Handling Form 1099-R for inherited IRAs without a Form 5498

Inherited IRAs continue to create confusion, especially when a nonspouse beneficiary receives a Form 1099-R, Distributions From Pensions, Annuities, Retirement or Profit-Sharing Plans, IRAs, Insurance Contracts, etc., but no Form 5498, IRA Contribution Information. Under the SECURE Act rules and later IRS guidance, the rules did not necessarily get simpler. For tax professionals, the key is knowing how to read what is available and fill in what is missing. Start with the basics. 

When a beneficiary is not a surviving spouse, they generally cannot treat the IRA as their own. Instead, they must follow inherited IRA distribution rules, often under the 10-year rule. Required minimum distributions (RMDs) may still apply depending on whether the original owner had started distributions. Now layer in the reporting issue. Form 1099-R reports the distribution. Form 5498 reports the fair market value (FMV) of the IRA and helps confirm year-end balances. But Form 5498 is often delayed or never received by the beneficiary, particularly when accounts are transferred between custodians or when inherited accounts are newly established. So, what should you do when Form 5498 is missing?

Focus on the Form 1099-R first 

The distribution code tells a story, but it is not always the full story.

• Code 4 generally indicates a distribution made to a decedent’s beneficiary.
• Code T indicates a Roth IRA distribution for which an exception applies, but the payer does not know whether the five-year holding period has been met.

If Code 7 appears on a distribution the client says came from an inherited account, do not let the code alone determine the tax treatment. Confirm the account type and inherited status and consider whether the custodian should clarify or correct Form 1099-R. Often, tax professionals see Code 7 and automatically tax the distributions even if these are not from a traditional IRA. 

Instead, confirm:

• Was the account inherited?   
• Who was the original owner? 
• What is the original owner’s date of birth?
• When did the original owner pass away? 

If the client confirms the account is inherited, apply the appropriate beneficiary rules and resolve any apparent inconsistency with Form 1099-R.

Reconstruct FMV without Form 5498

FMV matters because it helps determine RMD calculations and track account activity. Without Form 5498, you are not stuck. You can:

• Request year-end statements from the custodian (broker)
• Use account summaries or online account history (if available)
• Have the client contact the financial institution directly

Document your efforts. Tax professionals should maintain a reasonable record showing how FMV was determined. This is especially important if the IRS questions RMD compliance.

When reviewing an inherited Roth IRA, do not assume that the original owner’s exemption from lifetime RMDs eliminates the beneficiary’s distribution requirements. The beneficiary may still be subject to the 10-year rule or other post-death distribution rules. You should also confirm the account’s FMV and available contribution history, particularly when the original owner’s five-year period is unclear. Don’t rely only on what the Form 1099-R, Box 7 says. 

Traditional vs. Roth inherited IRAs

The tax treatment differs significantly. For inherited traditional IRAs:

• Distributions are generally taxable 
• RMD rules apply depending on the decedent’s status 
• The 10-year rule often applies for noneligible designated beneficiaries 

For inherited Roth IRAs:

• Distributions are generally tax-free if the five-year rule is met
• The original owner’s five-year period carries over to the beneficiary 
• The 10-year rule generally applies to noneligible designated beneficiaries, while eligible designated beneficiaries may have different distribution options

Do not confuse a Roth IRA owned by a taxpayer with an inherited Roth IRA. The beneficiary does not get to restart the clock or treat it as their own. Often tax professionals will ask the client for Form 5498 in January, but keep in mind that Form 5498 is not released at the beginning of the year, but instead closer to May. Since Form 5498 provides information only, often firms will provide the taxpayer with a copy of Form 5498 much later in the year (showing contributions, rollovers, conversions, repayments, RMD information and FMV). 

Determining Roth IRA basis

This is where missing Form 5498 becomes more challenging. Basis in a Roth IRA reflects contributions made by the original owner. Without records, you need to reconstruct the history.

Start by asking for:

• Prior-year tax returns of the decedent 
• Contribution records 
• Brokerage statements 

If documentation is incomplete, reconstruct the contribution history using the best available records and document any amounts that remain unresolved. Do not treat an unsupported estimate as established basis. In most inherited Roth IRA situations, if the five-year rule is satisfied, distributions are completely nontaxable regardless of basis. Still, documentation helps support that conclusion. Form 5498 can also help document a backdoor Roth transaction because the traditional IRA contribution and Roth conversion are reported on Forms 5498 issued for the applicable accounts. When clients move accounts between financial institutions, remind them to retain their Forms 5498 to support future reporting.

Practical approach for tax professionals

When handling these cases:

• Do not rely solely on Form 1099-R codes  
• Confirm the inherited status early in the interview if applicable 
• Reconstruct FMV using available records, such as year-end statements, account history and prior Forms 5498
• Apply the correct distribution rules based on the beneficiary type when preparing the return
• Document assumptions and supporting information 

Clear documentation protects both the preparer and the taxpayer. Inherited IRA reporting requires more than data entry. It requires judgment, especially when forms are missing or incomplete. A careful, methodical approach promotes accurate reporting and reduces error risk when information returns are missing or inconsistent. Consistent documentation and proper application of the beneficiary rules also support a defensible filing position.