Covered vs. Uncovered Securities: Understanding Cost-Basis Reporting

Key Takeaways

The covered/uncovered distinction is one of the most practically consequential items buried in a year-end 1099-B, and most retail investors encounter it for the first time when it's already causing a problem — a surprise CP2000 notice, a $0 basis in a transferred account, or a legacy position with no surviving paper trail. The good news is the rule is mechanical: whether a security is covered depends on what type of security it is and when you acquired it, nothing more. Knowing where the phase-in dates fall, how Form 8949 maps to them, and what ACATS transfers actually do and don't preserve is enough to keep the problem from catching you.

Direct answer: Your broker is required to report cost basis to the IRS only for covered securities — those acquired on or after the phase-in date for their security type. Equities are covered if acquired on or after January 1, 2011; mutual funds, ETFs, and DRIPs on or after January 1, 2012; certain complex instruments on or after January 1, 2014. For uncovered securities (acquired before those dates), your broker sends the IRS only the proceeds, not the basis — and if you don't supply your own basis on Form 8949, the IRS will treat the full proceeds as taxable gain.

• Covered securities require brokers to report both proceeds and cost basis to the IRS on Form 1099-B; uncovered requires proceeds only.
• Coverage is determined by acquisition date, not sale date — a stock bought in 2008 and sold today is still uncovered regardless of how long you held it.
• Form 8949 Box A/D = covered (basis reported to IRS); Box B/E = uncovered (proceeds reported, basis not); Box C/F = transactions not on a 1099-B at all.
• ACATS transfers preserve covered status in principle but frequently lose the basis data in practice — always verify after a transfer.
• Inherited shares are always treated as long-term and covered, but brokers still need FMV documentation to report basis correctly.
• Legacy positions from the 1990s and early 2000s are the most common source of uncovered-status surprises when investors finally sell.

What Are Covered and Uncovered Securities?

The terms come from IRC §6045 and the regulations implementing it, which were substantially amended by the Emergency Economic Stabilization Act of 2008 to require brokers to report not just the proceeds of sales but the cost basis of the securities sold. Before the 2008 amendments, a Form 1099-B showed only what your broker received when you sold — the gross proceeds. What you originally paid was your problem to remember and document. The IRS had no way to cross-check basis on returns, which created a gap that the 2008 legislation closed by requiring brokers to track and report basis directly to the IRS for newly acquired securities.

The amendment didn't apply retroactively to everything in everyone's account. Instead, Congress phased it in by security type, with mandatory compliance beginning in 2011 for the most common category — equities — and extending to more complex instruments through 2014. Securities acquired before the applicable phase-in date for their type are "uncovered": the broker is not required to report basis on them, even if the broker actually knows the original purchase price from historical records.

What "covered" means operationally

When you sell a covered security, your Form 1099-B will show both the gross proceeds and your adjusted cost basis, and it will indicate that the basis was reported to the IRS. That reporting is the key: the IRS receives its own copy of that 1099-B from your broker and can compare the basis and proceeds figures directly against what you report on Form 8949. If the numbers don't reconcile, the IRS notices.

For a covered security, your broker tracks the acquisition date, per-share cost for each tax lot, any adjustments for corporate actions (splits, spinoffs, mergers), and wash-sale adjustments when triggered. The cost-basis accounting method you've elected (FIFO, specific identification, average cost for eligible securities) is applied at the time of sale to determine which lots are being sold and at what cost.

What "uncovered" means operationally

When you sell an uncovered security, your Form 1099-B will show gross proceeds but will indicate that basis was not reported to the IRS. The broker may still show you a basis figure in your account portal if it has the historical data, but that figure does not go to the IRS. The IRS sees only the proceeds. If you file a return that shows no entry for the sale, the IRS's automated matching system will see a 1099-B with proceeds and no corresponding gain or loss on your return — and it will generate a notice proposing tax on the full amount. You have to put the correct basis on your own Form 8949 to reduce the taxable gain, and if your records are incomplete, the burden of reconstructing that history is entirely on you.

Phase-In Dates by Security Type

Three phase-in dates apply, organized by security type. The key principle: a security is covered only if it was acquired on or after the applicable date for its type. Acquisition date is what matters — not the date of sale, not the date of transfer to a new account, and not the date you opened a position in a different lot of the same ticker.

A few important clarifications that trip people up:

• Lot-by-lot, not account-by-account. If you hold 500 shares of a stock — 200 bought in 2009 (uncovered) and 300 bought in 2013 (covered) — the two lots have different covered status. When you sell, the specific lots being sold determine which 1099-B box applies. If you use specific identification and elect to sell the 2009 lot, those shares appear as uncovered on your 1099-B regardless of the fact that you also have covered shares in the same account.
• DRIP reinvestments create a new lot every time. If you enrolled in a dividend reinvestment plan before January 1, 2012, reinvestment lots acquired before that date are uncovered; lots acquired on or after January 1, 2012 are covered — even if the underlying shares in the same account predate that cutoff.
• The phase-in date applies to the original acquisition, not a replacement position. If you sold a stock in 2010, bought it back in 2012, and the wash-sale rules require you to adjust the new lot's basis, the new lot's covered status is determined by when you acquired it in 2012 — it is covered, even though a deferred loss from 2010 is attached to it.

Practical checklist

• For any position you are considering selling, check whether your account shows the acquisition date for each lot before assuming it's covered.
• If your account shows multiple lots under the same ticker, compare each lot's acquisition date against the applicable phase-in date for the security type.
• For DRIP positions that span the 2012 cutoff, expect that some lots are covered and others are not — your broker should distinguish them in the tax lot view.

Why It Matters: The $0 Basis Problem

The practical stakes of uncovered status aren't theoretical. When the IRS receives a 1099-B showing proceeds from a sale but no basis, and your return doesn't include a matching Form 8949 entry, the automated matching system flags the discrepancy. The IRS then issues a CP2000 notice — a proposed assessment — based on the assumption that your basis was zero and the entire proceeds are taxable gain. The IRS isn't guessing maliciously; it's using the only figure it has.

Responding to a CP2000 requires you to produce documentation of your actual basis: original trade confirmations, statements, or other records showing what you paid. For positions acquired in the late 1990s or early 2000s and held through brokerage consolidations, account migrations, and broker closures, this documentation often no longer exists at the broker level. It may survive only in paper statements you received at the time — if you kept them.

The stakes scale with the size of the position. A long-term investor who bought a stock in 1998 for $15,000, held it through appreciation to $80,000, and sells in 2026 would owe capital gains tax on $65,000 of gain if basis is properly documented. If the CP2000 process results in a $0 basis finding, the same investor owes capital gains tax on the full $80,000 — a difference that can amount to tens of thousands of dollars in additional tax, plus interest and penalties if the CP2000 leads to a formal assessment.

The resolution is to report every uncovered sale on Form 8949 yourself, with your best reconstruction of basis, even when your broker's 1099-B shows "basis not reported." This is true even if that basis is itself an estimate based on historical price records rather than a surviving trade confirmation — you must report something, and an accurate estimate supported by documented methodology is defensible. Not reporting at all is not.

Form 8949 and the Six Boxes

Form 8949 is where you reconcile what your broker reported to the IRS with what you actually owe. It has two parts — Part I for short-term capital sales (held one year or less) and Part II for long-term capital sales (held more than one year) — and each part has three checkbox options that correspond directly to covered/uncovered status and to whether the sale appeared on a 1099-B at all.

Box A and Box D: covered securities, basis to IRS

Box A (Part I) and Box D (Part II) are for covered securities where your broker reported cost basis to the IRS. When you complete a Box A or D transaction on Form 8949, the IRS can verify both the proceeds and the basis against the broker's 1099-B filing. If your numbers exactly match the 1099-B and there are no adjustments, some tax software allows you to aggregate all Box A and Box D transactions on a single line and attach the 1099-B summary instead of listing each one — check current IRS instructions for 8949 to confirm whether this shortcut applies to your situation.

Box B and Box E: uncovered securities, proceeds only to IRS

Box B (Part I) and Box E (Part II) are for uncovered securities where your broker reported gross proceeds but not basis. The IRS has the proceeds figure from the broker's 1099-B, but it has no basis. You fill in your own basis on the form, and the IRS cannot automatically verify it — it relies on your representation and your supporting documentation if the return is later examined. These transactions must each be listed individually on Form 8949; they cannot be aggregated and omitted from the form in the same way Box A/D transactions sometimes can.

Box C and Box F: not on a 1099-B

Box C (Part I) and Box F (Part II) are catch-alls for capital transactions not reported on a 1099-B at all — sales through channels that don't issue 1099-Bs, transactions requiring special adjustments that can't be reconciled directly to a 1099-B line, or certain partnership distributions and barter exchanges. These transactions also require individual reporting on Form 8949.

Matching the box correctly

Using the wrong box is a common filing error. If your 1099-B shows a sale as covered (basis reported to IRS) and you report it in Box B or E instead of Box A or D, the IRS's reconciliation system will see a mismatch between the 1099-B category and your Form 8949 category, which can trigger correspondence. The simplest approach: check the "Applicable checkbox on Form 8949" field on each line of your 1099-B — your broker is required to indicate which box applies — and use that box on your Form 8949.

Practical checklist

• Before filing, confirm that every 1099-B line with a "covered" indicator is reported in Box A or D, and every "uncovered" or "basis not reported" line is in Box B or E.
• Never leave an uncovered sale off Form 8949 on the theory that the IRS won't catch it — the 1099-B proceeds are already in the IRS system.
• Retain documentation of reconstructed basis for uncovered positions for at least three years after filing (longer if the position is particularly large).

ACATS Transfers: What Actually Happens to Covered Status

When you move securities between brokers through ACATS (Automated Customer Account Transfer Service), covered status technically transfers with the shares. The securities don't lose their covered classification simply because they changed custodians. This is the rule under IRS guidance: the receiving broker steps into the shoes of the transferring broker for purpose of tracking covered status and basis.

The practice is considerably messier. The ACATS system was designed to transfer securities; it was not originally designed to transfer structured basis data, and the data handoff remains imperfect despite years of industry improvement. Common failure modes include:

• Basis data not transmitted at all. The transferring broker sends the shares without accompanying cost basis and acquisition date information. The receiving broker receives the position with a $0 or "unknown" basis.
• Data transmitted but not accepted. The transferring broker's data export format doesn't match the receiving broker's import format. The position arrives with shares correctly credited but no basis loaded.
• Partial transmission. Some lots transfer with basis data; others arrive without it. This is particularly common for positions with many dividend-reinvestment lots accumulated over years, where the data volume is large and old lots may predate the broker's own electronic records.
• Average cost applied incorrectly. For mutual fund positions where average cost was the elected method, the transferring broker may transmit an average cost figure rather than individual lot information. The receiving broker may not accept average cost elections in transfer, requiring you to reelect.

The IRS holds the receiving broker responsible for maintaining covered status for transferred covered securities, but the broker cannot maintain what it never received. If the basis data didn't transfer, the broker will typically designate the position as covered but report $0 or "unknown" basis on the eventual 1099-B — which, for tax purposes, functions identically to how uncovered status would: the IRS receives the proceeds and no basis. You are in the same position as if the security were uncovered, regardless of its technical classification.

What to do after an ACATS transfer

1. Log in to the new account within 30 days of the transfer completing and pull up the cost basis or tax lot view for every transferred position.
2. Verify acquisition date and per-share basis for each lot. Compare to your own records or the most recent statement from the originating broker.
3. Identify any position showing $0 or "unknown" basis and contact the new broker's cost basis or tax support team immediately. Ask them to initiate a basis transfer request to the originating broker — many brokers have a formal process for this, separate from the ACATS transfer itself.
4. Contact the originating broker directly if the receiving broker cannot obtain the data. Request a detailed tax lot statement or a cost basis transfer document. This is easier while your account records are still active with the originating broker.
5. Keep your own permanent record. Even after successfully transferring basis data, retain your original confirmation statements and the statement you received at the time of transfer showing the basis information, in case records need to be reconstructed years later.

Practical checklist

• Verify basis data for every transferred position before the first sale from the new account — not after.
• Don't assume the transfer is complete just because the shares appear in your new account; basis data moves separately and may still be in transit or stuck.
• If a position will remain held for years before sale, set a calendar reminder to re-verify basis accuracy annually — records can degrade or be overwritten in broker system migrations.

Inherited Shares: Always Covered, But Documentation Still Matters

Inherited securities get special treatment under two separate IRC provisions that interact with the covered/uncovered framework in ways that can be counterintuitive.

The step-up in basis (IRC §1014)

When you inherit securities, your cost basis is reset to the fair market value of the securities at the date of the decedent's death — regardless of what the original owner paid, regardless of how long they held the shares, and regardless of whether those shares were originally covered or uncovered in the decedent's hands. This step-up (or step-down, if the shares lost value) is one of the most significant basis adjustments in the tax code: a position that appreciated by hundreds of thousands of dollars during the original owner's lifetime is inherited with a fresh basis equal to its value at death, and all of that pre-death appreciation permanently escapes income tax.

The practical consequence for the covered/uncovered question: the original acquisition date that determined covered status in the decedent's account no longer governs your account. You inherited the shares, not the holding period.

Inherited shares are always long-term (IRC §1223(11))

A separate rule provides that inherited property is automatically treated as held long-term, regardless of how long you actually hold it after inheriting. If you inherit shares and sell them two months later, the gain or loss is still long-term. This applies whether the decedent held the shares for a day or forty years.

How this interacts with covered status

Inherited shares are treated as covered for Form 1099-B reporting purposes. However, your broker needs to know three things to report basis correctly: that the shares were inherited, the date of the decedent's death, and the fair market value on that date. If any of these aren't loaded into the broker's system, you may see a $0 basis or "unknown" in your account even though the shares are technically covered.

Common situations where documentation gaps arise: inherited shares that were transferred from an estate account to your individual account without basis notation; multiple beneficiaries inheriting fractional shares of the same lot; inherited shares from an estate in a jurisdiction where the broker's systems don't automatically receive the date-of-death FMV. In each case, you'll need to supply the documentation — a copy of the death certificate, an estate account statement or probate inventory showing the date-of-death value, or a historical price record from a financial data service — to your broker's tax support team.

Practical checklist

• After inheriting securities, confirm with the broker that the account shows "inherited" status and the date-of-death FMV for each position.
• Retain a copy of the document used to establish date-of-death FMV — estate inventory, financial statement, or historical price lookup — indefinitely.
• When you eventually sell, verify that your 1099-B reflects the stepped-up basis, not $0 or the decedent's original purchase price.

Legacy Positions: The 1990s and 2000s Problem

The most common real-world covered/uncovered situation isn't a technical edge case — it's the long-term buy-and-hold investor who bought stock in 1997 or 2003, held it through three brokerage mergers and an account consolidation, and is now considering selling. These positions are almost certainly uncovered. The shares were acquired before the 2011 phase-in date, and unless the investor has kept meticulous records across multiple broker transitions, the original cost basis exists only in paper form — or not at all.

Why broker records for pre-2011 equity positions are unreliable

Brokers are not required to maintain cost basis for uncovered securities, and many legacy systems simply don't store it reliably for pre-2011 acquisitions. When brokerage firms have merged or been acquired, the converted systems frequently receive position transfers without accompanying basis data for uncovered lots. Multiple ACATS transfers over the years compound the problem. By the time an investor sells a 25-year-old position, the broker's records may show the correct share count with $0 or "unknown" basis — not because the data was wrong, but because it never made it through multiple system transitions intact.

Reconstructing basis for legacy positions

If your broker can't provide basis for an uncovered position, the IRS does not allow you to claim $0 basis — you must make a reasonable reconstruction and document your methodology. Useful sources include:

• Original trade confirmations — paper or electronic copies you received at the time of purchase. These are the gold standard.
• Original account statements — monthly or annual statements from the purchasing broker, which typically show cost basis in the holdings section.
• Historical price data — if you know the purchase date but lack the confirmation, historical closing price data from a financial data service establishes a reasonable approximation of the per-share price. Document the source and the specific date used.
• Transfer documents — any statement or letter from a prior broker that showed the position's cost when you moved the account. These often reflect what the prior broker had on file even if the data didn't transfer electronically.
• Tax returns — prior years' Schedule D entries for partial sales of the same position can establish the basis methodology you were using at the time.

If you genuinely cannot reconstruct basis for an uncovered security and have no surviving documentation, tax counsel can help you assess the risk of using an estimated basis versus reporting $0 and paying tax on the full proceeds. Reporting $0 is technically the conservative position but may result in significantly higher tax than your actual gain. Using a reasonable estimate with documented methodology is generally preferable — and defensible — to either extreme.

Checklist: Verifying and Correcting Broker Records

Before selling any position that might involve uncovered securities or basis data gaps, work through this checklist.

1. Open the cost basis or tax lot view in your account. Find the specific location in your broker's interface — it may be under "Holdings," "Tax Center," "Cost Basis," or "Positions." If you can't find it, call the broker and ask how to access detailed cost basis information.
2. For each lot, note the acquisition date and per-share cost. Compare acquisition dates against the phase-in dates: pre-2011 equity lots and pre-2012 fund lots are uncovered, regardless of what the broker's interface shows.
3. Flag any lot showing $0 or "unknown" basis. These require action before sale, especially if the position has appreciated — a $0 basis on a covered sale will show up correctly on the 1099-B as covered but with $0 basis reported to the IRS, which still results in a bad tax outcome.
4. Contact the broker's tax or cost basis support team for gaps. Ask specifically about the process for correcting cost basis and what documentation they require. Many brokers have a dedicated team and a formal process; general customer service may not be equipped to handle this.
5. Gather supporting documentation from your own records — original confirmations, statements, transfer documents — and submit them to the broker in the format they request.
6. If shares were transferred in via ACATS, contact the originating broker directly if the receiving broker's basis correction team can't obtain the data. Request a formal tax lot transfer statement or cost basis export in a format the receiving broker will accept.
7. For inherited positions, confirm date-of-death FMV is loaded and that the account reflects "inherited" status. Provide estate documentation if the broker's records don't match.
8. After corrections are loaded, recheck the tax lot view and confirm that the basis figures match your documentation before selling.
9. Keep your own parallel record. A simple spreadsheet with ticker, acquisition date, number of shares, per-share cost, lot type (covered/uncovered/inherited), and source of basis information is your backup if broker records are wrong again in the future.

Misconceptions Versus Reality

Common Mistakes

Two mistakes explain the majority of problems investors encounter with covered and uncovered securities.

Assuming the broker's account interface reflects what the IRS received. Your brokerage account portal may show a cost basis for every holding, even uncovered ones, because the broker tracks the information internally for your benefit. But "cost basis shown in portal" and "cost basis reported to IRS" are not the same thing. The only authoritative record of what was reported to the IRS is the Form 1099-B itself — specifically, the "Applicable checkbox on Form 8949" field and whether the basis column is populated. Always cross-reference the 1099-B, not the online holding display, when preparing your tax return.

Not filing Form 8949 for uncovered sales because the 1099-B doesn't show a basis. Some investors interpret the absence of a basis figure on an uncovered 1099-B line as meaning there's nothing to report. This is exactly backward: the absence of a broker-provided basis means you have to supply your own. Omitting an uncovered sale from Form 8949 doesn't reduce your tax liability — it just leaves a mismatch in the IRS system that generates a notice asserting tax on the full proceeds. Filing Form 8949 with your reconstructed or known basis, even if you're unsure of the precise number, is both legally required and practically better than silence.

Risks, Limitations, and Exceptions

• This guide describes the general cost basis reporting framework under IRC §6045 and the Treasury regulations implementing it; individual situations — particularly those involving corporate actions, partnership interests, or foreign securities — may have additional rules not covered here.
• The phase-in dates described apply to the standard federal framework; some states may have different or additional basis reporting requirements.
• Wash-sale adjustments under IRC §1091 interact with covered/uncovered status in specific ways: disallowed losses are added to the basis of the replacement shares, and whether those adjustments are tracked automatically by your broker depends on whether both the sold and replacement lots are covered in the same account at the same broker.
• Cryptocurrency and certain digital assets are not currently subject to the §6045 broker reporting framework in the same way as traditional securities; separate rules apply, and the regulatory landscape for crypto basis reporting continues to evolve.
• None of this guide constitutes personalized tax or legal advice; consult a tax professional for situation-specific guidance, particularly for large positions, estate-inherited securities, or positions with complex adjustment histories.

Frequently Asked Questions

Sources and Methodology

This guide describes the cost basis reporting framework under IRC §6045 and IRS Form 8949 instructions based on publicly available regulatory guidance and IRS publications as of mid-2026. Key sources include:

• IRS: Instructions for Form 8949 (Sales and Other Dispositions of Capital Assets) and Schedule D; IRS Publication 550 (Investment Income and Expenses); IRS Notice 2011-18 and related cost basis regulations under §6045 document the phase-in framework and covered security definitions described here.
• IRS Publication 551 (Basis of Assets) documents the inherited property step-up in basis under §1014 and the long-term holding period treatment under §1223(11) described in the inherited shares section.
• U.S. Congress / Treasury: The Emergency Economic Stabilization Act of 2008 (Pub. L. 110-343) enacted the IRC §6045 amendments that created the covered/uncovered security framework; the final regulations under §6045 published in 2010 and 2013 established the phase-in dates by security type.
• FINRA: FINRA's guidance on transfer of customer account records and cost basis in ACATS transactions informs the ACATS transfer section.

This content was reviewed by the Swoopr Editorial Team in August 2026 and reflects publicly available information at that time. Tax law and IRS guidance can change; verify current rules directly with the IRS or a qualified tax professional before relying on any specific figure or procedure.

Conclusion

The covered/uncovered distinction is mechanical — it turns on one question per lot: was this security acquired on or after the phase-in date for its type? Equities need January 1, 2011; mutual funds and ETFs need January 1, 2012; complex instruments need January 1, 2014. Everything before those dates is uncovered, and every uncovered lot you ever sell puts the entire burden of basis documentation on you. That's manageable for positions you bought recently, and genuinely difficult for positions accumulated in the 1990s and early 2000s through multiple broker transitions. The time to find those gaps isn't when you're filing a return with a CP2000 already in hand — it's now, while you can still contact the originating brokers, dig up the original confirmations, and get the basis loaded correctly before a sale makes the question urgent. Form 8949's six boxes exist precisely to distinguish what the IRS already knows from what you have to tell them. Know which box applies to each sale, and the system works as intended.

Related Reading

• Stock & Investment Taxes — the parent hub for this content group, covering the full range of stock and investment tax topics.
• Form 1099-B and Cost Basis Reporting — a detailed walkthrough of every field on the 1099-B, how to read the cost basis section, and how it connects to Form 8949.
• Taxes & Rules — the top-level hub covering both brokerage and trading rules and stock and investment tax topics.