As of 2025, the IRS requires individuals to make their federal estimated payments online. To do this:

• Go to the IRS’ Direct Pay website, which can be found here: https://directpay.irs.gov/directpay/payment?execution=e1s1

• In the Apply Payment To box, select “Form 1040 - Income Tax”

• In the Reason for Payment box, select “Estimated Tax”

• In the Tax Period for Payment box, enter the tax year to which you’d like the payment applied. select Continue

• The IRS will now ask you to verify your identity using information on a previously-filed tax return. Enter the information requested, and select Continue

• The IRS will now ask you to enter the amount which you’d like to pay, and your banking information. Enter the information requested, and select Continue

• You will now be prompted to review and confirm the information you’ve entered. Once you are sure that the information presented is correct, submit your payment.

To make an individual Arizona estimated payment:

• Go to Arizona’s payment website, which can be found here: https://www.aztaxes.gov/Home/PaymentIndividual/

• In the Payment is For section, select “Individual”

• In the Payment Type box, select “140ES: Individual Estimated Payment”

• In the Filing Status box, select the filing status you used on your most recently filed tax return, and select Continue

• You will now be prompted to enter the following information. Once entered, select Continue:

  • The payment quarter.

  • Your (and your spouse’s, if applicable) name, social security number, and address. Enter the information which was used on your most recently-filed tax return

  • Your email and phone number

• You will now be asked to enter the amount you’d like to pay, and the payment method. Enter this information, then select Continue. Note that payments made with a credit card may be subject to additional fees.

• You will now be asked to enter your banking information. Enter the information requested, and select Continue.

• You will now be prompted to review and confirm the information you’ve entered. Once you are sure that the information presented is accurate, submit your payment. Be sure to save confirmation that your payment was made.

To make an individual California estimated payment:

• Go to California’s payment website, which can be found here: https://webapp.ftb.ca.gov/webpay/login/login?Submit=Use+Web+Pay+personal

• Enter your social security number and last name in the boxes prompted, and select Login

• Enter your full name and address in the boxes prompted, and select Continue

• In the Select Payment Type section, select “Estimated Tax Payment (Form 540-ES)”, and select Continue

• In the Tax Year box, enter the tax year to which you’d like the payment applied

• Click the Add an estimated tax payment box, and enter the amount you’d like to pay and the date on which you’d like the payment withdrawn. Select Continue

• In the Is this a joint tax payment section, select “Yes” if the filing status on your most recently filed tax return was Married Filing Jointly, and “No” for all other filing statuses. Select Continue

  • If your filing status was Married Filing Jointly, you will be prompted to enter the name and social security number of your spouse. Enter this information, and select Continue

• You will now be asked to enter your banking information. Enter the information requested, and select Continue

• You will now be prompted to review and confirm the information you’ve entered. Once you are sure that the information presented is accurate, submit your payment. Be sure to save confirmation that your payment was made.