Capital Loss Carryover Calculator
Net your short-term and long-term capital gains and losses the way the IRS Schedule D Capital Loss Carryover Worksheet does, see how much you can deduct against ordinary income this year ($3,000, or $1,500 if married filing separately), and how much carries forward to next year.
THIS YEAR'S DEDUCTION
$3,000Against ordinary income (limit $3,000)
SHORT-TERM CARRYOVER
$0LONG-TERM CARRYOVER
$7,000- Net short-term gain/(loss)
- $0
- Net long-term gain/(loss)
- -$10,000
- Total net gain/(loss)
- -$10,000
- Annual deduction limit
- $3,000
- Deductible against ordinary income this year
- $3,000
- Total carried forward to next year
- $7,000
How the Capital Loss Carryover Works
Net ST and LT Separately
First net all short-term gains against short-term losses, and all long-term gains against long-term losses, giving two separate figures.
Combine, Then Check for a Net Loss
Add the net short-term and net long-term results together. If the combined total is a loss, you may be eligible for the ordinary-income deduction.
$3,000 Annual Deduction Limit
IRC §1211(b) caps the amount of net capital loss deductible against ordinary (W-2, interest, etc.) income at $3,000 per year — $1,500 if married filing separately.
Indefinite Carryforward
Losses beyond the annual limit carry forward every year under IRC §1212(b) with no expiration, preserving their short-term/long-term character, until fully used.
Worked example
Single filer with $0 short-term activity and a $10,000 net long-term capital loss for the year.
| Step | Amount |
|---|---|
| Net long-term loss | -$10,000 |
| Net short-term gain/loss | $0 |
| Total net capital loss | -$10,000 |
| Deductible against ordinary income (capped at $3,000) | $3,000 |
| Long-term loss carried forward to next year | $7,000 |
Next year, the $7,000 long-term carryover is netted against that year's gains and losses on the Schedule D worksheet first — if there still isn't enough offsetting gain, another $3,000 deducts against ordinary income and the remaining $4,000 carries forward again.
Frequently asked questions
How much capital loss can I deduct in one year?
Under IRC §1211(b), you can deduct up to $3,000 of net capital losses against ordinary income per year ($1,500 if married filing separately). Any loss beyond that limit carries forward to future tax years — there's no expiration date under IRC §1212(b), and it carries forward indefinitely until fully used or until you die (unused carryovers do not transfer to your estate or heirs).
Does short-term or long-term loss get used first against the deduction?
The IRS Schedule D Capital Loss Carryover Worksheet nets short-term gains/losses and long-term gains/losses separately first. If the combined result is a net loss, the deduction against ordinary income draws from the net short-term loss FIRST, and only dips into the net long-term loss once the short-term loss is exhausted. This matters for character: short-term losses would otherwise offset ordinary-rate short-term gains, while long-term losses are more "valuable" against 0%/15%/20% long-term gains — so using short-term first preserves your long-term losses for future high-value offsetting.
How long can I carry forward a capital loss?
Indefinitely, per IRC §1212(b) — there is no expiration. Each year you either have enough capital gains to absorb the carryover, or you deduct up to $3,000 ($1,500 MFS) against ordinary income and carry the remainder forward again. The carryover keeps its original short-term or long-term character every year until fully used. The only way a carryover is lost is if the taxpayer dies before using it — capital loss carryovers do NOT pass to an estate, surviving spouse (on a separate return), or heirs.
Do capital gains in a later year offset the carryover first?
Yes. In any year you have a carryover, it's netted against that year's new capital gains and losses on the Schedule D worksheet just like current-year losses would be — same-character gains are offset first (ST carryover vs ST gains, LT carryover vs LT gains), with any leftover applied cross-character. Only after full netting does the $3,000 ($1,500 MFS) ordinary-income deduction apply to what's left.
Does married filing separately really halve the limit?
Yes — IRC §1211(b)(2) sets the MFS annual deduction limit at $1,500, exactly half of the $3,000 limit for single, married filing jointly, head of household, and qualifying surviving spouse filers. This mirrors the general MFS pattern of halving joint-filer thresholds and is one of several reasons MFS is usually the more expensive filing choice for couples with investment losses.
Sources
Key Tax Terms
Capital Gains
The profit from selling a capital asset (stocks, real estate, etc.) for more than its purchase price. Capital gains are classified as short-term or long-term based on holding period.
Short-Term Capital Gains
Profits from selling assets held for one year or less, taxed at ordinary income tax rates (10% to 37%). There is no preferential rate for short-term gains.
Long-Term Capital Gains
Profits from selling assets held for more than one year, taxed at preferential rates of 0%, 15%, or 20% depending on your taxable income.
Cost Basis
The original purchase price of an asset (plus adjustments like commissions and reinvested dividends), used to calculate capital gain or loss when you sell.
Wash Sale Rule
An IRS rule that disallows a capital loss deduction if you buy a substantially identical security within 30 days before or after the sale. The disallowed loss is added to the cost basis of the new shares.
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