How much capital gains tax do I pay on $100,000?
If $100,000 is the only long-term gain for the year — you generally pay zero Washington capital gains excise tax. The standard deduction for 2025 is $278,000 — so a $100,000 gain is well under the limit.
When could $100,000 still generate a Washington bill?
A $100,000 gain may still be taxed if it is part of a larger year. If the total gains for the year are over the amount for the standard deduction — this specific $100,000 contributes to the taxable amount.
General situations that have the potential to change the outcome:
- Multiple sales — you sold several investments — and the total is higher than the deduction
- Asset type — the profit comes from an asset Washington specifically taxes — stocks & business interests — rather than exempt assets
- Allocation — the gain is connected to Washington because you lived here when you sold it or the property was located here
How do you estimate it in 3 steps?
- Add it up — total all the long-term gains that are connected to Washington for the year
- Subtract exemptions — remove any gains from the exempt categories
- Apply the math — the $278,000 standard deduction should be subtracted from the remaining number — if there is remaining amount, 7% should be applied to the first million and 9.9% to the rest
Does the IRS tax a $100,000 gain too?
Yes — federal capital gains tax is separate. The rate varies with how long the asset was held as well as the total taxable income.
How can Clarity Tax Group help?
Our team is ready to review your transaction to confirm exactly how Washington will treat it. Clarity Tax Group presents professional state- and federal-level compliance support.
- Locate which of the sales count and which are exempt
- Check the specific Washington allocation rules in accordance with where you live
- Prepare the forms and establish a smart plan for payment before the deadline