Capital gains tax is due on April 15 of the year after you sell an investment

When you sell a stock, bond, rental property, or other investment for more than you paid for it, the profit is capital gains. You owe federal tax on that gain, and the important date to report it and pay is the same as your regular income tax important date: April 15 (or the next business day if April 15 falls on a weekend or holiday).

The IRS does not send you a separate bill for capital gains tax. Instead, you report the gain on your tax return—either Form 1040 with Schedule D if you have significant gains, or directly on Form 1040 if you have only a few small gains. The tax you owe is calculated as part of your total income tax liability.

If you owe a large amount and did not have enough tax withheld during the year, you may need to make estimated tax payments before April 15. The rules for estimated payments depend on how much you expect to owe and whether you are self-employed.

Key Takeaways

  • Capital gains tax is reported and paid by April 15 of the year following the sale, as part of your annual income tax return.
  • Short-term gains (assets held one year or less) are taxed as ordinary income at your regular tax rate; long-term gains (assets held over one year) usually have lower tax rates.
  • Your broker will send you a Form 1099-B or 1099-S documenting the sale, which you use to fill out Schedule D on your tax return.
  • If you expect to owe more than $1,000 in tax for the year, you may need to make quarterly estimated tax payments starting in April of that same year.
  • State income tax on capital gains is also due by April 15 in most states, though a few states do not tax capital gains at all.

Short-term versus long-term capital gains have different tax rates and important date

The tax rate you pay depends on how long you held the asset before selling it. Short-term capital gains are profits from assets you owned for one year or less. These are taxed at your ordinary income tax rate, which can be as high as 37 percent depending on your income bracket.

Long-term capital gains are profits from assets you owned for more than one year. These are taxed at preferential rates: 0 percent, 15 percent, or 20 percent, depending on your income level. Long-term rates are almost always lower than short-term rates, which is why holding an investment longer can save you money on taxes.

Both types are reported on the same April 15 important date. The difference is only in the tax rate applied. When you fill out Schedule D, you list short-term gains in one section and long-term gains in another, and the IRS calculates the tax owed on each separately.

How to report capital gains on your tax return

Your broker or investment firm will send you a Form 1099-B (for stocks and mutual funds) or Form 1099-S (for real estate) by January 31 of the year after the sale. This form shows the sale price, the date sold, and sometimes the cost basis—what you originally paid for the asset.

You use this form to fill out Schedule D, which is the IRS form for reporting capital gains and losses. Schedule D has two sections: one for short-term gains and losses, and one for long-term gains and losses. You list each sale separately, calculate the gain or loss, and add up the totals.

If your total gains are small and you have no losses, you may be able to report them directly on Form 1040 without using Schedule D. Your tax software will tell you which forms you need based on your situation. If you have losses, you can use them to offset gains, and if losses exceed gains, you can deduct up to $3,000 of the loss against other income in that year.

Estimated tax payments if you expect to owe a large amount

If you sell a major investment during the year and expect your total tax bill to be significantly higher than what your employer is withholding from your paycheck, you may owe estimated tax payments. These are quarterly payments you make directly to the IRS in April, June, September, and January.

You are generally required to make estimated payments if you expect to owe $1,000 or more in tax for the year (or $500 if you are self-employed). The first payment is due April 15 of that same year—not the following year. If you do not make estimated payments when required, the IRS may charge you a penalty and interest, even if you pay the full amount by April 15 of the following year.

To calculate estimated payments, you can use Form 1040-ES, which walks you through estimating your income, deductions, and tax for the year. You can also adjust your withholding with your employer if you have a job, which may be simpler than making separate estimated payments.

State capital gains tax important date

Most states that have an income tax also tax capital gains, and the state important date is the same as the federal important date: April 15. You report state capital gains on your state income tax return, which you file at the same time as your federal return.

A few states do not tax capital gains at all: Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington, and Wyoming. If you live in one of these states, you owe federal capital gains tax but no state tax on the gain. If you live in a state that does tax capital gains, the state rate varies—some states tax capital gains as ordinary income, while others have separate rates.

If you sold an asset in a state where you do not live, you may owe tax to both your home state and the state where the asset was located. This is rare for stocks and mutual funds, but common for real estate. Your tax software or a tax professional can help you figure out which states you owe tax to.

What happens if you miss the April 15 important date

If you do not file your tax return by April 15, the IRS charges a failure-to-file penalty of 5 percent of the unpaid tax for each month the return is late, up to 25 percent. If you file late but owe no tax, there is no penalty. If you owe tax but do not pay by April 15, you also owe a failure-to-pay penalty of 0.5 percent per month, plus interest on the unpaid amount.

You can request an extension to file your return, which gives you until October 15 to submit it. However, an extension to file is not an extension to pay—you still owe the tax by April 15, and penalties and interest accrue on any unpaid amount. To request an extension, file Form 4868 by April 15.

If you cannot pay the full amount by April 15, you can set up a payment plan with the IRS. A short-term plan (120 days or less) has no setup fee, while a long-term installment agreement has a fee of $31 to $225 depending on how you pay. Setting up a plan before the important date reduces penalties and shows the IRS you are trying to comply.

Frequently Asked Questions

Do I have to pay capital gains tax if I reinvest the money?

Yes. The tax is based on the profit you made, not on what you do with the money afterward. Even if you when ready reinvest the proceeds into another investment, you still owe tax on the gain from the sale. The only exception is if you sold real estate and bought another property under specific rules (like a 1031 exchange), which allows you to defer the tax.

What if I sold an investment at a loss?

Capital losses reduce your capital gains dollar-for-dollar. If you have $5,000 in gains and $2,000 in losses, you report a net gain of $3,000. If losses exceed gains, you can deduct up to $3,000 of the excess loss against other income in that year. Any remaining loss carries forward to future years.

When do I owe tax on inherited investments?

Inherited investments receive a "step-up in basis," meaning your cost basis is reset to the value on the date of death. If you sell the investment shortly after inheriting it, you owe little or no capital gains tax. You only owe tax on gains that occur after you inherit it. This applies to inherited stocks, real estate, and most other assets.

Can I deduct investment losses against my regular income?

You can deduct up to $3,000 of net capital losses against wages, salary, and other ordinary income in a single year. If your losses are larger than $3,000, the excess carries forward to future years, where you can deduct another $3,000 per year until the loss is used up.

Do I report capital gains if my broker handles everything?

Yes. Even if your broker manages the account and makes trades on your behalf, you are responsible for reporting the gains on your tax return. Your broker sends you a Form 1099-B showing all the sales, and you report them on Schedule D. If you do not report them, the IRS will eventually notice the discrepancy and contact you.