Arizona Form 140ES is the Individual Estimated Income Tax Payment voucher that Arizona taxpayers use to send the Arizona Department of Revenue (ADOR) income tax during the year on money that has no withholding. People file it when they earn income from self-employment, rent, investments, retirement accounts, or other sources where no employer takes tax out of each paycheck.
The form solves a simple but costly problem. Arizona, like the IRS, runs on a pay-as-you-go system, so waiting until April to pay a full year of tax can trigger an underpayment penalty on top of the tax bill. The state expects most filers to pay either 90% of this year’s tax or 100% of last year’s tax through a mix of withholding and these quarterly vouchers. Arizona collects hundreds of millions of dollars in individual estimated payments each year, and missing even one of the four quarterly due dates can start the penalty clock.
Here is what you will learn in this guide:
- 🧾 Who must file Form 140ES and the income thresholds that trigger it
- 🧮 How to fill out the Estimated Tax Worksheet line by line, in plain English
- 💳 How to pay online through AZTaxes.gov or by mail, step by step
- 👥 Three full examples that follow real filers through the whole form
- ⚠️ The most common mistakes that cause penalties and how to dodge them
What Form 140ES Is and Who Must File It
Arizona Form 140ES is the official voucher for sending the state income tax in four installments during the year instead of in one lump sum at filing time. The form goes to the Arizona Department of Revenue, the agency that collects state income tax under Arizona Revised Statutes Title 43. The voucher itself is short, but it sits on top of an Estimated Tax Worksheet that does the real math. The 2026 version of the booklet is the current one as of this year, so confirm the year printed in the top corner before you use it.
You must make Arizona estimated payments during the year if your Arizona gross income crosses set limits in both the prior year and the current year. The thresholds are $75,000 for single, married filing separately, and head of household filers, and $150,000 for married filing jointly. Arizona gross income for a full-year resident is the same as federal adjusted gross income, which surprises many filers who expect a different number.
Even people below those limits often choose to file. A retiree who turned off withholding on a pension, or a freelancer with a strong year, may file voluntarily to avoid a big April bill. Filing is the safe move when you expect to owe $1,000 or more at tax time and have little or no withholding to cover it.
The statute that requires these payments is A.R.S. Section 43-581. Ignoring it does not just delay tax; it exposes you to an underpayment penalty figured on Arizona Form 221. A common misconception is that estimated payments are optional for everyone. They are mandatory once you cross the income thresholds, and treating them as a choice is how filers end up with a penalty they never saw coming.
Before You Start: Documents and Information You Need
Gathering your numbers first makes the worksheet far less stressful. Estimated tax is built on projections, so the better your records, the closer your payments land to your real bill. Below is the pre-filing checklist; pull each item before you open the form.
- Last year’s Arizona return (Form 140). It gives you the prior-year tax that powers the 100% safe-harbor option, and without it you cannot use that easier method.
- Your Social Security number (and your spouse’s). ADOR matches every payment to an SSN, and a wrong digit sends your money to the wrong account.
- A realistic income estimate for the full year. This drives every line of the worksheet, and a low guess leads to underpayment.
- Records of withholding already taken. Pensions, part-time W-2 jobs, and IRA distributions may withhold tax that reduces what you owe in vouchers.
- Expected deductions. Knowing whether you will take the Arizona standard deduction or itemize changes your taxable income.
- Records of Arizona tax credits you expect. Credits like the credit for contributions to charities cut your projected tax dollar for dollar.
- Your filing status for the year. Status sets which threshold and tax table apply, and guessing wrong throws off the whole estimate.
- Your current mailing address. ADOR sends notices here, and an old address means you may miss a penalty letter.
- A payment method. Have a bank account ready for AZTaxes.gov or a check ready for mail.
Missing any item does not stop you from paying, but it raises the odds your estimate is off. The worksheet is only as good as the inputs, so spend the time up front.
Where to Get the Form and How to Access It
The official Form 140ES and its instructions live on the Arizona Department of Revenue forms page, where each tax year has its own downloadable PDF. Always download the version that matches the year you are paying for, because tax rates and thresholds can change between years. The page lists the current 2026 form alongside prior years, so read the year label before you click.
You have two main ways to access and use the form. The first is the fillable PDF, which you print, complete by hand or on screen, and mail with a check. The second, and the one ADOR prefers, is the online portal at AZTaxes.gov, where you skip the paper voucher entirely and pay by bank draft.
If you pay online, ADOR is clear that you should not also mail the paper form. Doing both can look like two separate payments and create a credit you then have to chase. Pick one channel per quarter and keep proof of it.
A quick word on a related form. Small business owners who elect Arizona’s separate small business income tax may use Form 140ES-SBI instead, a distinct voucher for that election. Most individuals use plain 140ES, so unless you filed the small business income return, stick with the standard form.
Step-by-Step: How to Fill Out Form 140ES Line by Line
Form 140ES has two parts that work together: the Estimated Tax Worksheet that figures how much to pay, and the payment voucher at the bottom that you actually send in. Below, each field gets its own walkthrough so nothing trips you up. Follow them in the order they appear on the form.
Step 1, Line 1: Arizona Gross Income You Expect This Year
This line asks for the total Arizona income you think you will earn for the whole year before deductions. You estimate your full-year federal adjusted gross income, since for a full-year resident that figure is your Arizona gross income. Write a single dollar amount with no cents and no dollar sign, for example 95,000.
Diego Ramirez, a self-employed web designer, expects $95,000 in net business income, so he enters 95,000 on Line 1. If you have several income sources, add them together first and enter the combined total here.
An edge case trips up part-year residents and nonresidents. They enter only the Arizona-source portion of their federal income, not the national total, so a nonresident with $30,000 of Arizona rental income out of $120,000 total enters 30,000.
The most common mistake on this line is lowballing income to shrink the payment. The direct consequence is underpayment, which produces a penalty on Form 221 even though you “followed” the form. A misconception is that this number must be exact. It is an honest projection, and you can adjust later quarters as your real income comes in.
Step 1, Line 2: Estimated Deductions
This line asks how much you will subtract from income, either the Arizona standard deduction or your itemized total. You choose the larger of the two and enter that amount. For 2025 returns the standard deduction was $14,600 for single filers and $29,200 for married filing jointly, and you should confirm the current-year figure in the booklet.
Diego is single and takes the standard deduction, so he enters 14,600 here. A married couple filing jointly who itemize $32,000 in mortgage interest and charity would enter 32,000 instead, because itemizing beats their standard deduction.
The nuance is that Arizona lets you itemize even when amounts differ from federal rules, so run both numbers. The common mistake is forgetting to enter a deduction at all, which overstates taxable income and makes you overpay. A misconception is that you must match your federal choice; Arizona allows its own standard-versus-itemized decision.
Step 1, Line 3: Estimated Taxable Income
This line is simple subtraction: income minus deductions. You take Line 1 and subtract Line 2, then write the result. The form is doing the heavy lifting here, so accuracy on the earlier lines is what matters.
Diego subtracts his 14,600 deduction from his 95,000 income and enters 80,400 on Line 3. If the math gives a number below zero, you enter 0, because you cannot have negative taxable income.
The edge case involves large deductions wiping out income, common for filers with big losses, who simply enter zero. The frequent mistake is a subtraction error done in a hurry, which cascades into a wrong tax figure. A misconception is that this line includes credits; it does not, because credits come later.
Step 2, Line 4: Estimated Tax Using Tax Tables X and Y
This line asks for the Arizona tax on your taxable income, found by applying the rate from Tax Tables X and Y in the booklet. Arizona uses a flat 2.5% individual income tax rate, so for most filers you multiply Line 3 by 0.025. Enter the result as your estimated tax before credits.
Diego multiplies his taxable income of 80,400 by 2.5% and enters 2,010 on Line 4. The flat rate makes this step easier than in years when Arizona used brackets, but always confirm the current rate in the booklet.
The nuance is that the small business income election uses a different rate, which is why those filers use Form 140ES-SBI. The common mistake is applying an old bracketed rate from an older booklet, which inflates the tax. A misconception is that Arizona still has multiple brackets; the state moved to a single flat rate.
Step 2, Line 5: Estimated Tax Credits
This line asks for the total Arizona tax credits you expect to claim, which directly reduce your tax. You add up credits such as the school tax credit or charitable contribution credits and enter the total. Only count credits you are confident you will qualify for.
Diego plans to donate $400 to a qualifying charity and claim the credit, so he enters 400 on Line 5. If you expect no credits, you enter 0 rather than leaving the line blank.
The edge case is refundable versus nonrefundable credits, where some can only reduce tax to zero. The common mistake is counting a credit you may not actually qualify for, which understates your payment. A misconception is that deductions and credits are the same; deductions lower income, while credits lower tax dollar for dollar.
Step 2, Line 6: Estimated Tax After Credits
This line subtracts credits from tax to show your real projected liability. You take Line 4 and subtract Line 5, then enter the result. This is the number that drives how much you must pay through the year.
Diego subtracts his 400 credit from his 2,010 tax and enters 1,610 on Line 6. If credits exceed tax, you enter 0, since you cannot owe a negative amount.
The nuance is that this figure is your starting point for the 90% safe-harbor test. The common mistake is skipping credits here after counting them on Line 5, which double-charges you. A misconception is that this line is your payment; it is your annual tax, which you then split into quarters.
Step 3, Line 7 to Line 9: Choosing Your Required Annual Payment
These lines compare the two safe-harbor methods so you pay the smaller required amount. Line 7 is 90% of the current-year tax from Line 6, Line 8 is 100% of your prior-year Arizona tax, and Line 9 is the smaller of the two. You compute both and circle the lower number as your required annual payment.
Diego figures 90% of 1,610, which is 1,449, on Line 7. His prior-year Arizona tax was 1,300, so he enters 1,300 on Line 8, and because it is smaller he carries 1,300 to Line 9.
The edge case is high earners, where Arizona may require 110% of prior-year tax, so read the booklet note for your income level. The common mistake is using only the 90% method when the prior-year method would cost less, which means overpaying all year. A misconception is that you must use the current-year method; the prior-year safe harbor is fully allowed if you filed last year.
Step 3, Line 10: Arizona Tax You Expect to Be Withheld
This line asks for any Arizona tax that will be withheld for you during the year, which reduces what you owe in vouchers. You add up withholding from W-2 jobs, pensions, and any voluntary withholding on retirement distributions. Enter the full expected total.
Diego has no withholding because he is fully self-employed, so he enters 0 on Line 10. A retiree who has $1,200 withheld from a pension would enter 1,200 here and pay much less through vouchers.
The nuance is that you can raise withholding on a pension or IRA to shrink or even erase your estimated payments. The common mistake is forgetting withholding entirely, which makes you pay twice for the same tax. A misconception is that only W-2 jobs withhold; pensions and retirement accounts can withhold Arizona tax too.
Step 4, Line 11 to Line 22: Total Required Payment and Quarterly Split
This final worksheet step turns your annual number into four installments. You subtract expected withholding (Line 10) from your required annual payment (Line 9) to get the total you must pay through vouchers, then divide by four to find each quarter’s amount. Enter the per-quarter figure on the voucher you are sending.
Diego takes his required 1,300, subtracts 0 withholding, and divides by four to get 325 per quarter. He enters 325 as the payment amount on each Form 140ES voucher across the year.
The edge case is uneven income, such as a freelancer who earns most income late in the year, who may use the annualized income method instead of equal fourths. The common mistake is dividing by the wrong number of remaining quarters when you start late, which underpays the early periods. A misconception is that quarters are even three-month blocks; they are not, since the periods and due dates are uneven.
The Payment Voucher: Name, Address, and SSN Fields
The bottom voucher is what ADOR actually keys into your account, so the name and number fields must be exact. You print your first name, middle initial, and last name, then your spouse’s name if filing jointly, then your full current mailing address. Use the same name order that appears on your Arizona return.
Diego writes Diego R Ramirez and his Phoenix street address in capital letters for clean scanning. A joint filer like Susan and Mark Powell lists both names in the order they use on their joint return.
The nuance is that a P.O. Box is fine for the address if that is where you get mail. The common mistake is a transposed digit in the SSN, which sends your payment to a stranger’s account and forces a long correction. A misconception is that the name does not matter if the SSN is right; ADOR cross-checks both, and a mismatch can hold the payment.
The Payment Voucher: Quarter Checkbox and Payment Amount
This part of the voucher tells ADOR which installment the money is for and how much you are paying. You check the box for the single quarter this payment covers and write the dollar amount in the payment field. You must use a separate voucher for each quarter.
Diego checks the box for the first quarter, writes 325 in the amount field, and mails it before April 15. For the second quarter he uses a fresh voucher and checks the second-quarter box.
The nuance is that you select only one quarter per form, and selecting more than one confuses the posting. The common mistake is checking the wrong quarter, which can make a timely payment look late and trigger a penalty. A misconception is that one voucher can cover the whole year; each quarter needs its own form and its own checkbox.
Three Filled-Out Examples Using Real Scenarios
The examples below follow three common filers through the form from top to bottom. Each table shows the key entries so you can see how the worksheet flows into the voucher.
Example 1: Diego Ramirez, self-employed web designer (single)
| Form Section | What Diego Enters |
|---|---|
| Line 1, Arizona gross income | 95,000 |
| Line 2, Deductions | 14,600 |
| Line 3, Taxable income | 80,400 |
| Line 4, Tax at 2.5% | 2,010 |
| Line 5, Credits | 400 |
| Line 6, Tax after credits | 1,610 |
| Line 9, Required annual payment | 1,300 |
| Line 10, Withholding | 0 |
| Quarterly voucher amount | 325 |
Example 2: Susan and Mark Powell, retiree pension plus investments (married filing jointly)
| Form Section | What the Powells Enter |
|---|---|
| Line 1, Arizona gross income | 180,000 |
| Line 2, Deductions | 29,200 |
| Line 3, Taxable income | 150,800 |
| Line 4, Tax at 2.5% | 3,770 |
| Line 5, Credits | 0 |
| Line 6, Tax after credits | 3,770 |
| Line 9, Required annual payment | 3,393 |
| Line 10, Pension withholding | 1,200 |
| Quarterly voucher amount | 548 |
Example 3: Aisha Bennett, side-business income plus a part-time W-2 job (head of household)
| Form Section | What Aisha Enters |
|---|---|
| Line 1, Arizona gross income | 82,000 |
| Line 2, Deductions | 21,900 |
| Line 3, Taxable income | 60,100 |
| Line 4, Tax at 2.5% | 1,503 |
| Line 5, Credits | 200 |
| Line 6, Tax after credits | 1,303 |
| Line 9, Required annual payment | 1,173 |
| Line 10, W-2 withholding | 600 |
| Quarterly voucher amount | 143 |
Each filer started with a full-year income guess, found their tax at the flat rate, applied any credits, picked the smaller safe-harbor number, subtracted withholding, and split the rest into four. Marcus Lee, a rideshare driver not shown above, would follow the same path with his net driving income on Line 1.
How to File the Completed Form
Arizona gives you two channels, and you should pick one per quarter and keep proof. ADOR prefers electronic payment, but mail is still fully accepted.
Online through AZTaxes.gov. Go to the individual payment page, choose 140ES: Estimate Payments, enter your SSN and the quarter, and pay by electronic check from a bank account at no fee. Payment posts within a few business days, and you should save or print the confirmation number as your proof of filing. If you pay here, do not mail the paper voucher.
By mail. Print the completed voucher, write a check or money order payable to Arizona Department of Revenue with your SSN and the tax year on the memo line, and mail both to the address printed in the 140ES booklet. There is no extra fee beyond the tax, and the postmark date counts as your payment date, so mail a few days early. Keep a copy of the voucher and your check image as proof.
In person and fax. ADOR does not offer a routine in-person or fax channel for estimated payments, so plan on online or mail. If you must visit, call ADOR first to confirm any walk-in option.
The four 2025 due dates were April 15, June 17, September 16, and January 15, 2026, and the current-year dates follow the same mid-month pattern. Confirm exact dates in the current booklet, since a weekend or holiday can shift a deadline.
What Happens After You File
Once ADOR receives your payment, it posts the money to your account under your SSN for that tax year. There is no acceptance letter for a routine estimated payment, so your confirmation number or canceled check is your record. The state holds the credit until you file your annual return.
You claim every estimated payment on your Arizona Form 140 at filing time, where the total reduces your final balance or adds to your refund. This is why accurate SSN entry matters so much; if a payment posted to the wrong number, it will not show up on your return. Check your AZTaxes.gov account during the year to confirm each payment landed.
If you underpaid across the quarters, ADOR may bill an underpayment penalty figured on Form 221. The penalty is interest-based on how much you were short and for how long. Paying the next quarter early can reduce, though not always erase, a shortfall from a prior period.
Mistakes to Avoid When Filling Out the Form
- Lowballing your income estimate on Line 1, which leads to underpayment and a Form 221 penalty.
- Forgetting to subtract expected withholding on Line 10, which makes you overpay all year.
- Checking more than one quarter box on a single voucher, which scrambles how ADOR posts the payment.
- Transposing a digit in your SSN, which sends your money to the wrong account.
- Mailing the paper voucher after paying online, which creates a duplicate payment to untangle.
- Using an old booklet with outdated tax rates, which produces a wrong tax on Line 4.
- Skipping the prior-year safe-harbor comparison, which often means paying more than required.
- Missing a quarterly due date, which starts penalty interest even if later payments are large.
- Writing cents or dollar signs in money fields, which can cause scanning errors on mailed forms.
- Failing to file your annual return after paying, which leaves your payments unclaimed.
- Dividing by four when you start mid-year, which underpays the periods already passed.
- Forgetting to keep your confirmation number, which leaves you with no proof if a payment goes missing.
Do’s and Don’ts
Do:
- Do download the current-year form, because rates and thresholds change between years.
- Do compare both safe-harbor methods, since the smaller one saves you cash.
- Do pay online when you can, because it posts faster and gives an instant confirmation.
- Do keep proof of every payment, so you can prove timeliness if ADOR sends a notice.
- Do use a separate voucher for each quarter, because ADOR posts one quarter per form.
- Do adjust later quarters if your income changes, so your payments track your real tax.
Don’t:
- Don’t guess your income too low, because underpayment triggers a penalty.
- Don’t mail a voucher after paying online, since it can double your payment.
- Don’t check multiple quarter boxes, because it confuses the posting.
- Don’t ignore withholding on Line 10, since it cuts what you owe in vouchers.
- Don’t miss a due date, because penalty interest starts right away.
- Don’t forget to claim the payments on your annual Form 140, or you lose the credit.
Pros and Cons of Filing on Your Own vs. With Help
| Filing on Your Own | Filing With a Tax Pro |
|---|---|
| Free, since you pay no preparer fee | Costs a fee, which adds up over four quarters |
| Fast for simple income like one 1099 | Worth it for complex income with many sources |
| You learn the safe-harbor math yourself | Pro picks the lowest legal payment for you |
| Full control over timing and amounts | Pro tracks deadlines so you do not miss one |
| Easy with the online portal’s prompts | Pro can use the annualized method for uneven income |
Filing on your own works well when your income is steady and you are comfortable with the worksheet, because the flat 2.5% rate keeps the math simple. A tax pro earns their fee when you have several income streams, large credits, or uneven earnings that call for the annualized income method. Many filers start solo and bring in help only in a year that gets complicated.
FAQs
Who must file Arizona Form 140ES?
Yes, you must file if your Arizona gross income tops $75,000 single or $150,000 married filing jointly in both the prior and current year, and you lack enough withholding.
Do I report my federal AGI or a separate Arizona number on Line 1?
Yes, full-year residents use federal adjusted gross income as Arizona gross income, so Line 1 is your federal AGI; part-year and nonresidents use only the Arizona-source portion.
Can I check more than one quarter box on one voucher?
No, you select only one quarter per form and send a separate voucher for each quarter, or ADOR may post the payment incorrectly.
Do I write cents in the payment amount field?
No, you round to whole dollars and skip cents and dollar signs, because extra characters can cause scanning errors on mailed forms.
Is the Arizona estimated tax rate still a set of brackets?
No, Arizona uses a flat 2.5% individual income tax rate, so Line 4 is generally your taxable income times 0.025.
Can I pay all four quarters at once?
Yes, you may prepay, but each quarter still needs its own voucher or its own online transaction so the payments post to the correct periods.
Do I still mail the voucher if I pay on AZTaxes.gov?
No, ADOR applies online payments automatically, so mailing the paper form afterward can create a duplicate payment.
Can I use last year’s tax to set my payments on Line 8?
Yes, you may use 100% of prior-year Arizona tax as your safe harbor, but only if you filed an Arizona return for that prior year.
Will I owe a penalty if I underpay?
Yes, underpayment can trigger an interest-based penalty figured on Form 221, based on the shortfall amount and how long it stayed unpaid.
Do I count pension withholding on Line 10?
Yes, any Arizona tax withheld from pensions, IRAs, or W-2 jobs goes on Line 10 and reduces what you must pay through vouchers.
Can I skip 140ES and just raise my withholding instead?
Yes, increasing withholding on a pension or paycheck can cover your tax and let you avoid the vouchers entirely.
Do I need to file a return after making estimated payments?
Yes, you must file Arizona Form 140 for the year to claim your payments, or the credit sits unclaimed on your account.
Should single filers under $75,000 ever file 140ES?
Yes, filing voluntarily is smart if you expect to owe $1,000 or more with little withholding, since it spreads the bill and avoids penalties.
Do married couples filing jointly use one voucher together?
Yes, a joint couple files a single voucher per quarter listing both names and one spouse’s SSN as shown on their joint Arizona return.
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