Tax lot optimizer

Choosing specific lots can change your tax bill. Enter your lots and the sale to compare choices, split short and long-term gains, and check purchases within 30 days for wash sales.

General information, not tax advice. These figures are estimates from the rules and numbers you enter; they ignore your other gains, losses and income. Check with a registered tax agent or adviser before you act.

Selling lowest tax saves an estimated $717.82 in federal tax compared with first in, first out.

Lot choice	Lots sold	Short-term gain	Long-term gain	Est. federal tax
First in, first out	40 from 2020-08-03 (long)	$0.00	$6,136.00	$920.40
Last in, first out	25 from 2026-02-09 (short); 15 from 2023-05-15 (long)	-$385.00	$1,735.50	$202.58
Highest cost first	25 from 2026-02-09 (short); 15 from 2023-05-15 (long)	-$385.00	$1,735.50	$202.58
Lowest tax Lowest tax	25 from 2026-02-09 (short); 15 from 2023-05-15 (long)	-$385.00	$1,735.50	$202.58

Possible wash sale: 10 shares bought within 30 days of selling at a loss; up to $154.00 of the $385.00 loss may be disallowed and added to the new shares' basis.

Do this for your whole portfolio. Mintage keeps every parcel, applies corporate actions and runs this before each sale.

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How it works

Lots held more than one year produce long-term gains, taxed at 0%, 15% or 20% depending on your bracket; shorter holdings are taxed as ordinary income. Most brokers default to first in, first out, but let you pick specific lots before settlement.

If you sell at a loss and buy the same security within 30 days before or after, the wash-sale rule can disallow the loss and add it to the new shares' basis instead. State taxes and the net investment income tax are not included.

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