Many tax advantages and contribution limits operate strictly on a calendar-year basis. Missing them can permanently forfeit deductions, tax credits, or company matching funds. 

Having late distributions can trigger steep penalties, while late contributions can mean lost compound on tax-deferred growth. Let’s go over these deadlines and what they can mean for you.

Key Deadlines at a Glance

December 31 Hard Deadlines

Employer-Sponsored Retirement Plans

• Pre-tax and Roth 401k, 403b, and Governmental 457b: Check you total employee deferrals against the annual limit ($24,500 base; standard catch-up is $8,000 for ages 50+; enhanced catch-up is $11,250 for ages 60 to 63)
• Payroll Lag Warning: Contributions cannot simply be wired, they must come from payroll. Coordinate with HR before the final December pay stub runs
• Employer Match Optimization: Verify that deferring a large lump sum at year-end does not cause you to miss monthly employer match formulas unless your plan provides a “true-up”

Required Minimum Distributions

• Age Thresholds: Mandatory starting at age 73
• The “First Year” Trap: If you turned 73 this year, you can delay your first distribution until April 1st of next year, but doing so means taking two RMDs in a single tax year; this may push you into a higher tax bracket
• Inherited IRAs: Review annual distribution rules under the 10-year rule for designated beneficiaries
• Qualified Charitable Distributions: For account owners age 701/2+, donating directly from an IRA to a qualified 501c3 counts toward the RMD without adding to your taxable income

Roth Conversions

• Timing: Funds must fully clear the traditional account into the Roth account by December 31st to apply to the current tax year
• Bracket Bumping Strategy: Calculate the room left in your current marginal income tax bracket to execute partial conversions without triggering higher Medicare IRMAA surcharges or capital gains tiers

Extended Deadlines

• Traditional and Roth IRAs: Contributions can be made up until the April 15th filing deadline and designated for the prior tax year($7,500 base, with $1,000 catch-up for age 50+)
• Health Savings Accounts: Individual contributions outside of payroll can be made up until April 15th to capture an above-the-line tax deduction
• Small Business and Self-Employed Plans:
• Solo 401k employee salary deferrals must be established/elected by December 31st, but employer profit-sharing contributions can be deposited by the business tax filing deadline
• SEP-IRA contributions can be established and funded up to the tax return extension deadline

Year-end financial planning isn't just about meeting IRS deadlines; it's about keeping more of your hard-earned wealth and setting the stage for a stress-free new year. Because processing times vary and custodians get overwhelmed in late December. taking action early is the key to locking in your deductions and avoiding steep penalties.

To make executing these steps effortless, we've synthesized all the key dates, thresholds, and accounts into a clear, one-page guide.

Click the button below to get your free copy, check off your final money moves, and enter January with total confidence in your financial future. If you have questions about which strategies best fit your unique situation, our team is always here to help.