💰 Finance & Tax

US Tax Deadlines Beyond April 15: Quarterly Payments, Extensions, and More

Updated July 19, 2026

Most people think of taxes as a once-a-year event in mid-April. But if you freelance, run a business, have investment income, or simply owe more than your withholding covers, the IRS expects to hear from you four times a year, and missing those quieter deadlines quietly racks up penalties and interest.

This guide maps the full US tax calendar: the annual filing deadline, the four estimated payment dates, how extensions actually work, and the deadlines that catch people off guard.

The Annual Filing Deadline: Mid-April, With Exceptions

Individual federal income tax returns are generally due in mid-April each year. When the date falls on a weekend or a holiday, the deadline shifts to the next business day, so the exact date moves slightly from year to year. Check the IRS website for the current year’s date rather than assuming.

State returns usually track the federal deadline but not always, and a handful of states have their own quirks. If you live in one state and work in another, you may have two filing deadlines to track, set by each state’s tax agency.

Quarterly Estimated Tax Payments: The Deadline Freelancers Miss

The US tax system is pay-as-you-go. Employees have tax withheld from every paycheck, but if you earn income without withholding, from self-employment, gig work, rental property, or investments, you are generally expected to make estimated tax payments four times a year.

The payment schedule falls in April, June, September, and January of the following year. Note that these are not evenly spaced quarters: the second payment arrives just two months after the first, which is exactly why so many first-year freelancers miss it. Underpaying during the year can trigger a penalty even if you pay everything you owe by April.

Payments are due in April, June, September, and January
The gaps between deadlines are uneven, which trips up new filers
Underpayment penalties accrue during the year, not just at filing time
IRS Form 1040-ES and its worksheet help you estimate each installment

Extensions Extend Filing, Not Payment

Filing an extension is easy and automatic: submit the request by the April deadline and you typically get about six extra months to file your return. This is the single most misunderstood rule in personal taxes, because the extension applies only to the paperwork.

Any tax you owe is still due in April. If you extend and pay in October, interest and late-payment penalties have been accruing the whole time. The right move is to estimate what you owe, pay that amount with your extension request, and then finalize the return when you file.

Other Tax Deadlines Worth a Reminder

Beyond the headline dates, a few recurring deadlines deserve their own reminders. Employers and financial institutions send W-2s and most 1099s early in the year, so late January is when you should start collecting documents. Prior-year IRA and HSA contributions can generally be made up until the April filing deadline, a genuinely useful lever if you want one last deduction.

If you have foreign financial accounts above the reporting threshold, the FBAR filing runs on its own track with an automatic extension. And if you missed a payment or filed late, address it quickly: penalties compound, and the IRS offers payment plans that stop the situation from getting worse.

Frequently asked questions

Who has to pay quarterly estimated taxes?

Generally, anyone who expects to owe tax beyond what withholding covers, most commonly freelancers, contractors, small business owners, and people with significant investment or rental income. The IRS provides worksheets with Form 1040-ES to check whether you need to pay.

Does a tax extension give me more time to pay?

No. An extension gives you roughly six more months to file the return, but any tax owed is still due by the April deadline. Interest and penalties accrue on unpaid balances from that date.

What happens if I miss a quarterly payment?

You may owe an underpayment penalty that accrues from the missed due date, even if you settle up at filing time. Pay as soon as you notice the miss, since the penalty is time-based and stops growing once you pay.

Are the quarterly deadlines really every three months?

No, and that is the trap. The payments fall in April, June, September, and January, so the gaps are two, three, and four months. Set reminders for the actual dates rather than assuming an even quarterly rhythm.

Official sources