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Capital Gains Tax Calculator — Married Filing Jointly 2025

Married filing jointly brackets are roughly double the single thresholds for long-term capital gains. NIIT generally begins above $250,000 MAGI for MFJ.

Capital Gains Calculator

Federal · NIIT · All 50 states

2026 ratesIRS verified

Follow the three steps, save the sale, then calculate. Required fields are marked with *.

Your tax profile

These apply to every sale in this estimate.

What you sold

Prices and quantity for this lot. Give it a name if you will add more than one sale.

Asset type

When you bought and sold

The IRS uses these dates to decide short-term vs long-term rates.

Next: Save this sale to the order log, then click Calculate now. Tax results do not update until you calculate.

Order log

Sales included in this tax estimate.

Please fill in the details to see your results. Follow the three steps on the left, then save a sale here.

Married filing jointly capital gains

Married filing jointly (MFJ) offers the widest long-term capital gains brackets among common statuses. For 2025, the 0% LTCG bracket for joint filers generally runs through roughly twice the single threshold, with the 15% and 20% cutoffs similarly scaled. That wider window is why many couples prefer joint filing when both have income.

NIIT for MFJ generally starts above $250,000 MAGI. The Section 121 primary-residence exclusion can also be up to $500,000 for qualifying joint filers when both spouses meet the use test (with limited exceptions).

Compare outcomes with married filing separately only when there is a specific reason — MFS often has narrower brackets and a lower $125,000 NIIT threshold. State community-property rules can also affect how income is split.

Use the calculator with MFJ selected, then layer your state. Not tax advice — confirm with a CPA for large dual-income or property sales.

Comparesingle,married filing jointly,head of household, andmarried filing separately·Methodology

FAQ

Frequently asked questions

Is the Section 121 home exclusion higher for MFJ?

Yes. Qualifying married couples filing jointly may exclude up to $500,000 of primary residence gain if both spouses meet the use test (with limited exceptions).

What is the MFJ NIIT threshold?

Married filing jointly generally faces NIIT when MAGI exceeds $250,000. The surtax is 3.8% on net investment income subject to the statutory formula.

Are MFJ LTCG brackets exactly double single?

They are roughly double, but always use the official IRS revenue procedure amounts for the tax year — inflation adjustments are published annually.