Are You Undersaving? How to Calculate Your Real Retirement Needs

Most people assume they’re saving “enough” for retirement—until they discover, often too late, that their nest egg falls far short of what they actually need. With rising inflation, longer life expectancy, and unpredictable healthcare costs, it’s more important than ever to ask yourself a crucial question: Are you undersaving?

If you’re unsure, don’t worry. This guide will walk you through how to calculate your real retirement needs so you can confidently build a plan that supports the lifestyle you want.

1. Why Most People Undersave for Retirement

The truth is simple: almost everyone underestimates how much retirement really costs. Life expectancy is higher now than it was decades ago, meaning your money has to stretch further. Add in inflation, evolving lifestyles, and unexpected medical bills, and suddenly the “comfortable retirement” you imagined becomes tough to maintain.

Many people undersave because they:

  • Rely too heavily on Social Security

  • Guess their retirement number instead of calculating it

  • Don’t account for inflation

  • Start saving too late

  • Underestimate healthcare costs

Understanding these pitfalls is your first step toward avoiding them.

2. The 80% Rule: Your Quick Retirement Income Baseline

A common rule of thumb says you’ll need about 80% of your pre-retirement income each year to maintain your lifestyle in retirement. This is a helpful starting point, especially for beginners.

For example, if you currently earn $80,000 a year, you may need about $64,000 per year in retirement.

However, this is only a baseline. Your actual needs may be higher or lower depending on your lifestyle, debts, travel plans, and health.

3. Calculating Your Total Retirement Number

To truly determine whether you’re undersaving, you need to calculate your real retirement number—the total amount you’ll need saved by the time you retire.

Step 1: Estimate Annual Retirement Expenses

Include:

  • Housing (even if your home is paid off)

  • Utilities and maintenance

  • Food and daily living costs

  • Healthcare and insurance

  • Transportation

  • Travel and entertainment

  • Emergency and miscellaneous expenses

Step 2: Multiply That Number by 25

This is known as the 25x Rule, based on the 4% Safe Withdrawal Rate.

If you expect to need $60,000 per year:
$60,000 × 25 = $1.5 million

This gives you a more realistic snapshot of your long-term savings goal.

4. Factoring in Inflation: The Hidden Threat to Your Savings

Inflation silently eats into your future purchasing power. What costs $1,000 today could cost $1,500 or more in 20 years. If your retirement plan doesn’t factor in inflation, you may end up drastically undersaving.

Adjusting Your Retirement Number for Inflation

Assuming average inflation of 2.5–3% per year:

  • In 20 years, your expenses could nearly double

  • Healthcare tends to inflate even faster—around 5–7% annually

Building in inflation protection is non-negotiable if you want your savings to last.

5. Healthcare Costs: The Most Overlooked Retirement Expense

Healthcare becomes one of the largest expenses in retirement, yet it’s often the most underestimated.

What to expect

  • Medicare doesn’t cover everything

  • Long-term care can cost thousands per month

  • Prescription costs increase over time

  • Emergency care becomes more likely with age

Most financial advisors recommend adding an extra $5,000–$10,000 per year just for healthcare expenses. If you have chronic conditions, plan higher.

6. How Much Should You Save Each Month?

Now that you have a clearer picture of your total retirement number, it’s time to break it down into manageable monthly savings goals.

Use the 15% Savings Rule

Financial experts recommend saving 15% of your income, starting as early as possible. If you start late, you may need to increase this to 20–25%.

The Power of Starting Early

If you start saving at:

  • Age 25: You can reach your retirement number with smaller monthly contributions

  • Age 40: You’ll need to save much more aggressively

  • Age 50+: You’ll need catch-up contributions, higher investments, or delayed retirement plans

Compounding works best for early savers—but it’s never too late to start.

7. Evaluating Your Current Retirement Savings

To know whether you’re undersaving, compare your current savings to what you should have saved based on your age.

A simple guideline

By age:

  • 30: 1x your annual salary saved

  • 40: 3x your salary

  • 50: 6x your salary

  • 60: 8–10x your salary

If you’re behind, don’t panic—many people are. The important part is adjusting your plan now.

8. Strategies to Catch Up If You’re Undersaving

Being behind doesn’t mean you’re out of options. With smart adjustments, you can still hit your retirement goals.

Increase your savings rate

Even boosting your contribution by 2–5% can make a big difference.

Maximize tax-advantaged accounts

  • 401(k)

  • Roth IRA

  • Traditional IRA

  • HSA (a powerful retirement tool disguised as a health account)

Reduce unnecessary expenses

Small cuts today lead to big retirement rewards.

Delay retirement by a few years

Working even 2–3 extra years significantly boosts your savings and reduces how long your money needs to last.

Final Thoughts: Are You Undersaving? Now You Know How to Find Out

Retirement planning doesn’t have to be a mystery. By understanding your real expenses, factoring in inflation, and calculating a realistic retirement number, you can avoid the massive mistake of undersaving.

Start evaluating your financial situation today. The sooner you align your savings with your goals, the more secure, comfortable, and fulfilling your retirement will be.

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