Backdoor Roth IRA
Category: Retirement & health · Related form: Form 8606
A planning sequence of nondeductible traditional IRA contributions followed by conversion to Roth, used when MAGI blocks direct Roth contributions. The pro-rata rule can tax part of the conversion.
How Backdoor Roth IRA fits 2026 planning
Backdoor Roth IRA sits inside retirement contribution limits, distribution timing, and how pre-tax vs Roth choices change AGI. For tax year 2026, US Tax Tools treats year-scoped constants (brackets, contribution limits, wage bases, credit schedules) as separate datasets — so explanations of Backdoor Roth IRA should be read with the same year selected in any linked calculator.
Category focus: Retirement & health. Readers usually land on this page while comparing a paycheck estimate, a credit phaseout, or a retirement contribution room figure that depends on understanding Backdoor Roth IRA first.
Worked example
Contributing $7,500 nondeductible and converting soon after can move money into a Roth if you have little other pre-tax IRA balance.
Treat the example as a teaching sketch, not a filing position. Change filing status, state residency, or mid-year events and the same definition of Backdoor Roth IRA can produce a different cash outcome even when the glossary text stays the same.
What to watch for
Definitions of Backdoor Roth IRA can differ slightly across IRS publications, SSA rules, Marketplace subsidy worksheets, and state agencies. When two programs both say “income,” confirm which modification rules apply — MAGI for one credit is not always MAGI for another.
Legislation and inflation adjustments can move the dollar thresholds around Backdoor Roth IRA without renaming the concept. Prefer the effective date on the primary source (Rev. Proc., SSA notice, USDA table, or state DOR bulletin) over any blog summary — including this one if a later notice supersedes it.
On a filed return, Backdoor Roth IRA most often surfaces around Form 8606. Read the official IRS instructions for that form for the tax year you are filing — glossary pages summarize concepts; they do not replace line-by-line worksheets.
Next step
When you are ready to model numbers, open the Backdoor Roth IRA related calculator on US Tax Tools. Engines keep tax-year datasets separate so a 2025 habit does not silently reuse a 2026 constant.
Related reading: Tax insights for longer 2026 explainers, Methodology for how engines store cents and traces, and Disclaimer for educational-use limits.