Three Things to Close Before December 31, and One Thing to Stop Doing
Consider a surgeon who treats her year-end financial review the way she treats a slow week in the OR schedule: something to catch up on once things calm down in January. It is a reasonable instinct. It can also be a costly one.
January is too late for many—but not all—2026 planning decisions. For most workplace retirement-plan salary deferrals, the final payroll of the year is the practical deadline. Charitable gifts intended to generate a 2026 deduction generally must be completed by December 31, although the completion date depends on the asset and transfer method. Some contribution deadlines, including IRA contributions and certain employer retirement-plan contributions, may extend into 2027.
The fourth estimated-tax payment for 2026 is generally due January 15, 2027. That payment date does not make earlier estimated-tax installments timely, and it does not change income already recognized during 2026. For taxpayers who may be short of their required tax payments, however, additional federal income-tax withholding through final 2026 payroll can be particularly valuable because withholding is generally treated as paid evenly throughout the year for estimated-tax purposes.
Here is what may still have a live planning window right now.
Confirm Your Retirement Contributions Are Actually on Pace
For 2026, the elective-deferral limit for most 401(k), 403(b), governmental 457(b), and Thrift Savings Plan participants is $24,500, subject to plan terms and compensation limits. If the plan permits catch-up contributions, eligible participants age 50 or older may generally contribute up to $32,500 for the year.
Participants who turn age 60, 61, 62, or 63 during 2026 may qualify for a higher catch-up contribution. For eligible plans, that can bring the 2026 total employee contribution limit to $35,750, assuming the plan permits the enhanced catch-up.
These figures do not, by themselves, establish what someone can contribute or deduct. Plan documents, payroll timing, compensation limits, coordination with other employer plans, business structure, and nondiscrimination rules may all affect the amount available.
A cash-balance plan may also permit substantial employer contributions. However, the permissible and deductible contribution is actuarially determined and depends on factors including age, compensation, plan design, funding status, prior contributions, and applicable legal limits.
If you have not checked your year-to-date deferrals and remaining payroll capacity recently, this is the time to do it. For many employees, once final payroll has been processed, the opportunity to increase 2026 elective salary deferrals has passed.
Finish Charitable Giving You Intend to Complete in 2026
If a donor-advised fund contribution or direct gift of appreciated securities is part of your 2026 charitable plan, do not wait until the final days of December to begin the transfer process.
To claim a 2026 charitable deduction, a contribution generally must be completed by December 31, 2026. The relevant completion date depends on the asset and the method of delivery. For example, a properly endorsed stock certificate may be treated as delivered when mailed or delivered to the charity or its authorized agent, while electronically transferred shares may be subject to the policies and processing requirements of the receiving charity, donor-advised fund sponsor, custodian, transfer agent, or issuer.
The practical takeaway is simple: obtain the receiving organization’s year-end instructions early, confirm that it can accept the intended asset, and allow time for required forms, signatures, transfer processing, and acknowledgments.
Tax treatment also depends on the type of property contributed, holding period, recipient organization, adjusted gross income, substantiation, and whether the taxpayer itemizes deductions. A contribution limit or deduction rule that applies in one situation may not apply in another.
Confirm Withholding and Estimated-Tax Math Before Year-End
The fourth estimated-tax payment for 2026 is generally due January 15, 2027. But the deadline for making that payment should not be confused with the timing rules for estimated-tax installments and payroll withholding.
Consider a surgeon whose 2026 income is higher than projected because of a fourth-quarter practice distribution that was not included in the original tax estimate. Assume the surgeon’s prior-year federal income-tax liability was $310,000 and prior-year adjusted gross income exceeded $150,000. Under the prior-year safe-harbor rule, 110% of that liability is:
$310,000 × 110% = $341,000
If federal withholding and estimated payments through September total $315,000, the taxpayer may be short of the amount needed under that safe-harbor method.
A January 15 estimated-tax payment may satisfy or reduce the required fourth installment, but it generally cannot retroactively make earlier estimated-tax installments timely. The result depends on the taxpayer’s required installments, actual income pattern, prior-year adjusted gross income, and whether the annualized-income installment method applies.
Federal income-tax withholding is different. For estimated-tax purposes, withholding is generally treated as paid evenly throughout the year unless the taxpayer elects to use the actual withholding dates. Therefore, increasing withholding through remaining 2026 payroll may reduce or eliminate an estimated-tax underpayment penalty in appropriate circumstances, even when the added withholding occurs late in the year.
That does not mean every taxpayer should simply increase withholding. The analysis should account for projected 2026 total tax, prior-year tax, income received unevenly during the year, state estimated-tax obligations, payroll timing, and cash flow. The IRS annualized-income method may be particularly relevant when substantial income is received late in the year.
Do Not Leave the Review Until January
January remains an appropriate time to document results, prepare tax records, make certain contributions that remain eligible for a 2026 tax year, and finalize tax-return preparation. It is not the ideal time to first assess decisions that required action through 2026 payroll or by December 31.
A focused year-end review does not necessarily require a full afternoon. It often begins with:
A current pay stub and year-to-date payroll withholding
Confirmation of retirement-plan deferrals and remaining payroll opportunities
A rough estimate of full-year wages, practice income, investment income, and realized gains
A review of charitable gifts that must be completed before year-end
A preliminary federal and state tax-payment projection
The goal is not to predict every final tax number perfectly. It is to identify decisions that still have a meaningful window for action before that window closes.
You built a career on acting before a problem becomes irreversible, not after it. The same discipline applies to year-end financial planning. A financial plan, like a treatment plan, works best when key decisions are made while there is still time to act.
Capably Yours,
Jared
DISCLAIMER
This article is for informational and educational purposes only and does not constitute investment, tax, or legal advice. It does not take into account the specific objectives, financial situation, or needs of any particular person. You should consult your own tax, legal, and investment professionals before acting on any information contained herein. Capable Wealth, a New York registered investment adviser, provides advisory services only where properly licensed or exempt from licensing.