If your income dropped this year because you sold a business, took time off, retired early, or absorbed a large deductible loss, you are sitting on an opportunity that will not last past December 31. A Roth conversion timing strategy built around a temporary dip in income can move tens of thousands of dollars from a traditional IRA into a Roth account while paying tax at a bracket you may never see again. Wait until January and the window closes for this tax year. This is why low income year Roth conversion planning belongs on your calendar right now, not in March when your CPA is buried in filing season.
We work with business owners and high income households across Miami-Dade County who assume Roth conversions only make sense in retirement. That is not true. The best conversion opportunities often show up mid-career, during a sabbatical, after a business sale that generated a large loss carryforward, or in the first year after relocating to Florida from a high tax state. The math is straightforward once you see it laid out, and running it before year end is the only way to actually capture the benefit.
What Is a Roth Conversion and Why Timing Matters
A Roth conversion moves money from a traditional IRA or old 401(k) into a Roth IRA. You pay ordinary income tax on the converted amount in the year of the conversion, and in exchange the funds grow tax free and come out tax free in retirement, with no required minimum distributions during your lifetime under current law.
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The entire strategy hinges on one variable: your marginal tax rate at the time of conversion versus your expected marginal tax rate when you would otherwise withdraw the money. If you convert while sitting in the 12% or 22% bracket instead of the 32% or 35% bracket you would face later, you have locked in a permanent discount on that tax bill.
Year end Roth planning matters because your marginal rate for 2026 is determined by your total taxable income for the full calendar year. A conversion executed on December 20 is taxed at 2026 rates. A conversion executed on January 5, 2027, is taxed at 2027 rates, using next year's income picture, which may look completely different if your income rebounds.
The 2026 Bracket Backdrop
The provisions from the 2025 tax legislation commonly called the One Big Beautiful Bill kept the seven bracket structure from the 2017 tax reform in place, along with the higher standard deduction. For many households this means the 22% and 24% brackets remain wider than they were before 2018, which creates more room to convert without pushing into the higher brackets.
Who Actually Has a Low Income Year
Not every dip in income is obvious. Some of the most common triggers we see in our Coral Gables office include:
- A business owner sells the company and the sale generates a large net operating loss or the proceeds are structured as an installment sale with minimal current year recognition.
- A professional takes an unpaid sabbatical or reduces hours for a health or family reason.
- A rental property owner has a large cost segregation study or bonus depreciation deduction that wipes out most of the year's income.
- A retiree has not yet started Social Security or pension income and is living on savings.
- Someone relocated to Florida mid-year from a high tax state and has a partial year of lower earned income before establishing a new business here.
If any of these describe your 2026, it is worth pulling your year to date numbers now, in September, while there is still time to act.
Running the Numbers: A Step by Step Approach
Step 1: Project Your 2026 Taxable Income Without a Conversion
Start with your actual income through September, then estimate the remaining months. Subtract the standard deduction or your itemized deductions to land on taxable income before any conversion.
Step 2: Identify How Much Room You Have in Your Target Bracket
Compare your projected taxable income to the top of the bracket you want to stay inside. The difference is your conversion capacity.
Step 3: Model the Conversion Amount Against Multiple Scenarios
Run at least three scenarios: no conversion, a conversion that fills the 12% bracket, and a conversion that fills the 22% or 24% bracket. Compare the total tax cost against your expected future withdrawal tax rate.
Step 4: Confirm You Have Cash Outside the IRA to Pay the Tax
Paying the conversion tax from the IRA itself defeats much of the benefit because you lose that portion of tax free growth, and if you are under 59 and a half, the amount used to pay tax may also trigger a 10% early withdrawal penalty.
Three Real Dollar Examples
Example 1: The business seller with a loss year. A Coral Gables restaurant owner sold her second location and the transaction generated a $95,000 loss after closing costs and equipment write offs. Her projected 2026 taxable income before any conversion is only $28,000. She has $2,000,000 in a traditional IRA. She converts $130,000, which fills up through the 22% bracket for a married filing jointly household. Tax on the conversion is roughly $22,300. If she had waited until a normal income year with a 32% marginal rate, the same $130,000 conversion would have cost approximately $41,600. That is a savings of $19,300 simply from timing.
Example 2: The retiree bridging to Social Security. A 63 year old Miami-area retiree has no earned income and has not started Social Security. Her taxable income for 2026, before conversion, is $14,000 from dividends. She converts $60,000, keeping her inside the 12% bracket for most of it and spilling slightly into 22%. Total tax is approximately $8,600. Without action, required minimum distributions starting at 73 would push much larger amounts into her return at a projected 24% to 32% rate, costing $14,400 to $19,200 on the same $60,000 in the future.
Example 3: The sabbatical professional. A South Florida attorney took a six month unpaid leave and earned only $52,000 in 2026 versus a typical $310,000. His standard deduction and retirement contributions bring taxable income to around $30,000. He converts $85,000 from an old 401(k) rollover IRA, paying roughly $14,700 in tax, all inside the 22% bracket. In a normal year at his usual 35% marginal rate, that same conversion would cost about $29,750, a difference of $15,050.
Comparison Table: Conversion Cost at Different Income Levels
| Taxable Income Before Conversion | Marginal Bracket | $50,000 Conversion Tax | $100,000 Conversion Tax |
|---|---|---|---|
| $20,000 | 12% | $6,000 | $13,700 approx |
| $60,000 | 22% | $11,000 | $22,000 |
| $150,000 | 24% | $12,000 | $24,000 |
| $250,000 | 32% | $16,000 | $32,000 |
| $450,000 | 35% | $17,500 | $35,000 |
These figures are approximations based on 2026 married filing jointly brackets and are meant to illustrate the pattern, not replace an actual projection run with your specific deductions and filing status.
Table: Common Low Income Triggers and Conversion Windows
| Trigger Event | Typical Duration of Low Income Window | Action Needed |
|---|---|---|
| Business sale with large loss | 1 tax year | Convert before December 31 of the sale year |
| Unpaid sabbatical or leave | 1 tax year | Convert before returning to full income |
| Retirement before Social Security | Multiple years until age 70 or benefit start | Convert annually during the gap |
| Relocation to Florida mid year | Partial year, sometimes 2 years | Convert once Florida residency is established |
| Cost segregation or bonus depreciation year | 1 tax year, sometimes 2 | Convert same year the deduction hits |
Why South Florida Residency Changes the Math
Florida has no state income tax, so a Roth conversion executed while you are a Florida resident avoids the state tax bite that would apply in New York, California, or New Jersey. Miami-area entrepreneurs who recently relocated from a high tax state should confirm their residency change is complete and documented before converting, since a mid year move can leave part of the conversion taxable in the old state under residency rules there.
This is one of the reasons South Florida business owners have an edge with year end Roth planning that residents of higher tax states do not enjoy. Pairing a no state income tax environment with a temporarily low federal bracket is about as favorable as conversion math gets.
Watch Out for These Interactions
A conversion increases your adjusted gross income, which can affect other parts of your return even in a low income year:
- Net investment income tax thresholds, which do not adjust for inflation and can be triggered by a large conversion combined with investment income.
- Affordable Care Act premium subsidies, if you or a family member is on a marketplace health plan, since a conversion can eliminate or shrink the subsidy for that year.
- The taxation of Social Security benefits, if you are already receiving them, since a large conversion can push more of your benefit into taxable income.
- Phase outs for certain credits and deductions tied to modified adjusted gross income.
This is exactly why we run a full return projection rather than looking at the conversion in isolation. A firm offering business tax strategy services should model these interactions before you file the conversion paperwork with your custodian, not after.
The December 31 Deadline Is Real
Unlike IRA contributions, which can be made up until the tax filing deadline, a Roth conversion must be completed by December 31 to count for the 2026 tax year. Custodians need processing time, often five to ten business days, so the practical deadline to initiate a conversion is closer to mid December. If you are reading this in September, you have time to project the numbers properly. If you wait until the last week of December, you are gambling on custodian turnaround times during the busiest week of the year.
How WAYG Approaches Roth Conversion Planning
Our Coral Gables headquarters serves Miami-Dade County business owners and individuals who need more than a generic rule of thumb. We build a full year projection using your actual year to date income, run multiple conversion scenarios side by side, and check the interactions with net investment income tax, ACA subsidies, and future required minimum distributions before recommending an amount.
For business owners, we also coordinate the conversion decision with your virtual CPA services engagement so quarterly estimated payments and withholding stay aligned. If your books are current through managed accounting or small business bookkeeping, we can pull accurate year to date figures in a single meeting instead of waiting weeks for reconciliation.
Frequently Asked Questions
Q: How do I know if I am actually in a low income year for Roth conversion purposes? A: Compare your projected 2026 taxable income to your average taxable income over the past three to five years. If this year is meaningfully lower due to a business sale, job loss, sabbatical, large deduction, or early retirement before Social Security starts, you likely have a genuine window. A quick projection using your year to date pay stubs, 1099s, and K-1 estimates will confirm it within an hour.
Q: Can I undo a Roth conversion if I change my mind after filing? A: No. The recharacterization option that once allowed taxpayers to reverse a Roth conversion was eliminated for conversions made after 2017. This makes it critical to run the numbers carefully before you convert rather than relying on an escape hatch afterward.
Q: Does a Roth conversion affect my quarterly estimated tax payments? A: Yes. The conversion adds to your taxable income for the year, which can increase your total tax liability and potentially your Q4 2026 estimated payment due January 15, 2027, or trigger an underpayment penalty if you do not adjust. We typically recalculate the safe harbor estimate as soon as the conversion amount is finalized.
Q: I am a South Florida business owner with a loss carryforward this year. Is there a limit to how much I can convert? A: There is no dollar cap on a Roth conversion itself, but converting more than your available bracket room means the excess gets taxed at higher marginal rates, reducing the benefit. The right amount is whatever fills your target bracket without spilling significantly into the next one, which is why we model it against your specific loss carryforward figure.
Q: What happens if my income for 2026 ends up higher than I projected in September? A: You still have time to adjust. Since the conversion deadline is December 31, we can revisit the projection in November or early December using more complete year to date numbers before you finalize the amount with your custodian.
Q: Is a Roth conversion still worth it if I already plan to leave the IRA to my children? A: Often yes, and sometimes even more so. Since the SECURE Act generally requires most non spouse beneficiaries to empty an inherited traditional IRA within 10 years, often at their own peak earning years' tax rates, a Roth conversion during your low income year can shift that future tax burden away from your heirs entirely, since inherited Roth accounts are typically distributed tax free.
The Bottom Line on Timing
Roth conversion timing is one of the few tax strategies where the calendar itself creates the opportunity. A low income year does not repeat on demand, and once December 31 passes, this year's bracket space is gone for good. If your 2026 income looks unusually low due to a business sale, career break, or major deduction, the smartest move is to get an actual projection done now, while there is still enough time to convert the right amount and pay the tax from outside funds.
Our team at WAYG's Coral Gables office works with business owners and individuals throughout Miami-Dade County to run these numbers before the year end deadline, not after. If you want a clear picture of how much you could convert and what it would actually cost at your income level, schedule a consultation with our team or request a quote to get started before the December 31 window closes.