Traditional IRA to Roth Conversion: The Strategic Guide

What Is a Traditional IRA to Roth Conversion?

The Core Mechanics

The investor instructs their IRA custodian to move assets from a traditional IRA to a Roth IRA through a direct trustee-to-trustee transfer. The amount moved is generally treated as a taxable distribution in the conversion year, though the funds never leave the IRA system. The custodian issues Form 1099-R. The investor reports the conversion on Form 8606. Federal tax is generally due by April 15 of the following year, with state tax applied separately. Once inside the Roth, qualified distributions are generally tax-free provided the account has been open at least five tax years and the investor is at least 59.5. Under current law, there are no required minimum distributions on the Roth during the original owner's lifetime.

Four Levers That May Influence the Tax Bill

Timing the conversion to a lower-income year may potentially reduce the marginal rate. Converting up to the ceiling of the current bracket each year may spread income across multiple tax years. Paying the tax from outside the IRA generally preserves the full converted balance inside the Roth. Converting a privately-valued asset with an established NAV discount may potentially reduce the taxable basis directly.

Pay the conversion tax with outside capital. Pulling the tax from the IRA generally creates a second taxable distribution, reduces the Roth balance, and may trigger a 10% early withdrawal penalty if the owner is under 59.5. Investors without liquid capital outside the IRA may want to discuss timing with a CPA before converting.

What Is the “Loophole” for Traditional IRA to Roth Conversion?

There is no loophole. A traditional IRA to Roth conversion is a tax-code-defined event under Internal Revenue Code Section 408A. The conversion mechanism has been in the statute since 1997 and is operated openly through every major IRA custodian. The “loophole” framing typically appears in search results because investors borrow the word from headlines about other tax strategies, not because the conversion itself depends on any obscure carve-out.

When the term does surface in this context, it generally refers to one of three planning patterns layered on top of the standard conversion mechanics.

The NAV discount strategy. When a traditional IRA holds an interest in a privately-valued real estate fund or syndication, the taxable conversion amount is generally the third-party appraised value reported by the IRA custodian, not the nominal capital account. A sponsor-disclosed discount documented by an independent appraisal firm may potentially lower the taxable basis at conversion. This is one planning pattern the phrase is sometimes associated with, and it is more accurately described as a valuation framework grounded in Revenue Ruling 59-60. See our deep dive on the Roth conversion loophole hiding in private real estate.

The backdoor approach for high earners. Investors whose income exceeds the Roth contribution phaseouts are generally blocked from direct Roth contributions, but conversions have no income limit under current law. A non-deductible contribution to a traditional IRA followed by a conversion to Roth is commonly referred to as a “backdoor” strategy. The mechanics are governed by the same Section 408A rules. See our guide on the mega backdoor Roth conversion for the workplace-plan version.

The timing arbitrage between bracket years. Converting during a low-income window (early retirement, sabbatical, business wind-down) at the 12% or 22% bracket, when future income is expected to land in the 24% or 32% bracket once Social Security and required minimum distributions begin, may potentially capture a meaningful spread on every converted dollar. The mechanics are ordinary conversion mechanics; the leverage is timing. See our guide on when to do a Roth conversion for the sweet-spot framework.

The takeaway: when an investor searches for the “loophole,” the underlying question is usually one of these three planning patterns. The conversion itself is straightforward. The opportunity is in how the conversion is timed, sized, and valued.

The Traditional IRA to Roth Conversion Rules

Six rules generally govern every Roth conversion. Each rule is independent. All are generally applied strictly under current law.

Rule 1: There Are Generally No Income Limits on Roth Conversions

Under current law, Roth conversions generally have no income limit. Roth IRA contributions phase out for high earners (approximately $150,000 for single filers and $236,000 for married filing jointly in 2026), but conversions generally do not. Any investor with a traditional IRA may potentially convert any amount regardless of their income. This is one reason the “backdoor Roth” strategy exists, though the pro-rata rule complicates that path for investors with existing deductible IRA balances.

Rule 2: The Entire Converted Amount Is Generally Taxed as Ordinary Income in the Conversion Year

The amount of a conversion from a fully-deductible traditional IRA is generally taxable as ordinary income in the conversion year. There is generally no preferential capital gains rate. The conversion generally lands in the same bracket as wages and pension income. Investors with nondeductible contributions may have partial tax basis that affects the taxable amount under the pro-rata rule.

Rule 3: Annual RMDs Are Generally Required to Be Satisfied Before Converting in the Same Year

Once an investor reaches required minimum distribution age, the year's RMD is generally required to be taken before any additional amount can be converted. The RMD itself is generally not eligible for conversion. Under SECURE 2.0, RMD age is generally 73 for investors born between 1951 and 1959, and 75 for those born in 1960 or later.

Rule 4: Roth Conversions Are Generally No Longer Recharacterizable (Since 2018)

The Tax Cuts and Jobs Act of 2017 is generally understood to have eliminated the ability to recharacterize (undo) a Roth conversion for conversions executed in tax years after 2017. Conversions are generally treated as permanent as of the conversion date, which makes timing and amount decisions more consequential than they were under the prior rules.

Rule 5: Converted Funds Are Generally Subject to the 5-Year Holding Rule for Penalty-Free Access

Each conversion generally starts a separate five-year clock. Converted principal is generally accessible penalty-free after five years from January 1 of the conversion year. For investors under 59.5, withdrawing converted principal before the clock clears may trigger a 10% penalty. The Roth IRA's overall seasoning clock generally governs whether earnings come out tax-free. See our Roth conversion 5-year rule breakdown.

Rule 6: Pro-Rata Rule Generally Applies If the Investor Has Nondeductible IRA Contributions

If the investor has a mix of deductible and nondeductible contributions across all traditional IRAs, each converted dollar is generally treated as a proportionate blend of taxable and nontaxable amounts. The pro-rata rule generally prevents an investor from converting only the after-tax basis tax-free. The dedicated section below covers the math.

When a Traditional IRA to Roth Conversion Makes Strategic Sense

The decision rests on a single comparison: the marginal rate today versus the rate the investor expects later. Four scenarios surface that comparison cleanly.

The Current Tax Rate Is Lower Than the Expected Future Rate

A retiree in the 22% bracket today who expects to be in the 32% bracket once Social Security and RMDs begin has a clean conversion case. Converting at 22% may save the 10-point spread on every dollar moved.

The Investor Wants to Reduce Future RMDs

Under current law, Roth IRAs are generally not subject to RMDs during the original owner's lifetime. For a 68-year-old with a $500,000 traditional IRA compounding at 5%, the RMD that begins at 73 will generally be substantial and grow each year. Converting before RMD age may materially reduce that burden. See our Roth conversion to avoid RMDs guide.

The Investor Wants to Leave a Tax-Free Inheritance

Heirs who inherit a Roth IRA are generally subject to the SECURE Act 10-year distribution window, but distributions are generally tax-free. Heirs who inherit a traditional IRA face the same window and generally pay ordinary income tax on every dollar. See our guide on inherited IRA Roth conversion under the SECURE Act.

The Investor Has a Low-Income Gap Year

The conversion window may open any time income drops substantially. Year one of retirement (after the final paycheck, before Social Security, before RMDs) is often the widest bracket-filling window an investor will see in a decade. The same logic generally applies to a career break, sabbatical, parental leave, or business wind-down year. A “creeping conversion” across multiple low-rate years is a commonly discussed execution pattern: convert a portion each year over three to five years, sized to fill the current bracket without exceeding it.

When Converting May Not Make Sense

Three counter-scenarios surface the most common mistakes.

The investor is already in a high bracket with no low-income years ahead. Converting at 32% to avoid RMDs the investor may never live to take is not necessarily favorable. Investors at the top of the rate schedule with no expected income drop generally have less to gain than the general marketing material suggests.

The investor will need the IRA funds within 5 years. Converted principal is generally subject to a five-year holding period for penalty-free access under age 59.5. The investor may pay tax today and a 10% penalty on the withdrawal before the clock clears.

The investor does not have liquid assets outside the IRA to pay the tax. Paying from inside the IRA generally reduces the Roth balance and may trigger a 10% early withdrawal penalty for owners under 59.5. Investors without outside funds may want to discuss timing with a CPA before converting.

The NAV Discount Strategy: Lowering the Tax Cost of the Conversion

A Roth conversion is generally taxed on the fair market value of the asset converted. For an illiquid privately-held interest such as a real estate syndication or fund LP position, fair market value is generally understood to reflect the lack-of-marketability and minority-interest characteristics that a third-party appraisal firm documents.

The sponsor engages the appraisal firm. The appraiser generally applies the Revenue Ruling 59-60 framework. The sponsor reports the discounted value to the IRA custodian, which carries it on the investor's account statements. At conversion, the taxable basis is generally the custodian-reported appraised value, not the nominal cost. Investors generally do not commission their own appraisal.

Discount magnitudes vary by vehicle and offering. Ground-up development funds have historically carried lack-of-marketability discounts in the 25-40% range, and oil and gas drilling funds in the 40-60% range. Past sponsor-disclosed ranges are not indicative of future discount availability on any specific deal. See the complete guide to discounted Roth conversions.

Worked Example A: Nancy Converts $320K at 50% Discount

Consider the following hypothetical for illustrative purposes only. Nancy is 63, married filing jointly. She has $320,000 in a traditional IRA rolled over from her former employer's plan, a $38,000 pension, and has not yet started Social Security. She converts into an oil and gas drilling fund LLC membership interest that will fund the drilling of a series of horizontal wells. Drilling fund LLC interests typically carry larger lack-of-control and lack-of-marketability discounts than stabilized real estate because the underlying reserves deplete over time, commodity prices fluctuate, the production curve is uncertain through the drilling and completion phases, and there is no secondary market for the LLC interest.

The sponsor's appraisal firm establishes a 50% NAV discount, within a typical 40 to 60% range for drilling fund LLC interests, on Nancy's $320,000 LLC interest and reports a $160,000 value to the IRA custodian.

Nancy executes a creeping conversion across four years. Each year, $64,000 of the nominal LLC interest is converted at a $32,000 discounted basis. At a 22% federal marginal rate, the tax on each year's conversion would be approximately $7,040, for a four-year total of approximately $28,160. The same $64,000 per year converted at full value would have generated approximately $56,320 across four years. Illustrative federal tax savings from the discount: approximately $28,160. Nancy pays each year's tax from savings outside the IRA.

Hold and distributions. Over the fund's life, production distributions plus any potential residual reserves value at fund termination would flow back to Nancy's Roth IRA, and subsequent qualified distributions from the Roth would generally be income-tax-free. All investments carry risk, including the loss of principal. Investors should read the risk factors in the private placement memorandum for each offering before investing.

Worked Example B: Richard Converts $180K at 40% Discount

Consider the following hypothetical for illustrative purposes only. Richard is 34, single, in the 32% bracket as a senior engineer. He has a $180,000 traditional IRA from a former 401(k) rollover and direct contributions starting at age 24. He is planning a one-year sabbatical at 36, during which his income will drop to approximately $10,000 of interest and dividends.

Richard converts during his sabbatical year using a ground-up multifamily development syndication. The sponsor's appraisal firm establishes a 40% NAV discount on Richard's $180,000 LP interest and reports a $108,000 value to the IRA custodian.

After the standard deduction, taxable income before conversion is effectively zero. The $108,000 conversion brings taxable income to approximately $108,000, which for a single filer fills the 10%, 12%, 22%, and 24% brackets in sequence. Stepping through the 2026 single-filer brackets, the estimated federal tax is approximately $18,500. Converting the same $180,000 at full nominal value in the same low-bracket year would have stepped through the same brackets and generated approximately $35,800. Converting at his normal 32% bracket (no discount) would have generated approximately $57,600. Combined illustrative savings from bracket selection plus the NAV discount, measured against the normal-bracket full-value case: approximately $39,100. Richard pays the approximately $18,500 conversion tax from a taxable brokerage account.

The development project exits in year seven. The capital return lands inside the Roth IRA. He may ladder additional conversions of his remaining traditional IRA balance in future low-income years. The 40% discount is an educational illustration.

How Much Tax Will a $50,000 Roth Conversion Cost? Worked Examples at $50K, $100K, $250K

Consider the following illustrative persona. A married couple filing jointly, both spouses age 62, both retired, with $80,000 of other taxable income (a mix of pension, the taxable portion of Social Security, and qualified dividends from a brokerage account). After the 2026 MFJ standard deduction of $32,200, pre-conversion federal taxable income is approximately $47,800, sitting comfortably in the 12% bracket. The 12% MFJ bracket runs through $100,800 of taxable income, leaving roughly $53,000 of headroom before the 22% bracket kicks in. We picked $50K, $100K, and $250K to walk through three distinct dynamics: a conversion that stays inside the 12% bracket, a conversion that straddles 12% and 22%, and a conversion that crosses three brackets and pierces the NIIT and IRMAA tripwires.

Illustrative figures only. Actual tax outcomes depend on individual circumstances; consult a qualified tax advisor.

Federal income tax on the conversion only. Persona: MFJ, both spouses age 62, $80,000 other taxable income, 2026 MFJ standard deduction $32,200. Figures from IRS Revenue Procedure 2026 inflation adjustment release, IRS Topic 559 (NIIT), and Medicare.gov 2026 Medicare Costs publication. State tax and AMT not modeled.

The $50,000 conversion stays entirely inside the 12% bracket. Pre-conversion taxable income of $47,800 plus the full $50,000 conversion lands at $97,800, still below the $100,800 top of the 12% bracket. The discount lowers the tax proportionally because there is no bracket creep to escape. The $100,000 conversion straddles the boundary: roughly $53,000 of the conversion fills the remaining 12% bracket headroom, and the rest spills into the 22% bracket. The NAV discount earns outsized leverage here, because every discounted dollar pulled back below the $100,800 line may fall in the 12% bracket instead of the 22% bracket. At a sponsor-disclosed discount of that magnitude, the conversion could sit back inside the 12% bracket.

The $250,000 conversion crosses three brackets (12%, 22%, 24%) and pushes MAGI above the $250,000 MFJ threshold for the 3.8% Net Investment Income Tax. The conversion itself is ordinary income and is not subject to NIIT, but a higher MAGI can pull existing dividends, interest, and other investment income in the $80,000 base above the threshold. The same conversion also pierces the first IRMAA bracket of $218,001 MAGI (MFJ) and the second IRMAA bracket of $274,001 MAGI (MFJ), which could generate Medicare Part B and Part D surcharges for couples already enrolled in Medicare. Persona caveat: at age 62 neither spouse is yet on Medicare (eligibility begins at 65), so IRMAA does not apply to this specific conversion. The IRMAA dynamic is shown as an at-age-63-plus sensitivity for couples within the 2-year IRMAA lookback window before Medicare enrollment. A 40% to 50% NAV discount may potentially keep the couple below both the NIIT and IRMAA tripwires in addition to reducing the federal income tax on the conversion itself.

These calculations are illustrative. Actual tax outcomes depend on the investor's specific situation, including state tax, the mix of investment income inside the base income, the Social Security taxation interaction, and the specific IRMAA lookback year. Investors should consult a qualified tax advisor before executing any Roth conversion. NAV discount availability is offering-dependent; investors may want to consider offerings that include sponsor-disclosed discounted valuations supported by a qualified independent appraisal.

The Pro-Rata Rule: The Most Common Mistake

If the investor has both deductible and nondeductible contributions across all traditional IRAs, each converted dollar is treated as a proportionate blend of taxable and nontaxable amounts. The rule applies to the aggregate balance of all traditional IRAs. An investor with $90,000 of pre-tax and $10,000 of after-tax contributions (a $100,000 aggregate) converts each dollar at 90% taxable and 10% nontaxable. A $10,000 conversion intended to pull only the after-tax basis is treated as $9,000 taxable and $1,000 nontaxable.

This is why the backdoor Roth strategy works cleanly only when the investor has no other traditional IRA balances. A $200,000 deductible balance plus a $6,500 nondeductible contribution produces a $206,500 aggregate. The $6,500 conversion triggers pro-rata, and only 3.15% is treated as nontaxable.

Two options to handle existing nondeductible basis. The investor can roll the pre-tax balance into a current employer's 401(k), if the plan accepts incoming rollovers, leaving only the after-tax basis in the traditional IRA. Otherwise, the investor accepts pro-rata treatment and tracks basis on Form 8606 across future years.

General Execution Steps

The following describes the general process. Individual circumstances vary. Consult a qualified tax professional before taking action.

1. Open or confirm a Roth IRA at the receiving custodian. For a private real estate fund interest, the converted asset is generally required to sit at a self-directed IRA custodian that accepts alternatives.
2. Request a direct trustee-to-trustee transfer. The 60-day indirect rollover is generally avoided in practice because it triggers 20% mandatory withholding the investor is generally required to make up from outside funds.
3. Confirm appraisal documentation if converting a private real estate position. The custodian-reported discounted value generally becomes the taxable basis. Investors generally do not commission appraisals individually.
4. Report on Form 8606 and pay tax by April 15. For large conversions, investors may want to discuss adjusting withholding or making estimated tax payments with their CPA.

FAQ: Traditional IRA to Roth Conversions

Considerations When Evaluating a Conversion

A traditional IRA to Roth conversion is generally a tax-rate arbitrage decision. The math may work when the rate today is lower than the rate later, when outside capital is available to pay the conversion tax, and when the holding window justifies the upfront cost. Bracket management, RMD planning, and the source of the assets being converted all may change the answer. Roth conversions are generally irreversible under current law because the Tax Cuts and Jobs Act is generally understood to have eliminated recharacterization for conversions made after 2017.

Investors with a traditional IRA or rollover IRA evaluating a conversion may want to model the math at different bracket scenarios using the Roth conversion calculator, or set up a time to talk with Anchor1031 about the private real estate investments that may fit your strategy.

Sources

This article references the following IRS publications and Internal Revenue Code sections.

• 26 U.S.C. Section 408A, Roth IRAs (Cornell Law)
• 26 U.S.C. Section 408, Individual Retirement Accounts (Cornell Law)
• 26 U.S.C. Section 401(a)(9), Required Minimum Distribution rules
• IRS Form 8606, Nondeductible IRAs
• IRS Publication 590-A, Contributions to Individual Retirement Arrangements
• IRS Publication 590-B, Distributions from Individual Retirement Arrangements
• Revenue Ruling 59-60, Valuation of Closely Held Stock
• SECURE 2.0 Act of 2022, RMD age changes and related provisions
• Tax Cuts and Jobs Act of 2017, elimination of Roth recharacterization