A Schwab Roth conversion transfers money from your traditional IRA to a Roth IRA — you pay income tax on the converted amount in the year of conversion, and the money grows permanently tax-free. Schwab makes the mechanics straightforward through an online IRA conversion process. The strategy — deciding how much to convert and when — requires understanding your current and expected future tax rates.
What Is a Roth Conversion?
A Roth conversion is the process of moving money from a traditional IRA (or other pre-tax retirement account) into a Roth IRA. The converted amount is added to your taxable income for the year — you pay the tax now, and the money grows tax-free from that point on. There are no income limits on Roth conversions, and no limit on how much you can convert in a single year.
2026 Tax Brackets: Planning Your Conversion Amount
The goal of most Roth conversions is to convert just enough to fill a lower tax bracket without pushing income into a higher one.
2026 Federal Income Tax Brackets — Single Filer
| Rate | Taxable Income |
|---|---|
| 10% | $0 – $11,925 |
| 12% | $11,926 – $48,475 |
| 22% | $48,476 – $103,350 |
| 24% | $103,351 – $197,300 |
| 32% | $197,301 – $250,525 |
| 35% | $250,526 – $626,350 |
| 37% | Over $626,350 |
2026 Federal Income Tax Brackets — Married Filing Jointly
| Rate | Taxable Income |
|---|---|
| 10% | $0 – $23,850 |
| 12% | $23,851 – $96,950 |
| 22% | $96,951 – $206,700 |
| 24% | $206,701 – $394,600 |
| 32% | $394,601 – $501,050 |
| 35% | $501,051 – $751,600 |
| 37% | Over $751,600 |
The 2026 standard deduction is $15,000 for single filers and $30,000 for married filing jointly — subtract this from gross income to find your starting taxable income before the conversion.
Worked Example: Filling the 12% Bracket
A married couple retires early in 2026 with $40,000 in Social Security and pension income. Their taxable income after the $30,000 standard deduction is $10,000 — well inside the 10% bracket. The top of the 12% bracket is $96,950.
- Room remaining in the 12% bracket: $96,950 − $10,000 = $86,950
- They convert $86,950 from their traditional IRA to a Roth IRA
- All $86,950 of converted income is taxed at 10%–12% — never above 12%
- The money now grows tax-free, and future Roth withdrawals won’t push them into higher brackets in their 70s and 80s
The Pro-Rata Rule: The Critical Complication
If you have any pre-tax money in any traditional IRA, the IRS applies the pro-rata rule to conversions. You cannot choose to convert only after-tax money — the IRS treats all traditional IRA balances (across all IRAs) as one pool and applies a proportional tax.
Example: You have $90,000 pre-tax and $10,000 after-tax (non-deductible contributions) in traditional IRAs. You convert $10,000.
- 90% of the conversion ($9,000) is taxable
- 10% ($1,000) is tax-free
- You cannot convert only the after-tax portion
The pro-rata rule is why the backdoor Roth IRA requires either having no pre-tax IRA balance or first rolling it into an employer 401(k) plan to “clear” the IRA of pre-tax money.
Five Roth Conversion Strategies
1. Bracket-filling conversion — Convert up to the top of your current tax bracket each year. Best for retirees with temporarily low income.
2. Roth conversion ladder — Convert a set amount every year for 5+ years to build a pool of penalty-free Roth funds accessible after a 5-year aging period. Popular with FIRE (Financial Independence, Retire Early) practitioners.
3. Low-income year conversion — Convert a large lump sum in a year when income drops: job loss, sabbatical, early retirement, gap year. Maximizes the tax-rate advantage.
4. Pre-RMD conversion — Convert before age 73 (or 75) when required minimum distributions (RMDs) begin. RMDs push income up; pre-converting reduces future RMD amounts and future tax burden.
5. Social Security gap conversion — If you delay Social Security to age 70 for a larger benefit, the years between retirement and Social Security receipt are often the lowest-income years of retirement — ideal for large conversions.
The 5-Year Rules
Two separate 5-year rules apply to Roth accounts:
Rule 1 — Earnings: Roth IRA earnings (growth) can be withdrawn tax-free only if the account has been open for at least 5 years (counted from January 1 of the year of the first Roth IRA contribution or conversion). This clock is per person, not per conversion.
Rule 2 — Converted principal (under 59½): Each conversion has its own 5-year clock. If you withdraw converted principal within 5 years of the conversion AND you are under 59½, you owe the 10% early withdrawal penalty on that amount. After 59½, this rule does not apply — converted principal can be withdrawn at any time penalty-free once you’re past 59½.
Practical impact: If you are over 59½, the 5-year rule on converted principal does not affect you. If you are under 59½ and using a Roth conversion ladder for early retirement income, plan for a 5-year delay before tapping each conversion without penalty.
What a Roth Conversion Does NOT Include
- Roth conversion does not count toward your Roth IRA contribution limit ($7,000 / $8,000 in 2026). Conversions and contributions are tracked separately.
- You cannot convert a required minimum distribution (RMD). If you are 73+ (or 75+ under SECURE 2.0 for those born in 1960 or later), you must first take your annual RMD before converting any additional amount.
- No undoing conversions. The TCJA 2017 eliminated the ability to recharacterize (undo) Roth conversions. Once converted, the tax is owed.
How to Execute a Roth Conversion at Schwab
- Log in to schwab.com and navigate to your traditional IRA account
- Find the Roth Conversion option — look under “Transactions,” “Transfer/Rollover,” or Schwab’s dedicated IRA Conversion Center
- Specify the amount — enter a dollar amount or elect to convert the full balance; partial conversions of any size are allowed
- Elect tax withholding — Schwab offers federal and state withholding options; most investors choose no withholding and pay taxes from outside the IRA
- Review and submit — Schwab shows a confirmation screen before executing; conversions typically settle within one business day
- Report on Form 8606 — Schwab issues Form 1099-R for the conversion; you file Form 8606 with your tax return to track the basis and report the income
Schwab-Specific Considerations
Schwab Intelligent Portfolios after conversion: Once converted to a Roth IRA at Schwab, the balance can be enrolled in Schwab Intelligent Portfolios (minimum $5,000) for automated, diversified management at no advisory fee. This makes Schwab particularly appealing for set-it-and-forget-it Roth savers.
Roth IRA must exist first: If you don’t have an existing Schwab Roth IRA, open one before initiating the conversion. Opening takes about 10 minutes online.
In-plan conversions: If you hold a Schwab Individual 401(k) (solo 401(k)), conversions happen within the plan — pre-tax solo 401(k) balances can often convert to the Roth solo 401(k) side. This is separate from IRA conversions.
thinkorswim access: After converting, Schwab Roth IRA balances can be traded on thinkorswim — Schwab’s advanced trading platform — for investors who actively manage their portfolio.
Timing Your Schwab Roth Conversion
The best time to convert is when your taxable income is temporarily low. Common windows:
- Early retirement years before Social Security or RMDs begin
- Years with unusually high deductions (large charitable contributions, business losses)
- Sabbatical or career gap years with no earned income
- Before you turn 73 (or 75) when RMDs begin and push income up
Because Schwab shows real-time account balances and Schwab’s tax resources can help estimate bracket impact, you can calculate a precise conversion amount at year-end once you know your final income picture.
When a Roth Conversion Pays Off
| Your Situation | Conversion Verdict |
|---|---|
| Currently in 12% bracket, expect 22%+ in retirement | Strong yes |
| In same bracket now and in retirement | Break-even; consider other factors |
| Large traditional IRA with few heirs | Yes — reduce RMD pressure |
| Heirs in high tax brackets | Yes — they inherit tax-free |
| You need funds to pay the tax | Proceed cautiously |
| Already in 35% or 37% bracket | Typically not — wait for a lower-income year |
Related Schwab Guides
- Schwab Backdoor Roth IRA 2026 — Step-by-Step Guide
- Schwab Roth IRA 2026 — Limits, Rules & How to Open
- Schwab Traditional IRA 2026 — Deduction Rules & Limits
- Schwab Inherited IRA 2026 — 10-Year Rule, RMDs & How to Open
- Charles Schwab — Complete Investor Guide 2026
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