Backdoor Roth IRA in 2026
If your income exceeds the Roth IRA phaseout, the backdoor Roth IRA gives you Roth tax treatment on $7,500 of contributions per year. Here is the legal mechanism, the pro rata trap, and the mega backdoor for plans that allow it.
You earn above the 2026 phaseout
- Single filer with modified AGI above $168,000
- Married filing jointly with modified AGI above $252,000
- Married filing separately with modified AGI above $10,000
At those incomes you cannot contribute directly to a Roth IRA. The backdoor route uses a Traditional IRA contribution followed by an immediate conversion.
$7,500 of Roth IRA space per year
At a 7 percent return for 25 years, $7,500 per year compounds to roughly $475,000. That balance grows tax free and is never subject to RMDs in your lifetime. Couples both contribute, doubling the figure.
The two step process, in order
Both steps happen at the same custodian. Most major brokerages have a backdoor Roth workflow built in.
- 1
Contribute to a Traditional IRA, non deductible
Contribute up to $7,500 (or $8,600 at 50 plus) to a Traditional IRA. Do not take the deduction. File IRS Form 8606 to track non deductible basis.
- 2
Convert the Traditional IRA to a Roth IRA
Initiate a Roth conversion at your custodian. If you contributed $7,500 and convert $7,500 the same week, the taxable portion is roughly zero (any growth between contribution and conversion is taxable).
- 3
Confirm pro rata is clean
Pro rata treats all your IRAs as one pool. If you have any pre tax IRA balance (Traditional, SEP, SIMPLE), the conversion will be partially taxable. Roll those balances into a 401k first.
- 4
Repeat next January
Most people repeat the process every January 1. Do it early in the year to maximise the Roth bucket window for tax free growth.
The pro rata rule, with numbers
The pro rata rule looks at all of your Traditional, SEP, and SIMPLE IRA balances together when calculating tax on a conversion.
- Total IRA basis: $97,500 ($90,000 pre tax plus $7,500 after tax)
- Pre tax fraction: 90,000 divided by 97,500 = 92.3 percent
- If you convert $7,500: 92.3 percent ($6,923) is taxable as ordinary income
- Only 7.7 percent ($577) of the conversion is tax free
The fix: roll the $90,000 of pre tax IRA balances into a 401k or solo 401k before converting. Once the IRA pool is empty of pre tax dollars, the pro rata fraction is zero and the conversion is fully tax free.
Mega backdoor Roth via 401k after tax contributions
Some 401k plans permit after tax contributions on top of the employee deferral. Combined with in plan Roth conversions or in service distributions, this opens up tens of thousands of additional Roth space per year.
- Plan permits voluntary after tax contributions
- Plan offers in plan Roth conversions or in service distributions
- Custodian processes after tax sweeps to a Roth bucket promptly
- Confirm with HR or the plan summary description before relying on it
Contribution order for high earners
- 1. 401k up to the full employer match
- 2. Backdoor Roth IRA, $7,500 ($8,600 at 50 plus)
- 3. Max 401k toward the $24,500 employee cap
- 4. Mega backdoor Roth if the plan allows it
- 5. HSA if eligible, $4,300 individual or $8,550 family
- 6. Taxable brokerage with tax efficient funds
Backdoor Roth questions
Is the backdoor Roth IRA still legal in 2026?+
Yes. The backdoor Roth IRA remains legal in 2026. Build Back Better Act provisions to eliminate it did not pass into law, and no current legislation pending in the 2026 session changes that. Always confirm with current IRS guidance and a tax professional before relying on the strategy.
What is the pro rata rule?+
The pro rata rule treats all of your Traditional, SEP, and SIMPLE IRA balances as a single pool when determining how much of a conversion is taxable. If 90 percent of your IRA balance is pre tax, then 90 percent of any conversion is taxable, even if you contributed the converted dollars after tax. Roll pre tax IRA balances into a 401k before converting to avoid this.
How much can I put through the mega backdoor Roth in 2026?+
The mega backdoor Roth uses after tax contributions inside a 401k. The combined employee plus employer cap is $72,000 in 2026. Subtract your employee deferral ($24,500) and employer match to get the headroom for after tax contributions. Typical headroom is $20,000 to $40,000, depending on the match.
Should I do a backdoor Roth before or after maxing my 401k?+
After capturing the employer match and before fully maxing the 401k. Order: 1) 401k to match, 2) backdoor Roth IRA $7,500, 3) max 401k toward $24,500 employee cap, 4) mega backdoor Roth if the plan allows, 5) HSA, 6) taxable brokerage. The Roth IRA bucket is more flexible than the 401k, so it is worth filling early.