An Easy Way to See If You Have Enough Saved to Retire
Cash flow planning is a crucial part of your retirement plan, and much of it can be boiled down to one math equation.
Profit and prosper with the best of Kiplinger's advice on investing, taxes, retirement, personal finance and much more. Delivered daily. Enter your email in the box and click Sign Me Up.
You are now subscribed
Your newsletter sign-up was successful
Want to add more newsletters?
Delivered daily
Kiplinger Today
Profit and prosper with the best of Kiplinger's advice on investing, taxes, retirement, personal finance and much more delivered daily. Smart money moves start here.
Sent five days a week
Kiplinger A Step Ahead
Get practical help to make better financial decisions in your everyday life, from spending to savings on top deals.
Delivered daily
Kiplinger Closing Bell
Get today's biggest financial and investing headlines delivered to your inbox every day the U.S. stock market is open.
Sent twice a week
Kiplinger Adviser Intel
Financial pros across the country share best practices and fresh tactics to preserve and grow your wealth.
Delivered weekly
Kiplinger Tax Tips
Trim your federal and state tax bills with practical tax-planning and tax-cutting strategies.
Sent twice a week
Kiplinger Retirement Tips
Your twice-a-week guide to planning and enjoying a financially secure and richly rewarding retirement
Sent bimonthly.
Kiplinger Adviser Angle
Insights for advisers, wealth managers and other financial professionals.
Sent twice a week
Kiplinger Investing Weekly
Your twice-a-week roundup of promising stocks, funds, companies and industries you should consider, ones you should avoid, and why.
Sent weekly for six weeks
Kiplinger Invest for Retirement
Your step-by-step six-part series on how to invest for retirement, from devising a successful strategy to exactly which investments to choose.
It’s the pivotal question that all soon-to-be retirees should answer: Do we have enough saved to last us? One simple calculation can help give you some clarity.
“As you can see, at its core, cash flow analysis is a simple exercise. It’s also an incredibly important one that helps you recognize your cash flow needs and their timing.” That’s a quote from my last article, Retirement Planning Is Cash Flow Planning, where I explained how cash flow planning could prepare you for retirement. Today I’d like to lead you through a more detailed exercise that can help illustrate the process that we go through to determine if you have enough investments to support your retirement lifestyle.
One Couple’s Retirement Analysis
In this exercise, we’ll use a hypothetical couple who both recently retired at age 66. After completing an extensive review of their expenses, they determined that their cost of living is $54,000 a year, not including income tax. Their combined Social Security benefits equal $40,000 a year, and they have no additional income (pensions, part-time employment, etc.). At the beginning of their retirement at age 66, they have $550,000 in after-tax investments. To keep this example from becoming too complicated, we’ll assume that this couple does not have any IRA or 401(k) investments. If they did, we would need to plan for required minimum distributions and taxes on distributions from those plans.
From just $107.88 $24.99 for Kiplinger Personal Finance
Become a smarter, better informed investor. Subscribe from just $107.88 $24.99, plus get up to 4 Special Issues
Sign up for Kiplinger’s Free Newsletters
Profit and prosper with the best of expert advice on investing, taxes, retirement, personal finance and more - straight to your e-mail.
Profit and prosper with the best of expert advice - straight to your e-mail.
If the taxes on their investments and Social Security are $8,000 per year, their total cost of living would be $62,000 ($54,000 plus $8,000). Their expenses ($62,000) outweigh their income ($40,000) by $22,000 a year.
A Revealing Retirement Math Equation
Does our couple have enough in investments to cover that shortfall and carry them through retirement?
Generally speaking, they can find out by multiplying that $22,000-per-year annual shortfall by 25. I call the product of that mathematical equation the “Magic Number,” because it’s an amount that should provide the income needed to last throughout retirement at a 4% withdrawal rate per year. In our hypothetical couple’s case, their magic number is $550,000. That means that 4% of $550,000 equals the $22,000 that they need to support their retirement lifestyle.
With careful planning and discipline, we believe they should probably be fine. If they had less than $550,000 in investments, we would suggest they cut their cost of living, find other sources of income, delay retirement, or some combination of the above.
Your Results May Vary
This is a very simple example, which is for general guidance only. When working with clients, we use a more detailed version of the above exercise that adds variables such as inflation, tax brackets, expenses and money coming in the future, an emergency fund, insurance, etc. We also suggest the cash flow plan be updated at least annually, or as situations change.
Investment activity is one of those changing situations, and a more detailed analysis should also address the account losses that can accompany account drops. For example, if an account drop caused our hypothetical couple’s investments to fall to $400,000, they would need to reduce their cost of living or get part-time work to make up for the fact that the new amount that they can withdraw at 4% is $16,000, not the $22,000 that they were taking out.
We seek to address this problem with a buy, hold and protect investment strategy, which is designed to protect your principal and any gains that you have made. A stop loss for your stocks would be an example of a “protect strategy.” Such a strategy, though not perfect, is intended to protect investments during bear markets.
As you can imagine, I strongly advocate you utilize a buy, hold and protect strategy if you are retired or retiring soon. But no matter your investment strategy, it’s wise to prepare for retirement by analyzing your potential cash flow and making any necessary changes.
Profit and prosper with the best of Kiplinger's advice on investing, taxes, retirement, personal finance and much more. Delivered daily. Enter your email in the box and click Sign Me Up.

Ken Moraif is the CEO and founder of Retirement Planners of America (RPOA), a Dallas-based wealth management and investment firm with over $3.58 billion in assets under management and serving 6,635 households in 48 states (as of Dec. 31, 2023).
-
For the 2% Club, Guardrails and the 4% Rule Do Not WorkFor retirees with a pension, traditional withdrawal rules could be too restrictive. You need a tailored income plan that is much more flexible and realistic.
-
Now Is the Time to Start Designing Your 2027 RetirementThis is when you should be shifting your focus from growing your portfolio to designing an income and tax strategy that aligns your resources with your purpose.
-
Reduce Stress With a Layered Approach for Your Retirement MoneyTo be confident about retirement, consider building a safety net by dividing assets into distinct layers and establishing a regular review process. Here's how.
-
For the 2% Club, the Guardrails Approach and the 4% Rule Do Not Work: Here's What Works InsteadFor retirees with a pension, traditional withdrawal rules could be too restrictive. You need a tailored income plan that is much more flexible and realistic.
-
Retiring Next Year? Now Is the Time to Start Designing What Your Retirement Will Look LikeThis is when you should be shifting your focus from growing your portfolio to designing an income and tax strategy that aligns your resources with your purpose.
-
I'm a Financial Planner: This Layered Approach for Your Retirement Money Can Help Lower Your StressTo be confident about retirement, consider building a safety net by dividing assets into distinct layers and establishing a regular review process. Here's how.
-
The 4 Estate Planning Documents Every High-Net-Worth Family Needs (Not Just a Will)The key to successful estate planning for HNW families isn't just drafting these four documents, but ensuring they're current and immediately accessible.
-
Love and Legacy: What Couples Rarely Talk About (But Should)Couples who talk openly about finances, including estate planning, are more likely to head into retirement joyfully. How can you get the conversation going?
-
How to Get the Fair Value for Your Shares When You Are in the Minority Vote on a Sale of Substantially All Corporate AssetsWhen a sale of substantially all corporate assets is approved by majority vote, shareholders on the losing side of the vote should understand their rights.
-
How to Add a Pet Trust to Your Estate Plan: Don't Leave Your Best Friend to ChanceAdding a pet trust to your estate plan can ensure your pets are properly looked after when you're no longer able to care for them. This is how to go about it.
-
Want to Avoid Leaving Chaos in Your Wake? Don't Leave Behind an Outdated Estate PlanAn outdated or incomplete estate plan could cause confusion for those handling your affairs at a difficult time. This guide highlights what to update and when.