement (Present Value of an Annuity)
needed_at_retirement = inflation_adjusted_income * ( (1 - (1 + real_return) ^ -retirement_years) / real_return )

Money Lasts Until Formula

The calculator simulates your retirement year by year to see when your balance might run out.

// For each year in retirement:
starting_balance = previous_year_end_balance
withdrawal_this_year = inflation_adjusted_income * (1 + inflation_rate) ^ (current_retirement_year - 1)
growth_this_year = (starting_balance - withdrawal_this_year) * annual_return
ending_balance = starting_balance - withdrawal_this_year + growth_this_year

This process repeats until the ending_balance reaches zero or you reach your life expectancy.

This is the central question of retirement planning. While this calculator gives you a personalized estimate, some general guidelines can help you stay on track.

Many financial experts recommend saving at least 15% of your pre-tax income for retirement. This includes your own contributions and any employer match you receive. If you start saving late, you may need to target a higher percentage.

Another helpful approach is to use age-based savings benchmarks. These suggest having a certain multiple of your annual salary saved by different ages. For example:

• By age 30: 1x your annual salary
• By age 40: 3x your annual salary
• By age 50: 6x your annual salary
• By age 60: 8x your annual salary

These are just starting points. Your personal goal will depend on your desired retirement age, lifestyle, and other income sources. For a deeper dive, read our guide on retirement savings by age or use the retirement savings calculator to set a more specific target.

It's important to understand the role of a simple calculator like this one. Its purpose is to provide a quick, directional estimate. It's excellent for getting started, testing basic scenarios, and understanding the core mechanics of saving and compounding.

However, a simple calculator makes several assumptions. It doesn't include:

• Social Security: A major income source for most retirees. Use the Social Security calculator to estimate your benefit.
• Taxes: Withdrawals from traditional 401(k)s and IRAs are typically taxed as ordinary income.
• Employer Match: This is a crucial part of many savings plans, essentially offering a 100% return on your contributions up to a certain limit.
• Healthcare Costs: These are a significant and often underestimated retirement expense. See the retirement healthcare cost calculator.
• Pensions or Other Income: Any guaranteed income reduces the burden on your portfolio.

When you're ready to create a more detailed and realistic plan, you should use our comprehensive retirement calculator. It allows you to input these additional variables for a more robust projection.

One of the key outputs of this calculator is your estimated first-year withdrawal rate. This is the percentage of your total nest egg you would withdraw in your first year of retirement to meet your income goal.

This metric is a quick gauge of your plan's sustainability. A lower withdrawal rate is generally safer and gives your portfolio a better chance to last through a long retirement. A very high withdrawal rate (e.g., 7% or more) could be a red flag that you might deplete your savings too quickly, especially if you retire into a down market.

A well-known guideline is the 4% rule, which suggests that a 4% initial withdrawal rate, adjusted annually for inflation, has a high probability of success over a 30-year retirement. You can use our 4% rule retirement withdrawal calculator to test this strategy with your numbers.

• Projected Savings: This is the estimated value of your retirement accounts on the day you retire. It's the result of your current savings, future contributions, and decades of potential investment growth.
• Amount Needed: This is the estimated size of the nest egg required to fund your desired annual income throughout your retirement, accounting for inflation.
• Surplus / Shortfall: This is the difference between your Projected Savings and the Amount Needed. A surplus is a great sign, while a shortfall indicates a gap you need to close.
• Money Lasts To: This shows the age at which your savings are projected to run out based on your inputs. Ideally, this age is beyond your life expectancy.
• Retirement Readiness Score: This score, from 0 to 100, provides a snapshot of your plan's health. A higher score indicates you are more likely to be on track to meet your goals.
• Contributions vs. Growth Chart: This donut chart visualizes the power of compounding. It shows how much of your final nest egg comes from your own contributions versus how much comes from investment growth. Often, growth makes up more than half of the total.
• Savings Over Time Chart: This line chart shows the entire lifecycle of your savings, from accumulation during your working years to the gradual drawdown in retirement.

If your projection shows a shortfall, don't be discouraged. You have several powerful levers to pull to get back on track.

1. Save More: Increasing your Monthly Savings is the most direct way to improve your outcome. Even small increases can make a huge difference over time due to compounding.
2. Work a Little Longer: Delaying your Retirement Age by just a few years can have a triple benefit: it gives your money more time to grow, you have more years to contribute, and it shortens the number of years you'll be drawing down your savings. Test this with our retire at 55 calculator or retire at 60 calculator.
3. Adjust Your Spending Goal: Re-evaluating your Desired Annual Income can make your goal more attainable. Use a retirement budget calculator to get a more precise handle on your expected expenses.
4. Review Your Investments: Ensure your Annual Return assumption is realistic for your asset allocation. While you can't control the market, you can control your investment strategy.

If you feel like you're behind, it's never too late to make a positive change. Read our guide on is it too late to save for retirement for encouragement and actionable steps.

When using a simple calculator, be aware of these common pitfalls:

1. Being Too Optimistic: Using an unrealistically high Annual Return can make a weak plan look strong. It's often better to be conservative with your assumptions.
2. Forgetting Inflation: Ignoring inflation is a critical error. A $50,000 income might seem great today, but its purchasing power will be much lower in 20 or 30 years.
3. Underestimating Longevity: Planning to live only to the average life expectancy can be risky. Planning to age 90, 95, or even 100 provides a crucial buffer.
4. Ignoring Taxes and Healthcare: This calculator omits taxes and healthcare costs, which can be two of the biggest expenses in retirement. Remember to factor these in separately or use a more advanced tool.
5. Treating It as a "One and Done" Plan: Retirement planning is an ongoing process. Revisit this calculator annually or whenever your financial situation changes to ensure you're still on the right path.