This calculator supports UK/US assumptions only. Choose the applicable market in the calculator or its named UK/US tool. Israeli rules are not implemented.
Investing & Tax · 06
How much can harvesting save you?
Realised gains this tax year and losing positions still in the portfolio? Harvesting losses can offset the gain one-for-one. See your saving.
Region
Your taxable book
Realised gains so far, unrealised losses on positions you could sell, and the allowance you have already used.
$
$
Tax saved by harvesting
$1,200
Harvest of losses to cut this year's bill by
Net gain after harvest
$12,000
Losses carried forward
$0
With vs without harvest
US: wash-sale rule blocks repurchase of a substantially identical security within 30 days. Excess losses up to $3,000/yr offset ordinary income; rest carries forward indefinitely.
Illustrative figures only. Wash-sale and share-matching rules vary by jurisdiction and broker; this is not tax advice. For your specific situation, consult a qualified adviser.
Every gain, weighed against losses.
Worth tracks gains, losses, and the allowance window across every account so the harvest happens before the tax-year deadline rather than the night before. Join the waitlist.
Frequently asked questions
How is harvesting different from just selling losers?
Harvesting specifically means selling losers solely for the tax benefit, then maintaining overall portfolio allocation by buying a similar-but-not-identical asset. The harvested loss is locked in to offset gains or carry forward. Capitulation selling achieves the same tax outcome but with worse market-timing risk.
What if I have more losses than gains?
UK: unused losses carry forward against future capital gains indefinitely, but must be claimed within four years of the loss tax year. US: excess losses up to a few thousand a year can offset ordinary income; the remainder carries forward indefinitely. Either way, harvested losses do not expire.
When should I harvest?
Throughout the year, opportunistically. Many investors do a sweep near tax-year end. Waiting until the deadline often means missing opportunities: markets recover, losing positions return to flat or positive, and the harvest opportunity is gone.
Does this apply to retirement accounts?
No. Harvesting only works in taxable brokerage accounts. Inside an ISA, SIPP, 401(k), IRA or similar wrapper, gains and losses are sheltered already, so there is nothing to harvest.
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