Retirement & Tax Planning
Roth Strategy for High Earners
You may earn too much for a direct Roth IRA. You do not earn too much for Roth planning.
A high income can close the front door to a direct Roth IRA contribution, but it does not close every legal route into Roth money.
Roth planning matters because it offers:
- Tax-free qualified growth and withdrawals
- Protection against future tax-rate uncertainty
- Retirement tax diversification
- No required minimum distributions for the original owner
- Greater flexibility for some heirs
- The ability to move money during strategically favorable tax years
The objective is not "Roth at any price." The objective is deciding which Roth door is available and whether using it improves the household's lifetime tax result.
Seven Legal Doors Into Roth Money
1. Direct Roth IRA
Direct Roth IRA eligibility is restricted by modified adjusted gross income. The 2026 phaseout ranges are:
| Filing Status | Phaseout Range |
|---|---|
| Single or Head of Household | $153,000 to $168,000 |
| Married Filing Jointly | $242,000 to $252,000 |
These limits affect direct Roth IRA contributions, not every Roth strategy.
2. Roth 401(k) or 403(b)
Designated Roth workplace-plan contributions do not have the Roth IRA income cap. The 2026 employee elective-deferral limit is$24,500.
The employee deferral limit is shared across the person's applicable 401(k) and 403(b) plans. Opening another plan does not create a second employee-deferral limit.
Whether to direct workplace contributions to Roth or pre-tax depends on the household's current marginal rate versus expected future rates. Roth is not universally superior.
3. Backdoor Roth IRA
The basic three-step process:
- Make a nondeductible traditional IRA contribution.
- Document the after-tax basis, normally using IRS Form 8606.
- Convert the traditional IRA amount to a Roth IRA.
The 2026 IRA contribution limit is$7,500before any applicable age-based catch-up contribution.
The Pro-Rata Rule
An investor has $192,500 of pre-tax money across traditional, SEP, and SIMPLE IRAs and makes a new $7,500 nondeductible contribution. The combined IRA balance is $200,000, of which only 3.75% is after-tax basis. If $7,500 is converted, approximately $281 would be treated as tax-free basis and approximately $7,219 would generally be taxable.
- The calculation generally aggregates traditional, SEP, and SIMPLE IRAs.
- A 401(k) is not included in that IRA aggregation.
- A spouse's IRA balances are separate.
- Form 8606 documentation is essential.
Before Using the Backdoor
- Review all traditional, SEP, and SIMPLE IRA balances
- Confirm contribution eligibility and limits
- Confirm whether the contribution is deductible or nondeductible
- Prepare Form 8606 correctly
- Plan for any taxable conversion income
- Coordinate execution with the tax professional and custodian
4. Mega-Backdoor Roth
This strategy uses voluntary after-tax 401(k) contributions, which are different from both pre-tax and designated Roth salary deferrals. The 2026 overall defined-contribution annual-additions limit is$72,000before any applicable catch-up contribution.
Two required plan gates:
- The plan must accept voluntary after-tax employee contributions.
- The plan must allow an in-plan Roth conversion or an in-service distribution that provides an effective Roth exit.
Five Questions to Ask HR or the Plan Administrator
- Does the plan accept voluntary after-tax contributions beyond the normal employee deferral?
- Does it allow automatic or frequent in-plan Roth conversions?
- If not, are in-service rollovers to a Roth IRA permitted, and how often?
- How do employer contributions affect the remaining annual-additions capacity?
- Are highly compensated employee testing, plan limits, or payroll restrictions likely to reduce the amount?
Earnings accumulating before conversion are generally pre-tax and can create taxable income when moved to Roth. Frequent conversion may reduce that exposure if the plan permits it.
5. A $500,000 Earner Example
Hypothetical 45-year-old earning $500,000 (illustrative, not guaranteed):
Actual capacity can be lower because of plan design, employer contributions, compensation limits, testing, payroll rules, and other plan-specific restrictions.
6. Spouses, Side Businesses, and Common Myths
- Spouse income limit:A spouse does not bypass the married-filing-jointly Roth IRA income limit.
- Spousal IRA:A nonworking or lower-earning spouse may be able to fund an IRA under the spousal IRA rules when the couple files jointly and has sufficient combined compensation.
- Separate calculations:Each spouse has a separate IRA and a separate pro-rata calculation.
- No side job required:A side job is not required for a normal backdoor Roth IRA.
- Owner-only 401(k):Requires a legitimate trade or business with real earned income.
- Shared deferral limit:A second 401(k) does not create a second $24,500 employee-deferral limit.
7. Taxable Roth Conversions
There is no income cap on converting eligible pre-tax retirement money to Roth. The untaxed amount converted is generally ordinary income in the conversion year. A conversion is generally irreversible.
Bracket Filling: Convert to a Target, Not a Round Number
The target should reflect filing status, deductions, capital gains, credits, Medicare, state taxes, and current law.
The strongest conversion windowis often after earned income falls but before pensions, Social Security, and required minimum distributions fully stack. The window is personal and may not exist for every household.
8. The Conversion Ripple Map
A conversion can affect more than the federal tax bracket:
Not every conversion triggers all of these effects. Use conditional analysis.
9. The Five-Year Rules
Qualified Roth IRA Earnings
A five-tax-year period generally begins with the first contribution to any Roth IRA. A qualifying event (such as reaching age 59 1/2) must also occur before earnings are qualified.
Each Conversion
For someone under age 59 1/2, each conversion has a separate five-tax-year period that may affect the 10% additional tax if converted taxable amounts are withdrawn early. Exceptions may apply.
Pay the tax from outside assets when practical.
Withholding taxes from the converted amount leaves less money in Roth and may create an early-distribution issue for a person under 59 1/2. Coordinate with your tax professional and cash-flow plan.
10. Pay Tax Now, or Let Your Children Pay It Later?
A traditional account generally passes both the assets and an embedded future income-tax obligation to the beneficiary. A qualified Roth account may offer tax-free distributions, but inherited-account deadlines can still apply.
| Feature | Traditional | Roth |
|---|---|---|
| Qualified withdrawals | Taxable as ordinary income | Generally tax-free |
| Owner lifetime RMDs | Required (generally at 73) | None |
| 10-year deadline for most non-spouse heirs | Yes | Yes |
| Annual distributions years 1-9 | May be required | Generally not required |
| Planning flexibility for heirs | Limited by tax impact | Greater (tax-free distributions) |
The widow's tax penalty:A surviving spouse may later file as single while retaining substantial household income, potentially compressing that income into higher brackets.
Beneficiary Design Still Matters
Spouses, eligible designated beneficiaries, trusts, estates, and charities can face different rules. Beneficiary forms should be coordinated with the estate plan. Naming a trust does not automatically improve the result.
Not every conversion improves an inheritance.Compare the owner's tax rate today with the likely beneficiary's tax rate, time horizon, charitable intent, state taxation, and the family's need for liquidity.
11. Annual Roth Planning Checklist
- Am I eligible for a direct Roth IRA contribution?
- Does my workplace plan offer designated Roth contributions?
- Do I have traditional, SEP, or SIMPLE IRA balances?
- Would the pro-rata rule make a backdoor conversion partly taxable?
- Does my plan accept voluntary after-tax contributions?
- Does it allow automatic or frequent in-plan Roth conversions?
- Are in-service Roth IRA rollovers permitted?
- How much of the $72,000 annual-additions limit remains after employee and employer contributions?
- Would a conversion this year push me into a higher Medicare premium bracket?
- Is this a lower-income conversion year?
- Can conversion taxes be paid from outside assets?
- How would the strategy affect my spouse and beneficiaries?
Document a one-page annual Roth plan covering:
- Available Roth routes
- Contribution and conversion amounts
- Expected taxable income
- Key thresholds
- Tax-payment source
- Execution deadlines
- Responsible professionals
12. Frequently Asked Questions
Can someone earning $500,000 contribute to a Roth account?
Yes. While a direct Roth IRA contribution is phased out above $252,000 for married filers in 2026, the Roth 401(k), backdoor Roth IRA, and mega-backdoor Roth have no income cap.
Do I need a side business to use a backdoor Roth?
No. A backdoor Roth IRA uses a nondeductible traditional IRA contribution followed by a conversion. No business income is required.
What is the difference between a backdoor Roth and a mega-backdoor Roth?
A backdoor Roth converts a nondeductible IRA contribution (up to $7,500 in 2026). A mega-backdoor Roth uses voluntary after-tax 401(k) contributions (potentially $32,500 or more) converted to Roth inside the plan or rolled to a Roth IRA.
Can my spouse make a separate backdoor Roth contribution?
Yes, if the spouse has sufficient compensation or files jointly. Each spouse has a separate IRA and a separate pro-rata calculation.
What is the IRA pro-rata rule?
The pro-rata rule aggregates all traditional, SEP, and SIMPLE IRA balances when calculating the taxable portion of a conversion. You cannot convert only the after-tax portion if pre-tax money exists in any of those accounts.
Is a Roth conversion always a good idea?
No. A conversion is generally favorable when the tax rate paid today is lower than the rate expected in retirement. The decision depends on current income, future income projections, state taxes, Medicare premiums, and the household's liquidity.
Do inherited Roth accounts have a 10-year deadline?
For most non-spouse beneficiaries, yes. The account must generally be emptied by the end of the tenth year following the owner's death. However, qualified Roth distributions within that period are generally tax-free.
Download the Acanto Roth Strategy Guide
A 12-page guide to the seven Roth routes, backdoor and mega-backdoor mechanics, conversion windows, inherited accounts, and the questions to bring to your CPA or financial-planning meeting.
Peter Lusk, Jr., MBA, CMT
Founder & CIO, Acanto
This material is for educational purposes only and is not individualized investment, tax, or legal advice. Tax laws, contribution limits, retirement-plan provisions, and individual circumstances can change. Roth eligibility, conversion taxation, required distributions, and inherited-account rules depend on the taxpayer's facts. Consult qualified tax, legal, and financial professionals before implementing a strategy.
Acanto LLC does not prepare tax returns or provide legal advice. Any tax calculations shown are illustrative and should be confirmed by the client's tax professional.