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The Fourth Quarter Is the Real Tax Season

The Fourth Quarter Is the Real Tax Season

September 29, 2026

Ask most people when tax season is, and they'll say April.

Ask a financial advisor who works with retirees and pre-retirees in South Florida, and you'll get a different answer: the fourth quarter. Because while April is when taxes get filed, October through December is when taxes actually get decided.

Most of the meaningful tax decisions a household can make have hard deadlines on December 31 — and every one of them is made easier by starting early rather than discovering it in the last two weeks of the year.

The moves worth making before December 31

1. Required Minimum Distributions (RMDs). If you're past the age where RMDs apply, the law requires a withdrawal from your traditional retirement accounts by December 31 — every year. Miss it and the penalty is one of the harshest in the tax code. If you have multiple accounts, inherited accounts, or you simply lost track during a busy year, this is the first item to verify.

2. Qualified Charitable Distributions (QCDs). For those who are charitably inclined and past the required distribution age, a QCD sends IRA money directly to charity — and it counts toward the RMD without ever showing up as taxable income. It's one of the most elegant tools in retirement tax planning, and it only works if it's done before year-end.

3. Roth conversion sizing. A Roth conversion moves money from a traditional IRA to a Roth IRA, paying tax now in exchange for tax-free growth and no RMDs on the converted money in the future. The question is never whether the strategy exists — it's how much to convert in a given year. Convert too little and you leave tax-free space unused. Convert too much and you push yourself into a higher bracket or trigger Medicare premium surcharges. That sizing math takes time to run properly, which is exactly why October, not December, is when it should happen.

4. Tax-loss harvesting. In a down or sideways market, positions trading below their purchase price can be reviewed for opportunities to realize losses that offset gains elsewhere. Done thoughtfully — without wrecking your long-term allocation — it can lower this year's tax bill while keeping your plan intact.

5. The beneficiary and contribution sweep. Roth IRA contributions, 529 funding, and the beneficiary designations on every account you own. The last one is the most neglected: a beneficiary form overrides your will, and outdated designations are one of the most common estate mistakes I see.

The fourth-quarter paradox

Here's what makes this season unusual: every one of these moves is optional, and every one of them is impossible to retroactively decide. In April, you're reporting what already happened. In October, you're still choosing what will.

That difference — between reporting and choosing — is the entire value of year-end planning. And the households that treat the fourth quarter as their real tax season are, year after year, the ones that keep more of what they've built.

If you're retired, approaching retirement, or simply haven't had a conversation about where your taxes could be by December 1, this is the week to start it. Not because April isn't coming. Because by April, it's already too late to matter.

Ready to run your year-end plan while it can still change?Schedule a complimentary consultation.

This article is for educational purposes only and does not constitute investment, tax, legal, or insurance advice. Securities and advisory services offered through Cetera Advisors LLC, member FINRA/SIPC. Advisory services offered through Cetera Investment Advisers LLC. Please consult a qualified financial professional regarding your individual circumstances.