1. IRA Contribution Deadlines (Tax Day)
IRA contributions have one of the most generous deadlines in the tax code. You can make contributions for a given tax year up until the tax filing deadline for that year, typically April 15th, without filing an extension. This means you have nearly 16 months to make IRA contributions for a single tax year. For example, 2024 IRA contributions can be made anytime from January 1, 2024, through April 15, 2025. This extended deadline provides valuable planning flexibility, especially for those expecting year-end bonuses or other windfalls. When making contributions between January 1st and Tax Day, be sure to specify which tax year the contribution applies to, or your IRA custodian will apply it to the current year by default. This deadline applies to both traditional and Roth IRAs, though income limits may restrict your ability to contribute to a Roth IRA directly.
2. 401(k) and Workplace Plan Deadlines
401(k) and other workplace retirement plans operate on a calendar year basis with strictly December 31st deadlines. Unlike IRAs, you cannot make contributions for the previous year after December 31st, even if you file a tax extension. This means all 401(k) contributions for 2024 must be made by December 31, 2024. The same deadline applies to 403(b) plans, 457 plans, and Thrift Savings Plans (TSP). These plans typically use payroll deductions, so your final 2024 contribution would come from your December 2024 paycheck. Some employers allow after-tax contributions or permit you to change your contribution amount mid-year, which can help maximize contributions before the deadline. If you're self-employed with a solo 401(k), you have until your business tax filing deadline (including extensions) to make employer contributions, though employee contributions are still due by December 31st.
3. HSA Contribution Deadlines
Health Savings Account (HSA) contributions follow the same flexible deadline as IRAs. You can make HSA contributions for a given tax year up until the tax filing deadline, typically April 15th. This extended deadline applies whether your HSA is through your employer or opened independently. For 2024, HSA contributions can be made through April 15, 2025. Like IRA contributions, you must specify which tax year the contribution applies to when making deposits between January 1st and Tax Day. HSAs offer triple tax advantages: tax-deductible contributions, tax-free growth, and tax-free withdrawals for qualified medical expenses. Understanding the HSA contribution deadline allows for strategic tax planning, especially if you have an unexpected medical expense or receive year-end income that could offset with an HSA contribution.
4. Catch-Up Contributions at Age 50
Once you reach age 50, the IRS allows you to make additional catch-up contributions to most retirement accounts, helping you accelerate your retirement savings in your final working years. These catch-up amounts are added to the regular contribution limits for each type of account. For 2024, the IRA catch-up contribution is $1,000, allowing those 50 and older to contribute up to $8,000 total to traditional or Roth IRAs. The 401(k) catch-up amount is substantially higher at $7,500, bringing the total potential contribution to $34,500 for those 50 and older. HSA catch-up contributions add $1,000 to the standard limit. These catch-up provisions recognize that many people need to save more aggressively as retirement approaches. The catch-up eligibility is based on your age at year-end, so if you turn 50 anytime during 2024, you're eligible for the full catch-up amount for that entire year.
5. 401(k) Catch-Up at Age 50
401(k) catch-up contributions are subject to the same December 31st deadline as regular 401(k) contributions. You must be age 50 or older by December 31st of the contribution year to be eligible. The catch-up amount for 2024 is $7,500, added to the regular $23,000 limit, for a total potential contribution of $30,500 if you're 50 or older. For 2025, these limits increase to $24,500 regular plus $8,250 catch-up for a total of $32,750. Beginning in 2025, workers aged 60-63 can make even larger catch-up contributions under new SECURE 2.0 provisions, while the catch-up for those 50-59 remains at the standard amount. Your employer may impose restrictions on catch-up contributions, such as requiring separate enrollment or limiting when you can change your contribution amount. Check your plan's specific rules and make any necessary elections well before year-end.
6. IRA Catch-Up Contributions
IRA catch-up contributions can be made up until the tax filing deadline, just like regular IRA contributions. This means you have until April 15th (or the filing deadline) to make IRA catch-up contributions for the previous tax year. The IRA catch-up amount is indexed to inflation but has remained at $1,000 for several years. For 2024, those 50 and older can contribute a total of $8,000 to traditional or Roth IRAs ($7,000 regular limit + $1,000 catch-up). Unlike 401(k) catch-ups, IRA catch-ups are not a separate election—simply contribute the total amount including the catch-up, and your IRA custodian will report the contribution correctly. Remember that income limits may restrict your ability to contribute directly to a Roth IRA, though a backdoor Roth conversion strategy may allow you to work around these limits. The catch-up eligibility applies to both traditional and Roth IRAs.
7. Coordination with RMDs After 72
Once you reach age 73, Required Minimum Distributions (RMDs) begin, creating a coordination issue with ongoing contributions to traditional retirement accounts. You cannot make traditional IRA contributions in the year you turn 73 and later if you have RMDs, unless you have earned income and are still working. Roth IRA contributions are allowed after RMDs begin, as Roth IRAs have no RMD requirements during your lifetime. However, you cannot contribute to a traditional IRA once RMDs have begun, regardless of whether you're still working. Workplace 401(k) contributions are an exception—if you're still working at age 73 and don't own more than 5% of the company, you can continue contributing to that employer's 401(k) even while taking RMDs from other accounts. Understanding these coordination rules helps maximize your retirement savings while meeting RMD obligations. Consider prioritizing Roth contributions in your final working years before RMDs begin.