Backdoor Roth IRA Cheat Sheet (2026)

Carson McLean, CFP
Jan 14
4 min read

This guide expands on our article “Backdoor Roth IRAs and the Pro-Rata Rule: What Investors Need to Know” and is designed to serve as a standalone reference for investors.

One of the Most Common Questions:

“Can I still do a backdoor Roth if I have a rollover IRA?”

Short answer: Yes, but only if you navigate the pro-rata rule carefully. Below is a 2026-friendly guide with key limits, deadlines, and a simple step-by-step checklist.

What Is a Backdoor Roth IRA?

The backdoor Roth IRA is a legal strategy that allows high-income earners to contribute to a Roth IRA, even when their income exceeds the IRS limits for direct contributions.

Here’s how it works:

Make a non-deductible contribution (after-tax dollars) to a Traditional IRA.
Convert that money to a Roth IRA, usually right away.

It’s simple in theory, but there are traps. Chief among them: the pro-rata rule.

2026 Contribution & Income Limits

IRA Contribution Limit (Traditional + Roth, combined):

Under 50: $7,500
Age 50+: $8,600 (includes the catch-up contribution)

Roth IRA Direct Contribution Phase-Out (2026 Modified AGI):

Single / Head of Household: $153,000 to $168,000
Married Filing Jointly: $242,000 to $252,000
Married Filing Separately (and lived with spouse at any time): $0 to $10,000

If your income is above the phase-out range, you can’t contribute directly to a Roth IRA, which is why the backdoor strategy exists.

Important: These contribution limits apply per person. Married couples can each contribute to their own Traditional IRA, even if only one spouse has earned income (via a spousal IRA), as long as household income and other eligibility rules allow it.

Timing & Deadlines

Traditional IRA Contribution Deadline (for 2026):Generally April 15, 2027 (the tax filing deadline for 2026 returns, not including extensions).

Roth Conversion Timing: There’s no official IRS deadline for Roth conversions, but they’re taxed based on the calendar year the conversion happens, not the year of the contribution.

Example: If you make a 2026 contribution in early 2027 but convert it later that year, the conversion is taxed in 2027 (not 2026).

Best Practice: Whenever possible, contribute and convert in the same calendar year to simplify tax reporting and minimize the risk of unintended taxable growth.

The Pro-Rata Rule (And Why It Matters)

If you have any pre-tax Traditional IRA balances (including rollover IRAs, and typically SEP or SIMPLE IRAs that are treated as Traditional IRAs for tax purposes), the IRS looks at your IRAs in aggregate when you convert any amount to Roth.

A key point investors miss: the pro-rata calculation uses the total value of all your Traditional IRAs as of December 31 of the conversion year.

This means even if your new contribution is after-tax, a big chunk of your conversion could still be taxed.

Example:

You contribute $7,500 after-tax to a Traditional IRA.
You also have $100,000 in a pre-tax rollover IRA.
Total IRA balance = $107,500.

Only about 7.0% of your Roth conversion would be tax-free. The remaining 93.0% would be taxed as ordinary income.

Backdoor Roth IRA Checklist

Step 1: Confirm whether you’re over the Roth income limit.

If your 2026 modified AGI is $168,000 or more (single/HOH) or $252,000 or more (married filing jointly), you generally can’t contribute directly to a Roth IRA. If you’re within the phase-out range, your direct contribution limit is reduced, and many people still choose the backdoor route for simplicity.

Per-Spouse Rules: The backdoor Roth process is executed individually, not jointly.

Each spouse makes their own Traditional IRA contribution.
Each spouse evaluates their own IRA balances for the pro-rata rule.
Each spouse files Form 8606 to track contributions and conversions.

Step 2: Check for any pre-tax IRA balances.

Do you have Traditional IRA money (including rollover IRAs and other IRA types treated as Traditional IRAs for these rules) with pre-tax dollars? This is what triggers the pro-rata issue.

Step 3: Make a non-deductible Traditional IRA contribution.

Up to $7,500 (or $8,600 if age 50+). Use after-tax dollars.

Step 4: File IRS Form 8606.

This is required to report your non-deductible contribution and track your basis. Don’t skip it.

Step 5: Convert to Roth IRA.

Ideally convert right away, before any growth occurs. Remember: the conversion is taxed in the year it happens.

Step 6: Deal with existing pre-tax IRAs.

You generally have three options:

Reverse rollover into a 401(k) or 403(b), if your plan accepts it.
Convert the full IRA balance to Roth, but prepare for a tax hit.
Gradually convert over time, knowing the pro-rata rule will apply until the pre-tax IRA balance is gone.

Tip: If your goal is a “clean” backdoor Roth (mostly tax-free conversion of the non-deductible amount), the reverse rollover approach often works best, but timing matters. In many cases, you want the pre-tax IRA balance out of the IRA world by December 31 of the conversion year.

Tip: You Can Still Contribute Without Converting

Even if you can’t convert yet because of an existing IRA balance, you can still make the non-deductible Traditional IRA contribution now. You’ll preserve the contribution space and can convert later when the timing makes more sense.

Carson McLean, CFP® Founder of Altruist Wealth Management, a flat-fee, fiduciary financial planning firm helping clients nationwide navigate retirement, tax, and investment strategies with clarity and confidence.

Disclosure: This content is for informational and educational purposes only and should not be construed as personalized tax, legal, or financial advice. You should consult a qualified professional regarding your unique situation before taking any action.