Who Can Submit Tax Returns: Thresholds, Deadlines, and Penalties

You need to file a federal tax return for 2026 if your gross income reaches the standard deduction for your filing status — $16,100 for a single filer under 65, $32,200 for a married couple filing jointly, $24,150 for head of household, and effectively any amount at all for someone married filing separately.¹ A handful of situations force you to file below those numbers, and plenty of people who aren’t required to file should do it anyway to recover money.

Income Thresholds by Filing Status

Federal law requires a return from any individual whose gross income equals or exceeds a set amount tied to their filing status.² Gross income covers wages, investment returns, rental income, business profits, and most other money you receive that isn’t specifically exempt.

For tax year 2026, the thresholds match the standard deduction:¹

Single: $16,100
Married Filing Jointly: $32,200
Married Filing Separately: $16,100 by statute, but see below
Head of Household: $24,150

Your status is set by your marital and household situation on December 31 of the tax year. Filers 65 or older get a higher standard deduction, which raises the point at which they have to file.

Married Filing Separately works differently in practice. The statute requires filing from any married person filing separately whose gross income meets the exemption amount, with no exception tied to the standard deduction.² Virtually any gross income triggers a filing requirement under that status.

Lower Thresholds for Dependents

If someone else can claim you as a dependent, different rules apply. For the 2025 tax year (returns due April 2026), a single dependent under 65 must file if any of the following is true:³

Unearned income (interest, dividends, capital gains) exceeds $1,350
Earned income exceeds $15,750
Gross income exceeds the larger of $1,350 or earned income plus $450

This is what catches a teenager with a summer job or investment account. When a child’s only income is unearned and stays under a certain amount, parents can sometimes elect to report it on their own return instead of filing a separate one for the child.⁴ Elderly parents claimed as dependents face their own thresholds tied to Social Security and investment income.

Situations That Require Filing Regardless of Income

Several triggers force a return even when your total income sits well below the standard deduction.

The big one is self-employment. If your net earnings from freelancing, gig work, or any independent business reach $400, you have to file.⁵ Self-employment tax funds Social Security and Medicare and applies separately from income tax, which is why the threshold is so low.

Other filing triggers:

You paid a household employee — nanny, housekeeper, caregiver — $2,700 or more in cash wages during 2026.⁶
You owe alternative minimum tax.
You received taxable distributions from a health savings account.
You received advance premium tax credits through a health insurance marketplace.
You owe the additional tax on an early retirement account withdrawal.

Gig workers and online sellers should also watch for Form 1099-K. Third-party payment platforms like Venmo, PayPal, and Etsy send one if your gross payments exceed $20,000 and you had more than 200 transactions during the year.⁷ Receiving a 1099-K doesn’t mean you owe tax on the full amount, since personal reimbursements and cost of goods sold reduce the taxable portion, but the IRS now knows about the payments.

Reasons to File When You Don’t Have To

Not required doesn’t mean not worth it. The most common reason to file anyway is to get back federal income tax that was already withheld from your paychecks. If your income fell below the threshold, that withholding is money the government is holding for you, and a return is the only way to claim it.

Refundable credits are the other big reason. The Earned Income Tax Credit and the Additional Child Tax Credit can pay out even when you owe zero in tax.⁸ The EITC alone runs into the thousands of dollars for lower-income workers with children. The IRS doesn’t send it automatically. You have to file.

There’s a hard deadline on refund claims. You have three years from the original due date of the return to claim what you’re owed. After that, the money belongs to the government.⁹ A refund for tax year 2022 has to be claimed by April 15, 2026.

Filing on Someone Else’s Behalf

A return can also be filed by someone standing in for the taxpayer. Court-appointed guardians and conservators file for minors and for adults who can’t manage their affairs due to mental or physical incapacity. Executors and personal representatives file a final return for someone who has died, covering January 1 through the date of death.¹⁰

A common misconception concerns Form 2848, Power of Attorney and Declaration of Representative. It authorizes someone to represent you before the IRS — communicating with agents, receiving your tax information, responding to notices.¹¹ It does not give your representative general authority to sign your return. Signing authority is limited to narrow circumstances: serious illness or injury, continuous absence from the United States for at least 60 days before the filing deadline, or specific IRS permission for other good cause.¹²

Deadlines and What Late Costs

Individual federal returns are due April 15. If that date falls on a weekend or holiday, the deadline shifts to the next business day.¹³ Form 4868 buys you an automatic extension until October 15, but only for the paperwork.¹⁴ Any tax you owe is still due by April 15, and interest and penalties accrue on unpaid amounts even with a valid extension.

Skipping a required return is costly. The failure-to-file penalty runs 5% of the unpaid tax for each month your return is late, capped at 25%.¹⁵ Once you’re more than 60 days late, the minimum penalty is $525 or 100% of the unpaid tax, whichever is smaller.¹⁶ The failure-to-pay penalty adds another 0.5% per month on unpaid tax, also capped at 25%.¹⁷ Both penalties run at the same time, though the filing penalty is reduced by the payment penalty amount for any month both apply.

If you owe and can’t pay, file anyway. The filing penalty is ten times the payment penalty rate. Filing on time and setting up an IRS-approved payment plan cuts the payment penalty in half, to 0.25% per month.¹⁷

1
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
2
Office of the Law Revision Counsel. 26 USC 6012 – Persons Required to Make Returns of Income
3
Internal Revenue Service. Check if You Need to File a Tax Return
4
Internal Revenue Service. Publication 501 – Dependents, Standard Deduction, and Filing Information
5
Office of the Law Revision Counsel. 26 USC 6017 – Self-Employment Tax Returns
6
Internal Revenue Service. Publication 926 – Household Employer’s Tax Guide
7
Internal Revenue Service. IRS Issues FAQs on Form 1099-K Threshold Under the One, Big, Beautiful Bill
8
Internal Revenue Service. Refundable Tax Credits
9
Office of the Law Revision Counsel. 26 USC 6511 – Limitations on Credit or Refund
10
Internal Revenue Service. About Publication 559, Survivors, Executors and Administrators
11
Internal Revenue Service. About Form 2848, Power of Attorney and Declaration of Representative
12
Internal Revenue Service. Instructions for Form 2848
13
Internal Revenue Service. Act Now to File, Pay, or Request an Extension
14
Internal Revenue Service. Get an Extension to File Your Tax Return
15
Office of the Law Revision Counsel. 26 USC 6651 – Failure to File Tax Return or to Pay Tax
16
Internal Revenue Service. Failure to File Penalty
17
Internal Revenue Service. Failure to Pay Penalty