How much capital gains tax on $100,000?

The final amount comes down to how long the asset was held and the overall income for the year.

In general terms, the federal tax on a $100,000 long-term gain falls somewhere between $0 — $23,800. This is parallel to the rates of 0% to 20%, plus a potential 3.8% extra tax. In the case of holding the asset for a short time, that $100,000 gets taxed just like the regular paycheck.

Does Washington charge capital gains tax on $100,000?

If the total Washington capital gains for the year equal exactly $100,000, taxpayers will owe the state $0. Because Washington presents a generous standard deduction of $278,000 for the 2025 tax year — which is filed in 2026

Washington's tax only kicks in for specific long-term profits — like stocks &bonds and business sales — and it completely ignores real estate sales.

Was the asset held for more than 1 year?

3 main things control the federal tax bill: the amount of time you owned the asset, the total taxable income, and whether the Net Investment Income Tax applies to you.

What’s your taxable income after the sale?

Selling something you owned for a year or less usually generates short-term taxes. Holding onto it for more than 1 year generally qualifies you for lower, long-term tax rates.

Will the 3.8% Net Investment Income Tax apply?

The NIIT is an extra 3.8% charge on investment profits. You only have to pay this if the adjusted gross income crosses $200,000 as a single filer or $250,000 in the case of married filing jointly.

Are you dealing with a special asset type?

Not all profits match neatly into the standard 0%, 15% or 20% buckets. Collectibles, art or real estate with depreciation obtain entirely distinct taxation rules.

How can you estimate the tax on $100,000 fast?

1. Check the calendar — look at how long the asset was owned to see if the gain is short-term & long-term
2. Combine the income — add the $100,000 profit to the regular income to locate the total taxable income
3. Find the bracket — pick the matching federal rate from the table above (if it is a long-term gain)
4. Check for the extra tax — check the total income to see if you hit the threshold for the 3.8% NIIT
5. Factor in your state — if you live in Washington, see if the total state gains are above the $278,000 deduction

Reach out to our team at Helium Day Tax & CPAs. We are ready to look over the sale, locate the correct tax rates and manage federal & Washington state documentation.