Retirement Planning: Building a Nest Egg That Lasts

How Much Do You Need to Retire?

The amount you need depends on several factors: your desired lifestyle in retirement, where you plan to live, expected healthcare costs, and whether you have other income sources like pensions or Social Security.

A widely used guideline is the 4% rule: if you withdraw 4% of your portfolio in your first year of retirement and adjust for inflation thereafter, your money has a high probability of lasting 30 years. This means you need approximately 25 times your annual retirement expenses.

For example, if you expect to spend $50,000 per year in retirement, you would aim for a portfolio of $1,250,000. If you plan to spend $30,000 per year, $750,000 may be sufficient.

How Much Should You Save Each Month?

The monthly savings amount depends on your current age, target retirement age, expected investment returns, and target nest egg. A general guideline is to save 10-15% of your gross income for retirement, but this may not be enough if you start later or have ambitious goals.

For example, to reach $1,000,000 by age 65 with a 7% average annual return:

• Starting at age 25: approximately $380/month
• Starting at age 35: approximately $850/month
• Starting at age 45: approximately $2,000/month
• Starting at age 55: approximately $5,800/month

These figures illustrate the power of starting early — the same goal requires dramatically different monthly contributions depending on when you begin.

The 4% Rule Explained

The 4% rule was developed by financial advisor William Bengen in the 1990s, based on historical market data. It suggests that a retiree can withdraw 4% of their portfolio in the first year of retirement, then adjust that amount for inflation each subsequent year, with a high probability that the portfolio will last at least 30 years.

The rule assumes a balanced portfolio of stocks and bonds. It is not a guarantee — market conditions, sequence of returns risk, and unexpected expenses can all affect outcomes. Many advisors now suggest a more conservative withdrawal rate of 3-3.5%, especially for longer retirements.

Starting Retirement Savings at Different Ages

Starting in Your 20s

This is the most powerful time to start. Even small contributions have decades to compound. If you invest $300/month from age 25 to 65 at 7%, you could accumulate approximately $800,000 — despite contributing only $144,000 of your own money.

Starting in Your 30s

You still have 30+ years for compounding to work. The required monthly contribution is higher than in your 20s, but still manageable for most incomes. Prioritize capturing any employer match in your retirement accounts.

Starting in Your 40s

While you have less time for compounding, 20-25 years is still a meaningful horizon. You may need to save a higher percentage of income (15-20% or more) and consider whether delaying retirement by a few years could significantly improve your outlook.

Starting in Your 50s

It is not too late, but the math becomes more challenging. Catch-up contributions to retirement accounts (available to those 50 and older) can help. You may also want to work with a financial advisor to create a realistic plan that may include working longer, reducing expenses, or both.

Inflation and Retirement

Inflation is one of the biggest risks to retirement planning. If you plan to spend $50,000 per year in today's dollars, you will need significantly more in 30 years due to inflation. At 3% annual inflation, $50,000 in today's money would be worth approximately $121,000 in 30 years.

This is why it is important to use inflation-adjusted projections and to ensure your retirement investments include assets that historically keep pace with inflation, such as stocks. Our inflation calculator can help you understand how inflation affects your purchasing power over time.

Try It Yourself

Use our retirement calculator to estimate your nest egg and sustainable withdrawal amount. You can also use the savings goal calculator to determine how much you need to save each month to reach your target.

Open the Retirement Calculator → Calculate Your Monthly Savings Goal →

Risk & Limitations

Retirement projections assume constant rates of return, which do not reflect real-world market volatility. Sequence of returns risk — the order in which investment returns occur — can significantly affect retirement outcomes, especially in the early years of withdrawal. Taxes, healthcare costs, and unexpected expenses can also impact your plan. These projections are educational and hypothetical, not financial advice.