What estimated tax payments are and who has to make them

Estimated tax payments are quarterly payments you send to the IRS (or your state tax authority) when you expect to owe more than $1,000 in taxes for the year and no employer is withholding taxes from your paychecks. The IRS requires these payments so you don't face a large bill and penalties on April 15th.

You typically owe estimated taxes if you're self-employed, a freelancer, a gig worker, a business owner, or someone with significant investment income. If you have a W-2 job where your employer withholds taxes, you usually don't need to make estimated payments — your employer handles that obligation for you. But if you have both a W-2 job and side income, you may need to adjust your withholding or make estimated payments to cover the side income.

The IRS doesn't send you a bill for estimated taxes. You calculate what you owe, and you're responsible for paying on time. Missing a payment or paying too little can result in underpayment penalties, even if you end up getting a refund when you file your annual return.

Key Takeaways

  • Estimated tax payments are due four times per year — April 15, June 15, September 15, and January 15 — and cover income that isn't subject to employer withholding.
  • You calculate your own estimated tax using IRS Form 1040-ES, which walks you through your expected income, deductions, and tax liability for the year.
  • You can pay estimated taxes online through IRS Direct Pay, by mail with a voucher, or through an electronic federal tax payment system (EFTPS).
  • Underpayment penalties explore if you pay too little, even if you're owed a refund at tax time, so accuracy matters more than perfection.
  • If your income changes mid-year, you can adjust your remaining estimated payments rather than overpaying for the full year.

The four payment dates and how they align with your income

Estimated tax payments are due on a fixed schedule that doesn't match the calendar year. The first payment covers January through March income and is due April 15. The second covers April through May income and is due June 15. The third covers June through August income and is due September 15. The fourth covers September through December income and is due January 15 of the following year.

The dates matter because the IRS calculates underpayment penalties based on how much you owed in each quarter. If you underpay in one quarter but overpay in another, the penalty still applies to the quarter where you fell short. This is why many self-employed people spread their payments evenly across all four quarters — it's simpler than trying to match payments exactly to income earned in each period.

If a due date falls on a weekend or federal holiday, the important date moves to the next business day. The IRS website publishes the exact dates each year, and they're the same every year unless Congress changes the tax code.

How to calculate what you owe using Form 1040-ES

The IRS provides Form 1040-ES, the Estimated Tax Worksheet, to help you calculate your quarterly payment. You can read it free from IRS.gov. The form walks you through your expected income for the year, subtracts deductions and credits, and produces a total tax liability. You then divide that by four to get your quarterly payment amount.

The calculation requires you to estimate your income for the full year — not just the quarter. This is where many people struggle, because income is often unpredictable. If you're in your first year of self-employment, you might use your actual income so far and project it forward. If you're established, you might use last year's income as a baseline and adjust for expected changes. The IRS doesn't require perfect accuracy; it only penalizes significant underpayment.

Form 1040-ES also includes worksheets for self-employment tax (Social Security and Medicare taxes you owe as a self-employed person) and for adjusting your payments if your income varies by quarter. If you have a spouse, you may file joint estimated taxes or separate ones, depending on your situation. The form includes instructions for both.

Payment methods: online, by mail, and through EFTPS

IRS Direct Pay is the simplest method for most people. You go to IRS.gov, enter your tax information and payment amount, and authorize a bank transfer. There's no fee, and you get confirmation when ready. You can schedule a payment in advance if you want to pay on the due date but prefer to set it up earlier.

EFTPS (Electronic Federal Tax Payment System) is an older system that requires you to enroll in advance — it takes one to two business days to set up. Once enrolled, you can make payments online or by phone. EFTPS is free and is often used by accountants and businesses that make multiple payments per year.

You can also pay by mail using a voucher. Form 1040-ES includes a payment voucher you print, fill out, and mail with a check to the IRS address listed on the form. Mail payments take longer to process and offer no confirmation until the IRS cashes your check, so this method is slower and riskier if you're close to a important date.

Credit card and debit card payments are possible through third-party processors, but they charge a convenience fee (usually 1.5 to 2 percent of the payment). Unless you're earning credit card rewards that exceed the fee, this method costs more than it saves.

What happens if you underpay or miss a payment

If you pay less than you owe in a quarter, the IRS charges an underpayment penalty on the shortfall. The penalty rate changes quarterly and is based on the federal short-term interest rate plus 3 percent. For 2024, the rate is roughly 8 percent per year, but it varies. The penalty accrues from the due date of the missed payment until you pay the full amount, either through a later estimated payment or when you file your annual return.

You can avoid the penalty if you pay at least 90 percent of your current year's tax liability or 100 percent of your prior year's liability (110 percent if your prior year income was over $150,000), whichever is smaller. This is called the safe harbor rule. Many people use their prior year's tax as a baseline for estimated payments to stay safely within this rule, even if their income increases.

If you miss a payment entirely, the penalty still applies. There's no grace period. However, if you have a reasonable cause — such as a serious illness or unexpected business loss — you can request penalty relief by filing Form 2210 with your annual tax return and explaining the circumstances. The IRS doesn't always grant relief, but it's worth requesting if your situation was genuinely beyond your control.

Adjusting payments when your income changes mid-year

If your income drops or rises significantly partway through the year, you don't have to keep paying the same amount for all four quarters. You can recalculate your estimated tax based on your actual income through the current quarter and adjust your remaining payments accordingly.

For example, if you calculated your payments based on $60,000 annual income but you've only earned $10,000 by June, you can recalculate and reduce your third and fourth quarter payments. Conversely, if you've earned $40,000 by June and expected only $30,000, you can increase your remaining payments to avoid underpayment penalties.

To adjust, you straightforward recalculate using Form 1040-ES with your updated income projection and pay the new amount for the next quarter. You don't file any special form or notify the IRS in advance. Keep records of your calculation in case the IRS questions your payments later.

State estimated tax payments and how they differ from federal

Most states that have an income tax also require estimated tax payments from self-employed people and others with income not subject to withholding. State estimated tax payments follow a similar quarterly schedule to federal payments, though some states have different due dates or different safe harbor rules.

A few states — including Texas, Florida, and Wyoming — don't have an income tax, so you won't owe state estimated taxes there. Other states, like California, require estimated payments but have stricter underpayment penalties than the federal government. Some states allow you to pay estimated taxes through their own online systems; others require checks mailed to a state tax office.

Your state tax return instructions or your state's department of revenue website will specify the due dates and payment methods. If you work in multiple states or move during the year, you may owe estimated taxes to more than one state, and the rules can differ significantly. An accountant familiar with your state's rules can help you navigate this.

Frequently Asked Questions

What if I don't know my income for the year yet?

Use your best estimate based on income so far and historical patterns. If you're in your first year of self-employment, estimate conservatively. You can adjust your remaining payments later if your income changes. The IRS penalizes significant underpayment, not minor estimation errors.

Can I make one large payment instead of four quarterly payments?

Technically yes, but it's not recommended. If you pay the full year's estimated tax in one quarter, you'll owe underpayment penalties on the three quarters you didn't pay, even though you paid the total amount owed. The safe harbor rule requires you to pay a portion each quarter to avoid penalties.

Do I need to make estimated tax payments if I'm expecting a refund?

Yes. Estimated taxes are based on what you expect to owe, not on whether you'll ultimately get a refund. If you underpay in any quarter, you'll owe an underpayment penalty on your tax return, even if you're owed a refund overall. The refund and the penalty are calculated separately.

What if I pay estimated taxes but then don't earn the income I expected?

You'll likely get a refund when you file your annual return. However, you won't receive interest on the overpayment. If you know mid-year that your income will be lower, you can reduce your remaining estimated payments to avoid overpaying in the first place.

Can my accountant or tax software calculate my estimated taxes for me?

Yes. Most tax software includes an estimated tax calculator, and accountants routinely calculate estimated payments for their clients. If your income is variable or you have complex deductions, working with an accountant is often worth the cost to may support you're paying the right amount and staying within the safe harbor rule.