Critical for tracking after-tax IRA contributions and preventing double taxation on distributions.

When Is Form 8606 Required?

  • Nondeductible contributions to traditional IRAs
  • Roth conversions (traditional to Roth IRA)
  • Distributions from IRAs with basis
  • Roth IRA distributions (before age 59½)

Required even if you don't otherwise need to file a tax return.

Key Components of Form 8606

Part Purpose
Part I Nondeductible contributions and basis tracking
Part II Roth conversion calculations
Part III Roth IRA distributions and taxable amounts

Critical Compliance Rules

  • Basis tracking: Lifetime responsibility until all IRA funds are distributed
  • Pro-rata rule: Applies to conversions when you have both pre-tax and after-tax IRA funds
  • Deadlines: Must file for each year with nondeductible contributions
  • Penalties: $50 per omission, plus potential double taxation

Common Mistakes to Avoid

  • Forgetting to file after making nondeductible contributions
  • Incorrect pro-rata calculations during Roth conversions
  • Missing basis from prior year Forms 8606
  • Failing to report qualified Roth distributions

Errors can lead to paying tax twice on the same contribution.

Related Tax Documents

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