Federal tax payments follow a quarterly schedule, not a monthly one like most bills
If you owe federal income tax, you make estimated quarterly payments rather than one annual payment. These are due on specific dates set by the IRS, and missing a deadline can trigger penalties even if you ultimately owe nothing. The four payment dates fall in April, June, September, and January of the following year — not evenly spaced, and not aligned with calendar quarters.
The IRS also collects taxes through payroll withholding if you are an employee, and through filing your annual return by April 15. But if you are self-employed, have investment income, or expect to owe more than your withholding will cover, you will need to make estimated payments on the quarterly schedule.
Payment methods vary: you can pay online through IRS Direct Pay (free), by phone, by mail, or through a payment processor that charges a fee. The method you choose affects when the IRS actually receives your money, which matters if you are close to a deadline.
Key Takeaways
- Estimated quarterly tax payments are due April 15, June 15, September 15, and January 15 — not on the 15th of every month.
- If the due date falls on a weekend or federal holiday, the deadline moves to the next business day, so check the IRS calendar each year.
- Paying through IRS Direct Pay is free and shows as received immediately, while credit card payments through a processor incur a fee and may take one to two business days to post.
- Missing a quarterly payment triggers an underpayment penalty calculated from the due date, even if you pay the full amount by April 15 when you file your return.
- You can pay all four quarters at once, or adjust payments if your income changes during the year — the IRS does not require you to split payments evenly.
The four quarterly payment dates and what happens if they fall on a weekend
The IRS sets these four dates each year:
| Quarter | Standard Due Date | Income Covered |
|---|---|---|
| Q1 | April 15 | January 1 – March 31 |
| Q2 | June 15 | April 1 – May 31 |
| Q3 | September 15 | June 1 – August 31 |
| Q4 | January 15 (next year) | October 1 – December 31 |
When a due date lands on a Saturday, Sunday, or federal holiday, the IRS moves the deadline to the next business day. For example, if June 15 falls on a Saturday, you have until Monday June 17. The IRS publishes the adjusted dates each year on its website, so do not assume the standard date is correct — check before you pay.
The penalty for paying late starts accruing on the original due date, not the adjusted one. If you miss the deadline by even one day, the IRS calculates an underpayment penalty from that date forward, compounded quarterly. The penalty rate changes each quarter and is published by the IRS in advance.
How to pay: free methods versus credit card fees
IRS Direct Pay is the fastest and cheapest option. You go to irs.gov, enter your Social Security number or EIN, bank account details, and the payment amount, and the money is deducted on the date you choose. The payment posts immediately and counts as on-time if you schedule it for the due date or earlier. There is no fee.
Credit card payments go through a third-party processor approved by the IRS — typically Paypal, Worldpay, or Authorize.net. The processor charges a convenience fee (usually 1.87% to 2.35% of the payment amount) that you pay on top of your tax bill. The payment may take one to two business days to reach the IRS, so if you are paying by credit card close to a deadline, schedule it earlier than you would with Direct Pay to avoid a late-payment penalty.
Phone payments are available through the same processors and carry the same fees. Mail payments require you to send a check with a payment voucher (Form 1040-ES) to the IRS address for your region. Mail is the slowest method — the IRS considers a payment received on the date it is postmarked, not the date it arrives, but delays in postal delivery can create disputes. Mail only if you have time to spare.
If you are paying by credit card, the payment counts as on-time on the date the processor receives it, not the date you submit it. Check the processor's website for their cutoff time on the due date — many stop accepting payments at 11:59 p.m. Eastern time.
When you owe estimated taxes and when you do not
You owe estimated quarterly payments if you expect to owe $1,000 or more in federal income tax after accounting for withholding and other credits. This typically applies to self-employed people, freelancers, business owners, and people with significant investment income.
If you are an employee with taxes withheld from your paycheck, you usually do not make estimated payments — your employer handles it. However, if you have a second job, rental income, or capital gains, you may need to adjust your withholding or make estimated payments to cover the additional tax.
You can calculate what you owe using Form 1040-ES, which the IRS provides free on its website. The form walks you through your expected income for the year and calculates the quarterly amount. If your income changes during the year, you can recalculate and adjust future payments — you do not have to pay the same amount all four quarters.
What happens if you miss a payment or pay late
Missing a quarterly deadline triggers two separate penalties: an underpayment penalty and, if you owe more than $1,000 total, an accuracy-related penalty on your tax return. The underpayment penalty is calculated from the due date of the missed payment through the date you actually pay, compounded quarterly. The rate is set by the IRS each quarter and is typically 8% annually, but it varies.
You cannot avoid the underpayment penalty by paying the full amount by April 15 when you file your return. The penalty applies to each quarter you underpaid, based on how long the money was late. For example, if you owed $2,500 in Q1 and paid nothing until April 15 of the following year, you owe a penalty on that $2,500 for the entire year, even though you ultimately paid the tax.
If you discover you missed a payment after the fact, pay it as soon as you realize the error. The penalty will still apply, but it will be smaller than if you wait longer. When you file your annual return, the IRS will calculate the exact penalty owed and either bill you or apply it to your refund.
Adjusting payments if your income changes during the year
You do not have to pay the same amount every quarter. If you calculated your Q1 payment based on expected income but your actual income is lower, you can recalculate and pay less in Q2. If income is higher, you can pay more to avoid a large bill at tax time.
To adjust, recalculate using Form 1040-ES with your year-to-date actual income, then pay the new quarterly amount going forward. You do not need to file anything with the IRS — just pay the new amount on the next due date. If you overpaid in earlier quarters, you will get a refund when you file your return, or you can request a refund early by calling the IRS.
Some people pay all four quarters at once in January to simplify cash flow. This is allowed — you can pay the full year's estimated tax on any single due date, or split it however you want across the four dates. The IRS does not require even payments.
Frequently Asked Questions
What if I pay by credit card and the processor's system goes down on the due date?
If the processor's website is down, you have until the next business day to submit your payment and still be considered on-time, provided the processor was genuinely unavailable. Document the outage (take a screenshot) and contact the processor to confirm the payment went through. If you cannot reach them, call the IRS to report the issue before the deadline.
Can I make an estimated tax payment before I know my exact income for the quarter?
Yes. You can pay based on your best estimate, then adjust in the next quarter if your actual income differs. If you overpay, you will receive a refund when you file your return. If you underpay, you will owe the underpayment penalty on the shortfall, so it is better to overestimate slightly than to guess low.
Do I have to make estimated payments if I am retired and living on Social Security?
No, unless you have other income (pensions, investments, rental property) that triggers a tax bill. Social Security alone does not require estimated payments. If you have mixed income, calculate only on the portion that is taxable.
What if I cannot afford to pay the full amount by the due date?
Pay what you can on time to minimize the underpayment penalty, then contact the IRS about a payment plan for the remainder. The IRS offers short-term plans (120 days or less) at no cost and long-term installment agreements for a setup fee. Paying something on time is better than waiting to pay the full amount late.
Does paying estimated taxes affect my credit score?
No. Estimated tax payments are not reported to credit bureaus. Only if you fail to pay and the IRS files a tax lien against you does it appear on your credit report. Paying on time, even if you owe a penalty, keeps the lien off your record.