Key Takeaways
- TSP RMDs begin at age 73 for most federal retirees as of 2026, with distributions required annually.
- Recent legislation may further adjust RMD ages, so staying informed of official federal updates is crucial.
Understanding when and how you must take required minimum distributions (RMDs) from your Thrift Savings Plan (TSP) is essential to staying compliant with federal rules after retirement. Knowing the age requirements, calculation methods, and penalties for missed RMDs can help minimize costly surprises and support your long-term retirement planning.
What Are TSP RMDs?
Definition of Required Minimum Distributions
Required Minimum Distributions (RMDs) are mandatory withdrawals you must take from retirement accounts such as the TSP once you reach a certain age. Under federal tax law, RMDs ensure you eventually withdraw and pay taxes on money saved in tax-deferred accounts.
An RMD is calculated based on your account balance and life expectancy tables provided by the Internal Revenue Service (IRS). Failing to take your RMD can result in significant tax penalties.
Federal guidelines for TSP accounts
For federal employees and retirees, the Thrift Savings Plan follows IRS rules. Once you reach the specified RMD age, the TSP automatically calculates and distributes the minimum withdrawal required each year. These distributions are subject to federal income tax in the year they are taken, unless part of a Roth TSP (where qualified withdrawals are generally tax-free).
When Must Federal Retirees Start RMDs?
Current age requirement for TSP withdrawals
As of 2026, you must begin taking TSP RMDs by April 1 of the year after you turn age 73. For some retirees, this changes from previous rules, where the age requirement was 70½ or 72. The updated rule applies to anyone turning 73 on or after January 1, 2026.
If you separated from federal service prior to reaching the required age, RMDs will begin based on your age in the year after retirement. For those who continue to work past the RMD age, distributions may be deferred as long as you remain employed by the federal government and do not own more than 5% of your employer (which rarely applies in the federal service context).
How the rule changed after 2026
Recent federal legislation, specifically the SECURE Act and its amendments, gradually increased the RMD age from 70½ to 73. Future adjustments may depend on additional legislation. For now, the requirement is age 73, but proposed updates may shift the starting age higher in coming years. Always consult the most recent federal guidance for the specific RMD age that applies to your birth year.
How Do TSP RMD Rules Work?
Calculation basics for TSP distributions
The TSP calculates your RMD based on your account balance as of December 31 of the previous year, divided by a distribution period found in IRS life expectancy tables (most commonly the Uniform Lifetime Table). For example, if your TSP balance at the end of the year was $100,000 and the IRS table shows a distribution period of 24.7 for your age, your RMD would be roughly $4,049 (the actual divisor and calculation will vary depending on your age and circumstances).
Because the TSP manages RMDs automatically, you generally do not need to make a special withdrawal request to satisfy your minimum amount. However, with multiple retirement accounts (such as traditional IRAs or workplace plans), you must calculate and satisfy the RMD separately for each account, unless IRS rules permit aggregation.
Timing and annual deadlines
Your first TSP RMD must be taken by April 1 of the year after you reach the required starting age (currently 73). For following years, your RMD must be withdrawn by December 31 of each year. If you choose to delay your first RMD until April 1, you will need to take two RMDs in that first required year—one for the year you turned the required age and one for the following year.
The TSP will usually notify you of your RMD requirements, but you are ultimately responsible for ensuring you make the proper distribution by each deadline to avoid IRS penalties.
What Happens If You Miss an RMD?
IRS penalties for missed distributions
The IRS imposes a substantial penalty for not taking the full RMD by the deadline. As of 2026, the penalty is 25% of the amount you failed to distribute. The IRS may reduce this penalty to 10% if you promptly correct the missed RMD by making the required withdrawal and filing the relevant paperwork.
This penalty is assessed in addition to regular income tax owed on the amount that should have been withdrawn. Unlike some other tax rules, the IRS offers little leniency for repeated missed RMDs, so compliance is crucial.
Possible steps if an RMD is missed
If you miss an RMD, withdraw the overdue amount as soon as you discover the oversight. Individuals can request a waiver of some or all of the penalty by filing IRS Form 5329 and providing a reasonable explanation. While approval is not guaranteed, the IRS can waive the penalty for reasonable error when you act promptly to address the missed distribution. You will still be responsible for the income tax due on the original RMD amount.
Can RMD Age Change in the Future?
Legislation impacting RMD rules
Federal RMD requirements for TSP accounts are periodically updated through Congressional action. Over the past decade, significant retirement-related legislation such as the SECURE Act and subsequent amendments has led to multiple age increases, aiming to align rules with longer lifespans and evolving retirement trends.
Legislative action can update the required beginning age for RMDs, adjust calculation methods, and change penalties for missed distributions. The TSP, IRS, and federal retirement agencies generally publicize these changes.
Recent changes and official sources
Recent updates raised the TSP RMD age from 72 to 73 starting in 2023, and Congress may further increase it. The Office of Personnel Management (OPM), TSP.gov, and IRS.gov are the most reliable sources for new requirements. As a federal retiree or employee, staying up to date with official guidance ensures ongoing compliance and clarity in your retirement planning.
