If you freelance, run a side hustle, or get income with no tax taken out, the short answer is yes, if you expect to owe $1,000 or more in federal tax for 2026 after withholding and refundable credits. The IRS wants that tax paid in four installments during the year, not in one lump sum in April. This guide covers the 2026 installments (the last one is due January 15, 2027), planning for 2027, who must pay, how to figure the amount, and what happens if you miss a deadline.
The Core Rule: Pay Taxes as You Earn
The federal system is pay-as-you-go. Employees pay through paycheck withholding. If nobody withholds for you, you send estimated payments to the Internal Revenue Service (IRS) four times a year. The rule comes from Internal Revenue Code section 6654, and the IRS requires estimated tax payments once your expected 2026 tax after withholding and credits reaches the threshold above. Paying too little or too late adds an underpayment penalty.
What's Changed for 2026 and 2027
The 2027 figures are official. Under Rev. Proc. 2026-35, the 2027 standard deduction is $16,600 for single filers, and the 2027 Social Security wage base is $192,300.
- New deductions for 2025 through 2028 (tips, overtime, car-loan interest, seniors) can lower your estimate.
- Individuals can no longer enroll in EFTPS.
- For payments made in 2026, the Form 1099-K threshold is $20,000 and 200 transactions, and the 1099-NEC/MISC threshold is $2,000. Income with no form is still taxable.
- The IRS will announce the 2027 Form 1040-ES and the first-quarter 2027 interest rate.
Who Must Pay Quarterly Estimated Taxes
Whether you owe depends on where your income comes from and whether anyone withholds tax from it. The IRS names sole proprietors, partners and S corporation shareholders as people who often owe estimated tax. Investors, retirees and people with two jobs can owe it too.
Self-Employed People and Freelancers
Self-employed individuals owe estimated payments once their expected tax crosses the threshold. A 2026 net self-employment profit of $400 or more also triggers self-employment tax.
| Income Source | Must Pay? | Why |
|---|---|---|
| Freelance writing, design, or consulting | Yes | No employer withholding |
| Gig work (rideshare, delivery) | Yes | Paid without taxes removed |
| Side hustle or part-time business | Yes | No withholding; taxable even if no 1099 is issued |
| Rental property income | Yes | Landlords get no withholding |
Rental income usually isn't subject to self-employment tax, but the income tax on it still counts toward the threshold.
Business Owners
Single-member LLC owners and sole proprietors are self-employed for tax purposes. They owe both income tax and self-employment tax.
S corporation shareholders owe estimated tax on their share of pass-through income shown on Schedule K-1, whether or not it is paid out. Their W-2 salary already has withholding. Partners owe estimated tax on their K-1 share. C corporations pay their own estimated tax when they expect to owe $500 or more for 2026, under the rules on the IRS estimated taxes page.
Investors and Retirees
Retirees can often skip estimated payments by asking for withholding. They can use Form W-4V for Social Security, and Forms W-4P or W-4R for pensions and IRA (individual retirement arrangement) payouts. Investors with large gains may also owe the 3.8% Net Investment Income Tax. For 2025 through 2028, people born before January 2, 1962 get a senior deduction of up to $6,000 each, which can lower their estimate. It phases out above $75,000 of modified adjusted gross income (MAGI), or $150,000 on a joint return.
Income without withholding (2026 rules):
| Income Type | Usually Withheld? | When Estimated Payments Are Needed |
|---|---|---|
| Dividends | No | Counts toward the threshold |
| Capital gains from stock, crypto or property sales | No | Pay in the quarter of the sale, or use the annualized method |
| Interest | No | Counts toward the threshold |
| IRA or pension distributions | Optional; often 10% default on IRA withdrawals | Raise withholding with Form W-4R or W-4P, or pay quarterly |
| Social Security benefits | No, unless you file Form W-4V | Pay quarterly or start W-4V withholding |
People With Multiple Jobs
If you work more than one job and your employers don't withhold enough, you may need estimated payments. This often happens when you have a regular W-2 job plus freelance income on the side. Two-job households should complete Step 2 on the 2026 Form W-4. Step 4(c) adds a flat amount to each paycheck to cover side income, so you don't need vouchers.
Farmers and Fishermen—Special Rules
Farmers and fishermen have different rules. These rules apply if at least two-thirds of your gross income in the current or prior year comes from farming or fishing. You can make one 2026 payment by January 15, 2027. Or you can file your 2026 return and pay everything by March 1, 2027. Your safe harbor is 66⅔% of the current year's tax instead of 90%.
Who Does NOT Need to Pay Quarterly Taxes
You skip quarterly payments if all three of these are true:
- You had no tax liability last year (your total tax was zero, or you weren't required to file).
- You were a U.S. citizen or resident for the entire prior year.
- Your prior year covered a full 12 months.
You also owe nothing quarterly if your expected balance stays under the threshold or your withholding covers your total tax.
Using Withholding Instead of Quarterly Payments
The IRS treats withholding as paid evenly across the year, no matter when it comes out. You can add a flat amount on Step 4(c) of the 2026 Form W-4. You can also start Social Security withholding with Form W-4V (7%, 10%, 12% or 22%), or raise withholding on a pension or IRA payout with Form W-4R or W-4P. Withholding added in December still counts as spread over all four quarters.
The Four Quarterly Due Dates for 2026
The IRS splits the year into four payment periods. Each due date covers the income earned in that period. A short or late payment can trigger a penalty for that period alone, even if the rest of the year is paid.
2026 Payment Schedule
These dates come from the 2026 Form 1040-ES.
| Quarter | Income Period (2026) | Due Date | What Income Covers |
|---|---|---|---|
| First | January 1 – March 31 | April 15, 2026 | Three months of earnings |
| Second | April 1 – May 31 | June 15, 2026 | Two months of earnings |
| Third | June 1 – August 31 | September 15, 2026 | Three months of earnings |
| Fourth | September 1 – December 31 | January 15, 2027 | Four months of earnings |
Tax periods don't match calendar quarters; the second covers only two months. A due date on a weekend or federal holiday moves to the next business day. A mailed payment counts as paid on its U.S. postmark date, not the day it arrives. You can also skip the January 15, 2027 payment if you file your 2026 return by February 1, 2027 and pay the full balance with it.
Looking Ahead: 2027 Estimated Tax Due Dates
The first three 2027 installments fall on April 15, June 15 and September 15, 2027. The fourth falls in January 2028. January 15, 2028 is a Saturday, so the payment moves to the next business day. Confirm the date on the 2027 Form 1040-ES once the IRS posts it. Figure your 2027 payments with the brackets and standard deduction from Rev. Proc. 2026-35.
Calculating Your Quarterly Tax Payments
The math breaks into five steps, using the worksheet in IRS Form 1040-ES. The 2026 version is current, and the IRS will post the 2027 version for 2027 payments. You can also see how to calculate your quarterly estimate with more examples.
Step 1: Estimate Your Total Annual Income
Add up all income you expect this year from every source:
- Net profit from your business or freelance work (revenue minus expenses)
- Wages, tips and overtime pay
- Rental income
- Investment income (dividends, interest, capital gains)
- Crypto or property sales
- Retirement distributions
- Any other income
Start from last year's income if your earnings are stable. Adjust for big changes such as a new business, a property sale or a promotion.
Step 2: Calculate Your Deductions and Credits
The Form 1040-ES worksheet takes Schedule C business expenses first. Then come half of self-employment tax, the standard or itemized deduction, and the 2026 qualified business income (QBI) deduction of 20%. The 2026 standard deduction is $16,100 single, $32,200 joint and $24,150 head of household.
For 2025 through 2028, new deductions cover tips (up to $25,000), overtime ($12,500; $25,000 joint), car-loan interest ($10,000) and seniors ($6,000). From 2026, non-itemizers can deduct up to $1,000 ($2,000 joint) of cash gifts to charity. The child tax credit is $2,200 per child for 2026 and $2,300 for 2027.
Step 3: Figure Out Your Total Tax Liability
Each rate applies only to the dollars inside its bracket. The 2027 single brackets are 10% to $12,800, 12% to $52,025, 22% to $109,125, 24% to $208,325, 32% to $264,550, 35% to $661,375 and 37% above. The 2026 single brackets end at $12,400, $50,400, $105,700, $201,775, $256,225 and $640,600.
Self-employment tax is 15.3% of 92.35% of net profit. Its 12.4% Social Security part stops at $184,500 of combined earnings in 2026 and $192,300 in 2027. The 0.9% Additional Medicare Tax starts above $200,000 single, $250,000 married filing jointly or $125,000 married filing separately; these thresholds are not adjusted for inflation.
Step 4: Apply the Safe Harbor Rules
Before you divide by four, check the safe harbor. It protects you from penalties even if you owe more at filing. Your 2026 payments and withholding must total the smaller of 90% of this year's expected tax or 100% of last year's tax. That becomes 110% if last year's adjusted gross income (AGI) was over $150,000 ($75,000 married filing separately). The prior-year test works only if last year's return covered 12 months.
Example: Last year your total tax was $8,000 and your AGI was $150,000 or less. This year you expect to owe $10,000, and 90% of that is $9,000. The smaller amount is $8,000, so paying $2,000 a quarter keeps you penalty-free. You settle the extra $2,000 when you file.
Step 5: Divide by Four (Or Adjust for Uneven Income)
Divide your safe harbor amount by four. If your income swings, you can use the annualized income installment method, figured on Schedule AI of Form 2210. It bases each payment on what you actually earned in that period, which helps when most income lands late in the year. Attach Form 2210 with Schedule AI to your return if you use it.
Three Popular Scenarios With Real Examples
These scenarios use the official 2027 brackets, standard deduction and wage base for a single filer planning 2027 payments. Numbers are rounded and illustrative.
Scenario 1: Freelance Writer, Steady Income
Sarah is a single freelance writer with no withholding. For 2027 she expects $50,000 of gross income and $8,000 of business expenses, the same as in 2026. Her total 2026 tax was $7,400.
| Step (2027 figures) | Amount | Notes |
|---|---|---|
| Gross income | $50,000 | Same as 2026 |
| Subtract business expenses | -$8,000 | Internet, software, home office |
| Net profit | $42,000 | Schedule C result |
| Multiply by 92.35% | $38,787 | Base for self-employment tax |
| Self-employment tax (15.3%) | $5,934 | Social Security and Medicare |
| Half of self-employment tax | -$2,967 | Adjustment to income |
| Adjusted gross income | $39,033 | |
| Subtract 2027 standard deduction | -$16,600 | Single filer |
| QBI deduction (20% of $22,433) | -$4,487 | Limited by taxable income |
| Taxable income | $17,946 | |
| Income tax | $1,898 | 10% of $12,800 plus 12% of $5,146 |
| Total 2027 tax | $7,832 | Income tax plus self-employment tax |
| 90% of 2027 tax | $7,049 | Current-year safe harbor |
| 100% of 2026 tax | $7,400 | Prior-year safe harbor |
| Required annual payment | $7,049 | The smaller amount |
| Quarterly payment | $1,762 | $7,049 divided by 4 |
For 2027, Sarah pays about $1,762 each quarter. She owes roughly $783 more at filing, with no penalty, because she met the 90% test.
Scenario 2: Gig Worker With Variable Income
Marcus is a single rideshare driver with no withholding and uneven months. He netted $45,000 in 2026 and expects $55,000 in 2027.
| Step (2027 figures) | Amount | Notes |
|---|---|---|
| Net income after expenses | $55,000 | Expected in 2027 |
| Multiply by 92.35% | $50,793 | Base for self-employment tax |
| Self-employment tax (15.3%) | $7,771 | |
| Half of self-employment tax | -$3,886 | Adjustment to income |
| Adjusted gross income | $51,114 | |
| Subtract 2027 standard deduction | -$16,600 | Single filer |
| QBI deduction (20% of $34,514) | -$6,903 | |
| Taxable income | $27,611 | |
| Income tax | $3,057 | 10% of $12,800 plus 12% of $14,811 |
| Total 2027 tax | $10,828 | |
| 90% of 2027 tax | $9,745 | Current-year safe harbor |
| 100% of 2026 tax | $8,579 | Prior-year safe harbor |
| Required annual payment | $8,579 | The smaller amount |
| Quarterly payment | $2,145 | $8,579 divided by 4 |
His 2026 tax of about $8,579 used 2026 figures: $6,358 of self-employment tax, the $16,100 standard deduction, a $5,144 QBI deduction and $2,221 of income tax. For 2027 he pays about $2,145 per quarter and owes about $2,249 at filing, with no penalty. If his slow months come early, the annualized method lets him pay less then.
Scenario 3: Side Hustle Plus W-2 Job
Jennifer is single. She earns a $120,000 W-2 salary and nets $30,000 from online sales. For 2027 her employer withholds about $17,300, roughly the tax on her salary alone.
| Step (2027 figures) | Amount | Notes |
|---|---|---|
| W-2 wages | $120,000 | Primary job |
| Side hustle net income | $30,000 | After costs |
| Self-employment tax | $4,239 | 15.3% of $27,705; combined earnings stay under the 2027 wage base |
| Half of self-employment tax | -$2,119 | Adjustment to income |
| Adjusted gross income | $147,881 | Under $200,000, so no Additional Medicare Tax |
| Subtract 2027 standard deduction | -$16,600 | Single filer |
| QBI deduction (20% of $27,881) | -$5,576 | |
| Taxable income | $125,705 | |
| Income tax | $22,528 | $1,280 + $4,707 + $12,562 + 24% of $16,580 |
| Total 2027 tax | $26,767 | |
| 90% of 2027 tax | $24,090 | Her 2026 tax was higher, so 90% controls |
| W-2 withholding | -$17,300 | Paid through her employer |
| Shortfall | $6,790 | Must be covered during the year |
| Quarterly payment | $1,698 | Or add about $6,790 of extra W-4 withholding |
For 2027, Jennifer must act. She can pay about $1,698 per quarter, or use Form W-4 Step 4(c) to withhold roughly $261 more from each of 26 paychecks.
Scenario 4: Retiree With a Large IRA Withdrawal and a Stock Sale
Linda is single, was born before 1962 and lives on Social Security. Early in the year she takes a big IRA withdrawal with only the default withholding. In August she sells stock for a gain.
She can have the IRA custodian withhold more (Form W-4R) or start Social Security withholding (Form W-4V). She can also pay estimated tax on the gain by the September 15 due date, or use the annualized method. The senior deduction may trim her tax. At higher incomes, the Net Investment Income Tax applies to the gain.
Understanding the Safe Harbor Rules
Safe harbor rules keep you penalty-free even when your payments don't match your exact tax.
The Two Safe Harbor Paths
Path 1 is to pay the current-year percentage of this year's expected tax. It works best when your income is lower than last year.
Path 2 is to pay last year's tax. It is the simplest path, and the safest when income is rising, because last year's number is fixed. Higher earners use the 110% version from Step 4.
Why These Rules Exist
Nobody can predict a year perfectly. If you hit a safe harbor amount, no underpayment penalty applies, even if you owe more at tax time.
What Happens When You Miss Safe Harbor
If you pay less than safe harbor requires, the IRS charges an estimated tax penalty. It is a single interest-style charge, figured for each installment. It runs from the installment's due date until you pay or until the April return due date, whichever comes first. It uses the IRS underpayment rate: 7% for the first quarter of 2026, 6% for the second, and 7% for the third and fourth quarters. The IRS will announce the first-quarter 2027 rate.
Pros and Cons of Quarterly Tax Payments
Paying four times a year has real benefits and a few drawbacks.
Pros of Paying Quarterly Taxes
| Advantage | Why It Matters |
|---|---|
| Avoid large lump-sum bills | Smaller payments through the year |
| Stay compliant with IRS rules | No underpayment penalty |
| Better cash flow management | Cost spread across the year |
| Fewer IRS notices | Avoids underpayment-penalty notices and balance-due letters |
| No surprise debt at filing | You know what you'll owe in April |
Cons of Paying Quarterly Taxes
| Disadvantage | Why It Matters |
|---|---|
| Requires careful planning | You estimate income four times a year |
| Overpaying ties up cash | Extra money waits until your refund |
| Complex calculations | The math can feel hard at first |
| Multiple deadlines to track | Easy to forget a payment date |
| Interest lost on prepayments | Early payments can't earn bank interest |
The Calculation Walkthrough: Form 1040-ES
Form 1040-ES has three parts: the Estimated Tax Worksheet, a record table for your payments and four payment vouchers. The 2026 edition is current. Use the 2027 edition for 2027 payments once the IRS posts it.
Part 1: Estimate Your 2026 Income and Deductions
The worksheet starts with your expected adjusted gross income: wages, interest, dividends, business profit, capital gains, rental and other income, less adjustments. For a capital gain, use profit, not sale price. A $15,000 sale of something that cost $10,000 is a $5,000 gain. Then subtract the 2026 standard deduction (or itemized deductions) and the QBI deduction. For 2027 payments, use the 2027 standard deduction instead. What remains is taxable income.
Part 2: Calculate Your Tax
Income tax comes from the 2026 bracket schedules in the worksheet and in Publication 505. Self-employment tax applies if 2026 net profit is $400 or more. The worksheet adds other taxes, such as the Additional Medicare Tax or Net Investment Income Tax, and subtracts expected credits.
Part 3: Figure Your Quarterly Payment
Start with the safe harbor amount from Step 4 and subtract the withholding you expect. If what's left is under the threshold, you are done. Otherwise divide by four, or use Schedule AI of Form 2210 if income is uneven. Record each payment in the form's record table.
Payment Methods: Ways to Pay
Individuals mainly pay through the IRS Online Account, IRS Direct Pay, a card or digital wallet, electronic funds withdrawal when e-filing, or a check or money order.
Method 1: IRS Direct Pay (Online, Instant)
IRS Direct Pay is free and needs no enrollment. You pay from a checking or savings account and get a confirmation number right away. You can schedule a payment ahead and change or cancel it up to two days before the payment date.
The downside: you re-enter your details each time, and business payments over $10 million must go through EFTPS or a wire.
Method 2: EFTPS—Electronic Federal Tax Payment System
EFTPS is the Treasury's payment system, now mainly for businesses. New individual enrollments have been closed since October 17, 2025, and the IRS is moving existing individual users to the Online Account or Direct Pay. Business enrollment takes up to five business days, and businesses can schedule payments up to 365 days ahead.
Method 3: Mail a Check With Form 1040-ES
Print the 2026 Form 1040-ES voucher and make your check payable to "United States Treasury." Write your Social Security number, "2026 Form 1040-ES" and the tax year on it. Mail it to the address for your state in the form instructions.
A mailed payment is on time if its U.S. postmark is on or before the due date, and certified mail proves the postmark. Under Executive Order 14247 the IRS is moving toward electronic payments, but it still accepts checks.
Method 4: Tax Software Integration
When you e-file, most tax software can schedule next year's four estimated payments by electronic funds withdrawal from your bank account. Some programs only print the vouchers. The software figures the amounts and dates, but it costs money.
IRS Online Account and Card Payments
The IRS Online Account is now the main hub for estimated tax: make or schedule a payment, and confirm each one went to the right tax year. You can also pay by card or digital wallet through an IRS-approved processor, which charges a fee.
A Comparison of Payment Methods
How the options compare for an individual paying 2026 or 2027 estimates:
| Method | Speed | Registration | Best Use |
|---|---|---|---|
| IRS Online Account | Immediate | IRS account login | See payment history, schedule ahead |
| Direct Pay | Immediate | None | One-off payments |
| Debit/credit card or digital wallet | Immediate | None | Convenience; processor fee applies |
| EFTPS | Scheduled | Businesses and existing enrollees only | No new individual enrollment |
| Check or money order | Postmark date | None | Paper record |
| Tax software (electronic funds withdrawal) | Scheduled | Your software | Set up all four payments at filing time |
Common Mistakes to Avoid
Most quarterly-tax trouble comes from seven avoidable errors.
Mistake 1: Skipping Payments Because You Made a Lot of Money
The error: You earn $30,000 in a great quarter and decide to pay it all in April.
Why it fails: The penalty clock starts at each installment's due date, not April 15.
The consequence: Say you fell $5,000 short on the April 15, 2026 installment and never caught up. At the 2026 underpayment rates, that runs about $62 for April 16 through June 30 and about $176 for July 1 through December 31. That is roughly $239 by year-end, and it keeps growing until you pay or until April 15, 2027.
Mistake 2: Underestimating Income to Lower Quarterly Payments
The error: You estimate $40,000 of 2027 income to keep payments small, but you actually earn $60,000.
Why it fails: Safe harbor protects you only if your payments reach the required amount from Step 4.
The consequence: Suppose your 2026 tax was $8,500 and your 2027 current-year test comes to $8,100. Paying $8,000 in 2027 leaves you $100 short, and the penalty runs only on that $100. You still owe the full balance in April.
Mistake 3: Forgetting Self-Employment Tax
The error: You figure income tax but forget self-employment tax.
Why it fails: For many moderate earners it is as large as or larger than income tax. In Sarah's 2027 example, it was about $5,934 against about $1,898 of income tax.
The consequence: If you owe $1,900 of 2027 income tax and $5,900 of 2027 self-employment tax but pay in only $1,900, the penalty runs on the $5,900 you left out.
Mistake 4: Missing Deadlines by a Single Day
The error: You pay on April 16 for an installment due April 15.
Why it fails: Late is late, even by one day.
The consequence: The charge is figured daily, so one day late costs pennies on a typical installment. Weeks or months late add up.
Mistake 5: Using the Wrong Payment Method and Having It Delayed
The error: You mail a check the night before the deadline with no proof of mailing, or start an electronic payment after the due date.
Why it fails: Without a receipt, you can't prove a timely postmark. An electronic payment started late is late.
The consequence: The penalty runs until the IRS treats the payment as made. Use certified mail, or pay electronically and keep the confirmation number.
Mistake 6: Not Adjusting Quarterly Payments When Income Changes
The error: In January you estimated $50,000 of income, but by June you can see you'll earn only $30,000.
Why it fails: Paying as if you'll earn $50,000 means overpaying by thousands, and that money waits until your refund.
The consequence: Rerun the worksheet each quarter and lower the remaining installments when the numbers drop.
Mistake 7: Forgetting About State Taxes
The error: You pay federal quarterly taxes but skip state estimated taxes.
Why it fails: Most states with an income tax require their own estimated payments, with their own thresholds and dates. States with no broad wage income tax, such as Texas and Florida, have none on wages.
The consequence: Separate state and federal penalties on the same income. Check your state revenue department's website.
Do's and Don'ts for Quarterly Tax Success
Habits that keep the process painless:
DO's
| Action | Why |
|---|---|
| Set calendar reminders for deadlines | Prevents missed payments |
| Use your IRS Online Account or Direct Pay | Free, with instant confirmation |
| Check if withholding through Form W-4 can replace quarterly payments | Withholding counts as paid evenly through the year |
| Pay conservatively using safe harbor | Protects you from underpayment penalties |
| Recalculate each quarter if income changes | Matches real earnings |
| Keep records of all payments | Proves you paid |
| Consult a tax pro if income is complicated | Fewer costly errors |
| Make payments as early as possible | Avoids last-minute problems |
DON'Ts
| Action | Why This Fails |
|---|---|
| Don't wait until April 15 to pay the full year | Penalties start from each missed quarterly date |
| Don't mail without proof of postmark | You can't show the payment was on time |
| Don't skip quarters hoping to catch up | Each missed quarter carries its own penalty |
| Don't underestimate to keep payments low | A shortfall below safe harbor draws a penalty |
| Don't forget self-employment tax | It can be larger than your income tax |
| Don't neglect state tax requirements | State penalties come on top of federal ones |
| Don't guess at "close enough" | Check the safe harbor numbers; below them, penalties apply on the shortfall |
Key Entities and How They Relate
Here is who does what in the quarterly tax system.
The Internal Revenue Service (IRS)
The IRS writes the rules, sets the deadlines, figures penalties and processes your payments. Publication 505, Tax Withholding and Estimated Tax, is its main guide to this topic.
The Electronic Federal Tax Payment System (EFTPS)
EFTPS is the U.S. Department of the Treasury's payment system. It now serves businesses and individuals who enrolled before individual enrollment closed (see Method 2).
Form 1040-ES
Form 1040-ES is the official worksheet and voucher package for estimated tax. You need a voucher only when you pay by mail.
Form 2210
Form 2210 is the underpayment penalty form, but most people never fill it out. The IRS usually figures the penalty and sends a bill. You file Form 2210 to use the annualized method on Schedule AI or when the form's instructions require it. You also file it to request a waiver for a casualty, disaster or other unusual circumstance, or for retirement after age 62 or disability with reasonable cause.
Your Tax Professional (CPA or Tax Preparer)
A tax professional can figure your quarterly amounts, plan around income changes and represent you before the IRS. Fees vary.
State Tax Agencies
If your state has an income tax, the state agency collects state estimated taxes on its own schedule.
How These Entities Interact
You figure your tax with Form 1040-ES and pay the IRS through your Online Account, Direct Pay, a card processor, software withdrawal or the mail. The IRS matches each payment to your Social Security number and tax year, so the year must be right. At filing, it compares payments plus withholding to your actual tax. An overpayment becomes a refund, and an underpayment can bring a penalty.
Important Rules About Penalties and Interest
Knowing how the penalty is figured helps you keep it small or avoid it.
How Underpayment Penalties Work
The penalty depends on three factors:
- The shortfall on each installment.
- How long it stays unpaid: until you pay or the April return due date, whichever comes first.
- The IRS rate for each period, listed in the safe harbor section above.
For each rate period, the penalty is shortfall × annual rate × days ÷ 365.
Example: You came up $500 short on the September 15, 2026 installment and paid it on December 15, 2026. That is 91 days at 7%: $500 × 0.07 × 91 ÷ 365 ≈ $8.73. The same shortfall on the April 15, 2026 installment, paid June 15, 2026 (61 days at 6%), costs about $5.01.
When Penalties Are Waived
The IRS waives the estimated tax penalty in only two situations:
- A casualty, disaster or other unusual circumstance caused the underpayment, and the penalty would be unfair.
- You retired after reaching age 62, or became disabled, in the tax year or the year before, with reasonable cause.
First-time penalty relief does not apply here. To request a waiver, file Form 2210 with a written explanation, following the Form 2210 instructions.
Interest vs. Penalties—They're Different
The estimated tax penalty is figured like interest on each installment's shortfall, and it is not compounded. Interest on an overdue balance is compounded daily at the IRS rate set for the fourth quarter of 2026. The failure-to-pay penalty (0.5% a month, up to 25%, under 2026 rules) also applies to an unpaid balance.
What to do next
- Add up the 2026 tax you expect after withholding and refundable credits.
- Run the 2026 Form 1040-ES worksheet and apply the safe harbor from Step 4.
- Choose extra withholding (Form W-4 Step 4(c), W-4V or W-4R) or quarterly payments through your IRS Online Account or Direct Pay.
- Record each payment's date, amount and tax year, and recheck every quarter.
- For 2027, redo the estimate with the Rev. Proc. 2026-35 figures.
FAQs
Do I have to pay quarterly taxes if I just started my business this year?
Not always. If you had no tax liability last year, for a full 12-month year as a U.S. citizen or resident, you owe no estimated tax penalty this year, even if you end up owing more. Otherwise, start paying quarterly once your expected tax after withholding and credits passes the threshold.
Can I pay all four quarters at once instead of spreading them out?
Yes, if you pay early. The 2026 Form 1040-ES lets you pay your whole 2026 estimate by April 15, 2026, the first due date. What you can't do without a penalty is pay late, such as lumping everything into January. The earlier installments would still count as underpaid.
What happens if I miss one quarterly deadline?
A penalty builds daily on that installment's shortfall at the IRS underpayment rate. It stops when you pay or at the April filing deadline. Paying as soon as you can keeps it small. The other installments are still due on their own dates.
Can I request a payment plan if I can't pay my full quarterly tax by the deadline?
There is no installment plan for estimated payments, so pay what you can by each due date to shrink the penalty. After you file, you can apply for an IRS payment plan (online payment agreement) for the balance. Interest and the failure-to-pay penalty continue until you pay it off.
What if I live in a federally declared disaster area?
IRS disaster relief often postpones estimated tax due dates for affected counties. Check the IRS Tax relief in disaster situations page for your area's new dates. A casualty or disaster can also qualify you for a penalty waiver on Form 2210.
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