What Happens to Your Holding Period After a Wash Sale? (w/Examples) + FAQs

This article reflects federal rules as of June 2026 and covers tax year 2025 (the 2026 filing season). State conformity is addressed in its own section. Tax law changes — confirm current figures before you file.

Quick Answer

Your holding period carries over. After a wash sale, the time you held the stock you sold at a loss gets added to the holding period of the replacement shares you bought. So your new shares are treated as if you owned them since you first bought the old ones, for tax year 2025.

When the wash sale rule blocks your loss, two things happen at once, and people forget the second one. Your disallowed loss gets added to the cost basis of your replacement shares, and the clock you started on the old shares keeps running on the new ones. That second part — the holding period “tacking” — decides whether a future gain is taxed at the lower long-term rate or the higher short-term rate, and it can quietly save or cost you real money.

The rule lives in Internal Revenue Code Section 1091 and the holding-period carryover sits in IRC Section 1223(3). The stakes are not small: brokers reported wash sale loss disallowances on a large share of active trading accounts, and the IRS Publication 550 instructions confirm the carryover applies to “substantially identical” stock you buy in a wash sale.

Here is what you will learn:

• 📅 How the 61-day window decides whether you even have a wash sale.
• 🔗 How your old holding period “tacks” onto your replacement shares, step by step.
• 💵 A fully worked dollar example showing the tax saved (or lost) from the carryover.
• ⚠️ The seven mistakes that turn a smart tax move into a frozen loss.
• 🧾 Exactly how to report it on Form 8949 and Schedule D, with the right code.

What a Wash Sale Actually Is

A wash sale happens when you sell a stock or security at a loss and then buy the same — or a “substantially identical” — security within 30 days before or 30 days after that sale. That window is 61 days total: the day of the sale, the 30 days before it, and the 30 days after it, as explained in IRS Publication 550, chapter 4.

The rule only applies to losses. If you sell a stock at a gain, there is no wash sale, no matter what you buy afterward. The whole point of Section 1091 is to stop you from claiming a tax loss while keeping the same economic position in the security.

When a sale is flagged as a wash sale, you cannot deduct the loss in the year of the sale. Instead, the disallowed loss is deferred, not destroyed. You get it back later through a higher cost basis and a longer holding period on the shares you bought to replace the ones you sold.

The consequence of ignoring this is concrete. If you harvest a $4,000 loss in December and buy the same stock back on January 5, the IRS disallows the $4,000 loss for that year, and your tax bill for that year does not drop the way you expected. The fix is automatic but delayed — you only realize the benefit when you finally sell the replacement shares without triggering another wash sale.

A common misconception is that a wash sale makes your loss disappear forever. It does not, for ordinary taxable accounts. The loss moves into the basis of your new shares. The one place it can vanish permanently is when the replacement shares are bought inside an IRA or Roth IRA, which we cover below.

The Core Question: What Happens to Your Holding Period

Here is the heart of the matter. When a wash sale disallows your loss, the holding period of the shares you sold gets added to the holding period of the replacement shares. This is the carryover, or “tacking,” rule from IRC Section 1223(3).

The statute is blunt about it. In determining how long you held the replacement shares, “there shall be included the period for which he held the stock or securities the loss from the sale or other disposition of which was not deductible.” Revenue Ruling 71-520 backs this up, and IRS Publication 550 restates it plainly: “Your holding period for substantially identical stock or securities you acquire in a wash sale includes the period you held the old stock or securities.”

So your replacement shares do not start a fresh clock on the day you buy them. They inherit the start date of the original shares. If you held the old shares for eight months, your new shares already count as held for eight months the moment you buy them.

Why does this matter so much? Because the U.S. taxes long-term capital gains (assets held more than one year) at lower rates — 0%, 15%, or 20% for tax year 2025 — while short-term gains are taxed at your ordinary income rate, which can run up to 37%. The tacked holding period decides which side of the one-year line your future sale falls on.

This carryover is a double-edged sword. On the good side, it can push a future gain into the lower long-term rate sooner than you would expect. On the bad side, it locks you into a position whose true cost basis and timeline you must track by hand, because brokers do not always get it right across accounts.

How the “More Than One Year” Test Works

The long-term threshold is “more than one year.” You must hold an asset for at least a year and a day to get the long-term rate. The clock starts the day after you buy and ends on the day you sell, as described in IRS Publication 550.

When tacking applies, you use the original purchase date as the start of the clock. So if you bought the first batch on March 1, 2024, sold at a loss, and rebought in a wash sale, your replacement shares are measured from March 1, 2024 — not from the rebuy date.

The consequence is direct: a position you have “owned” for only a few weeks on paper can already qualify for long-term treatment because the tacked clock crossed the one-year mark. Always trace the chain back to the very first lot to know your real holding date.

A Fully Worked Example (with Real Numbers)

Let’s walk the math so you can copy it. These figures are illustrative and use tax year 2025 rates.

Maria buys 100 shares of a tech stock on February 1, 2025, paying $50 per share, for a total cost of $5,000. By November, the stock has dropped, and on November 20, 2025, she sells all 100 shares for $40 each, getting $4,000. Her loss is $1,000 ($5,000 cost − $4,000 proceeds).

Ten days later, on November 30, 2025, Maria buys 100 shares of the same stock again at $42 per share, for $4,200. Because she rebought within 30 days, this is a wash sale, and her $1,000 loss is disallowed for 2025.

Now the two adjustments kick in. First, the basis: her $1,000 disallowed loss is added to the $4,200 cost of the new shares, giving an adjusted basis of $5,200. Second, the holding period: her new shares inherit the February 1, 2025 start date from the original lot, not the November 30 rebuy date.

The payoff comes later. Suppose Maria sells the replacement shares on February 5, 2026 for $6,000. On paper she only “owned” the new shares for about two months. But thanks to tacking, her holding period runs from February 1, 2025 — more than one year — so her $800 gain ($6,000 − $5,200 adjusted basis) is taxed at the long-term rate. At a 15% long-term rate, she pays $120, versus $296 if that $800 were taxed as short-term at a 37% ordinary rate. The carryover saved her $176.

Which Situation Applies to You?

The holding-period result depends on who you are and where you rebought. Find your case below.

• You rebought in the same taxable brokerage account. Standard rules apply — basis goes up, holding period tacks. Your broker usually reports this on your 1099-B.
• You rebought in a different taxable account (or your spouse did). The wash sale still applies, but brokers often miss cross-account wash sales, so you must adjust by hand.
• You rebought inside an IRA or Roth IRA. This is the danger zone — your disallowed loss is permanently lost and is not added to any basis, under Revenue Ruling 2008-5.
• You are an active trader without a mark-to-market election. Wash sales can stack across dozens of trades, snowballing deferred losses and tangled holding periods.
• You are dealing with options or short sales. Tacking still applies, but the holding-period math gets more complex when contracts are exercised or assigned.

How the Holding Period Tacks With Options and Mutual Funds

Wash sales are not limited to plain stock. They also apply to options and contracts to acquire substantially identical securities, as noted in IRS Publication 550. Selling a stock at a loss and then buying a call option on the same stock within the window can trigger a wash sale.

For options traders, the holding period of the replacement position still tacks back to the original lot, but the start date can shift around exercise and assignment dates. The general rule is that the period during which you did not actually hold the underlying stock is not counted, which can move your effective holding-period start date forward by the number of days the shares were not held.

Mutual funds and ETFs follow the same logic. Buying a fund that is substantially identical to one you just sold at a loss — including reinvested dividends that buy new shares automatically — can trip the rule. Reinvested dividends are a frequent, accidental trigger, because they quietly buy replacement shares inside the 61-day window.

The consequence here is subtle: an automatic dividend reinvestment of even a few dollars can disallow part of a much larger loss and tack the holding period on those few replacement shares. The fix is to turn off automatic reinvestment in any fund you plan to harvest losses from.

Crypto and the Wash Sale Rule

As of tax year 2025, the federal wash sale rule under Section 1091 applies to “stock or securities.” The IRS currently treats cryptocurrency as property, not a security, so direct crypto-to-crypto wash sales are not covered by the rule today.

That means if you sell Bitcoin at a loss and rebuy it minutes later, the loss is generally allowed, and there is no holding-period tacking — your rebuy starts a fresh clock. This is a genuine gap, and it has been targeted by proposed legislation more than once.

The consequence and caution: this is an unsettled area, and Congress has repeatedly proposed extending wash sale rules to digital assets. The IRS has not finalized a rule applying Section 1091 to crypto, so treat any “crypto is exempt forever” advice with care and confirm before you file. If you hold a crypto security — like certain tokenized stocks or a stock-based crypto ETF — the normal securities rules can apply.

Reporting It: Form 8949 and Schedule D

You report a wash sale on Form 8949, which feeds into Schedule D. Form 8949 is where you list each sale; Schedule D is where the totals are summed and your net capital gain or loss is figured.

The key entry is the adjustment code. In column (f) of Form 8949 you enter code W for a wash sale, and in column (g) you enter the disallowed loss as a positive number, which cancels out that part of your loss. Your broker usually pre-fills this on the 1099-B for same-account wash sales.

Holding period drives which part of Form 8949 you use. Short-term sales go in Part I; long-term sales go in Part II. Because tacking can flip a sale to long-term, the carried-over holding period decides whether a transaction belongs in Part I or Part II — getting this wrong changes your tax rate.

The deadline is the regular filing deadline, generally April 15, 2026, for 2025 returns (or October 15, 2026, with an extension). If you mishandle the report, the consequence is an IRS notice (often a CP2000) proposing extra tax, plus a possible 20% accuracy-related penalty on the underpayment. If you need a refresher, see a guide on how to fill out Form 8949 and the broader wash sale rule explained.

Federal vs. State: Does Your State Follow This?

The wash sale rule and its holding-period carryover are federal rules. Whether your state mirrors them depends on how that state’s income tax connects to federal law.

Most states that have an income tax start from your federal adjusted gross income or federal taxable income, so the wash sale adjustment and the tacked holding period flow through automatically. In those states, you do not redo the math — the disallowed loss and adjusted basis are already baked into the federal numbers you carry over.

A handful of states have no individual income tax at all — including Florida, Texas, Washington, Nevada, South Dakota, Wyoming, Tennessee, and Alaska. In those states, there is no state-level capital gains tax on this income, so the holding-period question simply does not arise at the state level, though the federal rule still applies in full.

The caution: a few states with their own quirks or partial conformity can diverge, and most states do not give a preferential long-term rate the way the federal system does. Always confirm with your state’s department of revenue, because guessing at conformity misleads you.

Comparison: Wash Sale vs. a Normal Loss Sale

The difference between a clean loss and a wash sale comes down to timing and what happens to your clock.

If You Do This	Here Is What Happens to Basis and Holding Period
Sell at a loss and stay out 31+ days	Loss is deductible now; if you rebuy later, the new shares start a fresh holding period.
Sell at a loss and rebuy within 30 days	Loss is disallowed and added to new basis; old holding period tacks onto the new shares.
Sell at a gain and rebuy immediately	No wash sale at all; gain is taxable; new shares start a fresh clock.

Scenario Table: The IRA Trap

This is the costliest wash sale mistake, so it gets its own table.

What the Investor Did	The Tax Result
Sold stock at a $3,000 loss in a taxable account, rebought in a Roth IRA within 30 days	Loss is permanently disallowed; it is not added to the IRA’s basis, so it vanishes.
Sold at a loss in taxable, rebought the same stock in the same taxable account	Loss is deferred into the new basis; holding period tacks; benefit is recovered later.
Sold at a loss, waited 31 days, then rebought in the IRA	No wash sale; loss is fully deductible; clean result.

Scenario Table: Year-Straddling Wash Sale

A wash sale that crosses December 31 confuses many filers.

The Timing	The Consequence for Your Return
Sold at a loss December 20, 2025; rebought January 5, 2026	Loss is disallowed on the 2025 return; basis and holding period adjust on the 2026 shares.
Sold at a loss November 2025; rebought December 2025 (same year)	Loss disallowed for 2025; both legs land on the 2025 return.
Sold at a loss December 2025; never rebought within 30 days	Loss is fully deductible on the 2025 return.

Three Named Examples

James, the year-end harvester. James sells a fund on December 28, 2025, locking in a $2,500 loss, then rebuys it on January 6, 2026. The wash sale disallows his $2,500 loss for 2025, adds it to the new basis, and tacks his old holding period. He expected a $2,500 deduction and got none — a hard lesson in the 61-day window.

Priya, the dividend reinvestor. Priya sells a stock at a $5,000 loss but forgot her account auto-reinvests dividends. A $40 dividend bought 1 share inside the window, triggering a partial wash sale on that share. A tiny reinvestment froze part of her loss and tacked the holding period on that one share.

Wei, the long-term winner. Wei bought shares January 2, 2025, sold at a loss in October, and rebought in a wash sale 5 days later. When he sells in January 2026 at a gain, tacking dates his holding period to January 2, 2025, so his gain is long-term and taxed at 15% instead of his 32% ordinary rate.

Mistakes to Avoid

• Rebuying within 30 days after harvesting a loss. This disallows the very loss you were trying to claim, deferring the tax benefit.
• Forgetting the 30 days before the sale. The window is 61 days total; a purchase shortly before your loss sale also triggers it.
• Ignoring dividend reinvestment. Auto-reinvested shares inside the window create accidental wash sales and freeze part of your loss.
• Rebuying in your IRA or Roth IRA. Under Revenue Ruling 2008-5, the loss is permanently lost — the worst outcome.
• Assuming a spouse’s account is safe. A purchase by your spouse or a controlled entity counts, and the loss is disallowed.
• Mis-classifying the sale as short-term. Skipping the tacked holding period can put the sale in the wrong part of Form 8949 and overtax your gain.
• Trusting the 1099-B blindly across accounts. Brokers track wash sales per account, so cross-account wash sales go unreported and must be fixed by you.

Do’s and Don’ts

• Do wait at least 31 days before rebuying if you want the loss now — it keeps the deduction clean.
• Do track your true cost basis and original purchase date by hand when tacking applies, because that date sets your tax rate.
• Do turn off automatic dividend reinvestment in any account where you harvest losses, to avoid accidental triggers.
• Do buy a similar-but-not-identical security to stay invested without a wash sale, since that avoids the “substantially identical” trap.
• Do keep your trade confirmations, because you may need to reconstruct the holding-period chain years later.
• Don’t rebuy the same stock in an IRA — the loss disappears for good.
• Don’t assume crypto rules are settled — Congress keeps proposing changes, so confirm before relying on the gap.
• Don’t forget the day-after start and day-of-sale end when counting to “more than one year.”
• Don’t ignore an IRS notice about a wash sale — respond before the deadline to avoid penalties.
• Don’t rely on a broker to net wash sales across two firms, because they cannot see each other’s data.

Pros and Cons of the Holding-Period Carryover

• Pro: It can convert a future gain to long-term sooner, lowering your rate, because the old clock keeps running.
• Pro: Your loss is preserved, not destroyed, in a taxable account — you recover it through higher basis.
• Pro: It rewards long-term investors who accidentally trip the rule, since the tacked time often crosses the one-year line.
• Pro: It keeps your tax outcome economically fair by matching the true length of your investment.
• Con: It forces manual recordkeeping, because brokers misreport across accounts and the real date is easy to lose.
• Con: It defers your loss, hurting cash flow in the year you expected a deduction.
• Con: In an IRA, there is no carryover at all — the benefit is simply gone.
• Con: It complicates options and short-sale math, where the start date shifts with exercise and assignment.

When to Call a Professional

This article is educational and is not a substitute for advice from a licensed tax professional for your specific situation. Most single-stock, single-account wash sales are simple enough to handle yourself with the 1099-B.

You should bring in a CPA or tax attorney when wash sales stack across many trades, span multiple accounts or a spouse’s account, involve options or short sales, or touch an IRA. A professional can reconstruct your holding-period chain, file Form 8949 correctly, and respond to an IRS notice — work that typically runs from a few hundred dollars for a simple return to more for active-trader reconciliation.

What to Do Next

1. Pull every 1099-B and trade confirmation for the year and flag any sale marked with code W.
2. For each wash sale, write down the original purchase date — that date, not the rebuy date, is your holding-period start.
3. Confirm whether each replacement lot is short-term or long-term using the tacked date, then place it in Part I or Part II of Form 8949.
4. Check that no replacement shares were bought in an IRA, a spouse’s account, or through dividend reinvestment.
5. File Form 8949 and Schedule D with your return by April 15, 2026 (or October 15, 2026, with an extension), and keep your records for at least three years.

FAQs

Does my holding period reset after a wash sale? No. It does not reset. The holding period of the shares you sold at a loss is added to your replacement shares under Section 1223(3), so the old clock keeps running on the new shares.

Does the wash sale holding period start on the rebuy date? No. It starts on the original purchase date of the shares you sold. The replacement shares inherit that earlier start date, which can make them long-term sooner.

How long is the wash sale window? 61 days. It covers the 30 days before the sale, the day of the sale, and the 30 days after, as stated in IRS Publication 550 for tax year 2025.

What happens to the disallowed loss? It is added to your basis. In a taxable account the disallowed loss increases the cost basis of your replacement shares, so you recover it when you finally sell them.

Can a wash sale ever make my loss permanent? Yes. If you rebuy the substantially identical security inside an IRA or Roth IRA, the loss is permanently disallowed and is not added to any basis, per Revenue Ruling 2008-5.

Does the wash sale rule apply to crypto in 2025? No. For tax year 2025 the IRS treats crypto as property, not a security, so direct crypto wash sales are not covered. This is unsettled, and Congress has proposed changing it.

What code do I use on Form 8949 for a wash sale? Code W. Enter it in column (f) and the disallowed loss as a positive number in column (g) of Form 8949.

Does buying in my spouse’s account trigger a wash sale? Yes. Purchases by your spouse or a controlled entity within the window count, and your loss is disallowed just as if you bought the shares yourself.

Do reinvested dividends cause wash sales? Yes. Automatically reinvested dividends that buy shares inside the 61-day window can trigger a partial wash sale and tack the holding period on those new shares.

Does my state follow the federal wash sale rule? Usually yes. Most income-tax states start from federal income, so the adjustment flows through. No-income-tax states like Florida and Texas do not tax this at the state level. Confirm with your state agency.

Is a wash sale loss gone forever in a taxable account? No. It is deferred, not lost. The loss moves into the basis of your replacement shares and is recovered when you sell them outside a new wash sale window.

Does tacking help me reach the long-term rate? Yes. Because the old holding period carries over, a future gain can qualify for the lower long-term rate (0%, 15%, or 20% for 2025) sooner than the rebuy date alone would allow.