A serious downfall of the 4% rule is that it treats all your retirement spending as being equally important, Whitley explains.

A serious downfall of the 4% rule is that it treats all your retirement spending as being equally important, Whitley explains. mikroman6/Getty Images

Saving for retirement in your TSP with a federal annuity: How much is enough?

Planning for retirement with a federal pension is different from planning for retirement without one.

As you surely know, one of the most valuable benefits of federal employment is the prospect of a guaranteed stream of income in retirement. That is, a pension (annuity). At the same time, you might suspect that your pension alone will not be adequate to fund the retirement lifestyle that you desire. And so, you also regularly invest through your TSP account. But how much is enough? 

Likely you have heard of the 4% rule. While the word “rule” is a bit of an overstatement, the general idea is that when an imminent retiree observes their nest egg, there is an amount that they can withdraw each year and, assuming common investment return assumptions, not run out of money before they die. That amount is 4% (adjusted for inflation). 

This rule of thumb is based on 1994 research by Bill Bengen. While it has been poked and prodded over the years — at various times, commentators have suggested 3%, others 5% in some circumstances — there really hasn’t been a substantial deviation from the original figure. 

Although not always obviously so, this “rule” underpins many popular online retirement calculators that illustrate how much you need to save each year during your working career to fund a comfortable retirement. The most simplistic “plug and play” calculators assume that your retirement will be funded by a combination of Social Security and your accumulated savings. For federal retirees, this poses something of a (good) problem. With a pension in the mix, surely it should be the case that you can save less in your TSP than the 4% rule assumes. How do you put a number on that?

In fact, we can employ the handy “4% rule” to back-of-the-envelope our way to a result. If your projected annuity is $40,000 a year, the “rule” tells you that you need to save $1,000,000 to achieve the same result. ($1,000,000 x 4% = $40,000) So you might then say, “Well, as I do have an annuity, I can plan to save $1 million less in my TSP than recommended by the simple calculators.” (Or you may be more conservative, and reduce your goal by, say, $750,000.) 

That’s not a bad approach, but it does feel a bit…simplistic. A serious downfall of that method — and the 4% rule in general — is that it treats all your retirement spending as being equally important. 

At some point, you may have completed an exercise to determine how much you will likely spend in retirement. Or you may have settled on the other common retirement assumption that your expenses in retirement will be 80% of what you spent while working. But if your analysis stops there, I’m afraid that you have only done half the work. And this brings us back to how planning for retirement with a federal pension is different from planning without.

Generally, your living expenses fall into two camps: must-have and discretionary. In retirement, the goal is to be able to cover all your “musts” with guaranteed income. For federal retirees, that means Social Security and your pension. A more nuanced calculation of your TSP goal would be to first determine your non-discretionary expenses (housing, food, medical care, transportation, etc.), and subtract that from your projected guaranteed income stream. Ideally, the result would be a positive number. (Will you decide to work longer than originally intended to increase your annuity and make this so?

Your TSP goal, then, would be the amount of money necessary to fund your discretionary spending, such as travel, a second home, or a more elevated day-to-day existence.

There is one other aspect to consider when a future federal annuity recipient is investing in their TSP. Simply put, can you take on more investment risk because you have a pension that, combined with Social Security, could cover all your non-discretionary expenses? Or should you take less investment risk because you already “won the game” and don’t need to generate an outsized rate of return to secure a happy retirement? There is no math answer to this question; it is a matter of your personal risk preference. That is, with a pension in hand, you may objectively have the capacity to take on more investment risk, but do you have the emotional desire to do so?

Does having a federal pension make it easier or harder to plan for your retirement? On balance, I think that most of us would vote “easier” because it removes much (but not all) of the risk of “getting it wrong.” But there are still critical decisions to be made, particularly how much to devote to your TSP savings during your working career. Understanding how you might use this nest egg in retirement could help you answer that question.

Financial coach and planner Lisa Whitley retired from the federal government in 2019. Her practice, MoneyByLisa, is a registered investment advisor.

X
This website uses cookies to enhance user experience and to analyze performance and traffic on our website. We also share information about your use of our site with our social media, advertising and analytics partners. Learn More / Do Not Sell My Personal Information
Accept Cookies
X
Cookie Preferences Cookie List

Do Not Sell My Personal Information

When you visit our website, we store cookies on your browser to collect information. The information collected might relate to you, your preferences or your device, and is mostly used to make the site work as you expect it to and to provide a more personalized web experience. However, you can choose not to allow certain types of cookies, which may impact your experience of the site and the services we are able to offer. Click on the different category headings to find out more and change our default settings according to your preference. You cannot opt-out of our First Party Strictly Necessary Cookies as they are deployed in order to ensure the proper functioning of our website (such as prompting the cookie banner and remembering your settings, to log into your account, to redirect you when you log out, etc.). For more information about the First and Third Party Cookies used please follow this link.

Allow All Cookies

Manage Consent Preferences

Strictly Necessary Cookies - Always Active

We do not allow you to opt-out of our certain cookies, as they are necessary to ensure the proper functioning of our website (such as prompting our cookie banner and remembering your privacy choices) and/or to monitor site performance. These cookies are not used in a way that constitutes a “sale” of your data under the CCPA. You can set your browser to block or alert you about these cookies, but some parts of the site will not work as intended if you do so. You can usually find these settings in the Options or Preferences menu of your browser. Visit www.allaboutcookies.org to learn more.

Sale of Personal Data, Targeting & Social Media Cookies

Under the California Consumer Privacy Act, you have the right to opt-out of the sale of your personal information to third parties. These cookies collect information for analytics and to personalize your experience with targeted ads. You may exercise your right to opt out of the sale of personal information by using this toggle switch. If you opt out we will not be able to offer you personalised ads and will not hand over your personal information to any third parties. Additionally, you may contact our legal department for further clarification about your rights as a California consumer by using this Exercise My Rights link

If you have enabled privacy controls on your browser (such as a plugin), we have to take that as a valid request to opt-out. Therefore we would not be able to track your activity through the web. This may affect our ability to personalize ads according to your preferences.

Targeting cookies may be set through our site by our advertising partners. They may be used by those companies to build a profile of your interests and show you relevant adverts on other sites. They do not store directly personal information, but are based on uniquely identifying your browser and internet device. If you do not allow these cookies, you will experience less targeted advertising.

Social media cookies are set by a range of social media services that we have added to the site to enable you to share our content with your friends and networks. They are capable of tracking your browser across other sites and building up a profile of your interests. This may impact the content and messages you see on other websites you visit. If you do not allow these cookies you may not be able to use or see these sharing tools.

If you want to opt out of all of our lead reports and lists, please submit a privacy request at our Do Not Sell page.

Save Settings
Cookie Preferences Cookie List

Cookie List

A cookie is a small piece of data (text file) that a website – when visited by a user – asks your browser to store on your device in order to remember information about you, such as your language preference or login information. Those cookies are set by us and called first-party cookies. We also use third-party cookies – which are cookies from a domain different than the domain of the website you are visiting – for our advertising and marketing efforts. More specifically, we use cookies and other tracking technologies for the following purposes:

Strictly Necessary Cookies

We do not allow you to opt-out of our certain cookies, as they are necessary to ensure the proper functioning of our website (such as prompting our cookie banner and remembering your privacy choices) and/or to monitor site performance. These cookies are not used in a way that constitutes a “sale” of your data under the CCPA. You can set your browser to block or alert you about these cookies, but some parts of the site will not work as intended if you do so. You can usually find these settings in the Options or Preferences menu of your browser. Visit www.allaboutcookies.org to learn more.

Functional Cookies

We do not allow you to opt-out of our certain cookies, as they are necessary to ensure the proper functioning of our website (such as prompting our cookie banner and remembering your privacy choices) and/or to monitor site performance. These cookies are not used in a way that constitutes a “sale” of your data under the CCPA. You can set your browser to block or alert you about these cookies, but some parts of the site will not work as intended if you do so. You can usually find these settings in the Options or Preferences menu of your browser. Visit www.allaboutcookies.org to learn more.

Performance Cookies

We do not allow you to opt-out of our certain cookies, as they are necessary to ensure the proper functioning of our website (such as prompting our cookie banner and remembering your privacy choices) and/or to monitor site performance. These cookies are not used in a way that constitutes a “sale” of your data under the CCPA. You can set your browser to block or alert you about these cookies, but some parts of the site will not work as intended if you do so. You can usually find these settings in the Options or Preferences menu of your browser. Visit www.allaboutcookies.org to learn more.

Sale of Personal Data

We also use cookies to personalize your experience on our websites, including by determining the most relevant content and advertisements to show you, and to monitor site traffic and performance, so that we may improve our websites and your experience. You may opt out of our use of such cookies (and the associated “sale” of your Personal Information) by using this toggle switch. You will still see some advertising, regardless of your selection. Because we do not track you across different devices, browsers and GEMG properties, your selection will take effect only on this browser, this device and this website.

Social Media Cookies

We also use cookies to personalize your experience on our websites, including by determining the most relevant content and advertisements to show you, and to monitor site traffic and performance, so that we may improve our websites and your experience. You may opt out of our use of such cookies (and the associated “sale” of your Personal Information) by using this toggle switch. You will still see some advertising, regardless of your selection. Because we do not track you across different devices, browsers and GEMG properties, your selection will take effect only on this browser, this device and this website.

Targeting Cookies

We also use cookies to personalize your experience on our websites, including by determining the most relevant content and advertisements to show you, and to monitor site traffic and performance, so that we may improve our websites and your experience. You may opt out of our use of such cookies (and the associated “sale” of your Personal Information) by using this toggle switch. You will still see some advertising, regardless of your selection. Because we do not track you across different devices, browsers and GEMG properties, your selection will take effect only on this browser, this device and this website.