Know how much estimated tax to pay—and when
If you earn money without enough tax withheld, the IRS may expect estimated payments during the year. Use this calculator to project your 2026 federal income tax and self-employment tax, compare the IRS safe-harbor rules, and work out your four Form 1040-ES installments.
It is especially useful for freelancers, 1099 contractors, self-employed professionals, side-business owners, investors and employees with significant untaxed income.
Federal estimated tax only. State estimated income taxes are calculated and paid separately. No signup or personal identification number is required for this calculator.
2026 Form 1040-ES calculator
Choose whether to estimate your 2026 federal tax from income or enter a projected federal tax amount calculated elsewhere. The example numbers are placeholders for planning, not your personal tax information.
Your 2026 quarterly estimated-tax payment schedule
The first three federal estimated tax deadlines occur during 2026, while the fourth falls in January 2027. The table updates from your calculator inputs. The minimum installment is based on the regular equal-installment method.
| Installment | IRS due date | Minimum regular installment | Your selected plan amount | Amount already credited | Cumulative minimum shortfall |
|---|---|---|---|---|---|
| Payment schedule loads when the calculator initializes. | |||||
Next available installment
—Your next listed IRS payment date appears here.
Evenly spread remaining goal over future dates
$0.00This planning figure does not erase penalties for installments that were previously underpaid or late.
The standard schedule assumes calendar-year taxpayers and regular equal installments. Seasonal businesses, uneven income, farmers, fishermen, fiscal-year filers and certain other taxpayers may use different rules.
IRS 2026 estimated tax safe harbor: 90%, 100% and 110%
The IRS does not simply require every freelancer to pay a flat percentage of gross business revenue. Generally, estimated tax depends on your projected federal tax, qualifying withholding and prior-year tax history.
Current-year method
Usually, paying at least 90% of your 2026 federal tax through timely withholding and estimated payments satisfies the current-year required-payment amount.
Prior-year method
Many taxpayers can instead use 100% of qualifying 2025 tax when the prior-year return covered a full 12-month tax year.
Higher-income prior-year method
If 2025 adjusted gross income exceeded $150,000, or $75,000 for 2026 married filing separately, the prior-year percentage generally increases to 110%.
How the regular safe-harbor calculation works
- Estimate total 2026 federal tax. Account for income tax, self-employment tax and other relevant federal taxes, minus qualifying credits.
- Calculate 90% of your 2026 tax. This gives the usual current-year required annual payment benchmark.
- Check the allowable 2025 prior-year benchmark. Use the applicable 100% or 110% amount when prior-year rules are satisfied.
- Use the smaller valid benchmark. This is normally the required annual payment before withholding.
- Subtract projected 2026 federal withholding. If sufficient withholding already covers the required amount, additional Form 1040-ES payments may not be needed.
- Check the $1,000 rule. Generally, estimated payments are not required if projected tax after withholding and refundable credits is less than $1,000.
- Divide the required remainder into four installments. Make payments by the applicable IRS dates, subject to the special rules and alternative methods described below.
When no estimated payments may be required
- You expect less than $1,000 in tax after withholding and refundable credits.
- Your expected withholding and refundable credits meet the applicable required annual payment.
- You had no 2025 tax liability, 2025 was a full 12-month tax year and you were a U.S. citizen or resident alien throughout 2025.
- Another specific IRS exception applies to your circumstances.
The no-prior-year-tax exception is not interchangeable with leaving the prior-year tax field blank. If your circumstances changed, review the actual 2026 Form 1040-ES instructions.
Official reference: 2026 IRS Form 1040-ES, General Rule, Special Rules and Estimated Tax Worksheet.
How much quarterly estimated tax should you pay?
These examples separate annual tax liability, safe-harbor targets and payments. They demonstrate the regular installment method; they do not assume every business owner has identical deductions or credits.
Example 1: $20,000 expected tax and $12,000 of prior-year tax
Suppose your projected 2026 federal total tax is $20,000, your valid 2025 safe-harbor tax is $12,000, your 2025 AGI was below the higher-income threshold, and you expect $4,000 in 2026 federal withholding.
| Step | Calculation | Result |
|---|---|---|
| 90% current-year amount | $20,000 × 90% | $18,000 |
| 100% prior-year amount | $12,000 × 100% | $12,000 |
| Required annual safe-harbor target | Smaller of $18,000 and $12,000 | $12,000 |
| Less expected federal withholding | $12,000 − $4,000 | $8,000 |
| Regular quarterly installment | $8,000 ÷ 4 | $2,000 |
| Expected remaining tax at filing if only safe harbor paid | $20,000 − $12,000 prepaid | $8,000 |
Result: Under those assumptions, four timely estimated payments of $2,000 meet the safe-harbor target. However, another $8,000 in federal tax could remain due at filing if the annual projection proves correct.
Example 2: W-2 job plus freelance income
Suppose you have $50,000 of federal taxable W-2 wages and $25,000 in net business profit. Your employer withholds federal income tax, but does not normally pay the self-employment tax associated with your separate freelance business.
The calculation should include W-2 wages, business profit, self-employment tax and expected withholding. It should not apply the full 15.3% SE tax rate directly to gross client invoices.
Example 3: Prior-year AGI above $150,000
Suppose your qualifying 2025 tax was $30,000 and your 2025 AGI exceeded $150,000. The prior-year benchmark generally becomes $33,000 rather than $30,000.
If 90% of your projected 2026 tax is lower than $33,000, the current-year amount may still be the smaller permitted target.
How quarterly estimated taxes work for self-employed income
Self-employed people generally pay both federal income tax and self-employment tax. The two amounts are calculated differently. The net profit on Schedule C is usually the starting point—not revenue before business expenses.
SE tax base
For the standard Schedule SE calculation, net earnings subject to self-employment tax are generally based on 92.35% of net business profit.
Social Security portion
Applies to qualifying self-employment earnings up to the remaining 2026 Social Security wage base, after covered employee wages.
Medicare portion
Generally applies to qualifying self-employment net earnings without the ordinary Social Security wage cap.
Example: $60,000 net Schedule C profit
If you have $60,000 in net self-employment profit, no W-2 wages and no special SE-tax exception, a simplified Schedule SE calculation starts with $55,410 in net earnings subject to SE tax.
| Item | Calculation | Result |
|---|---|---|
| Net business profit | After deductible business expenses | $60,000.00 |
| SE tax net earnings | $60,000 × 92.35% | $55,410.00 |
| Social Security SE tax | $55,410 × 12.4% | $6,870.84 |
| Medicare SE tax | $55,410 × 2.9% | $1,606.89 |
| Total regular SE tax | Social Security + Medicare | $8,477.73 |
| Half-SE-tax deduction | $8,477.73 × 50% | $4,238.87 approximately |
The regular SE tax in this illustration is separate from the federal income tax calculation. The deductible half generally reduces adjusted gross income, but not the SE tax itself.
What if you also work as a W-2 employee?
Covered W-2 Social Security wages use part of the annual $184,500 Social Security wage base. If your covered W-2 earnings reach that annual cap, the 12.4% Social Security part of ordinary SE tax generally no longer applies to additional self-employment earnings for the same individual. The Medicare portion can still apply.
When entering a W-2 wage amount, use the additional Social Security wage field when it differs from federal taxable wages. If you are filing jointly and both spouses have self-employment income, calculate each person’s Schedule SE separately; this calculator’s self-employment component assumes one self-employed individual.
Does the qualified business income deduction reduce estimated tax?
It can. Some eligible business owners qualify for a Section 199A qualified business income deduction. The usual starting concept is up to 20% of qualified business income, but the final deduction may be restricted by taxable income, business type and wage or property limitations.
For 2026, the IRS also describes a potential $400 minimum deduction for qualifying active business income of at least $1,000, subject to eligibility. Rather than automatically awarding a deduction to every freelancer, the calculator offers an optional field for a correctly computed amount.
See IRS Form 8995 and 2026 Form 1040-ES for the relevant calculation requirements.
How to pay 2026 quarterly estimated taxes directly to the IRS
You do not need to pay a third-party website to transmit ordinary federal estimated tax payments. The IRS offers official electronic payment options, including Direct Pay and your IRS Online Account.
Option 1: Pay through IRS Direct Pay
- Open the government payment page. Go to IRS Direct Pay.
- Start a payment. Choose the individual or personal tax payment option and continue to the payment details.
- Select the reason. Choose Estimated Tax as the payment reason, not Balance Due or Extension.
- Choose the correct form. Select Form 1040-ES / individual estimated income tax when prompted and apply the payment to tax year 2026.
- Verify your identity. Follow IRS prompts using the tax-return information requested. Joint filers should follow the IRS guidance for the appropriate taxpayer’s identity.
- Enter payment details. Provide the bank account information and confirm the amount and payment date.
- Review and submit. Confirm the tax type and year, authorize the transaction, and save the confirmation number.
- Keep a payment record. Record the payment against the appropriate installment in the calculator or in your tax records.
Option 2: Use your IRS Online Account or EFTPS
IRS Online Account
Visit IRS Online Account to review eligible balances, payment history and payment options.
Follow the account’s payment workflow, verify the 2026 estimated tax year, and retain the confirmation.
Electronic Federal Tax Payment System
Visit EFTPS.gov. Enrollment and account setup may be needed before use.
Select the appropriate individual estimated-tax payment type and verify the payment date and tax year before submitting.
Option 3: Pay by check using Form 1040-ES
- Download official Form 1040-ES. Open the 2026 IRS Form 1040-ES PDF.
- Find the correct payment voucher. Use the voucher corresponding to the relevant installment.
- Complete taxpayer information. Enter the requested name, taxpayer identification number and mailing information.
- Prepare the check or money order. Follow the printed IRS instructions for the payee, tax year and identifying information. Do not send cash.
- Verify the correct mailing address. Use the address table in the current 2026 Form 1040-ES instructions, not a generic IRS mailing address.
- Mail with sufficient time. Keep evidence of mailing and payment. Review the IRS warning about USPS postmark processing dates.
Do quarterly payments have to be equal?
No. The regular Form 1040-ES approach generally uses four equal required installments, but people whose income is uneven throughout the year may qualify to calculate different installment amounts using the annualized income installment method.
This matters if you earned little during January through March but received a major business payment, stock gain or other taxable income later in the year.
| IRS annualization period | Income included | Installment due |
|---|---|---|
| First period | January 1 – March 31 | April 15, 2026 |
| Second period | January 1 – May 31 | June 15, 2026 |
| Third period | January 1 – August 31 | September 15, 2026 |
| Fourth period | January 1 – December 31 | January 15, 2027 |
How to handle irregular income
- Separate actual income by IRS annualization period. Do not confuse the IRS’s cumulative periods with four equally sized three-month quarters.
- Calculate income, deductions and credits through each period. Use appropriate annualization factors and the detailed IRS method.
- Complete the annualized installment computation. Consult Publication 505 and Form 2210 Schedule AI.
- Make the payment required for each period. A smaller early payment may be legitimate when the annualization method supports it.
- File Form 2210 with Schedule AI when required. The 2026 Form 1040-ES instructions specifically address its use for income changes after the first period.
Special estimated tax rules for farmers and fishermen
When at least two-thirds of gross income in the applicable year is from farming or fishing, special requirements can apply. The current-year safe-harbor percentage may be 66⅔% rather than 90%.
Qualifying calendar-year taxpayers can generally pay the required estimated tax by January 15, 2027, or file their 2026 return and pay the balance by March 1, 2027, under the applicable farmer/fisherman rules.
These rules are not automatically modeled by this calculator.
What happens if you miss a 2026 estimated tax deadline?
The IRS may assess an estimated-tax underpayment penalty even if you eventually pay your full tax balance when filing. The penalty generally depends on how much an installment was short and how long that amount remained unpaid.
If you missed an earlier installment
Pay the amount you can as soon as practical, then review the remaining-year estimate. Making a later payment generally reduces the outstanding amount going forward but does not retroactively change the original deadline.
If your income changed
Refigure expected annual federal tax and review the annualized method. An income event late in the year may justify a different installment calculation rather than assuming every earlier quarter was underpaid.
If withholding increased
Withholding is generally treated as paid evenly during the year for estimated-tax penalty purposes unless actual-date treatment is used. Increasing W-2 withholding can therefore be helpful in some situations.
If there was hardship or an unusual event
The IRS provides limited penalty waiver rules for qualifying situations. Review Form 2210 instructions rather than assuming all penalty notices are final.
How to check an underpayment penalty
- Locate tax payments. Gather 2026 withholding amounts, estimated-payment dates, confirmations and applied credits.
- Identify the relevant required installments. Use the appropriate 2026 safe-harbor or annualized income method.
- Review Form 2210. Open IRS Form 2210 and its instructions.
- Calculate any applicable period shortfall. The penalty depends on the actual date and amount of payments and relevant IRS interest rates.
- Review waiver eligibility if applicable. Follow official procedures and documentation requirements.
A single flat penalty percentage applied to the annual estimated tax balance is not an accurate substitute for the IRS day-based Form 2210 method.
Which estimated tax calculation should you use?
Freelancer with fairly steady profit
Use income projection, estimated Schedule C net profit, applicable deductions, safe-harbor information and the regular four-installment schedule.
Employee with side income
Include federal taxable W-2 wages, freelance profit, relevant W-2 Social Security wages and expected income tax withholding. Review whether adjusting Form W-4 is easier.
Already have a completed tax projection
Select the known-tax method, enter your projected total federal tax after credits, then calculate the minimum safe harbor and installments without duplicating an income projection.
Income arrived late in the year
Use the calculator as a full-year planning reference, but calculate the actual required installments using IRS annualized income procedures and Schedule AI.
Large investment gains
Use a completed federal tax projection that accounts for capital-gain or qualified-dividend tax rates, NIIT and other relevant adjustments, then enter the result using known-tax mode.
Need state quarterly payments
Use your state’s tax agency guidance in addition to this federal tool. State payment dates, credits, percentages and penalties can differ.
Does Form 1040-ES include state estimated income taxes?
No. Form 1040-ES is the federal estimated tax process administered by the IRS. State income tax payments, where applicable, are generally made through the relevant state revenue or taxation department.
For example, a self-employed taxpayer in California may need both IRS federal estimated payments and California FTB estimated payments. A New York resident may need federal and New York payments. Residents of some states without a broad personal income tax may not have separate state individual income-tax payments.
For state estimates, use the official state revenue department’s annual guidance and payment portal. Avoid assuming that federal Form 1040-ES rates or safe-harbor thresholds also apply to your state.
Quarterly Estimated Tax Calculator 2026 FAQs
1. Who must pay quarterly estimated taxes in 2026?
Generally, individuals may need estimated payments when they expect to owe at least $1,000 in federal tax after withholding and refundable credits, and their withholding and credits will be below the applicable required annual payment. Freelancers, business owners and taxpayers with untaxed investment or other income are common examples.
2. What are the four IRS estimated tax due dates for 2026?
For calendar-year taxpayers, the 2026 Form 1040-ES installment dates are April 15, 2026; June 15, 2026; September 15, 2026; and January 15, 2027. Special rules apply to certain taxpayers and filing situations.
3. How much should I pay in estimated taxes each quarter?
First determine your required annual payment, generally using the smaller applicable amount from 90% of projected 2026 tax or 100% or 110% of qualifying 2025 tax. Subtract expected federal withholding and divide the remaining requirement into four regular installments. Uneven-income situations may require a different method.
4. What is the $1,000 estimated tax rule?
In most cases, federal estimated tax payments are not required if your projected 2026 tax after withholding and refundable credits is less than $1,000. This does not mean the first $1,000 of income is tax-free or that you will not owe a balance when filing.
5. What does the 110% estimated tax safe harbor mean?
If your 2025 adjusted gross income exceeded $150,000, or $75,000 when your 2026 filing status is married filing separately, the prior-year safe-harbor target is generally 110% rather than 100% of qualifying prior-year tax. The current-year 90% comparison may still produce a smaller required target.
6. Do I pay quarterly tax on gross 1099 income or net profit?
Business profit after allowable business expenses is usually the starting point for self-employment income and tax calculations. Federal income tax and self-employment tax are then estimated using the applicable adjustments and tax rules. Gross client invoices alone are not the self-employment tax base.
7. Can I make estimated tax payments every month instead of quarterly?
Yes. You can make more frequent payments, including monthly payments. The important requirement is that enough tax is paid or credited by each applicable installment deadline. Monthly payments do not automatically change the IRS quarterly required-installment calculation.
8. What happens if I missed an estimated tax payment deadline?
The IRS may assess an underpayment penalty based on the amount and length of the shortfall. Make a payment as soon as practical, review the year’s remaining requirements and consult Form 2210. A late payment generally does not retroactively cure an earlier installment shortfall.
9. Can I skip the January 15, 2027 estimated tax payment?
For 2026 calendar-year individual taxpayers, the fourth installment is generally not required if you file your complete 2026 federal income tax return by February 1, 2027, and pay the full balance due with that return. Special filing rules may apply to farmers, fishermen and other taxpayers.
10. How do I pay Form 1040-ES online?
Visit IRS Direct Pay, choose the Estimated Tax payment reason, apply it to the correct 2026 individual estimated-tax form and tax year, complete identity verification and bank payment details, then save the confirmation. You may also use an IRS Online Account or EFTPS where available.
Official IRS sources for 2026 estimated taxes
These official resources support the calculations, tax thresholds, payment dates, safe-harbor rules and step-by-step processes explained on this page.
- IRS Form 1040-ES (2026 PDF)
Primary source for 2026 estimated-tax worksheets, tax schedules, payment dates and vouchers. - About Form 1040-ES
IRS form updates and instructions. - IRS Publication 505 — Tax Withholding and Estimated Tax
Required annual payments, safe-harbor methods, installment changes and annualized income rules. - IRS — 2026 Tax Inflation Adjustments
Federal marginal tax brackets, standard deductions and related adjustments. - Social Security Administration — Contribution and Benefit Base
2026 Social Security wage limit of $184,500. - IRS Direct Pay
Official payment service for qualifying individual estimated tax payments. - IRS — Direct Pay Payment Types
Selecting Estimated Tax and applying payments to the correct year. - IRS Direct Pay Help
Verification, submission and payment confirmation steps. - IRS Form 2210
Underpayment penalties and annualized income installments. - IRS Tax Withholding Estimator
Review and potentially adjust withholding rather than making separate estimated payments.