Records · 2025 and 2026

Reconcile Forms 1099-R, 5498 and 8606 Before Filing

Published by Moss Ladder · Updated November 2, 2026 · Editorial policy

Executive summary

Forms 1099-R, 5498 and 8606 describe different parts of an IRA transaction. Their amounts can differ without any document being wrong. The practical task is to connect a distribution, the receiving contribution or conversion record, year-end values and the owner's basis history. This guide creates a document crosswalk and works through a contribution that earns $60 before conversion, so the final return does not depend on copying one custodian field without context.

Educational guidance for ordinary scenarios. Check the official form's year and filing branches and obtain advice for your actual records.

Try the related planning tool

Assign each document a specific job

Form 1099-R reports a retirement distribution and related reporting information. Form 5498 reports IRA contribution information, including relevant conversion and valuation information for the account involved. Form 8606 is part of the taxpayer's reporting of nondeductible basis and applicable IRA transactions. A custodian generally cannot determine the owner's full basis history across every IRA and prior return. The taxpayer's return workpaper must connect the documents rather than assuming one institution has already completed the entire pro-rata analysis.

Prepare a source index listing the owner, account type, institution, tax year and document status. Distinguish original from corrected forms, and identify which account issued or received each amount. If the taxpayer has several custodians, assemble the complete set before drawing a conclusion from one form. Keep a place for transaction confirmations and annual statements, because a tax form alone may not explain the actual completion date, a transfer reference or why two related amounts are different.

A document crosswalk for an ordinary conversion

This table describes the questions each record can help answer. It is not an instruction to copy every reported amount into the same line on the return. Use the instructions for the document's actual year and check the account classification. Withholding, inherited accounts, recharacterizations, special repayments and returned contributions can change the required treatment and should be investigated separately from this ordinary example.

What the principal IRA records establish
Record	Useful evidence	What still needs reconciliation
Form 1099-R	Reported distribution amount, codes and withholding information	Taxpayer's aggregate basis and applicable return treatment
Form 5498	Reported IRA contributions, conversion receipts and account valuation information	Whether a regular contribution was deductible on the return
Form 8606 and prior workpapers	Reported basis, recovery and carryforward	Completeness of the source documents and correct filing branches
Transaction confirmation and annual statement	Completion details, transfers and year-end values	How the event is classified under the tax rules

Explain the $7,000 contribution and $7,060 conversion separately

Assume one owner makes an eligible nondeductible $7,000 contribution for 2025. It earns $60 before the entire $7,060 balance is converted in 2025. No relevant IRA assets remain at December 31, and there are no other distributions, late contributions, outstanding rollovers or special adjustments. The contribution evidence supports $7,000 of new basis. The conversion evidence supports a $7,060 conversion. The extra $60 is investment earnings, not a second regular IRA contribution.

The ordinary allocation recovers the $7,000 basis and leaves $60 taxable conversion income. Those amounts should reconcile with the source forms without forcing all documents to show $7,000 or all documents to show $7,060. If the reporting software treats the entire conversion as taxable, investigate whether the nondeductible contribution or prior basis was omitted. If it treats the entire conversion as tax free, investigate whether the earnings were incorrectly counted as contribution basis.

Reconciliation of $7,000 basis and a $7,060 conversion

This invented example assumes one taxpayer, documented basis, eligible ordinary transactions, no special repayment and no tax withholding. Dollar amounts are planning values. Use the official form's filing branches; a displayed line is not automatically a required entry on a filed return. The 2026 examples apply published 2026 contribution limits with the 2025 allocation structure.

Reconciliation of $7,000 basis and a $7,060 conversion
Form 8606 line	Modeled amount
1	$7,000.00
2	$0.00
3	$7,000.00
4	$0.00
5	$7,000.00
6	$0.00
7	$0.00
8	$7,060.00
9	$7,060.00
10	0.991501
11	$7,000.00
12	$0.00
13	$7,000.00
14	$0.00
16	$7,060.00
17	$7,000.00
18	$60.00
15a	$0.00
15b	$0.00
15c	$0.00

Do not treat a custodian taxability entry as the complete answer

Read the distribution form's taxable-amount information and any indication that taxability was not determined together with the applicable instructions. An institution's reporting does not establish that the taxpayer has no basis, nor does uncertainty on the form establish that the distribution is tax free. The correct return treatment depends on the owner's complete facts. A conversion from an account opened recently can still be affected by older traditional, SEP or SIMPLE IRA assets elsewhere.

In the invented earnings example, the full annual inventory supports a clean conversion with only $60 taxable. If another applicable IRA held pretax assets at year end, the result could be substantially different even if the conversion confirmation were unchanged. Add a short explanation to the workpaper showing how the gross distribution, conversion amount, basis allocation and final taxable amount connect. This is a stronger control than asking software to accept an unexplained override of a custodian number.

Reconcile contribution years and reporting years

A contribution made early in a calendar year may be designated for the preceding tax year, while a conversion completed that calendar year is reported for the conversion year. Form 5498 information and contribution confirmations must therefore be read with their designated contribution year, not just the date the document arrived. Keep the actual deposit date in the workpaper as well, because the ordinary allocation has a specific adjustment for certain contributions made after December 31.

A conversion receipt and a traditional IRA contribution record can also be issued for different accounts, even at the same institution. Match them by owner, year and event rather than assuming the names of the forms identify a single account. Do not move a conversion into the preceding year merely because the contribution funded it. When a transaction spans year end or is corrected later, preserve the custodian's confirmation and ask which year and event the revised form actually reports.

Handle missing and corrected forms without duplicating transactions

A Form 5498 may arrive after the ordinary income-tax filing deadline. Its later arrival does not by itself mean a transaction did not occur or that a return should use an invented amount. Retain the completed transaction confirmations and ask the preparer what evidence is sufficient for timely filing or whether an extension is appropriate. A missing form and an uncertain transaction are different problems. The first may be a document-delivery issue; the second requires resolving the actual facts.

When a corrected form arrives, replace the relevant source amount in the reconciliation rather than adding the new form as another distribution or contribution. Record the date received, the fields changed and whether a filed return or later basis carryforward is affected. A corrected custodian form does not automatically correct the taxpayer's return. Likewise, correcting a return does not change a custodian's reporting record. Keep both processes visible until the discrepancy has a documented resolution.

Complete a return-ready reconciliation checklist

For each owner and year, reconcile gross distributions, completed conversions, other covered distributions, applicable ending IRA values, supported opening basis and current nondeductible contributions. Confirm that transfers were not duplicated and corrected forms were not counted twice. Identify withholding and special events separately. Then compare the resulting Form 8606 allocation with the taxable IRA amount carried to the income-tax return under the appropriate instructions. Do not assume the sum of all form boxes belongs in one calculator input.

Save the source index, the explanation of any mismatched amounts and the final workpaper together. If the numbers still do not reconcile, describe the specific difference for the custodian or preparer using the actual records through an appropriate private channel. The website can illustrate a fabricated $60 earnings case and organize a checklist, but it does not receive your forms or file a return. A finished reconciliation should let another reviewer explain each important number without access to your memory of the transaction.

About the publisher: Moss Ladder

Moss Ladder owns and publishes RothProRata.com, an independent educational website about IRA basis, Roth conversions and Form 8606. The guides connect official sources with invented examples, document checklists and browser-local planning tools.

AI-assisted tools help prepare explanations and software. Numerical allocation examples state their assumptions and are checked with automated calculations. These engineering checks do not constitute independent CPA or Enrolled Agent review, and no professional tax credential is claimed.

About Moss Ladder Editorial policy Report a correction

Official sources

Source year and transaction type matter. Citations support the explanation; they do not imply government endorsement.