The Backdoor Roth IRA, Step by Step

A backdoor Roth IRA is a common planning strategy for high-income clients who cannot contribute directly to a Roth IRA but still want access to Roth tax treatment. The concept is simple: make a nondeductible contribution to a traditional IRA, then convert those dollars to a Roth IRA. The execution is where advisors earn their keep.

Done cleanly, the backdoor Roth IRA can help clients add after-tax dollars to a Roth account, pursue tax-free growth, avoid lifetime RMDs on the Roth IRA, and create more flexible retirement and legacy planning options. Done carelessly, it can create unexpected taxes, reporting errors, or confusion around the pro rata rule.

This article is educational and not tax or legal advice. Advisors should coordinate with the client’s CPA before implementing the strategy.

What is a backdoor Roth IRA?

A backdoor Roth IRA is not a separate account type. It is a two-step process that uses existing IRA rules. First, a client makes a nondeductible, after-tax contribution to a traditional IRA. Second, the client converts that amount to a Roth IRA.

The strategy matters because direct Roth IRA contributions are limited by modified adjusted gross income. High earners may be phased out or completely ineligible to contribute directly. In 2026, direct Roth IRA contributions are unavailable above commonly cited thresholds of $168,000 for single filers and $252,000 for married couples filing jointly, with phaseout ranges below those levels. Contribution limits are also indexed over time, so advisors should confirm the current year’s numbers before client implementation.

There is no income limit on Roth conversions. That is the opening the backdoor strategy uses.

Why clients consider the strategy

Clients usually consider a backdoor Roth IRA for four reasons. First, Roth assets can grow tax-free if the distribution rules are satisfied. Second, qualified Roth IRA withdrawals are generally tax-free. Third, Roth IRAs do not require minimum distributions during the original owner’s lifetime. Fourth, Roth assets may be useful for estate planning because beneficiaries can often receive tax-free distributions if requirements are met, though inherited account rules still apply.

For high-income clients who already max out workplace retirement plans, health savings accounts, and other savings vehicles, the backdoor Roth can be a modest but valuable annual planning step. The annual contribution limit may not transform a balance sheet overnight, but repeated contributions over many years can create meaningful tax diversification.

Step 1: Confirm the client is actually ineligible for a direct Roth contribution

Before using the backdoor, confirm that the client cannot simply walk through the front door. Review modified adjusted gross income, filing status, compensation eligibility, and the current year’s contribution limits. Some clients are surprised to learn they remain eligible for a partial direct Roth contribution, while others are clearly above the threshold.

This step also helps avoid overfunding. If the client already made IRA contributions elsewhere for the year, the advisor needs to confirm how much room remains. IRA contribution limits apply across traditional and Roth IRAs combined, not separately to each account.

Step 2: Inventory every traditional, SEP, and SIMPLE IRA

The most important backdoor Roth IRA tax issue is the pro rata rule. The IRS generally looks at all of a client’s traditional IRAs, SEP IRAs, and SIMPLE IRAs as one combined pool when determining the taxable portion of a conversion. The client cannot simply choose to convert only the after-tax dollars while leaving pre-tax IRA dollars untouched.

For example, assume a client contributes $7,500 of nondeductible after-tax money to a traditional IRA but also has $92,500 of pre-tax IRA assets. The client’s combined IRA pool is $100,000, and only 7.5% is after-tax basis. If the client converts $7,500, most of that conversion may be taxable because the conversion is treated proportionally.

This is the detail most likely to create surprise. The strategy is often cleanest for clients with little or no pre-tax money in traditional, SEP, or SIMPLE IRAs. Employer plan assets, such as many 401(k) accounts, are generally not included in the IRA pro rata calculation, but rollovers into an IRA during the same year can change the result.

Step 3: Decide whether to clear pre-tax IRA balances

If the client has pre-tax IRA assets, the advisor may need to evaluate alternatives before proceeding. One option may be rolling eligible pre-tax IRA assets into an employer plan, if the plan accepts roll-ins and the investment, fee, and administrative tradeoffs are acceptable. Another option is accepting that some or most of the conversion will be taxable. A third option is skipping the strategy.

This decision should be modeled, not guessed. The client’s tax bracket, future income, liquidity, estate goals, retirement timeline, and existing Roth assets all matter. A backdoor Roth IRA is not automatically attractive just because a client is a high earner.

Step 4: Make a nondeductible traditional IRA contribution

Once the advisor confirms the strategy fits, the client makes a nondeductible contribution to a traditional IRA. “Nondeductible” is key. The client is not taking a tax deduction for the contribution. Instead, the contribution creates after-tax basis that should not be taxed again when converted or later distributed.

Operationally, many advisors prefer using a separate traditional IRA with no prior balance for clarity. However, the pro rata rule still considers the client’s aggregate IRA balances, so a separate account does not avoid taxation if other pre-tax IRA assets exist.

Step 5: Convert to a Roth IRA

After the nondeductible contribution, the client converts the funds to a Roth IRA. Many firms convert promptly to minimize taxable earnings between contribution and conversion. If the contribution earns interest or investment gains before conversion, those earnings are generally taxable when converted.

Some articles discuss step-transaction concerns: the idea that the IRS could view a rapid contribution and conversion as one integrated transaction. The strategy is widely used, but advisors should still rely on current tax guidance and CPA input. The client’s process should be documented and executed consistently.

The conversion must be completed by December 31 to count for that tax year’s conversion reporting. IRA contribution deadlines can extend to the tax filing deadline, but conversion timing follows the calendar year.

Step 6: File IRS Form 8606

Form 8606 is the paperwork that keeps the strategy from becoming a future tax problem. The form reports nondeductible IRA contributions and tracks after-tax basis. It also reports Roth conversions.

If the client fails to file Form 8606, the tax record may not properly reflect basis. That can lead to double taxation or confusion later. Advisors should remind clients that the custodian’s tax forms are not a substitute for proper tax reporting. The client’s CPA should receive clear documentation of the contribution, conversion, date, amount, and any earnings.

Step 7: Understand the five-year rules

Roth IRAs have five-year rules that can affect withdrawals. One rule applies to tax-free treatment of earnings. Another five-year period can apply separately to each conversion for purposes of early withdrawal penalties. Clients who plan to leave the money invested for retirement may not care about immediate access, but advisors should still explain the rules.

This is especially important for clients under age 59½ or clients who may need liquidity. A backdoor Roth contribution should not be funded with dollars the client might need soon.

Common client profiles where it can fit

A backdoor Roth IRA may fit a high-income professional with no pre-tax IRA balances, strong cash flow, an adequate emergency fund, and a desire for tax diversification. It may also fit a married couple where both spouses can make nondeductible IRA contributions and conversions, assuming each spouse’s IRA balance picture is clean.

It may be less attractive for clients with large pre-tax IRA balances, clients expecting a materially lower future tax rate, clients lacking liquidity to pay conversion taxes, or clients who cannot track the paperwork reliably.

Advisor workflow checklist

A clean backdoor Roth IRA workflow should include:

Confirm direct Roth eligibility and annual contribution room.
Inventory traditional, SEP, and SIMPLE IRA balances for the client.
Check for planned rollovers into IRAs during the same tax year.
Coordinate with the CPA before implementation.
Document whether the pro rata rule applies.
Make the nondeductible contribution.
Convert to Roth IRA.
Track contribution and conversion dates.
Send documentation to the tax preparer for Form 8606.
Review the client’s Roth balance and beneficiary designations.

The workflow is repeatable, but it should not be mindless. Each year can bring new income levels, contribution limits, account rollovers, and tax law changes.

How Verlo helps advisor teams operationalize planning

The backdoor Roth IRA strategy is a perfect example of why advisory operations matter. The tax concept is well known, but the implementation depends on data scattered across account statements, planning notes, CPA emails, custodian forms, and CRM tasks.

Verlo helps advisor teams reduce the manual work around that process. It can read documents, preserve client context, generate meeting follow-ups, help update CRM records, and support auditable analysis workflows. Advisors still make the recommendation; Verlo helps keep the operational evidence and next steps organized.

Bottom line

A backdoor Roth IRA can be useful for high-income clients who want Roth exposure but exceed direct contribution limits. The key is disciplined execution: confirm eligibility, understand the pro rata rule, make a nondeductible contribution, convert carefully, file Form 8606, and document the reasoning.

For advisory firms, the strategy is less about a clever loophole and more about a repeatable client service process. See how Verlo helps advisor teams reduce manual admin work: https://verlo.finance/lp-demo